CN108240204B - Gravel packing tool for sand control of sidetracking drilling machinery - Google Patents
Gravel packing tool for sand control of sidetracking drilling machinery Download PDFInfo
- Publication number
- CN108240204B CN108240204B CN201611219802.7A CN201611219802A CN108240204B CN 108240204 B CN108240204 B CN 108240204B CN 201611219802 A CN201611219802 A CN 201611219802A CN 108240204 B CN108240204 B CN 108240204B
- Authority
- CN
- China
- Prior art keywords
- joint
- leather cup
- plug
- hole
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012856 packing Methods 0.000 title claims abstract description 57
- 239000004576 sand Substances 0.000 title claims abstract description 31
- 238000005553 drilling Methods 0.000 title abstract description 16
- 239000010985 leather Substances 0.000 claims abstract description 88
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 35
- 238000013040 rubber vulcanization Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 29
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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 discloses a gravel packing tool for preventing sand of a sidetracking drilling machine. The gravel packing tool comprises: the device comprises an upper joint, a lock sleeve, a circulating joint, a central pipe, a sealing component, a shunt inner cylinder, a shunt outer cylinder, a plug, a lower joint, a circulating pipe joint, a steel ball and a plugging sleeve; the lock sleeve is sleeved outside the upper joint and is connected with the upper joint in a separable mode; the sealing assembly comprises a leather cup, and the outer diameter of the upper part of the leather cup is smaller than that of the lower part of the leather cup; a first annular space is arranged between the central pipe and the circulating joint, a second annular space is arranged at the lower parts of the outer splitter cylinder, the inner splitter cylinder and the sealing assembly, and a third annular space is arranged between the inner splitter cylinder, the central pipe and the plug; meanwhile, through holes for passing the fluid are respectively arranged at the corresponding positions of the circulating joint, the central pipe, the sealing component, the inner fluid dividing cylinder, the inner fluid outer cylinder and the plug. The gravel packing tool is compact in structure and small in outer diameter, and can be used for performing sand prevention operation on the opposite side drilling well in the side drilling well.
Description
Technical Field
The invention relates to the technical field of sand control in oil and gas field development, in particular to a gravel packing tool for preventing sand of a sidetracking drilling machine.
background
at present, many oil fields enter the middle and later development stages, and due to the influence of geological factors and engineering factors, partial oil well casings and partial water well casings are damaged to different degrees; meanwhile, after the oil field enters the middle and later development stages, the problems of insufficient reserve reserves, low recovery ratio, high drilling cost and the like exist, and the development of the old oil field is seriously influenced. Sidetrack drilling techniques are one of the effective ways to solve the above problems. Sidetrack drilling is a well that is sidetracked inside an old well using special downhole tools. Similar to common oil and water wells, sidetracking wells also have the problem of sand production to affect normal production, so sand control operation is required.
the existing sand control process mainly comprises a chemical sand control process and a mechanical sand control process. The chemical sand control process comprises the steps of filling a sand producing layer in a shaft with a granular material capable of being solidified, and stopping formation sand from entering the shaft after the material is solidified and formed under formation conditions; the mechanical sand control process is to put a gravel packing tool into the shaft and pack gravel into the sand producing stratum through the gravel packing tool, so as to prevent the stratum sand from entering the shaft.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: the chemical sand control process has the problems of short effective period, low sand control success rate and the like. The mechanical sand control has strong adaptability to stratum, can be effectively constructed, has a certain recovery effect on the productivity of stratum, has higher success rate, mature process and lower relative cost, but the window opening position pressure bearing of the sidetrack is less than 15Mpa, the well deviation is large, the inner diameter of the casing pipe is smaller (phi 82.25mm), the existing gravel packing tool has the defects of incompact structure and larger integral size, and cannot be put into the sidetrack well.
Disclosure of Invention
in order to solve the technical problems, the invention provides a gravel packing tool which is compact in structure, small in size and capable of being lowered into a sidetrack well and used for sand control of sidetrack drilling machinery.
specifically, the method comprises the following technical scheme:
Embodiments of the present invention provide a gravel packing tool for sand control of a sidetracking drilling machine, the gravel packing tool comprising:
The upper joint is used for being connected with an oil pipe;
the lock sleeve is sleeved outside the upper joint and is connected with the upper joint in a separable mode;
the circulating joint is connected with the lower part of the lock sleeve;
The central pipe is positioned inside the circulating joint, is connected with the lower part of the upper joint and has a first annular space with the circulating joint;
The sealing assembly is sleeved outside the circulating joint; and the lower portion of the seal assembly is sealed to the center tube; the sealing assembly comprises a leather cup, and the outer diameter of the upper part of the leather cup is smaller than that of the lower part of the leather cup;
The inner shunting body cylinder is connected with the lower part of the sealing component;
The outer shunting body cylinder is sleeved outside the inner shunting body cylinder, and a second annular space is formed between the outer shunting body cylinder and the lower parts of the inner shunting body cylinder and the sealing component; the upper part of the outer shunting body cylinder is sealed with the lower part of the sealing component and is higher than the upper part of the inner shunting body cylinder;
the plug is connected with the lower part of the central pipe, and a third annular space is formed among the inner splitter cylinder, the central pipe and the plug;
the inner surface of the lower joint is sealed with the outer surface of the plug, and the outer surface of the lower joint is connected with the inner surface of the lower part of the inner barrel of the shunt body;
the circulating pipe joint is connected with the inner surface of the plug;
the steel ball is positioned in the plug and has a diameter larger than the inner diameter of the circulating pipe joint;
A first through hole is formed in the position, above the sealing assembly, of the circulating joint, a second through hole is formed in the position, between the inner shunting body cylinder and the outer shunting body cylinder, of the lower portion of the sealing assembly, a third through hole, a fourth through hole and a fifth through hole are correspondingly formed in the lower portion of the central tube, the upper portion of the inner shunting body cylinder and the outer shunting body cylinder, and a sixth through hole and a seventh through hole are formed in the corresponding positions of the lower portion of the inner shunting body cylinder and the upper portion of the plug;
The gravel packing tool further comprises: and the plugging sleeve is positioned in the third annular space and can move up and down to open or plug the third through hole and the fourth through hole.
Further, the seal assembly includes: the upper leather cup seat, the upper leather cup pressing cap, the lower leather cup seat, the lower leather cup and the lower leather cup pressing cap are sequentially sleeved outside the circulating joint from top to bottom and are mutually limited and fixed;
The upper part of the upper leather cup seat is limited and fixed through a limiting step on the outer surface of the circulating joint, the upper part of the lower leather cup pressing cap is connected with the lower part of the circulating joint, and the lower part of the lower leather cup pressing cap is sealed with the central pipe;
the upper part of the inner shunt body cylinder is connected with the lower part of the lower leather cup pressing cap;
The upper part of the outer shunt body cylinder is sealed with the lower part of the lower leather cup pressing cap;
The second annular space is positioned between the outer splitter cylinder and the inner splitter cylinder and between the second annular space and the lower part of the lower leather cup pressing cap;
The first through-hole is disposed on the circulation joint at a location above the epithelial bowl.
Furthermore, the central tube is provided with a limiting step for limiting the upper part of the plugging sleeve.
further, the gravel packing tool further comprises a spring positioned in the third annular space, the upper end of the spring is connected with the plugging sleeve, and the lower end of the spring is connected with the lower joint.
further, the gravel packing tool further comprises:
the sliding sleeve is positioned inside the upper joint; the sliding sleeve is fixed with the upper joint through shear pins;
the lock sleeve is connected with the upper joint through a lock block;
The sliding sleeve limits the locking block;
when the sliding sleeve moves downwards, the locking block can be released.
Further, the sliding sleeve, the upper joint and the central pipe are coaxial; the plugging sleeve, the inner shunt cylinder and the lower connector are coaxial.
further, the outer surface of the sliding sleeve and the inner surface of the upper joint are sealed through a first sealing ring; the outer surface of the lower leather cup pressing cap and the inner surface of the outer barrel of the shunt body are sealed through a second sealing ring; the inner surface of the lower leather cup pressing cap and the outer surface of the central pipe are sealed through a third sealing ring; the inner surface of the plugging sleeve and the outer surface of the central pipe are sealed through a fourth sealing ring; and the inner surface of the lower joint and the outer surface of the pipe plug are sealed through a fifth sealing ring.
Further, the central pipe and the upper joint, the central pipe and the plug, the circulation joint and the lock sleeve, the circulation joint and the lower leather cup pressing cap, the lower leather cup pressing cap and the inner shunting body cylinder, the plug and the circulation pipe joint and the lower joint and the inner shunting body cylinder are all in threaded connection.
furthermore, the circulation connector is connected with the lock sleeve through a reverse-threaded connection, and the upper connector is connected with the circulation connector through a reverse-threaded connection.
Further, the upper leather cup and the lower leather cup are formed through rubber vulcanization.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
According to the embodiment of the invention, the structure and the connection relation of each part of the gravel packing tool are optimized and improved, so that the gravel packing tool can complete the steps required in mechanical sand control operations such as extrusion packing, circular packing, well washing, releasing and the like, meanwhile, the structure of the gravel packing tool is more compact, and the outer diameter size of the gravel packing tool is greatly reduced. The gravel packing tool provided by the embodiment of the invention has the outer diameter of 76mm, can be put into a sidetracked well and performs sand prevention operation on the sidetracked well, thereby ensuring the normal production of the sidetracked well. The gravel packing tool provided by the embodiment of the invention can ensure a larger inner drift diameter while reducing the outer diameter, and can meet the requirement of large pressure difference production.
drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a gravel packing tool for sand control in a sidetracking drilling machine according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a partially enlarged structure of an upper packing cup pressure cap and portions thereof in a gravel packing assembly for sand control in a sidetracking drilling machine according to an embodiment of the present invention;
fig. 3 is a partially enlarged schematic structural view of a lower leather bowl seat and the following parts of the gravel packing tool for sand control of a sidetracking drilling machine according to the embodiment of the invention.
the reference numerals in the drawings denote:
1-upper joint; 2-a first rubber ring; 3, sliding sleeve; 4-cutting nails; 5-locking the block; 6-locking sleeve; 7-a circulation joint;
8-a central tube; 9-epithelial bowl base; 10-coating a leather cup; 11-capping of the epithelial bowl; 12-lower leather bowl seat;
13-lower leather cup; 14-pressing and capping the lower leather cup; 15-a second rubber ring; 16-a third rubber ring; 17-a shunt outer cylinder;
18-a splitter inner barrel; 19-a fourth rubber ring; 20-plugging sleeve; 21-a spring; 22-plug;
23-a fifth rubber ring; 24-steel balls; 25-lower joint; 26-a circulation pipe joint;
x1-first via; x2-second via; x3-third via; x4-fourth via; x5-fifth via;
X6-sixth via; x7-seventh via;
YI-first annular space; y2 — second annular space; y3-third annular space.
Detailed Description
in order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings. Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
embodiments of the present invention provide a gravel packing tool for sand control of a sidetracking drilling machine, referring to fig. 1 in combination with fig. 2 and 3, the gravel packing tool comprising:
the upper joint 1 is used for connecting with an oil pipe;
a lock sleeve 6 which is sleeved outside the upper joint 1 and is detachably connected with the upper joint 1;
the circulating joint 7 is connected with the lower part of the lock sleeve 6;
A central tube 8 located inside the circulation joint 7, connected to the lower part of the upper joint 1, and having a first annular space Y1 between itself and the circulation joint 7;
The sealing component is sleeved outside the circulating joint 7; and the lower part of the sealing component is sealed with the central tube 8; the sealing assembly comprises a leather cup, and the outer diameter of the upper part of the leather cup is smaller than that of the lower part of the leather cup;
The inner shunting body cylinder 18 is connected with the lower part of the sealing component;
the outer shunting body cylinder 17 is sleeved outside the inner shunting body cylinder 18, and a second annular space Y2 is formed at the lower parts of the inner shunting body cylinder 18 and the sealing component; the upper part of the outer shunt cylinder 17 is sealed with the lower part of the sealing component and is higher than the upper part of the inner shunt cylinder 18;
the plug 22 is connected with the lower part of the central pipe 8, and a third annular space Y3 is formed between the inner splitter cylinder 18 and the central pipe 8 and the plug 22;
the inner surface of the lower joint 25 is sealed with the outer surface of the plug 22, and the outer surface of the lower joint 25 is connected with the inner surface of the lower part of the inner barrel 18 of the shunting body;
a circulation pipe joint 26 connected to the inner surface of the plug 22;
And a steel ball 24 which is positioned inside the plug 22 and has a diameter larger than the inner diameter of the circulation pipe joint 26.
A first through hole X1 is provided at a position above the sealing assembly on the circulation joint 7, a second through hole X2 is provided at a position between the inner splitter cylinder 18 and the outer splitter cylinder 17 at the lower part of the sealing assembly, a third through hole X3, a fourth through hole X4 and a fifth through hole X5 are correspondingly provided at the lower part of the central tube 8, the upper part of the inner splitter cylinder 18 and the outer splitter cylinder 17, and a sixth through hole X6 and a seventh through hole X7 are provided at corresponding positions of the lower part of the inner splitter cylinder 18 and the upper part of the plug 22.
the gravel packing tool further comprises: and the plugging sleeve 20 is positioned in the third annular space Y3 and can move up and down to open or plug the third through hole X3 and the fourth through hole X4.
In the gravel packing tool provided by the embodiment of the invention, an annular space between the gravel packing tool and a sidetrack well casing is sealed by a packing cup in a sealing assembly. And, the outer diameter of the upper portion of the cup is smaller than that of the lower portion, and those skilled in the art will understand that the lower portion of the cup is in close contact with the inner wall of the casing. By adopting the design, when fluid flows from top to bottom in the sleeve, the outer diameter of the leather cup is compressed under the action of pressure, so that the fluid passes through the leather cup; when the fluid in the sleeve flows from bottom to top, the fluid can not pass through because the lower part of the leather cup is tightly contacted with the inner wall of the sleeve.
meanwhile, in the gravel packing tool, through holes for passing through fluid are respectively formed in the corresponding positions of the circulating joint 7, the central pipe 8, the sealing assembly, the inner shunt fluid cylinder 18, the outer internal fluid cylinder 17 and the plug 22, so that operations such as extrusion packing, circulating packing, well washing and the like are realized. Specifically, the method comprises the following steps:
referring to fig. 2, a first through hole X1 is provided on the circulation joint 7 at a position above the seal assembly (i.e., at the upper portion of the circulation joint 7) to communicate the first annular space Y1 with the sleeve.
referring to fig. 3, a second through hole X2 is provided in the lower portion of the seal assembly at a position between the split fluid inner cylinder 18 and the split fluid outer cylinder 17, communicating the first annular space Y1 with the second annular space Y2.
the third through hole X3 communicates the inside of the center tube 8 with the first annular space Y1, the fourth through hole X4 communicates the second annular space Y2 with the third annular space Y3, the fifth through hole X5 communicates the second annular space Y2 with the jacket tube, and since the third through hole X3, the fourth through hole X4 and the fifth through hole X5 are located correspondingly, the inside of the center tube 8 communicates with the jacket tube.
The sixth through hole X6 communicates the second annular space Y2 with the third annular space Y3, the seventh through hole X7 communicates the third annular space Y3 with the inside of the center tube 8, and the inside of the center tube 8 communicates with the second annular space Y2 through the sixth through hole X6 and the seventh through hole X7.
the inner diameter of the circulating pipe joint 26 is smaller than the outer diameter of the steel ball 24, so that the steel ball 24 is limited, when fluid flows from top to bottom in the central pipe 8, the fluid cannot continuously flow downwards due to the blockage of the steel ball 24, and the fluid passes through the third through hole X3 at the lower part of the central pipe 8. When the fluid flows from the bottom to the top of the circulation pipe joint 26, the steel ball 24 is jacked up, and the fluid can continue to move upwards and pass through the seventh through hole X7 on the upper part of the plug 22.
based on the above, the gravel packing tool provided by the embodiment of the invention has the working principle that:
(1) entering: and connecting the upper joint 1 with an oil pipe, connecting the lower joint 25 with a sieve pipe, and putting the gravel packing tool into a lateral drilling casing according to the requirements of the operation rules of downhole operation.
(2) extrusion filling: and after the gravel packing tool is lowered to a preset position, closing the sleeve valve, and pumping the sand-carrying fluid and gravel from the oil pipe. The sand-carrying fluid and gravel enter the central tube 8 after passing through the upper joint 1 and continue to flow downwards along the central tube 8, and when the sand-carrying fluid and gravel flow through the third through hole X3 at the lower part of the central tube 8, the sand-carrying fluid and gravel enter the casing after passing through the third through hole X3, the fourth through hole X4 and the fifth through hole X5, and the sand-carrying fluid and gravel are extruded and filled in the stratum.
(3) and (3) circulating filling: after extrusion filling is finished, a sleeve valve is opened, sand-carrying liquid is pumped from the oil pipe, enters the central pipe 8 from the upper joint 1, and enters the sleeve after passing through a third through hole X3, a fourth through hole X4 and a fifth through hole X5; after entering the casing, the sand-carrying liquid continuously flows to the sieve tube, enters the sieve tube from the gap on the wall of the sieve tube, enters the circulating pipe joint 26, jacks up the steel balls 24 and then continuously flows upwards. When passing through the seventh through hole X7 at the lower part of the plug 22, the gas enters a third annular space Y3 between the splitter inner cylinder 18 and the central tube 8 and the plug 22 through the seventh through hole X7. And the plugging sleeve 20 is pushed to move upwards to plug the third through hole X3 and the fourth through hole X4, so that the sand-carrying liquid can only enter a second annular space Y2 which is positioned at the lower parts of the shunt outer cylinder 17, the shunt inner cylinder 18 and the sealing assembly through a sixth through hole X6 at the lower part of the shunt inner cylinder 18, and enters a first annular space Y1 which is positioned between the central pipe 8 and the circulating joint 7 through the second through hole X2, and then enters the sleeve through a first through hole X1 and a first annular space Y1, and finally returns out, and the circulation is carried out in such a way to circularly fill the annular space of the screen sleeve.
(4) Well flushing: after the circulation is filled, the flushing fluid is pumped from the casing, when the flushing fluid flows downwards through the leather cup of the sealing assembly, the pressure is applied to the leather cup of the sealing assembly to reduce the outer diameter of the leather cup, so that the flushing fluid continuously flows downwards through the sealing assembly, and when the flushing fluid passes through the fifth through hole X5 on the shunt outer barrel 17, the flushing fluid enters the central pipe 8 through the fifth through hole X5, the fourth through hole X4 and the third through hole X3, then enters the oil pipe, finally returns out through the oil pipe, and the excess gravel in the oil pipe is backwashed.
(5) releasing: and after the well washing is finished, separating the upper joint 1 from the lock sleeve 6 to finish releasing.
In an embodiment of the present invention, the fourth through hole X4 and the fifth through hole X5 may be disposed as slant holes, that is, the included angle between the axis of the fourth through hole X4 and the axis of the fifth through hole X5 and the axis of the gravel packing tool is less than 90 ° (e.g., 30 °, 45 °, etc.), so as to facilitate the passage of the fluid.
further, referring to fig. 1 in conjunction with fig. 2 and 3, in a specific implementation of an embodiment of the invention, a seal assembly includes: the upper leather bowl seat 9, the upper leather bowl 10, the upper leather bowl pressing cap 11, the lower leather bowl seat 12, the lower leather bowl 13 and the lower leather bowl pressing cap 14 are sequentially sleeved outside the circulating joint 7 from top to bottom and mutually limited and fixed.
specifically, the upper part of the upper leather bowl seat 9 is limited and fixed by a limit step on the outer surface of the circulation joint 7. The upper part of the lower leather cup pressing cap 14 is connected with the lower part of the circulating joint 7, and the lower part of the lower leather cup pressing cap 14 is sealed with the central pipe 8. The lower part of the upper leather bowl seat 9 limits the upper leather bowl 10, the upper part of the upper leather bowl press cap 11 limits and fixes the upper leather bowl 10, and the lower part of the upper leather bowl press cap 11 limits and fixes the lower leather bowl seat 12; the lower leather cup 13 is arranged at the lower part of the lower leather cup seat 12 and is limited and fixed through a lower leather cup pressing cap 14.
Correspondingly, the upper part of the inner shunting body barrel 18 is connected with the lower part of the lower leather cup pressing cap 14; the upper part of the outer shunt cylinder 17 is sealed with the lower part of the lower leather cup pressing cap 14; the second annular space Y2 is located between the outer splitter cylinder 17 and the inner splitter cylinder 18 and the lower portion of the lower cup pressure cap 14; a first through hole X1 is provided on the circulation joint 7 at a position above the epithelial bowl 9.
Referring to fig. 2, in the embodiment of the present invention, the upper end of the upper leather bowl 9 should be spaced from the lower end of the lock sleeve 6 by a certain distance so as to provide the first through hole X1.
Referring to fig. 3, in an alternative embodiment of the present invention, the outer surface of the center tube 8 is flush with the outer surface of the plug 22, and the outer surface of the lower leather cup pressure cap 14 is flush with the outer surface of the diverter inner barrel 18 to increase the respective first annular space Y1 and second annular space Y2.
It will be appreciated by those skilled in the art that the seal assembly may also include more cups, e.g., 3, 4, etc. Each leather cup is limited and fixed through a leather cup seat positioned on the upper part of the leather cup and a leather cup pressing cap positioned on the lower part of the leather cup, and the leather cup pressing cap positioned on the leather cup above and the leather cup seat positioned on the leather cup below are mutually limited and fixed. The cup pressing cap of the lowermost cup is connected with the circulation joint 7 and is sealed with the central tube 8.
Further, in the gravel packing tool provided by the embodiment of the present invention, the central pipe 8 has a limiting step for limiting the upper portion of the plugging sleeve 20.
Further, the gravel packing tool according to the embodiment of the present invention further includes a spring 21 disposed in the third annular space Y3, an upper end of the spring 21 is connected to the plugging sleeve 20, and a lower end of the spring 21 is connected to the lower connector 25. When fluid enters the third annular space Y3 from the seventh through hole X7 on the plug 22 and pushes the plugging sleeve 20 to move upwards, the spring 21 is stretched; when the spring 21 is reset, the plugging sleeve 20 is driven to move downwards, so that the third through hole X3 and the fourth through hole X4 are reopened.
Further, referring to fig. 1 in conjunction with fig. 2, in a specific implementation of an embodiment of the invention, the gravel packing tool further comprises: a sliding sleeve 3 positioned inside the upper joint 1; the sliding sleeve 3 is fixed with the upper joint through a shear pin 4; the lock sleeve 6 is connected with the upper joint 1 through the lock block 5; the sliding sleeve 3 limits the locking block 5; when the sliding sleeve 3 moves downwards, the locking block 5 can be released. Based on this, the specific process of releasing operation of gravel packing provided by the embodiment of the invention is as follows: a steel ball with the outer diameter larger than the inner diameter of the sliding sleeve 3 is thrown into an oil pipe, the steel ball enters the upper connector 1 and then is clamped at the upper part of the sliding sleeve 3, when the oil pipe is pressed to a certain value (for example, 15MPa), the sliding sleeve 3 moves downwards, the shear pin 4 is cut off, and meanwhile, the locking block 5 is released, so that the upper connector 1 is separated from the locking sleeve 6, and the releasing is realized.
further, in the embodiment of the present invention, the sliding sleeve 3, the upper joint 1 and the central tube 8 are coaxial; the plugging sleeve 20, the inner shunt cylinder 18 and the lower joint 25 are coaxial.
further, referring to fig. 1 in combination with fig. 2 and fig. 3, in the embodiment of the present invention, the outer surface of the sliding sleeve 3 and the inner surface of the upper joint 1 are sealed by the first sealing ring 2; the outer surface of the lower leather cup pressing cap 14 and the inner surface of the outer barrel 17 of the shunt body are sealed through a second sealing ring 15; the inner surface of the lower leather cup pressing cap 14 and the outer surface of the central tube 8 are sealed by a third sealing ring 16; the inner surface of the plugging sleeve 20 and the outer surface of the central tube 8 are sealed by a fourth sealing ring 19; the inner surface of the lower joint 25 and the outer surface of the plug 22 are sealed by a fifth sealing ring 23.
further, in the embodiment of the present invention, the central pipe 8 and the upper joint 1, the central pipe 8 and the plug 22, the circulation joint 7 and the lock sleeve 6, the circulation joint 7 and the lower cup pressing cap 14, the lower cup pressing cap 14 and the inner shunting body barrel 18, the plug 22 and the circulation pipe joint 26, and the lower joint 25 and the inner shunting body barrel 18 are all connected by threads. The inner splitter cylinder 18 and the outer splitter cylinder 17 are connected by welding.
wherein, circulation connects 7 and lock tube 6 between through left-hand thread threaded connection, simultaneously, also through left-hand thread threaded connection between top connection 1 and the circulation connects 7. That is, the inner and outer surfaces of the upper portion of the circulation joint 7 are respectively connected with the upper joint 1 and the lock sleeve 6 through the back-off screw thread.
Further, in the present embodiment, the upper leather cup 10 and the lower leather cup 13 are molded by rubber vulcanization.
In summary, the embodiment of the invention optimizes and improves the structure and the connection relationship of each part of the gravel packing tool, so that the gravel packing tool can complete the steps required in mechanical sand control operations such as extrusion packing, circular packing, well washing, releasing and the like, and meanwhile, the structure of the gravel packing tool is more compact, and the outer diameter size of the gravel packing tool is greatly reduced. The gravel packing tool provided by the embodiment of the invention has the outer diameter of 76mm, can be put into a sidetracked well and performs sand prevention operation on the sidetracked well, thereby ensuring the normal production of the sidetracked well. The gravel packing tool provided by the embodiment of the invention can ensure a larger inner drift diameter while reducing the outer diameter, and can meet the requirement of large pressure difference production.
the above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. a gravel packing tool for sand control in a sidetracking machine, comprising:
the upper joint is used for being connected with an oil pipe;
The lock sleeve is sleeved outside the upper joint and is connected with the upper joint in a separable mode;
The circulating joint is connected with the lower part of the lock sleeve;
the central pipe is positioned inside the circulating joint, is connected with the lower part of the upper joint and has a first annular space with the circulating joint;
The sealing assembly is sleeved outside the circulating joint; and the lower portion of the seal assembly is sealed to the center tube; the sealing assembly comprises a leather cup, and the outer diameter of the upper part of the leather cup is smaller than that of the lower part of the leather cup;
The inner shunting body cylinder is connected with the lower part of the sealing component;
The outer shunting body cylinder is sleeved outside the inner shunting body cylinder, and a second annular space is formed between the outer shunting body cylinder and the lower parts of the inner shunting body cylinder and the sealing component; the upper part of the outer shunting body cylinder is sealed with the lower part of the sealing component and is higher than the upper part of the inner shunting body cylinder;
The plug is connected with the lower part of the central pipe, and a third annular space is formed among the inner splitter cylinder, the central pipe and the plug;
the inner surface of the lower joint is sealed with the outer surface of the plug, and the outer surface of the lower joint is connected with the inner surface of the lower part of the inner barrel of the shunt body;
The circulating pipe joint is connected with the inner surface of the plug;
The steel ball is positioned in the plug and has a diameter larger than the inner diameter of the circulating pipe joint;
A first through hole is formed in the position, above the sealing assembly, of the circulating joint, a second through hole is formed in the position, between the inner shunting body cylinder and the outer shunting body cylinder, of the lower portion of the sealing assembly, a third through hole, a fourth through hole and a fifth through hole are correspondingly formed in the lower portion of the central tube, the upper portion of the inner shunting body cylinder and the outer shunting body cylinder, and a sixth through hole and a seventh through hole are formed in the corresponding positions of the lower portion of the inner shunting body cylinder and the upper portion of the plug;
The gravel packing tool further comprises: and the plugging sleeve is positioned in the third annular space and can move up and down to open or plug the third through hole and the fourth through hole.
2. The gravel pack tool of claim 1, wherein the seal assembly comprises: the upper leather cup seat, the upper leather cup pressing cap, the lower leather cup seat, the lower leather cup and the lower leather cup pressing cap are sequentially sleeved outside the circulating joint from top to bottom and are mutually limited and fixed;
the upper part of the upper leather cup seat is limited and fixed through a limiting step on the outer surface of the circulating joint, the upper part of the lower leather cup pressing cap is connected with the lower part of the circulating joint, and the lower part of the lower leather cup pressing cap is sealed with the central pipe;
The upper part of the inner shunt body cylinder is connected with the lower part of the lower leather cup pressing cap;
The upper part of the outer shunt body cylinder is sealed with the lower part of the lower leather cup pressing cap;
the second annular space is positioned between the outer splitter cylinder and the inner splitter cylinder and between the second annular space and the lower part of the lower leather cup pressing cap;
The first through-hole is disposed on the circulation joint at a location above the epithelial bowl.
3. the gravel pack tool of claim 1, wherein the base pipe has a stop step thereon for stopping an upper portion of the plugging sleeve.
4. The gravel packing tool of claim 3, further comprising a spring positioned within the third annular space, an upper end of the spring being connected to the plugging sleeve and a lower end of the spring being connected to the lower joint.
5. The gravel packing tool of claim 2, further comprising:
The sliding sleeve is positioned inside the upper joint; the sliding sleeve is fixed with the upper joint through shear pins;
the lock sleeve is connected with the upper joint through a lock block;
the sliding sleeve limits the locking block;
when the sliding sleeve moves downwards, the locking block can be released.
6. The gravel pack tool of claim 5, wherein the sliding sleeve, the upper joint, and the base pipe are coaxial; the plugging sleeve, the inner shunt cylinder and the lower connector are coaxial.
7. the gravel packing tool of claim 5 or 6, wherein the sliding sleeve outer surface and the upper joint inner surface are sealed by a first sealing ring;
The outer surface of the lower leather cup pressing cap and the inner surface of the outer barrel of the shunt body are sealed through a second sealing ring;
The inner surface of the lower leather cup pressing cap and the outer surface of the central pipe are sealed through a third sealing ring;
the inner surface of the plugging sleeve and the outer surface of the central pipe are sealed through a fourth sealing ring;
And the inner surface of the lower joint and the outer surface of the pipe plug are sealed through a fifth sealing ring.
8. The gravel pack tool of claim 2, wherein the threaded connections are made between the base pipe and the upper joint, between the base pipe and the plug, between the circulation joint and the lock sleeve, between the circulation joint and the lower cup pressure cap, between the lower cup pressure cap and the diverter inner barrel, between the plug and the circulation joint, and between the lower joint and the diverter inner barrel.
9. the gravel pack tool of claim 8, wherein the circulation joint is connected to the lock sleeve by a reverse thread connection, and the top joint is connected to the circulation joint by a reverse thread connection.
10. The gravel pack tool of claim 2, wherein the upper and lower cups are formed by rubber vulcanization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219802.7A CN108240204B (en) | 2016-12-26 | 2016-12-26 | Gravel packing tool for sand control of sidetracking drilling machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611219802.7A CN108240204B (en) | 2016-12-26 | 2016-12-26 | Gravel packing tool for sand control of sidetracking drilling machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108240204A CN108240204A (en) | 2018-07-03 |
| CN108240204B true CN108240204B (en) | 2019-12-10 |
Family
ID=62702078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611219802.7A Active CN108240204B (en) | 2016-12-26 | 2016-12-26 | Gravel packing tool for sand control of sidetracking drilling machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108240204B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517408U (en) * | 2009-10-23 | 2010-06-30 | 东营市金山石油机械制造有限公司 | Slim-hole gravel stone filling sand control device |
| CN101832121A (en) * | 2010-05-24 | 2010-09-15 | 大港油田集团有限责任公司 | Horizontal well circulating gravel packing sand retention device |
| CN202560183U (en) * | 2012-05-21 | 2012-11-28 | 中国石油天然气股份有限公司 | Horizontal well gravel packing tool |
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN205349284U (en) * | 2015-12-25 | 2016-06-29 | 天津大港油田石油工程研究院钻采技术开发公司 | Sidetracked hole for sand control washable well give up and fill device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9388661B2 (en) * | 2012-07-31 | 2016-07-12 | Schlumberger Technology Corporation | Methods and systems for treating a wellbore |
-
2016
- 2016-12-26 CN CN201611219802.7A patent/CN108240204B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517408U (en) * | 2009-10-23 | 2010-06-30 | 东营市金山石油机械制造有限公司 | Slim-hole gravel stone filling sand control device |
| CN101832121A (en) * | 2010-05-24 | 2010-09-15 | 大港油田集团有限责任公司 | Horizontal well circulating gravel packing sand retention device |
| CN202560183U (en) * | 2012-05-21 | 2012-11-28 | 中国石油天然气股份有限公司 | Horizontal well gravel packing tool |
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN205349284U (en) * | 2015-12-25 | 2016-06-29 | 天津大港油田石油工程研究院钻采技术开发公司 | Sidetracked hole for sand control washable well give up and fill device |
Non-Patent Citations (1)
| Title |
|---|
| HSS－150水平井卡瓦式高压充填工具的研制;吴建平;《石油机械》;20111110;第38卷(第11期);第54-56页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108240204A (en) | 2018-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108386160B (en) | Blockage removal type sand prevention pipe column structure capable of flushing lower sieve pipe of pump | |
| CN104963652A (en) | Self-sealing compressed packer | |
| CN112177575B (en) | Sand mould-proof hydraulic layer-changing exploitation pipe column and use method thereof | |
| WO2011160193A1 (en) | Inflatable packer and control valve | |
| CN108240204B (en) | Gravel packing tool for sand control of sidetracking drilling machinery | |
| CN114508326A (en) | Sand control well completion integration packing and filling instrument | |
| CN112343540A (en) | Packing type staged cementing device, well cementation pipe column and well cementation method | |
| CN103422846A (en) | Open hole horizontal well completion fracturing integrated pipe column | |
| CN106014355A (en) | Downhole tool for changing downhole oil nozzle size through wellhead pressurization | |
| CN206830131U (en) | Sand setting constant pressure check valve for water injection well | |
| CN220434682U (en) | Multifunctional underground flushing nipple | |
| CN114508327B (en) | Sieve tube with sliding sleeve suitable for bottom fracturing filling process | |
| CN204252930U (en) | Fracturing packer | |
| CN216008449U (en) | Ball valve type hydraulic control environment-friendly blowout preventer on pump for down-hole oil pipe | |
| CN204186324U (en) | A kind of drilling rod sand prevention bypass valve | |
| CN109779580B (en) | Double-layer bidirectional filling device for layered oil extraction | |
| CN101881142B (en) | Self-sealing setting ball seat | |
| CN103510911B (en) | Shaft bottom leakage-proof plugging system and the method using this system to cement the well | |
| CN111502608B (en) | Preset underground filter and water filtering method | |
| CN111980636B (en) | Gravel filling device and method for sand prevention of oil layer | |
| CN111927404B (en) | Gravel packing tool capable of being used while being flushed | |
| CN110735619A (en) | Independent -layer extrusion filling pipe column in multiple oil layers | |
| CN220504986U (en) | Top drive internal blowout preventer switching device | |
| CN107762459B (en) | Separate-layer water injection pipe column | |
| CN111706304A (en) | Filling tool with reverse circulation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |