CN118815413B - Integrated packer type drilling-free cementing tool - Google Patents
Integrated packer type drilling-free cementing tool Download PDFInfo
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- CN118815413B CN118815413B CN202411307257.1A CN202411307257A CN118815413B CN 118815413 B CN118815413 B CN 118815413B CN 202411307257 A CN202411307257 A CN 202411307257A CN 118815413 B CN118815413 B CN 118815413B
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- shell
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of well cementation equipment, in particular to an integrated packing type drilling-free cementing tool which comprises a shell, a sliding sleeve, a rubber cylinder, a positioning mechanism, a shear pin and a vertically arranged central tube. The invention has reasonable and compact structure, the central tube is put into the preset position in the well along with the casing string, after the first-stage well cementation impact is finished, the casing is continuously pressed, when the spacer sleeve moves downwards to the set position, the positioning mechanism fixes the spacer sleeve and the shell together, the rubber sleeve expands outwards, the outer diameter after expansion reaches the maximum value, when the pressure reaches the maximum bearing value of the rupture disc, the rupture disc breaks, a circulating channel is formed between the inside of the casing and the annular space, and secondary well cementation is carried out.
Description
Technical Field
The invention relates to the technical field of well cementation equipment, in particular to an integrated packing type drilling-free cementing tool.
Background
In the well cementation construction, because some wells are too long in cementing sealing sections and too high in pressure difference, the displacement pressure of common cementing equipment is insufficient, construction requirements are difficult to meet, when a low-pressure easily-lost well is well cemented, the too high pressure difference is caused by too long primary sealing sections, well leakage is easily caused, or when well cementation cannot be realized due to other reasons, a stage cementing process is needed, namely, a stage cementing device is used for cementing the lower part first, and the upper part is well cemented after the completion of the waiting of the stage cementing process, so that the problems can be effectively solved by stage cementing.
The Chinese patent document with the bulletin number of CN202850941U discloses a drilling-free stage cementing device which comprises a body and an opening sleeve, wherein the lower end of the body is provided with internal threads, the inner side of the upper part of the body is fixedly provided with an opening sleeve through an opening sleeve shear pin, the inner side of the upper part of the opening sleeve is fixedly provided with a rubber plug sleeve through a rubber plug sleeve shear pin, the lower end of the rubber plug sleeve is fixedly provided with a boss, the inner side of the lower part of the body is fixedly provided with a clamping table, the inner diameter of the clamping table is the same as the inner diameter of the opening sleeve, the inner side of the clamping table is fixedly provided with an opening sleeve through an opening sleeve shear pin, the opening sleeve comprises an opening sleeve body and an opening sleeve head, the upper end of the opening sleeve body is fixedly provided with the lower end of the opening sleeve head, the outer side of the lower part of the opening sleeve body is fixedly provided with the opening sleeve shear pin, the opening sleeve is sleeved on the inner side of the lower end of the opening sleeve, and at least one sealing cavity is formed between the body, the opening sleeve body and the clamping table, and the clamping table.
The Chinese patent publication No. CN202659209U discloses a hydraulic reverse hole drilling-free classifying hoop which comprises a body, a lower connector, a hole punching sleeve, a falling inner sleeve and a hole closing sleeve, wherein the inner side of the lower end of the body and the outer side of the upper end of the lower connector are fixedly arranged together, at least one circulating through hole is distributed in the lower part of the body along the circumferential radial direction, the hole closing sleeve corresponding to the inner diameter of the lower connector is fixedly arranged in the body above the circulating through hole through a hole shutter Kong Jianding, a stopping device is arranged between the hole closing sleeve and the body, an annular sliding groove is arranged in the inner side of the middle part of the hole closing sleeve, the hole punching sleeve corresponding to the inner diameter of the lower connector is fixedly arranged in the body below the circulating through hole through a hole punching shear pin, the lower end of the falling inner sleeve and the hole punching sleeve are fixedly connected together, the upper part of the falling inner sleeve is sleeved at the upper end of the hole closing sleeve, a guide shear pin is fixedly arranged in the middle part of the falling inner sleeve, the outer end of the guide shear pin is positioned in the sliding groove, a clamping inner boss for fixing the Kong Jiaosai is arranged in the inner side of the lower end of the falling inner sleeve, a hole punching sleeve, a hole closing sleeve and a hole-forming overflow sleeve corresponding to the upper hole cavity is sealed on the upper side of the hole cavity.
The Chinese patent publication No. CN201574724U discloses a full-drift diameter stage cementing device which comprises an upper joint, a lower joint, a barrel, a hole closing sleeve and a rubber plug sleeve, wherein the inner side of the upper end and the inner side of the lower end of the barrel are fixedly connected with the outer side of the lower end of the upper joint and the outer side of the upper end of the lower joint respectively, at least one liquid inlet hole communicated with the inside and the outside is arranged on the middle of the barrel, an inner boss is arranged on the barrel below the liquid inlet hole, a hole closing sleeve with the same inner diameter as the inner diameter of the inner boss is arranged on the inner side of the barrel between the liquid inlet hole and the upper joint, the hole closing sleeve is fixedly arranged with the barrel through an upper shearing pin, a radial positioning groove is arranged at the lower part of the hole closing sleeve, a rubber plug sleeve is arranged at the inner side of the hole closing sleeve, the lower end of the rubber plug sleeve is fixedly arranged with the inner boss through a lower shearing pin, the outer end of the positioning pin penetrates through the rubber plug sleeve to be positioned in the positioning groove and can move downwards, at least one through hole communicated with the liquid inlet hole is arranged on the rubber plug sleeve below the positioning groove, and the inner diameter of the boss is larger than the inner boss of the boss at the lower part of the middle part of the sleeve.
The traditional classification hoop open-cell closed-cell structure adopts the shear pin to fix, and the shear pin is sheared after reaching shearing force, reaches classification hoop open-cell, closed-cell's purpose, but current packing type cementing tool and above-mentioned cementing tool's spare part are more, and the structure is complicated, and action operation is complicated at the during operation, leads to whole classification cementing ware inefficacy because of a certain structure inefficacy easily, produces great influence to the construction safety.
Disclosure of Invention
The invention provides an integrated packing type drilling-free cementing tool, which overcomes the defects of the prior art, and can effectively solve the problems that the existing packing type cementing tool has complex structure, complex operation actions, easy influence among the actions and easy follow-up all actions which are not normally completed due to the failure of a single structure.
The technical scheme is that the integrated packing type drilling-free cementing tool comprises a shell, a sliding sleeve, a rubber cylinder, a positioning mechanism, a shear pin and a vertically arranged central tube, wherein the outer side of the upper part of the central tube is fixedly arranged with the inner side of the upper part of the shell, a limiting sleeve is fixedly arranged on the outer side of the lower end of the central tube, the sliding sleeve is sleeved outside the central tube corresponding to the position above the limiting sleeve, the rubber cylinder is sleeved outside the central tube corresponding to the position between the lower end of the sliding sleeve and the upper end of the limiting sleeve, a spacer sleeve sleeved between the outer side of the central tube and the inner side of the shell is fixedly arranged at the upper end of the sliding sleeve, the shear pin is arranged between the spacer sleeve and the shell, the positioning mechanism is arranged at the outer side of the spacer sleeve corresponding to the position above the shear pin and can be fixed with the shell together when the spacer sleeve moves downwards to a set position, a plurality of liquid inlets which are communicated with the inner side of the upper part of the central tube are arranged, the inner side of the central tube is internally and externally sheared by liquid flowing into the liquid inlets at a certain pressure, the shear pin is enabled to be mutually close to the rubber cylinder, the inner side of the central tube corresponding to the position between the positioning mechanism and the upper end of the shear pin is sleeved outside the central tube, the inner side of the central tube corresponding to the position between the positioning mechanism and the position between the lower end of the shear pin and the position of the sleeve is provided with a piston, the inner side of the inner circulation channel which is communicated with the inner side of the piston and the piston is arranged, and the inner side of a piston channel corresponding to the piston channel, and the inner side of a piston channel and the piston is arranged.
The following are further optimizations and/or improvements to the above-described inventive solution:
the positioning mechanism can comprise an anti-withdrawal snap ring, the outer side of the upper part of the spacer is provided with a first positioning ring groove with an outward opening, the anti-withdrawal snap ring is sleeved in the first positioning ring groove, the inner side of the lower part of the outer shell corresponding to the position between the outer circulation channel and the shear pin is provided with a second positioning ring groove with an inward opening, and the first positioning ring groove moves downwards to be completely or partially corresponding to the second positioning ring groove, and the outer side of the anti-withdrawal snap ring is outwards expanded and then is clamped in the second positioning ring groove.
The closing sleeve can be sleeved between the outer side of the central tube corresponding to the position between the liquid inlet hole and the upper end of the spacer bush and the inner side of the shell, a gap is arranged between the lower end of the closing sleeve and the upper end of the spacer bush, at least one first sealing component is arranged on the outer side of the closing sleeve at intervals up and down, and at least two second sealing components are arranged on the inner side of the closing sleeve at intervals up and down.
The inner side of the upper part of the closing sleeve can be provided with a third positioning ring groove with an inward opening, the outer side of the upper part of the central pipe corresponding to the position between the third positioning ring groove and the inner circulation channel is provided with a conical mounting hole with an inner side and an outer side being large and an inner side being small, a matched locking piece is sleeved in the mounting hole, an elastic resetting piece is arranged between the first end of the locking piece and the inner side of the closing sleeve, the second end of the locking piece is propped against the inner wall of the mounting hole by the elastic resetting piece, and when the lower end of the closing sleeve moves downwards to be in contact with the upper end of the spacer, the first end of the locking piece moves into the third positioning ring groove.
The inner side of the central tube can be sleeved with a plug seat with a tubular structure, the inner side of the plug seat corresponding to the position of the outer circulation channel is provided with a communicating hole which is communicated with the inside and the outside, the outer side of the plug seat corresponding to the position of the locking piece is provided with a locking groove, the second end of the locking piece is inserted into the locking groove, the outer side of the upper part of the plug seat corresponding to the position between the locking groove and the communicating hole and the outer side of the lower part of the plug seat corresponding to the position below the communicating hole are both provided with a first sealing ring, and the inner side of the plug seat is provided with a stepped runner with the gradually reduced diameter from top to bottom.
When the lower end of the closing sleeve moves downwards to be in contact with the upper end of the spacer, at least one second sealing component is arranged on the inner side of the closing sleeve and is respectively positioned above and below the inner circulation channel.
The inner side of the spacer bush corresponding to the lower position of the inner circulation channel can be provided with a second sealing ring, and a third sealing ring is arranged between the outer side of the upper part of the central tube corresponding to the upper position of the liquid inlet hole and the inner side of the shell.
The rubber cylinder can be in a T shape with a narrow outer part and a wide inner part, the outer side of the lower end of the sliding sleeve protrudes downwards to form an upper fixing ring sleeved on the outer side of the upper part of the rubber cylinder, and the outer side of the upper end of the limiting sleeve protrudes upwards to form a lower fixing ring sleeved on the outer side of the lower part of the rubber cylinder.
The invention has reasonable and compact structure, when in use, the upper end of the central tube and the sleeve are fixedly arranged together through threaded connection, when the sleeve is put down in well cementation, the upper end of the central tube and the sleeve are connected, and then the central tube and the sleeve are put down into a preset position in the well together with the sleeve string, the lower part of the integrated packing type drilling-free cementing tool is primary well cementation, the upper part of the integrated packing type drilling-free cementing tool is secondary well cementation, after the collision pressure of the primary well cementation is finished, the sleeve is continuously pressed, liquid acts on the upper end of the spacer through the liquid inlet, so that the spacer and the sliding sleeve are subjected to downward pressure, when the spacer moves downwards to a set position, the positioning mechanism fixes the spacer and the shell together, at the moment, the rubber sleeve expands outwards, the outer diameter after expansion reaches the maximum value, meanwhile, the outer circulation channel corresponds to the inner circulation channel, when the pressure reaches the maximum pressure bearing value of the rupture disc, the inner part of the sleeve and the annulus form a circulation channel, and secondary well cementation is carried out.
Before the sliding sleeve moves, the rupture disc cannot bear high pressure, after shear pins are sheared, the sliding sleeve is instantaneously completed, the rupture disc can be continuously boosted to open after the completion, the sequence succession is guaranteed, the rupture pressure of the rupture disc is larger than the pressure of the shear pins to be sheared, the sliding sleeve is more safe, the rupture disc is opened instantaneously, meanwhile, the rupture disc is opened in a short time, the circulation is established, and the sliding sleeve is sealed outside a central tube, so that continuous sealing can be guaranteed, and as long as pressure exists in a well, even if only hydrostatic column pressure exists, the sliding sleeve can continuously descend in place, and the success rate of expanding sealing and opening an external circulation channel can be improved.
According to the invention, the expansion sealing of the rubber cylinder can be realized through only one sliding sleeve, the positioning mechanism can form a positioning effect on the sliding sleeve, the sliding sleeve cannot move up and down, the inner side and the outer side of the integrated sealing type drilling-free cementing tool are still two independent systems, the two systems cannot be connected in series, the success rate of the tool is greatly improved, and the tensile strength of the tool is also greatly increased due to the overall design of the central tube.
Drawings
Fig. 1 is a schematic view of a cross-sectional front view of a preferred embodiment of the present invention.
FIG. 2 is a schematic diagram of a cross-sectional front view of a shear pin in accordance with the preferred embodiment of the present invention after the shear pin has fallen.
Fig. 3 is a schematic cross-sectional front view of a closure in accordance with a preferred embodiment of the present invention.
Fig. 4 is a schematic cross-sectional front view of the preferred embodiment of the present invention after it has been inserted into the closure.
Fig. 5 is a schematic cross-sectional front view of the closing sleeve in the preferred embodiment of the present invention.
Fig. 6 is a schematic cross-sectional front view of the plug seat according to the preferred embodiment of the present invention.
Fig. 7 is an enlarged schematic view of the structure a in fig. 1.
The coding in the drawing is that 1 is a shell, 2 is a sliding sleeve, 3 is a rubber cylinder, 4 is a shear pin, 5 is a central tube, 6 is a limiting sleeve, 7 is a spacer, 8 is a liquid inlet, 9 is an inner circulation channel, 10 is an outer circulation channel, 11 is a rupture disk, 12 is an anti-withdrawal snap ring, 13 is a first positioning ring groove, 14 is a second positioning ring groove, 15 is a closing sleeve, 16 is a first sealing component, 17 is a second sealing component, 18 is a third positioning ring groove, 19 is a mounting hole, 20 is a locking piece, 21 is an elastic resetting piece, 22 is a plug seat, 23 is a communication hole, 24 is a locking groove, 25 is a first sealing ring, 26 is a runner, 27 is a second sealing ring, 28 is a third sealing ring, 29 is an upper fixing ring, 30 is a lower fixing ring and 31 is a closing plug.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout form of fig. 1 of the specification, for example, the positional relationship of front, rear, upper, lower, left, right, etc. is determined according to the layout direction of fig. 1 of the specification.
The invention is further described below with reference to examples and figures:
According to the embodiment I, as shown in figures 1,2, 4, 5, 6 and 7, the integrated packing type drilling-free cementing tool comprises a shell 1, a sliding sleeve 2, a rubber sleeve 3, a positioning mechanism, a shear pin 4 and a vertically arranged central tube 5, wherein the outer side of the upper part of the central tube 5 is fixedly arranged with the inner side of the upper part of the shell 1, a limiting sleeve 6 is fixedly arranged on the outer side of the lower end of the central tube 5, the sliding sleeve 2 is sleeved on the outer side of the central tube 5 corresponding to the position above the limiting sleeve 6, a rubber sleeve 3 is sleeved on the outer side of the central tube 5 corresponding to the position between the lower end of the sliding sleeve 2 and the upper end of the limiting sleeve 6, a shear pin 4 is arranged between the upper end of the sliding sleeve 2 and the shell 1, a shear pin 4 is arranged on the outer side of the spacer 7 corresponding to the position above the shear pin 4, a plurality of liquid inlet holes 8 which are communicated with each other inside and outside are fixedly arranged with the shell 1 when the spacer 7 moves downwards to a set position, a liquid in a certain pressure is filled in the inner side of the central tube 5, a circulating channel 10 corresponding to the inner side of the shear pin 4 and a circulating channel 10 corresponding to the inner side of the shear pin 10, and the circulating channel 10 is arranged on the inner side of the circulating channel 10 corresponding to the inner side of the circulating channel 10 of the outer circulating channel 10, and the circulating channel 10 is arranged between the inner side of the circulating channel 10 and the circulating channel 10 of the sealing channel 10 and the inner side of the sealing channel 10.
According to the requirement, the outer side of the central tube 5 is in a step shape which gradually becomes smaller from top to bottom, the outer side of the upper part of the central tube 5 and the inner side of the upper part of the shell 1 are fixedly installed together through threaded connection, a sealing ring is installed between the outer side of the central tube 5 between the threaded connection section of the central tube 5 and the shell 1 and the liquid inlet hole 8 and between the outer side of the central tube 5 and the shell 1, the outer side of the lower end of the central tube 5 and the inner side of the limiting sleeve 6 are fixedly installed together through threaded connection, the outer sides of the upper end and the lower end of the shell 1 are both provided with chamfers, the maximum outer diameter of the shell 1 is the maximum outer diameter of a cementing tool, an installation ring groove is arranged in an outer circulation channel 10 corresponding to the outer side position of the rupture disc 11, an elastic retainer ring is installed in the installation ring groove, so that the limiting effect on the rupture disc 11 can be achieved, The sliding sleeve 2 and the spacer 7 are integrally arranged, the upper end of the sliding sleeve 2 corresponding to the outer side position of the spacer 7 is in contact with the lower end of the shell 1, a first conical surface with a large upper part and a small lower part is arranged on the inner side of the upper end of the sliding sleeve 2 corresponding to the inner side position of the spacer 7, a second conical surface matched with the first conical surface is arranged on the outer side of the central tube 5, and the second conical surface is abutted against the first conical surface, so that the structure of the integrated sealing type drilling-free cementing tool after assembly is more compact.
When the well cementing device is used, the upper end of the central tube 5 is fixedly installed with the sleeve through threaded connection, when the sleeve is in well cementing, the upper end of the central tube 5 is connected with the sleeve, then the central tube is placed into a preset position in a well along with a sleeve string, the lower part of the integrated packing type well cementing tool is primary well cementing, the upper part of the integrated packing type well cementing tool is secondary well cementing, after the primary well cementing is finished, the sleeve is continuously pressurized, liquid acts on the upper end of the spacer 7 through the liquid inlet hole 8, the spacer 7 and the sliding sleeve 2 are subjected to downward pressure, when the spacer 7 moves downwards to a set position, the positioning mechanism fixes the spacer 7 and the shell 1 together, the outer diameter of the rubber sleeve 3 is expanded outwards at the moment, the outer diameter of the expanded rubber sleeve reaches the maximum value, meanwhile, the outer circulation channel 10 corresponds to the inner circulation channel 9, when the pressure reaches the maximum pressure bearing value of the rupture disc 11, the inside of the sleeve and an annular space form a well cementing circulation channel, and the secondary well cementing is carried out.
Before the sliding sleeve 2 moves, the rupture disc 11 cannot bear high pressure, after the shear pins 4 are sheared, the sliding sleeve 2 descends to be instantly completed, the rupture disc 11 can be continuously boosted to be opened after the completion, the sequence is guaranteed, the rupture pressure of the rupture disc 11 is larger than the shearing pressure of the shear pins 4, the sliding sleeve 2 is more safe, the rupture disc 11 is opened in a short time, the circulation is established, the sliding sleeve 2 is sealed and arranged outside the central tube 5 in a sealing mode, continuous sealing can be guaranteed, and therefore, as long as the pressure in a well is high, the sliding sleeve 2 can continue descending to be in place even if only hydrostatic column pressure exists, and the success rate of expanding sealing and opening the external circulation channel 10 can be improved.
According to the invention, the expansion sealing of the rubber cylinder 3 can be realized through only one sliding sleeve 2, and the positioning mechanism can perform the positioning function on the sliding sleeve 2, so that the sliding sleeve 2 cannot move up and down, the inner side and the outer side of the integral sealing type drilling-free cementing tool are still two independent systems, the two systems cannot be connected in series, the success rate of the tool is greatly improved, and the tensile strength of the tool is also greatly increased due to the integral design of the central tube 5.
The integral packing type drilling-free cementing tool can be further optimized or/and improved according to actual needs:
In the second embodiment, as shown in fig. 1,2, 4,5, 6 and 7, the positioning mechanism comprises an anti-withdrawal snap ring 12, a first positioning ring groove 13 with an outward opening is arranged on the outer side of the upper part of the spacer 7, the anti-withdrawal snap ring 12 is sleeved in the first positioning ring groove 13, a second positioning ring groove 14 with an inward opening is arranged on the inner side of the lower part of the shell 1 corresponding to the position between the outer circulation channel 10 and the shear pin 4, and when the first positioning ring groove 13 moves downwards to completely or partially correspond to the second positioning ring groove 14, the outer side of the anti-withdrawal snap ring 12 is outwards expanded and then is clamped in the second positioning ring groove 14.
According to the requirement, the width of the anti-withdrawal snap ring 12 is larger than the depth of the second positioning ring groove 14, the widths of the first positioning ring groove 13 and the second positioning ring groove 14 are the same, the difference between the width of the first positioning ring groove 13 and the thickness of the anti-withdrawal snap ring 12 is not larger than 5mm, and the outer side of the anti-withdrawal snap ring 12 is propped against the inner side of the shell 1. In the use, after shear pin 4 is cut off, make behind spacer 7 the downward movement make first positioning ring groove 13 and the thickness that second positioning ring groove 14 coincide be greater than the thickness of preventing moving snap ring 12, prevent moving snap ring 12 outside open the back outer loop face be located second positioning ring groove 14, prevent moving snap ring 12 inner loop face be located first positioning ring groove 13 like this, prevent moving snap ring 12 can play the fixed action to shell 1 and spacer 7, can avoid spacer 7 and sliding sleeve 2 to upwards remove back packing element 3 to restore to the original form, can guarantee the expansion seal effect of packing element 3.
In the third embodiment, as shown in fig. 1,2, 4,5, 6 and 7, a closing sleeve 15 is sleeved between the outer side of the central tube 5 corresponding to the position between the liquid inlet hole 8 and the upper end of the spacer 7 and the inner side of the shell 1, a gap is arranged between the lower end of the closing sleeve 15 and the upper end of the spacer 7, at least one first sealing assembly 16 is arranged at an upper-lower interval outside the closing sleeve 15, and at least two second sealing assemblies 17 are arranged at an upper-lower interval inside the closing sleeve 15.
According to the requirement, the first sealing component 16 and the second sealing component 17 are all known high-pressure sealing components, such as tetrafluoro sealing components, and can also be known sealing rings, the closing sleeve 15 is of a tubular structure, the upper part of the central tube 5 corresponding to the upper side of the liquid inlet hole 8 is provided with a step surface, the upper end of the closing sleeve 15 can be in contact with the step surface, and also can be provided with intervals, the outer side and the inner side of the upper end of the closing sleeve 15 and the outer side and the inner side of the lower end of the closing sleeve 15 are respectively provided with a chamfer, after the first sealing component 16 and the second sealing component 17 are arranged, the separating sleeve 7 moves downwards, the inner circulation channel 9 and the outer circulation channel 10 are communicated, slurry flows into the annular space between the central tube 5 and the inner side of the shell 1 from the liquid inlet hole 8, the slurry acts on the upper end of the closing sleeve 15, and the closing sleeve 15 can play a role in closing the inner circulation channel 9 when the lower end of the closing sleeve 15 and the upper end of the separating sleeve 7 are in contact with each other.
In the fourth embodiment, as shown in fig. 1, 2, 4, 5 and 6, the inner side of the upper part of the closing sleeve 15 is provided with a third positioning ring groove 18 with an inward opening, the outer side of the upper part of the central tube 5 corresponding to the position between the third positioning ring groove 18 and the inner circulation channel 9 is provided with a conical mounting hole 19 with a large outer side and a small inner side, a matched locking piece 20 is sleeved in the mounting hole 19, an elastic reset piece 21 is arranged between the first end of the locking piece 20 and the inner side of the closing sleeve 15, the second end of the locking piece 20 is propped against the inner wall of the mounting hole 19 by the elastic reset piece 21, and when the lower end of the closing sleeve 15 moves downwards to be in contact with the upper end of the spacer 7, the first end of the locking piece 20 moves into the third positioning ring groove 18.
According to the requirement, the elastic restoring member 21 is a known technology, such as a compression spring, the locking piece 20 and the elastic restoring member 21 may also be a known technology, such as an outer ring table is fixed at the outer side of the first end of the locking piece 20, an inner ring table is arranged in the mounting hole 19, the elastic restoring member 21 is arranged between the inner ring table and the outer ring table, the elastic restoring member 21 is a compression spring in a compressed state, a magnet may also be fixed in the third positioning ring groove 18, when the lower end of the closing sleeve 15 moves downward to contact with the upper end of the spacer 7, the first end of the locking piece 20 is sucked into the third positioning ring groove 18 by the magnet, and the mounting hole 19 is located between the uppermost second sealing assembly 17 and the third positioning ring groove 18. During the use, prevent moving back snap ring 12 can block into second locating ring groove 14 after sliding sleeve 2 moves down certain distance, outer circulation channel 10 and inner circulation channel 9 correspond each other, break after the liquid pressure in center tube 5 reaches the setting value like this, close and communicate each other between the inside of center tube 5 and the shell 1 outside, can carry out first order well cementation, after the completion of first order well cementation is waited to congeal, carry out second grade well cementation, after the completion of second grade well cementation cementing, release close and close 31 and replace thick liquid, it is finished to replace thick liquid, install stopper seat 22 in center tube 5 in advance, throw into and close stopper 31, stopper seat 22 is fixed in the inside of center tube 5 under the effect of locking piece 20, close stopper 31 can seal stopper seat 22 and inner circulation channel 9, at this moment beat the pressure, replace thick liquid flows into from feed liquor hole 8 and closes the cover 15 up end and acts on closing the cover 15, close the cover 15 and move down, until locking piece 20 first end moves into third locating ring groove 18, close the inner circulation channel 9 and outer circulation channel 10 at this moment, simultaneously locking piece 20 second end is to install in hole 19, stopper seat 22 is prevented from falling to stopper seat 22 and stopper seat 31 under the bottom of hole, the well hole is prevented from falling down to stopper seat 22.
As shown in fig. 1, 2,4,5 and 7, the inner side of the central tube 5 is sleeved with a plug seat 22 with a tubular structure, the inner side of the plug seat 22 corresponding to the position of the outer circulation channel 10 is provided with a communication hole 23 communicated with the inside and the outside, the outer side of the plug seat 22 corresponding to the position of the locking block 20 is provided with a locking groove 24, the second end of the locking block 20 is inserted into the locking groove 24, the outer side of the upper part of the plug seat 22 corresponding to the position between the locking groove 24 and the communication hole 23 and the outer side of the lower part of the plug seat 22 corresponding to the position below the communication hole 23 are respectively provided with a first sealing ring 25, and the inner side of the plug seat 22 is provided with a stepped flow passage 26 with gradually reduced diameters from top to bottom.
The stepped flow passage 26 has two steps as required, and the communication hole 23 is located inside the plug seat 22 of the two steps. After the primary cementing is completed, the secondary cementing is carried out, the existing known closing plug 31 is released to replace slurry, the closing plug 31 is shown in the attached figure 3, after the slurry replacement is completed, the closing plug 31 is sleeved into the plug seat 22, the flow passage 26 is closed, the closing plug 31 can also close the communication hole 23, thereby separating the outer circulation passage 10 from the upper sleeve, after the wellhead is pressurized, the replacing slurry flows into the upper end of the closing sleeve 15 from the liquid inlet hole 8, the replacing slurry acts on the upper end surface of the closing sleeve 15, the closing sleeve 15 moves downwards, when the lower end of the closing sleeve 15 moves downwards to be in contact with the upper end of the spacer 7, the third positioning annular groove 18 corresponds to the locking piece 20, the first end of the locking piece 20 moves into the third positioning annular groove 18 under the action of the elastic resetting piece 21, at this moment, the second sealing assembly 17 and the closing sleeve 15 can play the role of closing the outer circulation passage 10, when the first end of the locking piece 20 moves into the third positioning groove 18 under the action of the elastic resetting piece 21, namely, the second end of the locking piece 20 retracts into the annular groove 19, namely, the second end of the locking piece 20 is not separated from the plug seat 22, and the sealing plug seat 22 is not separated, and the hole is further reached.
In a sixth embodiment, as shown in fig. 5 and 6, when the lower end of the closing sleeve 15 moves downwards to contact with the upper end of the spacer 7, at least one second sealing assembly 17 is located on the inner side of the closing sleeve 15 and above and below the inner circulation channel 9 respectively.
By this arrangement, the sealing performance of the closing sleeve 15 against the inner circulation passage 9 can be improved during use.
In the seventh embodiment, as shown in fig. 1,2, 4,5, 6 and 7, a second sealing ring 27 is installed on the inner side of the spacer 7 corresponding to the position below the internal circulation channel 9, and a third sealing ring 28 is installed between the outer side of the upper part of the central tube 5 corresponding to the position above the liquid inlet 8 and the inner side of the housing 1.
According to the requirement, the outside of the spacer 7 corresponding to the positions between the anti-withdrawal clamping ring 12 and the rupture disc 11, and between the rupture disc 11 and the shear pin 4 is provided with a sealing ring. In the use, through such setting, can promote the leakproofness between center tube 5 upper portion outside and the outer tube inboard, can also promote the sealing performance between spacer 7 and the center tube 5, can produce decurrent effort to spacer 7 after the liquid flows into spacer 7 up end through inner loop 9 like this, can cut shear pin 4 fast, make sliding sleeve 2 remove back extrusion packing element 3 downwards, can promote work efficiency.
As shown in fig. 1, 2, 4, 5 and 6, the rubber cylinder 3 is in a T shape with a narrow outside and a wide inside, the outer side of the lower end of the sliding sleeve 2 protrudes downwards to form an upper fixing ring 29 sleeved on the outer side of the upper part of the rubber cylinder 3, and the outer side of the upper end of the limiting sleeve 6 protrudes upwards to form a lower fixing ring 30 sleeved on the outer side of the lower part of the rubber cylinder 3.
In the use, the sliding sleeve 2 moves down the back for go up solid fixed ring 29 and lower solid fixed ring 30 and be close to each other and extrude the packing element 3, seal after the outside of packing element 3 middle part outwards expands, go up solid fixed ring 29 and lower solid fixed ring 30's setting, on the one hand can play spacing effect to packing element 3, on the other hand can play the guard action to packing element 3's upper end and lower extreme, play the expansion effect after the middle part of packing element 3 can expand at first.
The technical characteristics respectively form the embodiments of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
The use process of the optimal embodiment of the invention comprises the steps that the primary well cementation finishes releasing flexible plug replacement cement paste, the bottom of the flexible plug is contacted with a touch pressing seat to touch and press, at the moment, a closed space is formed in a sleeve, the wellhead is pressed, the sleeve is continuously pressurized, the pressure acts on the upper end face of a sliding sleeve 2, the pressure can push the sliding sleeve 2 to move downwards, after reaching a certain pressure, a shear pin 4 is sheared, the sliding sleeve 2 moves downwards to push a rubber cylinder 3 to expand and seal, an anti-withdrawal clamping ring 12 is opened and clamped into a second positioning annular groove 14 after being released, thus the sliding sleeve 2 forms self-locking, the sliding sleeve 2 can be prevented from returning, the pressure continues to be pressed after the expansion and sealing is completely finished, a rupture disc 11 is broken, the inner side of a central tube 5 and the outer side of a shell 1 are mutually communicated, and circulation is started to be established, and secondary well cementation is performed.
According to the invention, the expansion sealing of the rubber cylinder 3 can be realized through only one sliding sleeve 2, the anti-back clamping ring 12 can form a positioning function on the sliding sleeve 2, the sliding sleeve 2 cannot move up and down, and the inner side and the outer side of the integrated sealing type drilling-free cementing tool are still two independent systems which can not be connected in series.
Before the sliding sleeve 2 moves, the rupture disc 11 cannot bear high pressure, after the shear pins 4 are sheared, the sliding sleeve 2 descends to be instantly completed, the rupture disc 11 can be continuously boosted to be opened after the completion, the sequence is guaranteed, the rupture pressure of the rupture disc 11 is larger than the shearing pressure of the shear pins 4, the sliding sleeve 2 is more safe, the rupture disc 11 is opened instantly, meanwhile, the circulation between the inner side and the outer side of the integrated sealing type no-drilling cementing tool is established in a short time, and as the inner side and the outer side of the sliding sleeve 2 are provided with sealing rings during movement, continuous sealing can be guaranteed, so that the sliding sleeve 2 can continue to descend to be in place as long as the pressure in a well is in the well even if only the hydrostatic column pressure exists, and the success rate of expanding sealing and opening the outer circulation channel 10 can be improved.
The pressure on the upper side and the lower side of the closing sleeve 15 is always the same, so that the closing sleeve 15 can not move all the time, after secondary cementing is finished, the closing plug 31 is released, the effect of closing the flow channel 26 in the plug seat 22 can be achieved after the closing plug 31 is in place, a closed cavity is formed in a sleeve above the closing plug 31, when the pressure is continuously pressed again, the liquid inlet hole 8 is filled with liquid, the pressure on the upper side of the closing sleeve 15 is increased, the pressure on the lower side of the closing sleeve 15 is kept unchanged, the closing sleeve 15 starts to move downwards under the pressure, when the lower end face of the closing sleeve 15 contacts the upper end face of the sliding sleeve 2, the second sealing assemblies 17 are arranged on the upper side and the lower side of the inner circulation channel 9, and therefore, the closing sleeve 15 closes the inner circulation channel 9, the first sealing assembly 16 and the second sealing assembly 17 enable the inner side of the central tube 5 to be disconnected from the outer side of the shell 1, and the integrity of the sleeve is ensured.
When the closing sleeve 15 is in place, the elastic reset piece 21 enables the locking piece 20 to move outwards, the connection between the plug seat 22 and the central tube 5 is released, and at the moment, the upper side of the closing plug 31 is provided with pressure which pushes the closing plug 31 to drive the plug seat 22 to move downwards, so that the drift diameter of a tool is realized.
The invention can complete the internal and external communication or cutting-off of the integral sealing type drilling-free cementing tool by throwing the closing plug 31 and then pressing the closing plug, can also ensure the integrity of the sleeve, reduces some pushing and driving actions among parts compared with the existing tool, and ensures that the actions are simpler, thereby reducing the risk of misoperation, and the central tube 5 penetrates up and down and is directly connected with the upper sleeve and the lower sleeve, so that the assembly is simple, the coaxial matching among the parts is better, and the assembly is more reliable.
Claims (5)
1. The utility model provides an integrative packing type exempts from to bore cementing tool which characterized in that includes shell, the sliding sleeve, the packing element, positioning mechanism, shear pin and vertical center tube that sets up, the upper portion outside of center tube and shell upper portion inboard fixed mounting together, the center tube lower extreme outside fixed mounting has the stop collar, the center tube outside seal cover that corresponds the position above the stop collar is equipped with the sliding sleeve, the center tube outside cover that corresponds the position between sliding sleeve lower extreme and the stop collar upper end is equipped with the packing element, the fixed spacer that is equipped with in the position between center tube outside and shell inboard of sliding sleeve upper end, install the shear pin between spacer and the shell, the spacer outside that corresponds the position above the shear pin is equipped with positioning mechanism, positioning mechanism can fix together with the shell when moving down to the settlement position along with the spacer, the center tube upper portion inboard is equipped with a plurality of inside and outside communicating feed liquor hole, the inside and outside shear pin is equipped with after flowing into the feed liquor of certain pressure behind the feed liquor hole and make sliding sleeve and stop collar be close to extrusion packing element each other, the center tube inboard that corresponds the position between the positioning mechanism and the shear pin is equipped with inside the inside and outside communicating inner circulation channel, the shell that corresponds the position between the inner circulation channel is equipped with inside and outside in the inner circulation channel and outside of inner circulation channel and has rupture discs that are equipped with the outside communicating in the outer circulation channel and outside in the condition when the pressure is fixed in the outer circulation channel and burst in the sealing state;
The positioning mechanism comprises an anti-withdrawal snap ring, a first positioning ring groove with an outward opening is arranged on the outer side of the upper part of the spacer, the anti-withdrawal snap ring is sleeved in the first positioning ring groove, a second positioning ring groove with an inward opening is arranged on the inner side of the lower part of the outer shell corresponding to the position between the outer circulation channel and the shear pin, and the outer side of the anti-withdrawal snap ring is clamped in the second positioning ring groove after being expanded outwards when the first positioning ring groove moves downwards to be completely or partially corresponding to the second positioning ring groove;
A closing sleeve is sleeved between the outer side of the central tube corresponding to the position between the liquid inlet hole and the upper end of the spacer bush and the inner side of the shell, a gap is arranged between the lower end of the closing sleeve and the upper end of the spacer bush, at least one first sealing component is arranged at the outer side of the closing sleeve at intervals up and down, and at least two second sealing components are arranged at the inner side of the closing sleeve at intervals up and down;
The inside third positioning ring groove that is equipped with the opening inwards of cover upper portion, the outside of center tube upper portion that corresponds the position between third positioning ring groove and the internal circulation passageway is equipped with inside and outside intercommunication and outside big inside little toper mounting hole, and the cover is equipped with assorted locking piece in the mounting hole, installs the elasticity piece that resets between locking piece first end and the cover inboard that closes, elasticity piece that resets makes locking piece second end and mounting hole inner wall offset, when closing the cover lower extreme and moving to contact each other with the spacer upper end downwards, locking piece first end moves to in the third positioning ring groove.
2. The integral packing type drilling-free cementing tool according to claim 1, wherein a plug seat of a tubular structure is sleeved on the inner side of the central tube, communication holes which are communicated with the inside and the outside are formed in the inner side of the plug seat corresponding to the position of the outer circulation channel, a locking groove is formed in the outer side of the plug seat corresponding to the position of the locking block, a second end of the locking block is inserted into the locking groove, a first sealing ring is arranged on the outer side of the upper part of the plug seat corresponding to the position between the locking groove and the communication hole and the outer side of the lower part of the plug seat corresponding to the position below the communication hole, and a stepped flow passage with the diameter gradually reduced from top to bottom is formed in the inner side of the plug seat;
Or/and, when the lower end of the closing sleeve moves downwards to be in contact with the upper end of the spacer, at least one second sealing component is arranged on the inner side of the closing sleeve and is respectively positioned above and below the inner circulation channel.
3. The integrated packing type drilling-free cementing tool according to claim 1 or 2, wherein a second sealing ring is arranged on the inner side of the spacer bush corresponding to the position below the inner circulation channel, and a third sealing ring is arranged between the outer side of the upper part of the central tube corresponding to the position above the liquid inlet hole and the inner side of the shell.
4. The integrated packing type drilling-free cementing tool according to claim 1 or 2, wherein the rubber sleeve is in a T shape with a narrow outer side and a wide inner side, the outer side of the lower end of the sliding sleeve protrudes downwards to form an upper fixing ring sleeved on the outer side of the upper part of the rubber sleeve, and the outer side of the upper end of the limiting sleeve protrudes upwards to form a lower fixing ring sleeved on the outer side of the lower part of the rubber sleeve.
5. The integrated packing type drilling-free cementing tool according to claim 3, wherein the rubber sleeve is in a T shape with a narrow outer side and a wide inner side, the outer side of the lower end of the sliding sleeve protrudes downwards to form an upper fixing ring sleeved on the outer side of the upper part of the rubber sleeve, and the outer side of the upper end of the limiting sleeve protrudes upwards to form a lower fixing ring sleeved on the outer side of the lower part of the rubber sleeve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411307257.1A CN118815413B (en) | 2024-09-19 | 2024-09-19 | Integrated packer type drilling-free cementing tool |
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| CN202411307257.1A CN118815413B (en) | 2024-09-19 | 2024-09-19 | Integrated packer type drilling-free cementing tool |
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| CN118815413B true CN118815413B (en) | 2025-01-21 |
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| CA2018366A1 (en) * | 1989-07-06 | 1991-01-06 | Martin P. Coronado | Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| CN104121001A (en) * | 2014-07-31 | 2014-10-29 | 于世江 | Drilling-free cement injecting device for horizontal well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6651743B2 (en) * | 2001-05-24 | 2003-11-25 | Halliburton Energy Services, Inc. | Slim hole stage cementer and method |
| CN202850941U (en) * | 2012-10-21 | 2013-04-03 | 中国石油集团西部钻探工程有限公司 | Drilling-free-type grading cementing device |
| FR3003891B1 (en) * | 2013-03-27 | 2015-04-03 | Saltel Ind | DEVICE FOR CONTROLLING AND INSULATING AN EXPANSIBLE SHAPE-SHAPED TOOL FOR INSULATING AREAS IN A WELL |
| CN104110234B (en) * | 2014-07-31 | 2017-06-30 | 于世江 | Horizontal cementing exempts to bore blind plate circulation cementing method |
| CN106761545A (en) * | 2017-02-28 | 2017-05-31 | 中国石油天然气股份有限公司 | Oil and gas well cementing pipe column and cementing method |
| CN113338846B (en) * | 2020-02-18 | 2022-09-23 | 中国石油化工股份有限公司 | Packing type stage cementing device |
| CN112177565B (en) * | 2020-09-27 | 2021-05-14 | 德州众凯石油科技有限公司 | Salvaging type drilling-plug-free cementing well completion device |
| CN116411868A (en) * | 2021-12-31 | 2023-07-11 | 中国石油化工股份有限公司 | Small-well drilling-free plug cementing device, plug and well cementing construction method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2018366A1 (en) * | 1989-07-06 | 1991-01-06 | Martin P. Coronado | Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| CN104121001A (en) * | 2014-07-31 | 2014-10-29 | 于世江 | Drilling-free cement injecting device for horizontal well |
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