CN114059938B - Underground cable shearing device with energy storage power - Google Patents
Underground cable shearing device with energy storage power Download PDFInfo
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- CN114059938B CN114059938B CN202111491034.1A CN202111491034A CN114059938B CN 114059938 B CN114059938 B CN 114059938B CN 202111491034 A CN202111491034 A CN 202111491034A CN 114059938 B CN114059938 B CN 114059938B
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- 238000010008 shearing Methods 0.000 title claims abstract description 68
- 238000004146 energy storage Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 50
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 230000009471 action Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims 1
- 230000016507 interphase Effects 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 9
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 9
- 241001330002 Bambuseae Species 0.000 abstract description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 9
- 239000011425 bamboo Substances 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 230000033001 locomotion Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model provides a cable shearing mechanism in pit with energy storage power, including top connection, striking stick, the change over seat, the transmission cover, the slip seat, split slips, the core axostylus axostyle, the cutter seat, the lower clutch, the cutting blade, dish spring group, the slips spring, card tile section of thick bamboo and dish spring section of thick bamboo, the contact surface between striking stick and the change over seat is spiral inclined plane, vertical notch and L-shaped slot have been seted up to the transmission cover upper end at the change over seat lower extreme, inside holding has the slip seat, split slips and slips spring, the core axostylus axostyle upper end is connected at the transmission cover lower extreme, dish spring group is put on the core axostylus axostyle, the cutter seat sets up in the expanding appearance chamber that the lower clutch was seted up, the cutter blade articulates on the cutter seat and is originally spacing by elastic structure spare, the device utilizes dish spring group to predetermine the instantaneous release of shearing energy, cut off the cable with high impact strength's shearing force, the release of chucking energy is predetermine through the slips spring before the shearing, fixed cable, supplementary shearing in the pit, reliability and work efficiency of cable shearing construction can be improved.
Description
Technical Field
The invention relates to an underground cable shearing device, in particular to an underground cable shearing device with energy storage power.
Background
In the logging or testing process of an oilfield production well, when a downhole instrument is blocked and blocked, in order to avoid adverse effects of a downhole cable on salvaging the downhole instrument, a cable shearing device is needed to shear the cable at the blocking point of the downhole instrument under certain conditions, and then the cable is lifted to a wellhead. The logging cable shearing device currently used in production depends on auxiliary tubular columns such as a drill rod, an oil pipe, a continuous oil pipe and the like to operate, or pulls the cable through a wellhead, pulls a shearing knife in the shearing device to turn over to complete shearing action, or pushes down the tubular column through the wellhead, and the top of the fish is forced to the pup joint to complete shearing action. However, the action mode of implementing shearing based on the wellhead pulling cable or the pipe column is not practical in the case that the logging instrument is completely buried, the headstock weak point cannot play a role in protection and a drilling tool is not provided for the derrick, and in the case that a cable and a drill rod are adhered due to storage logging instrument and explosion cutting failure in underground use, the drilling tool water hole cannot be put into the pipe column for auxiliary cutting, and the logging cable shearing device adopts a static shearing structure without impact momentum, so that the shearing efficiency is low, the pulling load is higher, the lifting load is influenced by the dead weight of the cable, the cable wellhead is broken due to the fact that the cable bearing load is possibly exceeded sometimes, and when the underground cable has local defects, the cable is broken at unexpected positions, so that the cable falls into the well to form residues, cable shearing accidents are caused, and quite adverse effects and unnecessary economic losses are brought to the production of the oil field. Therefore, the logging cable shearing device in the prior art is necessary to be researched and improved, a functional route is innovated, the product structure is optimized, the shearing device without the assistance of a drill rod or an oil pipe is developed, the application range is expanded, the shearing effect is enhanced, and the construction efficiency is improved.
Disclosure of Invention
The invention aims to provide an underground cable shearing device with energy storage power, which changes the power action mode of underground cable shearing, does not need drill rods or oil pipes for assistance, enlarges the applicable well condition range and improves the reliability and the working efficiency of underground cable shearing construction.
A downhole wireline shearing device with stored energy power, comprising: the upper joint, the striking rod, the conversion seat, the transmission sleeve, the slip seat, the split slip, the core shaft rod, the cutter seat, the lower joint, the cutting blade, the disc spring group, the slip spring, and the tile clamping cylinder and the disc spring cylinder which are combined to form the outer cylinder body.
Based on assembly process requirements, the slip cylinder and the disc spring cylinder are connected up and down to form a split outer cylinder body, 2 slip limiting grooves are radially and symmetrically formed in the side wall of the slip cylinder, the slip limiting grooves are axially arranged in a strip shape, the upper connector is connected to the upper end of the slip cylinder, the lower connector is connected to the lower end of the disc spring cylinder, the striking rod, the conversion seat, the transmission sleeve, the core shaft rod and the cutter seat are sequentially connected from top to bottom and arranged in the outer cylinder body, and cable guide holes which are mutually connected and communicated are respectively formed in the central axes of the upper connector, the striking rod, the conversion seat, the transmission sleeve, the core shaft rod, the cutter seat and the lower connector.
The contact surface between the striking stick with the conversion seat is mutually supporting spiral inclined plane, the mutual dislocation cooperation contact between the spiral inclined plane has certain axial dislocation height H, the axial spacing groove has been seted up on the striking stick lateral wall, the spacing groove corresponds the cooperation with fixed mounting the spacing nail of card tile section of thick bamboo, restriction the circumferential rotation of striking stick, guide the axial motion of striking stick.
The transmission sleeve is a cylindrical sleeve body, the upper end of the transmission sleeve is fixedly connected with the lower end of the conversion seat, 2 vertical slots which are radially symmetrical are formed in the side wall of the transmission sleeve, L-shaped slots which are radially symmetrical in2 positions are formed in the position which is arranged between the two vertical slots, the L-shaped slots are mutually corresponding to the arrangement positions of slip limiting grooves on the slip sleeve, the slip seat, the opposite slips and the slip springs are sequentially contained in the transmission sleeve from bottom to top, 2 outer conical surfaces are radially symmetrical on the outer circumference, the outer conical surfaces respectively penetrate through the vertical slots formed in the corresponding sides of the transmission sleeve and are respectively connected with the slip sleeve, the slip seat is fixed on the slip sleeve, the vertical slots are kept to have a certain opening width, so that the transmission sleeve is provided with a rotatable angle a relative to the slip seat, the opposite slips are cylindrical structures formed by combining 2 arc-shaped pieces, 2 radial symmetrical pins are arranged on the outer circumference, the opposite slips are respectively matched with the corresponding positions of the slip sleeve, the L-shaped slots can be inserted into the corresponding positions of the slip sleeve, the L-shaped slots can be restrained by the corresponding to the corresponding positions of the slip sleeve, the L-shaped slots can be simultaneously, the transmission sleeve is limited by the axial limiting grooves are correspondingly arranged in the axial limiting position which is correspondingly arranged in the slip sleeve, the outer conical surface is correspondingly matched with the inner conical surface on the slip seat in a structure, the slip spring is arranged between the conversion seat and the split slips, the slip spring is initially preset to be in a compressed energy storage state, primary energy storage power for clamping the cable to assist in shearing is established, and the split slips are pushed into the slip seat under the action of the slip spring.
The upper end of the mandrel rod is limited and connected with the lower end of the transmission sleeve and extends downwards into the disc spring barrel, so that the mandrel rod can rotate together with the transmission sleeve, meanwhile, the degree of freedom of axial movement relative to the transmission sleeve is reserved, a double-lug boss is arranged at the lower end of the mandrel rod, a slotted shoulder matched with the double-lug boss structure is arranged at a corresponding position of the disc spring barrel, the double-lug boss can be selectively supported on the shoulder surface of the slotted shoulder in a protruding double-lug mode through forming a protruding double-lug fit, or the protruding double-lug fit stretches into the structural fit in a notch formed in the slotted shoulder, the disc spring assembly is sleeved on a rod body of the mandrel rod, meanwhile, the disc spring assembly is supported between the mandrel rod and the slip barrel, elastic acting force is applied to the mandrel rod, the disc spring assembly is initially preset to be in a compressed energy storage state, and secondary energy storage power of a shearing cable is established.
The inside of lower clutch has offered the hole enlargement and has held the chamber, the cutter seat sets up in the hole enlargement holds the chamber, 1 ~ 2 cutter blade cutting edge inwards, articulated respectively install on the cutter seat and by the initial spacing of elastic structure spare, have with the articulated shaft as the center orientation the rotational freedom of lower clutch central axis, the back side is the bearing surface, works as when second grade energy storage power release, the dabber pole obtains instantaneous impact momentum, through the dabber pole with the cutter seat with the structure cooperation of lower clutch makes impact momentum acts on the bearing surface of cutter blade back side promotes cutter blade rotatory adduction or cooperation rotatory adduction realize cutting or shearing to the cable in the pit.
The underground cable shearing device with energy storage power is characterized in that when an acting force with impact momentum is applied to the impact rod, the impact rod interacts with the conversion seat, mechanical energy is transmitted to the conversion seat, and the linear motion of the impact rod is converted into rotary motion of the conversion seat; further, the conversion seat drives the transmission sleeve and the mandrel rod which are connected with the conversion seat in sequence to rotate together, and the rotation of the transmission sleeve and the split slips generate relative rotation movement due to the fact that the arc-shaped clamping tiles of the split slips are limited by the rotation of the slip barrel; when the rotation reaches the preset clamping angle, the slip pins respectively pre-arranged on the high-position limiting platforms in the L-shaped slotted holes are pushed into the low-position limiting platforms, so that the primary energy storage power in the slip springs is released, the split slips are pushed and released to the low-position under the preset elastic force of the slip springs, and in the downward movement process, the inner conical surface on the slip seat acts on the split slips, so that 2 arc slip sheets of the split slips are retracted to form a closed clamping state; when the disc spring set is continuously rotated to reach a shearing preset angle, the preset state on the mandrel rod is matched with the double-lug boss supported on the slotted shoulder surface on the disc spring barrel, the preset state is converted into a matched state that the convex double lugs on the double-lug boss are respectively correspondingly overlapped with the slots formed in the slotted shoulder, so that the secondary energy storage power in the disc spring set is released, under the pushing action of the preset elastic force of the disc spring set, the convex double lugs are matched and extend into the slots, the mandrel rod obtains instant impact momentum, and the impact momentum acts on the bearing curved surface on the back side of the cutter blade through the structural matching of the mandrel rod with the cutter blade seat and the lower connector, so that the cutter blade is pushed to be instantaneously rotated inwards or instantaneously matched with the cutter blade to be rotated inwards, and the dynamic cutting or shearing of the underground cable is realized.
The underground cable shearing device with energy storage power further comprises: the upper thrust bearing is arranged between the transmission sleeve and the slip barrel, and the lower thrust bearing is arranged between the disc spring group and the mandrel rod, so that friction resistance of the transmission sleeve and the mandrel rod is reduced, mechanical energy conversion efficiency is improved, and high efficiency, stability and reliability of system working and running are enhanced.
The underground cable shearing device with energy storage power is characterized in that a supporting spring is preferably arranged between the upper connector and the impact rod, the elastic force of the supporting spring acts on the impact rod, so that spiral inclined planes matched with each other between the impact rod and the conversion seat are in close fit contact, and momentum impact is generated between the spiral inclined planes due to the fact that gaps exist between the spiral inclined planes in the process of transmitting energy from the impact rod to the conversion seat, energy loss is generated, and the energy utilization rate and the transmission conversion efficiency of the energy utilization rate are reduced.
The underground cable shearing device with energy storage power is characterized in that a limiting connection mode of a rectangular pin groove structure is adopted between the mandrel rod and the transmission sleeve, a rectangular pin is arranged at the upper end of the mandrel rod, a rectangular groove corresponding to the rectangular pin structure is formed in the lower end of the transmission sleeve, the rectangular pin is connected with the rectangular groove in a matched mode, the mandrel rod is reserved when the transmission sleeve transmits torque to the mandrel rod, and the axial movement freedom degree of the mandrel rod relative to the transmission sleeve is reserved.
The beneficial effects of the invention are as follows: the underground cable shearing device with the energy storage power is provided, the traditional external power applying mode of the existing underground cable shearing device is changed, the cable is cut off by utilizing the instantaneous release of the preset shearing energy of the disc spring group and the instantaneous shearing force with high impact strength, the shearing effect is stable and reliable, the release of the preset clamping energy of the slip spring is used for fixing the cable before shearing, the cable is assisted in shearing, the shearing stability, reliability and shearing effect are further improved, the cable clamping and shearing are completed in the same operation action, and the shearing construction efficiency is quite outstanding; meanwhile, the device integrates clamping and shearing functions, is compact in design, high in integration level, does not need auxiliary operations such as a drill rod or an oil pipe in the use process, can complete shearing operation by conveying the device to a preset position along the cable and then conveying the weighting rod into the well along the cable by means of self gravity, is simple to operate and convenient to use, is wide in application well condition range, can not be influenced by underground environment and geological conditions in the whole operation process, ensures the reliability of underground cable shearing construction fully, and has higher working efficiency.
Drawings
FIG. 1 is a cross-sectional view of a dual bladed downhole cable shearing device with energy storage power according to example 1.
FIG. 2 is a cross-sectional view taken along section A-A in FIG. 1.
FIG. 3 is a cross-sectional view taken along section B-B in FIG. 1.
Fig. 4 is a half-section structural view of the dual-blade downhole cable shearing device with energy storage power of fig. 1 turned 90 degrees.
FIG. 5 is a cross-sectional view taken along section C-C of FIG. 4.
Fig. 6 is a schematic view of the opening position and the structure shape of the L-shaped slot hole on the transmission seat.
FIG. 7 is a cross-sectional view of a single blade downhole cable cutting device with stored energy according to example 2.
FIG. 8 is a sectional view of section D-D of FIG. 7.
Fig. 9 is a semi-sectional structural view of the single blade downhole cable cutting device of fig. 7 with stored energy power turned 90 degrees.
Wherein: the device comprises an upper joint 1, an impact rod 2, a conversion seat 3, a transmission sleeve 4, a slip seat 5, a split slip 6, a core shaft rod 7, a cutter holder 8, a lower joint 9, a cutting blade 10, a disc spring group 11, a slip spring 12, an upper thrust bearing 13, a lower thrust bearing 14, a clamp cylinder 15, a disc spring cylinder 16, a cutter spring 17, a support spring 18, a slip pin 19, a slip limit groove 20, a limit nail 21, an L-shaped slot 22, a connecting bolt 23, a connecting screw 24, a cutter torsion spring 25 and a cutter holder 26.
Detailed Description
The technical scheme of the invention claimed in the specification is further described below with reference to specific embodiments and attached drawings.
Example 1
The utility model provides a double blade underground cable shearing mechanism with energy storage power, as shown in fig. 1 to 5, comprises top connection 1, striking stick 2, conversion seat 3, drive sleeve 4, slips seat 5, split slips 6, dabber pole 7, cutter holder 8, lower clutch 9, cutter piece 10, dish spring group 11, slips spring 12, cutter spring 17, upper thrust bearing 13, lower thrust bearing 14, supporting spring 18, slips section of thick bamboo 15 and dish spring section of thick bamboo 16.
The slip cylinder 15 and the disc spring cylinder 16 are vertically connected to form an outer cylinder, 2 strip-shaped slip limiting grooves 20 are radially symmetrically formed in the side wall of the slip cylinder 15, the upper connector 1 is connected to the upper end of the slip cylinder 15, the lower connector 9 is connected to the lower end of the disc spring cylinder 16, the striking rod 2, the conversion seat 3, the transmission sleeve 4, the mandrel rod 7 and the cutter seat 8 are sequentially connected and arranged in the outer cylinder from top to bottom, and the upper connector 1, the striking rod 2, the conversion seat 3, the transmission sleeve 4, the mandrel rod 7, the cutter seat 8 and the axis of the lower connector 9 are respectively provided with mutually connected and communicated cable guide holes.
The contact surface between the striking stick 2 and the conversion seat 3 is mutually matched spiral inclined surfaces, the spiral inclined surfaces are mutually staggered and matched with each other to be contacted, the axial dislocation height H is kept to be 10 millimeters, a supporting spring 18 is arranged between the upper joint 1 and the striking stick 2, the elastic force of the supporting spring 18 acts on the striking stick 2 to enable the mutually matched spiral inclined surfaces to be matched and contacted more tightly, the outer side wall of the striking stick 2 is provided with an axial limiting groove, and the limiting groove is correspondingly matched with a limiting nail 21 on the slip barrel 15.
The transmission sleeve 4 is a cylindrical sleeve body, the upper end is fixedly connected with the lower end of the conversion seat 3 by using a connecting screw 24, 2 radial symmetrical vertical slots are formed in the side wall, the vertical slots are staggered by 90 degrees, L-shaped slot holes 22 are formed in the positions of 2 radial symmetrical slots, as shown in figure 5, the slip seat 5, the split slips 6 and the slip springs 12 are sequentially contained from bottom to top in the inside, an inner conical surface is arranged on the inner side of the slip seat 5, 2 outer convex supporting lugs are radially symmetrically arranged on the outer circumference, the outer convex supporting lugs respectively penetrate through vertical slots formed in the corresponding sides of the transmission sleeve 4, the transmission sleeve 4 is fixedly connected with the slip cylinder 15 by using connecting bolts 23, the maximum rotatable angle a of the transmission sleeve 4 relative to the slip seat 5 is 30 degrees, slip pin 19 is arranged on the outer circumference and is provided with 2 radial symmetrical slip pin grooves 19, the slip pin 19 respectively penetrates through the L-shaped slot 22 and is inserted into the corresponding slot 20 in the position, and the slip pin 19 is provided with a corresponding conical groove 6, and the slip pin 19 is provided with a cylindrical structure, and the slip pin 19 is provided with a corresponding to the inner conical groove 6, the slip seat is provided with a corresponding conical groove 6, and the inner conical groove is provided with a position between the slip seat and the slip seat 6 and the slip seat is provided with a corresponding conical groove 6.
The upper end of dabber pole 7 is provided with the rectangle round pin, the rectangle round pin with the rectangle groove cooperation limit connection that the transmission cover 4 lower extreme was seted up, the lower extreme of dabber pole 7 is provided with the ears boss, the corresponding position of dish spring section of thick bamboo 16 then be provided with ears boss structure complex fluting circular bead, dish spring group 11 cover is put on the body of rod of dabber pole 7, support simultaneously core pole 7 with between the slips section of thick bamboo 15 the lower extreme of dish spring group 11 with be provided with between dabber pole 7 thrust bearing 14 down.
The inside of the lower joint 9 is provided with an expanding cavity, the upper end of the expanding cavity is provided with an annular conical surface, the cutter spring 17 is arranged in the expanding cavity and supported at the bottom end of the cutter seat 8, so that the upper end of the cutter seat 8 is propped against the lower end of the mandrel rod 7 and is in stable contact connection with the mandrel rod 7, two radially symmetrical sides of the cutter seat 8 are respectively provided with a blade groove penetrating through the side wall, 2 cutter blades 10 are respectively embedded in2 blade grooves and are respectively hinged to the cutter seat 8 at the upper end, the lower ends are respectively provided with opposite blades, the blades can be matched with each other to form a shearing structure, the cutter blades 10 are matched with each other to rotate inwards to realize a dynamic shearing function between the blades by taking a hinge shaft as the center, the back side of each cutter blade 10 is respectively provided with an inclined surface, and the whole inclined surface is exposed out of the blade groove from the side surface of the mandrel rod 7, and is respectively matched with the annular conical surface on the lower joint 9; when the secondary energy storage power in the disc spring set 11 is released, the mandrel rod 7 overcomes the reaction force of the cutter spring 17 and pushes the cutter seat 8 to move downwards together, and in the moving process, the annular conical surface on the lower joint 9 acts on the inclined surface of the cutter blade 10, so that 2 cutter blades 10 respectively generate opposite rotating movements with the hinging shaft as the center of a circle, and the inner side cutting edges are correspondingly closed, thereby forming an instantaneous dynamic shearing state.
In the production well logging or testing process, when the underground instrument is blocked when the cable is needed to be cut off in the underground, the double-blade underground cable shearing device with energy storage power can be applied, and the specific operation method comprises the following steps: firstly, cutting a cable at a wellhead, enabling the cable end to pass through a cable guide hole between an upper connector 1 and a lower connector 9 of the double-blade underground cable cutting device with energy storage power, straightening the cable to enable the double-blade underground cable cutting device with energy storage power to slide down the underground along the cable until reaching the connecting end of the underground cable and a logging instrument, then, throwing a weighting rod down the cable to enable the weighting rod to strike an impact rod 2 at the upper end of the double-blade underground cable cutting device with energy storage power, sequentially releasing the energy storage power in a slip spring 12 and a disc spring group 11 through the transmission and conversion of impact mechanical energy to release the energy storage power to drive a split slip 6 to clamp the underground cable, and enabling a cutting blade 10 to cut the underground cable once.
Example 2
The utility model provides a single blade cable cutting equipment in pit with energy storage power, as shown in fig. 7,8 and 9, by top connection 1, striking stick 2, conversion seat 3, drive sleeve 4, slips seat 5, split slips 6, dabber pole 7, cutter blade holder 8, lower connection 9, cutter blade 10, dish spring group 11, slips spring 12, cutter torsional spring 25, upward thrust bearing 13, lower thrust bearing 14, supporting spring 18, slips section of thick bamboo 15, dish spring section of thick bamboo 16 and cutter frame 26 constitute.
Wherein: the structures of the upper joint 1, the striking rod 2, the conversion seat 3, the transmission sleeve 4, the slip seat 5, the split slips 6, the mandrel bar 7, the lower joint 9, the disc spring group 11, the slip springs 12, the upper thrust bearing 13, the lower thrust bearing 14, the support springs 18, the slip cylinder 15 and the disc spring cylinder 16 and the matching relationship therebetween are the same as those of the double-blade downhole cable shearing device with energy storage power in the embodiment 1.
The cutter frame 26 is inlaid on the lower end face of the mandrel rod 7, so that the structuring process of the mandrel rod is simplified, a cutter frame groove is formed in the inner ring face and can rotate relative to the mandrel rod 7, the cutter blade 10 is inlaid in the cutter frame groove formed in the cutter frame 26, the rotation track of the cutter blade 10 is limited, and the stability of movement is enhanced.
The inside of the lower joint 9 is provided with an expanding cavity, the cutter seat 8 is fixedly arranged in the expanding cavity in a bolt connection manner, the cutter blade 10 is hinged to the upper end of the cutter seat 8 at the lower end, the upper part is provided with an inward-facing cutting edge, the dynamic cutting function of the cutter blade 10 can be realized by taking a hinge shaft as a center to rotate inwards, the back side is provided with an arc-shaped curved surface, the cutter torsion spring 25 is arranged on the cutter seat 8, and the cutter blade 10 is initially limited, so that the arc-shaped curved surface of the back side of the cutter blade 10 is propped against the lower end of the mandrel rod 7 through the cutter frame 26; when the secondary energy storage power in the disc spring set 11 is released, the mandrel rod 7 overcomes the reaction force of the cutter torsion spring 25, the lower end acts on the arc-shaped curved surface of the back side of the cutter blade 10 through the cutter frame 26, and the cutter blade 10 is pushed to generate rotary motion towards the inner side by taking the hinge shaft as the center of a circle, so that an instantaneous dynamic cutting state is formed.
The operation method of the single-blade underground cable cutting device with energy storage power in the production well logging or testing process is the same as that of the embodiment 1, when the single-blade underground cable cutting device with energy storage power is sent to the connecting end of the cable and logging instrument, then a weighting rod is thrown into the underground along the cable to strike the striking rod 2, the energy storage power in the slip spring 12 and the disc spring group 11 is sequentially controlled and released through the transmission and conversion of impact mechanical energy, the split slips 6 are driven by the energy storage release power to clamp the underground cable, the cutter blade 10 performs instantaneous dynamic cutting, the clamping and cutting of the underground cable are completed once, auxiliary operation of a drill rod or an oil pipe is not needed, any other power is not needed to be applied to the wellhead, adverse effects on salvaging of the logging instrument due to underground cable residues are avoided, and the technical problem of underground cable shearing in the prior art is fundamentally solved.
Claims (6)
1. A downhole cable shearing apparatus with stored energy power, comprising: the device comprises an upper joint (1), an impact rod (2), a conversion seat (3), a transmission sleeve (4), a slip seat (5), a split slip (6), a mandrel rod (7), a cutter seat (8), a lower joint (9), a cutter blade (10), a disc spring group (11), a slip spring (12), a cutter spring (17) and a slip barrel (15) and a disc spring barrel (16) which are combined to form an outer barrel body;
The slip cylinder (15) and the disc spring cylinder (16) are connected up and down to form the split outer cylinder, 2 slip limiting grooves (20) are radially and symmetrically formed in the side wall of the slip cylinder (15), the slip limiting grooves (20) are axially arranged in a strip shape, the upper connector (1) is connected to the upper end of the clamp cylinder (15), the lower connector (9) is connected to the lower end of the disc spring cylinder (16), the impact rod (2), the conversion seat (3), the transmission sleeve (4), the mandrel rod (7) and the cutter seat (8) are sequentially connected from top to bottom and arranged in the outer cylinder, and the upper connector (1), the impact rod (2), the conversion seat (3), the transmission sleeve (4), the mandrel rod (7), the cutter seat (8) and the lower connector (9) are respectively provided with guide holes which are mutually connected and communicated;
the contact surface between the impact rod (2) and the conversion seat (3) is spiral inclined surfaces matched with each other, the spiral inclined surfaces are in staggered fit contact with each other and have an axial staggered height H, and an axial limiting groove is formed in the outer side wall of the impact rod (2);
The transmission sleeve (4) is a cylindrical sleeve body, the upper end of the transmission sleeve is fixedly connected with the lower end of the conversion seat (3), 2 radial symmetrical vertical slots are formed in the side wall of the transmission sleeve, 2 radial symmetrical L-shaped slots (22) are formed in the inter-phase positions of the vertical slots, the L-shaped slots (22) are mutually corresponding to the slip limiting grooves (20) in the slip barrel (15), the slip seat (5), the split slips (6) and the slip springs (12) are sequentially contained in the transmission sleeve from bottom to top, 2 outer protruding lugs are radially symmetrically arranged on the outer circumference of the slip seat (5), penetrate through the corresponding vertical slots formed in the transmission sleeve (4) and are respectively connected with the slip barrel (15), the slip seat (5) is fixed on the slip barrel (15), the transmission sleeve (4) has a rotatable angle a relative to the slip seat (5), the split slips (6) and the slip barrel (19) are correspondingly formed by inserting into the corresponding radial slots (19) formed in the slip seat (4) and are correspondingly provided with the corresponding radial slots (19) formed in the slip barrel (4), the lower end of the split slip (6) is provided with an outer conical surface which is correspondingly matched with an inner conical surface on the slip seat (5) in a structure, the slip spring (12) is arranged between the conversion seat (3) and the split slip (6), the initial preset is in a compressed energy storage state, and the split slip (6) is pushed into the slip seat (5) under the action of the slip spring (12);
The upper end of the mandrel rod (7) is in limit connection with the lower end of the transmission sleeve (4) and extends downwards into the disc spring barrel (16), a double-lug boss is arranged at the lower end, a slotted shoulder matched with the double-lug boss structure is arranged at a corresponding position of the disc spring barrel (16), the disc spring group (11) is sleeved on a rod body of the mandrel rod (7) and simultaneously supported between the mandrel rod (7) and the slip barrel (15), elastic acting force is applied to the mandrel rod (7), and the mandrel rod is initially preset to be in a compressed energy storage state;
The inside of lower joint (9) has offered the hole enlargement and has held the chamber, cutter seat (8) set up in the hole enlargement holds the chamber, 1~ 2 cutter blade (10) cutting edge inwards, the articulated installation respectively on cutter seat (8), have with articulated axle as the center orientation lower joint (9) central axis's rotation degree of freedom, the back side is the bearing curved surface.
2. A downhole cable shearing apparatus with energy storage power according to claim 1, wherein: the utility model provides a cutter, including cutter seat (8), cutter seat (10), cutter seat (8), cutter spring (17), lower joint (9) are last to be seted up the hole-expanding holds the chamber upper end is provided with annular conical surface, cutter spring (17) are placed in the hole-expanding holds the chamber, support the bottom of cutter seat (8) makes the upper end of cutter seat (8) support be in the lower extreme of dabber pole (7), with dabber pole (7) form stable contact connection, radial symmetry both sides have been seted up respectively on cutter seat (8) link up the blade groove of lateral wall, 2 blade cutter (10) are inlayed respectively in 2 in the blade groove and are articulated respectively in the upper end on cutter seat (8), 2 blade cutter seat (10)'s lower part respectively have the cutting edge that corresponds each other in opposite directions, the cooperation between cutting edges constitutes shearing structure, cutter seat (10) use the cooperation rotation of articulated shaft as the center can realize dynamic shearing function between the cutting edge, 2 blade (10) are provided with the inclined plane respectively on the back side, whole follow cutter seat (8) is in the side of blade groove and is in the annular contact respectively on the lower joint (9) is in the face of each other.
3. A downhole cable shearing apparatus with energy storage power according to claim 1, wherein: a cutter frame (26) is embedded on the lower end surface of the mandrel rod (7), the cutter frame (26) can rotate relative to the mandrel rod (7), a cutter frame groove is formed in the inner ring surface, and the cutter blade (10) is embedded in the cutter frame groove formed in the cutter frame (26) to limit the rotation track of the cutter blade (10);
Simultaneously, cutter seat (8) fixed mounting is in the hole-expanding holds the chamber, cutter piece (10) are in the lower extreme articulates cutter seat (8) upper end, upper portion have towards inboard cutting edge, use the articulated shaft as the inside rotatory realization of centre cutter piece (10) dynamic cutting function, the dorsal part is provided with the arc curved surface, cutter torsional spring (25) are installed on cutter seat (8), to cutter piece (10) are carried out initial spacing, make cutter piece (10) dorsal arc curved surface passes through cutter frame (26) butt is in the lower extreme of dabber pole (7).
4. A downhole cable shearing apparatus with energy storage power according to any of claims 1 to 3, further comprising: an upper thrust bearing (13) and a lower thrust bearing (14), wherein the upper thrust bearing (13) is arranged between the transmission sleeve (4) and the slip barrel (15), and the lower thrust bearing (14) is arranged between the disc spring set (11) and the mandrel rod (7).
5. A downhole cable shearing apparatus with energy storage power according to claim 4, a support spring (18) being arranged between said upper joint (1) and said impact rod (2).
6. A downhole cable shearing apparatus with energy storage power according to claim 5, wherein: the novel structure is characterized in that a limiting connection mode of a rectangular pin groove structure is adopted between the mandrel rod (7) and the transmission sleeve (4), a rectangular pin is arranged at the upper end of the mandrel rod (7), a rectangular groove which is correspondingly matched with the rectangular pin structure is formed in the lower end of the transmission sleeve (4), and the rectangular pin is matched and connected with the rectangular groove.
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| CN202111491034.1A CN114059938B (en) | 2021-12-09 | 2021-12-09 | Underground cable shearing device with energy storage power |
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| CN115012849B (en) * | 2022-07-01 | 2023-10-10 | 西南石油大学 | Longitudinal and torsional composite control variable diameter stabilizer |
| CN115559683B (en) * | 2022-12-08 | 2023-04-07 | 易初机械装备有限公司 | Logging cable sealing suspension system |
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