CN116291335A - Filling tool for sand prevention well completion - Google Patents
Filling tool for sand prevention well completion Download PDFInfo
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- CN116291335A CN116291335A CN202310576583.1A CN202310576583A CN116291335A CN 116291335 A CN116291335 A CN 116291335A CN 202310576583 A CN202310576583 A CN 202310576583A CN 116291335 A CN116291335 A CN 116291335A
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- sealing
- sliding
- connecting pipe
- fixedly connected
- hole
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- 239000004576 sand Substances 0.000 title claims abstract description 28
- 230000002265 prevention Effects 0.000 title abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 104
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 41
- 238000012856 packing Methods 0.000 claims description 20
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000011001 backwashing Methods 0.000 abstract description 4
- 239000003129 oil well Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- 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)
- Joints Allowing Movement (AREA)
Abstract
The invention relates to the technical field of underground filling tools, in particular to a filling tool for sand prevention well completion. The connecting pipe is fixedly connected with the upper joint, the lower portion of the connecting pipe is provided with a symmetrical first through hole, the lower end of the connecting pipe is fixedly connected with the lower joint, the connecting pipe is slidably connected with a ball seat, the lower portion of the ball seat is slidably connected with the lower joint, a first elastic piece is arranged in the lower joint, the lower portion of the connecting pipe is slidably connected with a sealing sleeve, the lower portion of the connecting pipe is sleeved with a second elastic piece, and two ends of the second elastic piece are fixedly connected with the sealing sleeve and the lower joint respectively. The sealing sleeve and the ball seat are used for sealing the first through hole, so that the first through hole is prevented from being blocked in the process of filling and descending the well, the stability of the filling tool is improved, the backwashing, setting and filling work can be completed by descending the well once by the filling tool, and meanwhile, after filling is finished, the filling tool can be timely put into a production state, the time of underground operation is saved, and the operation cost is reduced.
Description
Technical Field
The invention relates to the technical field of underground filling tools, in particular to a filling tool for sand prevention well completion.
Background
Whether the stratum is sanded depends on the stratum intensity, when the stratum stress exceeds the stratum intensity, sand is possibly produced, the sand production of an oil well can cause the reduction and the stop of the production of the oil well, and when serious, the oil well is scrapped, so that the gravel packing is the most widely used sand control technology at present. With further deepening of oil field development, the exploitation difficulty is continuously increased, and sand production of an oil well is gradually becoming a main problem in the oil field development and production process.
The success rate of the existing gravel packing is high, but the construction process of the gravel packing is complex, so that the gravel packing is not only required to be smoothly put down to a design position, but also procedures such as setting, releasing, packing, backwashing and the like are effectively completed in a muddy sand environment, and particularly, the pipe column is required to be lifted and put down for many times in the well cementation process, so that the whole well cementation construction process is complicated in steps, the construction time is prolonged, and a packing tool is required to be taken out from a casing after the construction is finished, and an oil pipe is required to be put down again, so that the production process of the whole oil well is greatly reduced.
Disclosure of Invention
In order to overcome the shortcomings of the existing gravel packs, the invention provides a packing tool for sand control completion.
The technical implementation scheme of the invention is as follows: the utility model provides a filling tool for sand control well completion, including the top connection, the top connection rigid coupling has the connecting pipe, the outside threaded connection of connecting pipe has the coupling shell, the upper portion of connecting pipe and coupling shell is provided with annular cavity, the lower part of connecting pipe is provided with symmetrical first through-hole, the lower extreme rigid coupling of connecting pipe has the lower clutch, the lower clutch is connected with the screen pipe, connecting pipe sliding connection has the ball seat that is used for sealed first through-hole, the lower part and the lower clutch sliding connection of ball seat, be provided with respectively with ball seat and lower clutch rigid coupling's first elastic component, the lower clutch rigid coupling has symmetrical and with ball seat spacing complex spacer pin, the ball seat is provided with the sealing ball, be provided with symmetrical L shape through-hole between connecting pipe and the coupling shell, sliding connection has the seal post in L shape through-hole, the lower part sliding connection of connecting pipe has the first through-hole of being used for sealing, the lower part cover of seal cover is equipped with the second elastic component, the both ends of second elastic component respectively with seal cover and lower clutch rigid coupling, through the pressure of change carrier fluid, and then make seal cover and ball seat synchronous release to first through-hole sealing, the top connection is provided with the subassembly that is used for increasing well flushing fluid pressure, the connecting pipe is provided with the seal assembly, and is provided with the seat.
Further, the second elastic piece is located the downside of seal cover, and the seal cover receives frictional force to upwards remove, guarantees the seal of seal cover to first through-hole, prevents that the connecting pipe from going into the well in-process seal cover from taking place to slide.
Further, the sand-carrying device comprises symmetrical filter screens, wherein the filter screens are arranged in adjacent L-shaped through holes and are used for filtering sand-carrying fluid.
Further, the recoil assembly comprises a sealing sliding sleeve, the sealing sliding sleeve is connected with an upper joint in a sliding manner, a third elastic piece is arranged in the upper joint, two ends of the third elastic piece are fixedly connected with the sealing sliding sleeve and the upper joint respectively, the upper joint is provided with second through holes with equal intervals in the circumferential direction, the sealing sliding sleeve is provided with third through holes with equal intervals in the circumferential direction, the lower part of the upper joint is provided with fourth through holes with equal intervals in the circumferential direction, and a supporting component is arranged in the fourth through holes and used for supporting the sealing sliding sleeve.
Further, the supporting part comprises a limiting ring, the limiting ring is fixedly connected to a fourth through hole, a first piston is slidably connected in the fourth through hole, a limiting rod is fixedly connected to the first piston, the limiting rod penetrates through the upper joint and is slidably connected with the upper joint, the limiting rod is used for limiting the sealing sliding sleeve, a fourth elastic piece is arranged in the fourth through hole, and two ends of the fourth elastic piece are fixedly connected to the adjacent first piston and the upper joint respectively.
Further, the setting assembly comprises a sliding ring, the upper joint is provided with an annular groove, the inner wall of the upper joint is provided with circumferential equidistant square grooves, the circumferential equidistant square grooves are communicated with the annular groove, the sliding ring is connected in the annular groove in a sliding manner, the sliding ring penetrates through a connecting pipe, an annular plate and a rubber sleeve are arranged on the connecting pipe sleeve, the rubber sleeve is positioned on the lower side of the annular plate, the lower side of the sliding ring is fixedly connected with the annular plate, the upper side face of the sliding ring is fixedly connected with circumferential equidistant L-shaped connecting plates, the equidistant L-shaped connecting plates are respectively arranged in the adjacent square grooves, the inner wall of the connecting pipe is fixedly connected with a fixed ring, an annular cavity is formed between the fixed ring and the connecting pipe, a first sliding rod is fixedly connected with the first sliding rod in a sliding manner, and a limiting block is fixedly connected to the lower end of the first sliding rod in the cavity between the connecting shell and the connecting pipe.
Further, the rubber cylinder is made of elastic friction-resistant materials, and the rubber cylinder is matched with the sleeve for setting.
Further, the diameter of the sealing ball is smaller than the inner diameter of the fixing ring, and the sealing ball is arranged as a soluble ball.
Further, the stabilizing component comprises guide rods with equal intervals in the circumferential direction, the connecting pipes are provided with sliding grooves with equal intervals in the circumferential direction, the limiting blocks are slidably connected to the sliding grooves of the adjacent connecting pipes, the guide rods with equal intervals in the circumferential direction are fixedly connected to the inner walls of the connecting shells, the guide rods are slidably connected with tooth plates, the tooth plates are in limit fit with the adjacent limiting blocks, through holes with equal intervals in the circumferential direction are formed between the fixing rings and the connecting pipes, the sealing plates are fixedly connected to the through holes between the fixing rings and the connecting pipes, the second sliding rods are slidably connected with the second sliding rods, the inner walls of the connecting shells are provided with rotating frames with equal intervals in the circumferential direction, the second sliding rods are slidably connected with the adjacent rotating frames, the through holes between the fixing rings and the connecting pipes are slidably connected with second pistons, fifth elastic pieces are arranged in the through holes between the fixing rings and the connecting pipes, and two ends of each fifth elastic piece are fixedly connected to the adjacent sealing plates and the second pistons respectively.
Compared with the prior art, the invention has the following advantages:
1. the sealing sleeve and the ball seat are used for sealing the first through hole, so that the first through hole is prevented from being blocked in the process of descending the filling tool into the well, the stability of the filling tool is improved, the backwashing, setting and filling work can be completed by descending the filling tool into the well once, and meanwhile, after filling is finished, the filling tool can be timely put into a production state, the time of underground operation is saved, and the operation cost is reduced.
2. The sealing sliding sleeve is supported by the limiting rod, so that fluctuation of pressure in the process of pumping the well flushing liquid into the sleeve is avoided, the sealing sliding sleeve slides up and down in the process of well flushing, and the well flushing efficiency of the filling device is reduced.
3. The limiting block is matched with the adjacent tooth plate to fix the position of the sliding ring, so that the phenomenon that the packing operation fails due to the fact that the packing element contracts and a gap is formed between the packing element and the sleeve is avoided due to the fact that pressure fluctuates in the sand-carrying fluid pumping process.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic perspective view showing a cross-section of the connecting pipe and the lower joint of the present invention.
FIG. 3 is a schematic perspective sectional view of the first through hole and ball seat of the present invention.
Fig. 4 is a schematic cross-sectional perspective view of the sealing sleeve of the present invention.
Fig. 5 is an enlarged perspective view of the present invention at a.
FIG. 6 is a schematic perspective view of the slide ring and annular plate of the present invention in cross-section.
Fig. 7 is an enlarged perspective view of the present invention at B.
Wherein the above figures include the following reference numerals: 101. the upper joint, 102, the connection pipe, 1021, the connection housing, 1022, the first through hole, 103, the lower joint, 104, the screen, 105, the ball seat, 106, the first elastic member, 107, the stop pin, 108, the sealing ball, 109, the L-shaped through hole, 110, the sealing post, 111, the sealing sleeve, 112, the second elastic member, 113, the filter screen, 201, the sealing sliding sleeve, 202, the third elastic member, 203, the second through hole, 204, the third through hole, 2041, the fourth through hole, 205, the stop ring, 206, the first piston, 207, the stop rod, 208, the fourth elastic member, 301, the annular groove, 302, the square groove, 303, the sliding ring, 304, the annular plate, 305, the rubber cylinder, 306, the L-shaped connection plate, 307, the fixing ring, 308, the first sliding rod, 309, the stop block, 310, the guide rod, 311, the tooth plate, 312, the sealing plate, 313, the second sliding rod, 314, the rotating frame, 315, the second piston, 316, and the fifth elastic member.
Detailed Description
It should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the description can be transferred in a meaning to identical components having identical reference numerals or identical component names. The position specification selected in the description, such as up, down, left, right, etc., also refers to the figures described directly and shown and is transferred in a meaning to a new position when the position is changed.
Example 1: 1-3, the filling tool for sand control well completion comprises an upper joint 101, wherein the upper joint 101 is fixedly connected with a connecting pipe 102, the outer side of the connecting pipe 102 is connected with a connecting shell 1021 in a threaded manner, the upper part of the connecting pipe 102 and the upper part of the connecting shell 1021 are provided with annular cavities, the connecting pipe 102 is in sealing fit with the connecting shell 1021 and is used for keeping the annular cavities between the connecting pipe 102 and the connecting shell 1021 in a hollow state, the lower part of the connecting pipe 102 is provided with two symmetrical first through holes 1022, sand-carrying fluid enters a casing through the two first through holes 1022 and fills cavities generated in an oil well, the lower end of the connecting pipe 102 is fixedly connected with a lower joint 103, the lower joint 103 is connected with a sieve tube 104, the connecting pipe 102 is connected with a ball seat 105 in a sliding manner, the ball seat 105 is used for sealing the first through holes 1022 and preventing impurities from entering the oil tube from the first through holes 1022 in the process of normal production operation, the lower part of the ball seat 105 is slidingly connected with the lower joint 103, a first elastic piece 106 is arranged in the lower joint 103, a first elastic piece 106 is fixedly connected between the ball seat 105 and the lower joint 103, the first elastic piece 106 is arranged as a spring, after the sand-carrying fluid pressure is reduced, the ball seat 105 moves upwards to reseal the first through hole 1022 under the elastic force of the first elastic piece 106, the lower joint 103 is fixedly connected with a symmetrical limiting pin 107, the limiting pin 107 is in limiting fit with the ball seat 105, the limiting pin 107 is used for fixing the position of the ball seat 105, when the sand-carrying fluid pressure exceeds a preset value, the limiting pin 107 is sheared by the ball seat 105, a sealing ball 108 is arranged on the ball seat 105 and used for sealing the upper part of the ball seat 105, two symmetrical L-shaped through holes 109 are arranged between the connecting pipe 102 and the connecting shell 1021, a sealing post 110 is slidingly connected with the L-shaped through hole 109, the sealing post 110 is in sealing fit with the L-shaped through hole 109, the lower part sliding connection of connecting pipe 102 has seal cover 111, seal cover 111 is used for sealed first through-hole 1022, prevent that the intraductal impurity of cover from blocking up first through-hole 1022, lead to the reduction of sand-carrying fluid filling efficiency, the rigid coupling has second elastic component 112 between seal cover 111 and the lower joint 103, the lower part of connecting pipe 102 is located to second elastic component 112 cover, the downside of seal cover 111 is located, seal cover 111 receives frictional force to upwards move, guarantee seal cover 111 to the sealing of first through-hole 1022, in the sleeve-moving process down along the sleeve, seal cover 111 rubs with the sleeve, seal cover 111 is in sealed state with first through-hole 1022 all the time, prevent that seal cover 111 from taking place to slide in the process of connecting pipe 102 is gone into the well, through changing the pressure of sand-carrying fluid, and then make seal cover 111 and ball seat 105 remove the sealing to first through-hole 1022 in step, upper joint 101 is provided with recoil assembly, increase the pressure of well-flushing fluid, connecting pipe 102 is provided with the seat assembly and sits the seal assembly, L-shaped through-hole 109 department installs 113, 113 is used for filtering the sand-carrying fluid.
As shown in fig. 1, 4 and 5, the recoil assembly comprises a sealing sliding sleeve 201, the sealing sliding sleeve 201 is slidably connected to an upper joint 101, a third elastic piece 202 is fixedly connected between the sealing sliding sleeve 201 and the upper joint 101, the third elastic piece 202 is arranged in the upper joint 101, the upper joint 101 is provided with six circumferentially equidistant second through holes 203, the sealing sliding sleeve 201 is provided with circumferentially equidistant third through holes 204, after the second through holes 203 and the third through holes 204 are communicated, well flushing fluid enters into an oil pipe through the second through holes 203 and the third through holes 204 to finish well flushing, the lower part of the upper joint 101 is provided with six circumferentially equidistant fourth through holes 2041, and a supporting component is arranged in the fourth through holes 2041 and used for supporting the sealing sliding sleeve 201.
As shown in fig. 5, the supporting component includes a limiting ring 205, the limiting ring 205 is fixedly connected to a fourth through hole 2041, a first piston 206 is slidably connected in the fourth through hole 2041, the limiting ring 205 is used for limiting the adjacent first piston 206, after the first piston 206 is extruded by the well washing liquid, the first piston 206 slides along the adjacent fourth through hole 2041, the first piston 206 is fixedly connected with a limiting rod 207, the limiting rod 207 penetrates through the upper joint 101 and is slidably connected with the upper joint, the limiting rod 207 is used for limiting the sealing sliding sleeve 201, the limiting rod 207 supports the lower side of the sealing sliding sleeve 201, the sealing sliding sleeve 201 is prevented from sliding up and down due to fluctuation of the well washing liquid pressure, thereby improving stability of the sealing sliding sleeve 201, a fourth elastic piece 208 is fixedly connected between the first piston 206 and the upper joint 101, and the fourth elastic piece 208 is arranged in the fourth through hole 2041.
As shown in fig. 6 and 7, the setting assembly comprises a sliding ring 303, the upper joint 101 is provided with an annular groove 301, the inner wall of the upper joint 101 is provided with six circumferentially equidistant square grooves 302, the circumferentially equidistant six square grooves 302 are all communicated with the annular groove 301, the sliding ring 303 is connected in the annular groove 301 in a sliding way, as the sand-carrying fluid pressure is continuously increased, the sand-carrying fluid downwards extrudes the sliding ring 303 through the square groove 302, the sliding ring 303 downwards slides along the annular groove 301, the sliding ring 303 passes through a connecting pipe 102, the connecting pipe 102 is sleeved with an annular plate 304 and a rubber cylinder 305, the sliding ring 303 downwards moves to downwards extrude the rubber cylinder 305 through the annular plate 304, the rubber cylinder 305 is deformed to be matched with a sleeve for setting, the rubber cylinder 305 is arranged into an elastic friction-resistant material, the abrasion of the rubber cylinder 305 caused by gravels in the sand-carrying fluid is reduced, the rubber cylinder is matched with the sleeve for setting, the annular plate 304 is positioned on the upper side of the rubber cylinder 305, the lower side of the sliding ring 303 is fixedly connected with the annular plate 304, six L-shaped connecting plates 306 with equal intervals are fixedly connected on the upper side surface of the sliding ring 303, the six L-shaped connecting plates 306 with equal intervals are respectively arranged in the adjacent square grooves 302, the inner wall of the connecting pipe 102 is fixedly connected with a fixed ring 307, an annular cavity is arranged between the fixed ring 307 and the connecting pipe 102, a first sliding rod 308 is fixedly connected with the L-shaped connecting plates 306, the first sliding rod 308 passes through the fixed ring 307 and is in sliding connection with the fixed ring 307, the first sliding rod 308 is in sealing fit with the fixed ring 307, the annular cavity between the fixed ring 307 and the connecting pipe 102 is ensured to be in a hollow state, a limiting block 309 is fixedly arranged at the lower end of the first sliding rod 308, a stabilizing component for limiting the first sliding rod 308 is arranged in the cavity between the connecting shell 1021 and the connecting pipe 102, the diameter of the sealing ball 108 is smaller than the inner diameter of the fixed ring 307, the sealing ball 108 is arranged as a soluble ball, after filling, the sealing ball 108 is gradually dissolved, the sealing of the ball seat 105 is released, and the working efficiency of the filling tool during normal production is ensured.
As shown in fig. 7, the stabilizing component comprises six guide rods 310 with equal intervals in the circumferential direction, the connecting pipe 102 is provided with six sliding grooves with equal intervals in the circumferential direction, the limiting block 309 is slidably connected to the sliding grooves of the adjacent connecting pipe 102, the limiting block 309 is wedge-shaped, the six guide rods 310 with equal intervals in the circumferential direction are fixedly connected to the inner wall of the connecting shell 1021, the guide rods 310 are slidably connected with tooth plates 311, the tooth plates 311 are in limit fit with the adjacent limiting blocks 309, the adjacent limiting blocks 309 are limited by the tooth plates 311, gaps between the rubber cylinder 305 and the sleeve pipe caused by sand-carrying fluid pressure fluctuation are prevented, setting failure is caused, six through holes with equal intervals in the circumferential direction are arranged between the fixing ring 307 and the connecting pipe 102, the through holes between the fixing ring 307 and the connecting pipe 102 are fixedly connected with sealing plates 312, the sealing plate 312 is used for sealing a through hole between the fixed ring 307 and the connecting pipe 102, the sealing plate 312 is slidably connected with a second sliding rod 313, six rotating frames 314 are circumferentially equidistant on the inner wall of the connecting shell 1021, the second sliding rod 313 is slidably connected with the adjacent rotating frames 314, the rotating frames 314 are slidably connected with the adjacent tooth plates 311, the rotating frames 314 swing to enable the tooth plates 311 to be in contact with the adjacent limiting blocks 309, a second piston 315 is slidably connected with the through hole between the fixed ring 307 and the connecting pipe 102, after the second piston 315 receives sand-carrying pressure, the second piston 315 slides along the through hole between the fixed ring 307 and the connecting pipe 102, a fifth elastic piece 316 is fixedly connected between the sealing plate 312 and the adjacent second piston 315, and the fifth elastic piece 316 is arranged in the through hole between the fixed ring 307 and the connecting pipe 102.
When gravel is required to be filled into an oil well, an operator connects an oil pipe to the upper end of the upper joint 101, then the filling tool is put into the sleeve, after the filling tool reaches a specified position, the operator pumps flushing fluid into the sleeve, the flushing fluid is continuously increased along with the pressure of the flushing fluid in the sleeve, the flushing fluid passes through the second through hole 203, the first piston 206 is simultaneously subjected to the pressure of the flushing fluid, the flushing fluid is continuously increased and pushes the sealing sliding sleeve 201 upwards, the sealing sliding sleeve 201 slides upwards along the inner wall of the upper joint 101, the third elastic member 202 is compressed, the sealing sliding sleeve 201 moves upwards, the second through hole 203 and the third through hole 204 are communicated with each other, when the sealing sliding sleeve 201 moves upwards to the specified position, the limiting rod 207 loses contact with the sealing sliding sleeve 201 at the moment, the first piston 206 drives the limiting rod 207 to move under the pressure of the flushing fluid, the limiting rod 207 is then moved to the lower side of the sealing sliding sleeve 201, the flushing fluid passes through the second through hole 203 and the third through hole 204, the flushing fluid enters into the oil pipe and is simultaneously pushed upwards, the sealing sliding sleeve 201 is simultaneously completed, simultaneously, the pressure of the sealing sliding sleeve 201 is simultaneously reset to the sealing sliding sleeve is prevented from being restored to the sealing sliding sleeve 201, and the elastic force of the sealing sliding sleeve is simultaneously lowered, and the sealing sliding sleeve is simultaneously, the sealing sleeve is lowered, and the sealing sleeve is elastically lowered.
The staff then drops into sealing ball 108 to oil pipe, sealing ball 108 rolls down along oil pipe, sealing ball 108 passes through top connection 101, connecting pipe 102 and solid ring 307 move down, sealing ball 108 sits in the upside of ball seat 105, then the staff pumps into sand carrying fluid to oil pipe, as sand carrying fluid pressure increases, sand carrying fluid extrudes sliding ring 303 downwards through square groove 302, sliding ring 303 receives the extrusion of sand carrying fluid, sliding ring 303 slides down along ring channel 301, sliding ring 303 drives annular plate 304 to slide downwards, annular plate 304 slides down along connecting pipe 102, rubber cylinder 305 deforms and is attached to the sleeve inner wall after the extrusion of annular plate 304, thus accomplish the sleeve setting, sliding ring 303 drives first sliding rod 308 to slide down through L-shaped connecting plate 306, first sliding rod 308 slides down along solid ring 307, gu ring 307 drives stopper 309 to move down, after sand carrying fluid is pumped into the sleeve, second piston 315 receives the extrusion of sand carrying fluid, second piston drives adjacent second sliding rod 313 to move outwards, fifth elastic piece 316 is pushed by second sliding rod 313 to rotate adjacent tooth 311 to adjacent tooth 311 along adjacent tooth 311, tooth 311 of adjacent tooth 311 is pushed by adjacent sliding rod's 314, and tooth's tip 311 rotates adjacent tooth's guide plate's portion.
In the process that the first sliding rod 308 slides downwards, the limiting block 309 moves downwards along the adjacent tooth plate 311, after the rubber cylinder 305 deforms and is attached to the sleeve, the sliding ring 303 stops moving downwards, the position of the sliding ring 303 is fixed through the matching of the limiting block 309 and the adjacent tooth plate 311, and the situation that the packing operation fails due to the fact that the rubber cylinder 305 contracts and a gap is generated between the rubber cylinder 305 and the sleeve due to the fact that pressure fluctuation occurs in the sand-carrying fluid pumping process is avoided.
After the packing element 305 is set, the staff increases the pressure of the sand-carrying fluid pumped into the oil pipe, the downward extrusion force of the ball seat 105 increases along with the increase of the pressure of the sand-carrying fluid, the limiting pins 107 on two sides are sheared, the ball seat 105 slides downwards along the connecting pipe 102 and the lower joint 103, the first elastic piece 106 is compressed, the ball seat 105 releases the seal of the L-shaped through hole 109 along with the downward movement of the ball seat 105, the sand-carrying fluid enters the L-shaped through hole 109 through the filter screen 113, the sand-carrying fluid filtered by the filter screen 113 pushes the sealing column 110 downwards, the sealing column 110 moves downwards along the L-shaped through hole 109, the sealing column 110 pushes the sealing sleeve 111 downwards, the sealing sleeve 111 slides downwards along the connecting pipe 102, the sealing sleeve 111 releases the seal of the first through hole 1022, the second elastic piece 112 is compressed, meanwhile, the ball seat 105 moves downwards and releases the seal of the first through hole 1022, the sand-carrying fluid flows into the casing through the first through hole 1022, and the sand-carrying fluid in the casing fills the cavity.
After the well cavity is filled, the pressure of the sand-carrying fluid pumped into the well is reduced by a worker, the ball seat 105 moves upwards to reset under the action of the elastic force of the first elastic member 106, meanwhile, the sealing sleeve 111 moves upwards along the connecting pipe 102 under the action of the elastic force of the second elastic member 112, the sealing sleeve 111 and the ball seat 105 seal the first through hole 1022 again, the second piston 315 and the second sliding rod 313 reset under the action of the elastic force of the fifth elastic member 316, the tooth plate 311 moves towards the side away from the adjacent limiting block 309, the tooth plate 311 releases the limiting on the adjacent limiting block 309, and the sliding ring 303, the annular plate 304 and the L-shaped connecting plate 306 move upwards to reset under the action of the elastic force of the rubber cylinder 305, so that the rubber cylinder 305 releases the sealing of the sleeve.
Oil gas enters into the filling device from the sieve tube 104, and after the sealing ball 108 is melted, normal production links are started in this way, in the process of the filling tool going into the well, the sealing sleeve 111 and the ball seat 105 seal the first through hole 1022, the first through hole 1022 is prevented from being blocked in the process of the filling tool going into the well, the stability of the filling tool is improved, simultaneously the filling tool can complete backwashing, setting and filling work after once going into the well, and meanwhile, after filling is finished, the filling tool can timely enter into a production state, the time of downhole operation is saved, and the operation cost is reduced.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (9)
1. The utility model provides a filling tool that sand control completion was used, includes top connection (101), and top connection (101) rigid coupling has connecting pipe (102), and the outside threaded connection of connecting pipe (102) has coupling shell (1021), its characterized in that: the upper part of the connecting pipe (102) and the connecting shell (1021) are provided with annular cavities, the lower part of the connecting pipe (102) is provided with symmetrical first through holes (1022), the lower end of the connecting pipe (102) is fixedly connected with a lower joint (103), the lower joint (103) is connected with a sieve tube (104), the connecting pipe (102) is slidably connected with a ball seat (105) for sealing the first through holes (1022), the lower part of the ball seat (105) is slidably connected with the lower joint (103), the lower joint (103) is internally provided with a first elastic piece (106) fixedly connected with the ball seat (105) and the lower joint (103) respectively, the lower joint (103) is fixedly connected with a limiting pin (107) which is symmetrical and is in limit fit with the ball seat (105), the ball seat (105) is provided with a sealing ball (108), a symmetrical L-shaped through hole (109) is arranged between the connecting pipe (102) and the connecting shell (1021), the lower part of the connecting pipe (102) is slidably connected with a sealing post (110) for sealing the first through holes (1022), the lower part of the connecting pipe (102) is sleeved with a sealing sleeve (111), the lower part of the connecting pipe (102) is fixedly connected with a second elastic piece (112) and the two sealing sleeves (112) are fixedly connected with sand-filled respectively, and then make seal cover (111) and ball seat (105) synchronous release to first through-hole (1022) sealed, upper joint (101) are provided with the recoil subassembly that is used for increasing the flushing fluid pressure, and connecting pipe (102) are provided with the setting subassembly, and the setting subassembly is used for setting the sleeve pipe.
2. A packing tool for sand control completions according to claim 1 wherein: the second elastic piece (112) is located at the lower side of the sealing sleeve (111), the sealing sleeve (111) moves upwards under friction force, sealing of the sealing sleeve (111) to the first through hole (1022) is guaranteed, and sliding of the sealing sleeve (111) in the process of descending the connecting pipe (102) is prevented.
3. A packing tool for sand control completions according to claim 1 wherein: comprises symmetrical filter screens (113), wherein the filter screens (113) are arranged in adjacent L-shaped through holes (109), and the filter screens (113) are used for filtering sand-carrying fluid.
4. A packing tool for sand control completions according to claim 1 wherein: the recoil assembly comprises a sealing sliding sleeve (201), the sealing sliding sleeve (201) is slidably connected to an upper joint (101), a third elastic piece (202) is arranged in the upper joint (101), two ends of the third elastic piece (202) are fixedly connected to the sealing sliding sleeve (201) and the upper joint (101) respectively, the upper joint (101) is provided with a second through hole (203) with equal circumferential spacing, the sealing sliding sleeve (201) is provided with a third through hole (204) with equal circumferential spacing, the lower part of the upper joint (101) is provided with a fourth through hole (2041) with equal circumferential spacing, and a supporting component is arranged in the fourth through hole (2041) and is used for supporting the sealing sliding sleeve (201).
5. A packing tool for sand control completions according to claim 4 wherein: the supporting part comprises a limiting ring (205), the limiting ring (205) is fixedly connected to a fourth through hole (2041), a first piston (206) is connected in a sliding manner in the fourth through hole (2041), a limiting rod (207) is fixedly connected to the first piston (206), the limiting rod (207) penetrates through the upper joint (101) and is connected with the upper joint in a sliding manner, the limiting rod (207) is used for limiting the sealing sliding sleeve (201), a fourth elastic piece (208) is arranged in the fourth through hole (2041), and two ends of the fourth elastic piece (208) are fixedly connected to the adjacent first piston (206) and the upper joint (101) respectively.
6. A packing tool for sand control completions according to claim 1 wherein: the setting component comprises a sliding ring (303), the upper joint (101) is provided with an annular groove (301), the inner wall of the upper joint (101) is provided with circumferential equidistant square grooves (302), the circumferential equidistant square grooves (302) are communicated with the annular groove (301), the sliding ring (303) is connected in the annular groove (301) in a sliding way, the sliding ring (303) penetrates through a connecting pipe (102), the connecting pipe (102) is sleeved with an annular plate (304) and a rubber cylinder (305), the rubber cylinder (305) is positioned at the lower side of the annular plate (304), the lower side of the sliding ring (303) is fixedly connected with the annular plate (304), the upper side of the sliding ring (303) is fixedly connected with circumferential equidistant L-shaped connecting plates (306), the equidistant L-shaped connecting plates (306) are respectively arranged in the adjacent square grooves (302), the inner wall of the connecting pipe (102) is fixedly connected with a fixed ring (307), an annular cavity is arranged between the fixed ring (307) and the connecting pipe (102), the L-shaped connecting plates (306) are fixedly connected with a first sliding rod (308), the first sliding rod (308) penetrates through the fixed ring (307) and is fixedly connected with the lower end of the first sliding rod (308), a stabilizing component used for limiting the first sliding rod (308) is arranged in a cavity between the connecting shell (1021) and the connecting pipe (102).
7. A packing tool for sand control completions according to claim 6 wherein: the rubber cylinder (305) is made of elastic friction-resistant materials, and the rubber cylinder (305) is matched with the sleeve for setting.
8. A packing tool for sand control completions according to claim 6 wherein: the diameter of the sealing ball (108) is smaller than the inner diameter of the fixing ring (307), and the sealing ball (108) is configured as a soluble ball.
9. A packing tool for sand control completions according to claim 6 wherein: the stabilizing component comprises guide rods (310) with equal intervals in the circumferential direction, the connecting pipes (102) are provided with sliding grooves with equal intervals in the circumferential direction, limiting blocks (309) are connected in the sliding grooves of the adjacent connecting pipes (102) in a sliding mode, the guide rods (310) with equal intervals in the circumferential direction are fixedly connected to the inner walls of the connecting shells (1021), tooth plates (311) are connected to the guide rods (310) in a sliding mode, the tooth plates (311) are in limit fit with the adjacent limiting blocks (309), through holes with equal intervals in the circumferential direction are formed between the fixing rings (307) and the connecting pipes (102), sealing plates (312) are fixedly connected to the through holes between the fixing rings (307) and the connecting pipes (102), second sliding rods (313) are connected to the inner walls of the connecting shells (1021) in the circumferential direction, rotating frames (314) with equal intervals in the circumferential direction are connected to the inner walls of the connecting shells (1021), the second sliding rods (313) are connected to the adjacent rotating frames (314) in a sliding mode, second pistons (315) are connected to the through holes between the fixing rings (307) and the connecting pipes (102) in the sliding mode, fifth elastic pieces (316) are arranged in the through holes between the fixing rings (307) and the connecting pipes (102), and the fifth elastic pieces (316) are fixedly connected to the fifth elastic pieces (316) are arranged at two ends of the second pistons (315).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310576583.1A CN116291335B (en) | 2023-05-22 | 2023-05-22 | Filling tool for sand prevention well completion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310576583.1A CN116291335B (en) | 2023-05-22 | 2023-05-22 | Filling tool for sand prevention well completion |
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| CN116291335A true CN116291335A (en) | 2023-06-23 |
| CN116291335B CN116291335B (en) | 2023-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117888863A (en) * | 2024-03-15 | 2024-04-16 | 东营市华科石油科技开发有限责任公司 | Gravel packing layered sand control completion tool |
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|---|---|
| CN116291335B (en) | 2023-07-21 |
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