CN115822508A - Multi-stage hydraulic setting co-well injection and production system pipe column - Google Patents
Multi-stage hydraulic setting co-well injection and production system pipe column Download PDFInfo
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- CN115822508A CN115822508A CN202310092622.0A CN202310092622A CN115822508A CN 115822508 A CN115822508 A CN 115822508A CN 202310092622 A CN202310092622 A CN 202310092622A CN 115822508 A CN115822508 A CN 115822508A
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- 238000002347 injection Methods 0.000 title claims abstract description 76
- 239000007924 injection Substances 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000004873 anchoring Methods 0.000 claims abstract description 14
- 239000003129 oil well Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 13
- 210000000078 claw Anatomy 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 241000935974 Paralichthys dentatus Species 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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- 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
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Abstract
The invention discloses a multi-stage hydraulic setting co-well injection and production system tubular column, which relates to the technical field of oil production tubular columns in oil fields and comprises an upper connector, a hydraulic packer, a tubular column centering device and a hydraulic anchoring device which are sequentially connected from top to bottom, wherein the hydraulic packer is provided with multiple stages, the multiple stages of hydraulic packers are connected in series up and down, and a water injection control device is arranged between every two adjacent hydraulic packers; an oil-way channel and a water-way channel are arranged in a pipe column of the multi-stage hydraulic setting co-well injection and production system, and after oil-well liquid is separated by an underground oil-water separation facility, oil enters the oil-way channel, flows to the ring sleeve space through an oil-way outlet and is produced through an oil-well pump; water enters the waterway channel and is injected into the stratum through the waterway outlet after reaching the water injection layer; the device has simple structure, can realize the injection and production functions in the same well through a double-channel structure, greatly reduces the ground liquid production amount, and realizes the yield and efficiency increase and cost reduction.
Description
Technical Field
The invention relates to the technical field of oil production pipes in oil fields, in particular to a multi-stage hydraulic setting same-well injection and production system pipe column.
Background
The oil field exploitation enters the middle and later stages, the water content of the oil well produced liquid is high, the sewage treatment cost is increased, and the water injection cost is increased. The same well injection and production system pipe column is an important underground system pipe column in the oil field development process and is used for realizing oil production and reinjection in the same well.
In order to realize the yield and efficiency increase and reduce the production cost, a novel tubular column of the same-well injection and production system is urgently needed to be developed.
Disclosure of Invention
The invention provides a multi-stage hydraulic setting same-well injection-production system pipe column in order to reduce the production cost of a high-water-content oil well and realize yield increase and efficiency increase.
The technical scheme of the invention is as follows: a multi-stage hydraulic setting same-well injection-production system pipe column comprises an upper joint, hydraulic packers, a pipe column centralizing device and a hydraulic anchoring device which are sequentially connected from top to bottom, wherein the hydraulic packers are multi-stage, the multi-stage hydraulic packers are connected in series from top to bottom, and a water injection control device is arranged between every two adjacent hydraulic packers;
an oil path channel and a water path channel are arranged in the tubular column of the multi-stage hydraulic setting same-well injection-production system, an oil path inlet of the oil path channel is a sieve pore on the outer wall of the tubular column at the lower end of the lowest-stage hydraulic packer, and an oil path outlet is a sieve pore on the outer wall of the upper joint; a waterway inlet of the waterway channel is the lower end of an inner hole of the hydraulic anchoring device, and a waterway outlet is an outer wall outlet of the water injection control device; after the oil well liquid is separated by the underground oil-water separation facility, the oil enters the oil path channel, flows to the ring sleeve space through the oil path outlet and is extracted through the oil well pump; and water enters the waterway channel and is injected into the stratum through the waterway outlet after reaching the water injection layer.
Preferably, the hydraulic packer comprises a central pipe, the central pipe is of a double-layer structure with an annular flow channel, and a connecting pipe, a rubber cylinder group, a multi-stage hydraulic group and a clamp spring sleeve are sequentially arranged on the outer side of the central pipe from top to bottom;
the multistage hydraulic unit comprises a plurality of sliding pistons connected on the peripheral surface of the central pipe in a sliding and sealing mode and sliding sleeves, and two ends of each sliding sleeve are connected on the peripheral surfaces of two adjacent sliding pistons respectively;
a positioning sleeve is fixedly arranged between two adjacent sliding pistons on the outer peripheral surface of the central tube, the outer peripheral surface of the positioning sleeve is in sliding sealing fit with the inner peripheral surface of the sliding sleeve, and a first pressure transmission gap is arranged between the top of the positioning sleeve and the adjacent sliding piston;
the bottom of the outer peripheral surface of the central tube is provided with an annular step, a second pressure transmission gap is arranged between the top of the annular step and the adjacent sliding piston, and the central tube is respectively provided with a bridge type pressure guide channel for communicating the inner cavity of the central tube with the first pressure transmission gap and the second pressure transmission gap;
the clamp spring sleeve is arranged on the outer side of the annular step in a sliding sealing mode, the top of the clamp spring sleeve is connected with the adjacent sliding piston, a shearing pin is arranged between the clamp spring sleeve and the annular step, a clamping groove part is formed in the inner circumferential surface of the clamp spring sleeve, and a clamp spring matched with the clamping groove part is arranged on the outer circumferential surface of the annular step;
the top of center tube and connecting pipe is connected with the top connection, set up the bypass runner with the annular space runner intercommunication of center tube on the wall of top connection.
Preferably, the central tube comprises an inner tube body and an outer tube body, and a plurality of spacers are connected between the inner tube body and the outer tube body; and the lower end of the outer pipe body of the hydraulic packer at the lowest stage is provided with a sieve mesh communicated with the annular flow channel.
Preferably, the water injection control device comprises a main body, a constant-flow plug, a safety valve and a time-delay automatic valve, wherein the constant-flow plug is arranged in a groove in the outer wall of the main body and is communicated with the inner cavity of the main body and an external water injection layer.
Preferably, a long hole for installing the delay automatic valve is axially arranged in the pipe wall of the main body, the delay automatic valve comprises a slide valve, a spring, a stop block, a soluble metal body and a lock cap, the spring, the slide valve and the soluble metal body are sequentially arranged in the long hole, the stop block is arranged at one end of the long hole and used for pressing the spring, the lock cap is arranged at the other end of the long hole and used for supporting the soluble metal body, and a through hole is formed in the lock cap;
the pipe wall of the main body is provided with a first communicating hole for communicating the inner cavity of the main body with the long hole and a second communicating hole for communicating the long hole with the outside of the main body, the slide valve is a columnar body, and a communicating cavity is arranged in the slide valve; before the soluble metal body is dissolved, the first communicating hole, the communicating cavity and the second communicating hole are communicated to form a flow passage; after the soluble metal body is dissolved, the slide valve moves, and the overflowing channel is disconnected.
Preferably, the first communicating hole and the second communicating hole are arranged in a vertically staggered manner, two stages of sealing rings are arranged on the slide valve, the two stages of sealing rings are respectively positioned on the upper side and the lower side of the communicating cavity, and the first communicating hole and the second communicating hole are positioned between the two stages of sealing rings before the soluble metal body is dissolved; after the soluble metal body is dissolved, the primary sealing ring is positioned between the first communicating hole and the second communicating hole.
Preferably, the tubular column centering device comprises a friction plate central tube, a friction body, a rectangular spring, a friction plate and a pressure ring, wherein the friction body is fixedly sleeved on the outer side of the friction plate central tube, and a groove for mounting the rectangular spring and the friction plate is formed in the outer wall of the friction body; the rectangular spring is arranged on the inner side of the friction plate, and the friction plate is pressed in a groove on the outer wall of the friction body through a pressing ring; the friction plates are arranged on the outer wall of the friction body in a circumferential array.
Preferably, the hydraulic anchoring device comprises an anchor body, a tension spring, a pressing plate and an anchor claw, wherein a plurality of holes for mounting the tension spring and the anchor claw are formed in the outer wall of the anchor body, and the anchor claw and the tension spring are limited in the holes in the outer wall of the anchor body through the pressing plate; and the hole bottom is provided with a through hole communicated with the inner cavity of the anchor body.
Compared with the prior art, the invention has the following advantages:
the device has simple structure, can realize the injection and production functions of the same well through a double-channel structure, greatly reduces the ground liquid production amount, and realizes the yield and efficiency increase and cost reduction; the hydraulic packer is provided with a multi-stage pressure cavity structure, and the multi-stage pressure cavity structure can be used for simultaneously acting on a packer rubber sleeve through pressure superposition, so that setting under the low-pressure condition is realized; the hydraulic packer can be used in series from top to bottom in multiple stages, so that the requirement of underground separate layer water injection is met; the water injection control device can adjust and control the water injection amount according to the injection requirement of the water injection layer; the time-delay automatic valve can be automatically closed according to the design time, and the seal inspection of each level of packer can be realized according to the change of the load of the injection pump caused by the change of the water injection pressure before and after the time-delay automatic valve is closed; the seal inspection of the packer of the device is carried out under the dynamic condition, namely the seal performance of the packer is actually verified after the injection pump works.
Drawings
FIG. 1 is a schematic structural view of the upper half of the present invention;
FIG. 2 is a schematic view of the lower half of the present invention;
FIG. 3 is a schematic structural diagram of the upper half of the hydraulic packer;
FIG. 4 is a schematic structural diagram of the lower half of the hydraulic packer;
FIG. 5 is a schematic structural diagram of a water injection control device;
fig. 6 is a schematic diagram of the structure of the pipe string centralizing device and the hydraulic anchoring device.
In the figure: 1. the hydraulic packer comprises an upper joint, 2, a hydraulic packer, 201, an upper joint, 202, a connecting pipe, 203, a central pipe, 204, a rubber cylinder, 205, a spacer ring, 206, a sliding piston, 207, a positioning sleeve, 208, a sliding sleeve, 209, a first pressure transmission gap, 210, a snap spring, 211, a shearing pin, 212, a snap spring sleeve, 213, a clamping groove part, 214, an annular step, 215, a bridge pressure guide channel, 216, a second pressure transmission gap, 3, a water injection control device, 31, a constant flow plug, 32, a safety valve, 321, a plug, 322, a sealing block, 323, a pressure spring, 324, a valve ball, 33, a time delay automatic valve, 331, a soluble metal body, 332, a sliding valve, 333, a spring, 334, a stop block, 335, a locking cap, 34, a main body, 341, a first connecting hole, 342, a second connecting hole, 343, a connecting cavity, 4, a pipe column centering device, 401, a friction plate, a central pipe, 402, a friction body, a rectangular spring, a pressure ring, a friction plate, 405, a hydraulic anchor body, a tension spring, a pressure plate, a hydraulic claw, 502, a hydraulic pressure spring, a hydraulic pressure plate.
K11, an oil path inlet, K12, an oil path outlet, K21, a water path inlet, K22, a water path outlet, L1, an oil path channel, and L2, a water path channel.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example one
Referring to fig. 1-6, the multi-stage hydraulic setting same-well injection-production system pipe column comprises an upper connector 1, hydraulic packers 2, a pipe column centering device 4 and a hydraulic anchoring device 5 which are sequentially connected from top to bottom, wherein the hydraulic packers 2 are provided with multiple stages, the multi-stage hydraulic packers 2 are connected in series from top to bottom, and a water injection control device 3 is arranged between every two adjacent hydraulic packers 2;
an oil path channel L1 and a water path channel L2 are arranged in a pipe column of the multi-stage hydraulic setting same-well injection-production system, an oil path inlet K11 of the oil path channel L1 is a sieve hole on the outer wall of the pipe column at the lower end of the hydraulic packer 2 at the lowest stage, and an oil path outlet K12 is a sieve hole on the outer wall of the upper joint 1; a waterway inlet K21 of the waterway channel L2 is the lower end of an inner hole of the hydraulic anchoring device 5, and a waterway outlet K22 is an outer wall outlet of the water injection control device 3; after the oil well fluid is separated by the underground oil-water separation facility, the oil enters an oil path channel L1, flows to the ring sleeve space through an oil path outlet K12 and is extracted through an oil well pump; water enters the waterway channel L2 and is injected into the stratum through the waterway outlet K22 after reaching the water injection layer.
The hydraulic packer 2 comprises a central pipe 203, the central pipe 203 is of a double-layer structure with an annular flow channel, and the outer side of the central pipe 203 is sequentially provided with a connecting pipe 202, a rubber cylinder 204 group, a multi-stage hydraulic group and a clamp spring sleeve 212 from top to bottom;
the multi-stage hydraulic group comprises a plurality of sliding pistons 206 which are connected on the outer peripheral surface of the central pipe 203 in a sliding and sealing mode, and sliding sleeves 208 of which the two ends are respectively connected on the outer peripheral surfaces of two adjacent sliding pistons 206;
a positioning sleeve 207 is fixedly arranged between two adjacent sliding pistons 206 on the outer peripheral surface of the central tube 203, the outer peripheral surface of the positioning sleeve 207 is in sliding sealing fit with the inner peripheral surface of the sliding sleeve 208, and a first pressure transmission gap 209 is arranged between the top of the positioning sleeve 207 and the adjacent sliding piston 206;
an annular step 214 is arranged at the bottom of the outer peripheral surface of the central tube 203, a second pressure transmission gap 216 is arranged between the top of the annular step 214 and the adjacent sliding piston 206, and a bridge pressure guide channel 215 for communicating the inner cavity of the central tube 203 with the first pressure transmission gap 209 and the second pressure transmission gap 216 is respectively arranged on the central tube 203;
the snap spring sleeve 212 is sleeved outside the annular step 214 in a sliding and sealing mode, the top of the snap spring sleeve 212 is connected with the adjacent sliding piston 206, a shearing pin 211 is arranged between the snap spring sleeve 212 and the annular step 214, a snap groove part 213 is arranged on the inner circumferential surface of the snap spring sleeve 212, and a snap spring 210 matched with the snap groove part 213 is arranged on the outer circumferential surface of the annular step 214;
the top of the center tube 203 and the top of the connecting tube 202 are connected with an upper joint 201, and a bypass flow passage communicated with an annular flow passage of the center tube 203 is formed in the wall of the upper joint 201.
The central tube 203 comprises an inner tube body and an outer tube body, and a plurality of spacer blocks are connected between the inner tube body and the outer tube body; and the lower end of the outer pipe body of the hydraulic packer 2 at the lowest stage is provided with a sieve mesh communicated with the annular flow passage.
The water injection control device 3 comprises a main body 34, a constant-flow blanking plug 31, a safety valve 32 and a time-delay automatic valve 33, wherein the constant-flow blanking plug 31 is arranged in a groove on the outer wall of the main body 34 and is communicated with the inner cavity of the main body 34 and an external water injection layer; the constant-flow blanking plug 31 can adjust and control the water injection amount by adjusting the water nozzle parameters of the constant-flow blanking plug 31 according to the injection requirement of the water injection layer.
A long hole for installing the delay automatic valve 33 is axially arranged in the pipe wall of the main body 34, the delay automatic valve 33 comprises a slide valve 332, a spring 333, a stop 334, a soluble metal body 331 and a lock cap 335, the spring 333, the slide valve 332 and the soluble metal body 331 are sequentially arranged in the long hole, the stop 334 is arranged at one end of the long hole and used for pressing the spring 333, the lock cap 335 is arranged at the other end of the long hole and used for supporting the soluble metal body 331, and a through hole is formed in the lock cap 335;
a first communicating hole 341 for communicating the inner cavity of the main body 34 with the long hole and a second communicating hole 342 for communicating the long hole with the outside of the main body 34 are arranged on the tube wall of the main body 34, the slide valve 332 is a columnar body, and a communicating cavity 343 is arranged in the slide valve 332; before the soluble metal body 331 is dissolved, the first communicating hole 341, the communicating cavity 343 and the second communicating hole 342 are communicated to form a flow passage; after the soluble metal body 331 is dissolved, the slide valve 332 moves, and the flow passage is opened.
After the multistage hydraulic packer 2 is set, whether the hydraulic packer 2 finishes setting or not can be judged according to the change of the load of the injection pump caused by the change of the water injection pressure before and after the time-delay automatic valve 33 is closed, so that the seal checking work of the packer is realized. The dissolution time of the soluble metal body 331 of the delay automatic valve 33 is adjusted, so that the closing time of each delay automatic valve 33 is different, and the sectional seal inspection of each level of packers of the whole pipe column is realized.
The tubular column centering device 4 comprises a friction plate central tube 401, a friction body 402, a rectangular spring 403, a friction plate 404 and a pressing ring 405, wherein the friction body 402 is fixedly sleeved on the outer side of the friction plate central tube 401, and the outer wall of the friction body 402 is provided with a groove for mounting the rectangular spring 403 and the friction plate 404; the rectangular spring 403 is arranged on the inner side of the friction plate 404, and the friction plate 404 is pressed in a groove on the outer wall of the friction body 402 through a pressing ring 405; the friction plates 404 are arranged on the outer wall of the friction body 402 in a circumferential array, and the rectangular springs 403 drive the friction plates 404 to synchronously move along the radial direction and contact with the inner wall of the sleeve, so that the whole tubular column is righted.
The hydraulic anchoring device 5 comprises an anchor body 501, a tension spring 502, a pressing sheet 503 and an anchor claw 504, wherein a plurality of holes for mounting the tension spring 502 and the anchor claw 504 are formed in the outer wall of the anchor body 501, and the anchor claw 504 and the tension spring 502 are limited in the holes in the outer wall of the anchor body 501 through the pressing sheet 503; the bottom of the hole is provided with a through hole communicated with the inner cavity of the anchor body 501. After the underground injection pump works, the water pressure presses out the anchor fluke 504, and teeth of the anchor fluke 504 are tightly attached to the inner wall of the sleeve, so that anchoring and setting at the bottom of the pipe column are realized. The downhole injection pump stops working and pressure is removed and the tension spring 502 pulls the fluke 504 back into place.
The oil channel L1 is formed by connecting an annular flow channel of a central tube 203 of the hydraulic packer 2 with a long flow channel axially communicated with the inner wall of a main body 34 of the water injection control device 3, and the water channel L2 is formed by connecting an inner cavity of an anchor body 501, an inner cavity of a central tube 401 of the friction plate, an inner cavity of the central tube 203 and an inner cavity of the main body 34.
When in use, the method comprises the following steps:
firstly, the upper part of the pipe column is connected with an oil well pump, the lower part of the pipe column is connected with an injection pump, the lower part of the injection pump is connected with an underground oil-water separation facility, and the whole pipe column is put into a well after connection is finished;
next, after the underground oil-water separation facility, the injection pump and the oil-well pump work after the underground oil-water separation facility goes down to a preset position, and the hydraulic anchoring device 5 realizes anchoring setting by means of hydraulic pressure;
next, the multistage hydraulic packer 2 completes setting by means of hydraulic pressure: the hydraulic pressure enters a first pressure transmission gap 209 and a second pressure transmission gap 216 through a bridge pressure guide channel 215, then the sliding piston 206 is pushed to move upwards, the sliding piston 206 is linked with the sliding sleeve 208 and the clamp spring sleeve 212 to move upwards together, the uppermost sliding piston 206 extrudes the rubber cylinder 204 to be set in the process of moving upwards, then the clamp groove part 213 is matched with the clamp spring 210 to lock the positions of the sliding piston 206, the sliding sleeve 208 and the clamp spring sleeve 212, and the setting operation is completed.
Next, each delayed automatic valve 33 is closed in turn according to the designed delay time requirement. According to the change of the load of the injection pump caused by the change of the water injection pressure before and after the time delay automatic valve 33 is closed, whether the two-stage hydraulic packers 2 of the reinjection layer corresponding to the time delay automatic valve 33 complete setting or not can be judged, and if the load of the injection pump is increased, the two-stage hydraulic packers 2 complete setting is indicated; if the load of the injection pump is not changed, the situation that setting is not finished in the two-stage hydraulic packer 2 is indicated; and (4) checking the seal step by step according to the closing time of each time delay automatic valve 33.
And next, after the seal checking work of the hydraulic packers 2 of all the reinjection layers is finished, the production operation work is normally carried out.
The device has simple structure, can realize the injection and production functions of the same well through a double-channel structure, greatly reduces the ground liquid production amount, and realizes the yield and efficiency increase and cost reduction; the hydraulic packer 2 has a multi-stage pressure cavity structure, the pressure of the multi-stage pressure cavity is superposed, and the multi-stage pressure cavity can act on the packer rubber cylinder 204 simultaneously, so that the setting under the low-pressure condition is realized; the hydraulic packer 2 can be used in series up and down in multiple stages, so that the requirement of underground separate layer water injection is met; the water injection control device 3 can adjust and control the water injection amount according to the injection requirement of the water injection layer; the time-delay automatic valve 33 can be automatically closed according to the design time, and the seal inspection of each level of packer can be realized according to the change of the load of the injection pump caused by the change of the water injection pressure before and after the closing of the time-delay automatic valve; the seal inspection of the packer of the device is carried out under the dynamic condition, namely the seal performance of the packer is actually verified after the injection pump works.
Example two
As a preferred embodiment of the present invention, in this embodiment, the structure of the rubber cylinder 204 group and the slot 213 is optimally designed on the basis of the first embodiment, specifically:
referring to fig. 3-4, in the present embodiment, the glue cylinder 204 set includes a middle glue cylinder 204 and side glue cylinders 204 distributed on two sides of the middle glue cylinder 204, and a spacer ring 205 is disposed between the middle glue cylinder 204 and the side glue cylinders 204. Through the design of a plurality of groups of rubber cylinders 204 and the spacer rings 205, the contact surface of the rubber cylinders 204 and the shaft is increased, and the setting stability is improved.
The groove 213 protrudes from the inner circumferential surface of the clamp spring cover 212, and the upper end of the groove 213 is formed in a slope. Through the structural design, when the snap spring sleeve 212 breaks the shearing pin 211 and then moves upwards, the slope-shaped structure at the upper end of the clamping groove part 213 contacts the snap spring 210 firstly and presses the snap spring 210 to elastically contract, the clamping groove part 213 continues to move upwards, and when the snap spring 210 corresponds to the groove on the clamping groove part 213, the snap spring 210 elastically resets and extends into the groove, so that the position of the snap spring sleeve 212 is locked.
EXAMPLE III
As a preferred embodiment of the present invention, in this embodiment, an optimized design is performed on the structure of the safety valve 32 on the basis of the first embodiment, specifically:
referring to fig. 5, in the present embodiment, the relief valve 32 is installed in an axially elongated hole in the outer wall of the main body 34 of the water injection control device 3, and includes a plug 321, a seal block 322, a compression spring 323, and a valve ball 324. The safety valve 32 has two functions, one is a one-way valve, a liquid channel entering the inner cavity from the outside of the water injection control device 3 is blocked by the pressure spring 323 and the valve ball 324, and liquid can only enter the outer cavity from the inner cavity of the water injection control device 3 through the liquid channel; secondly, the safety valve 32 is used, when the overpressure of the liquid pressure in the inner cavity of the water injection control device 3 reaches the designed release value, the valve ball 324 is opened, and the inner cavity channel and the outer cavity channel of the water injection control device 3 are communicated to release the pressure.
Example four
As a preferred embodiment of the present invention, in this embodiment, an optimized design is performed on the structure of the delayed automatic valve 33 on the basis of the first embodiment, specifically:
referring to FIG. 5, in the present embodiment, the first communication hole 341 and the second communication hole 342 of the delay automatic valve 33 are provided in a vertically staggered manner.
In addition, two stages of sealing rings are arranged on the slide valve 332 and are respectively positioned at the upper side and the lower side of the communicating cavity 343, and the first communicating hole 341 and the second communicating hole 342 are positioned between the two stages of sealing rings before the soluble metal body 331 is dissolved; after the soluble metal body 331 is dissolved, the primary seal ring is located between the first communication hole 341 and the second communication hole 342.
After the delay automatic valve 33 is closed, the packing interposed between the first and second communication holes 341 and 342 improves the sealing performance of the spool 332 after it is closed.
EXAMPLE five
The lower well string of this embodiment is equipped with three hydraulic packer 2 and two water injection controlling means 3 that correspond, and three hydraulic packer 2 from the top down is one-level packer, second grade packer and tertiary packer in proper order, and two water injection controlling means 3 from the top down are first overflow device and second overflow device in proper order, and the timing off-time of first overflow device is 12 hours, and the timing off-time of second overflow device is 24 hours.
The downhole tubular column of the embodiment is put into a well, and after the tubular column is put to a preset position, an injection pump is started to seat the three packers and inject water; after 12 hours, the first overflowing device is closed, at the moment, if the load of the injection pump is increased, the first-stage packer and the second-stage packer are both completely set, and if the load of the injection pump is not changed, the first overflowing device and the second overflowing device are not completely set; and after 24 hours, the second overflowing device is closed, at the moment, if the load of the injection pump is increased, the second-level packer and the third-level packer are both completely set, and if the load of the injection pump is not changed, the second overflowing device and the third-level packer are not completely set.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (8)
1. The utility model provides a multistage hydraulic pressure is set up and is sealed annotating with well and adopt system's tubular column, includes upper portion joint, hydraulic packer, tubular column righting device and the hydraulic anchoring device that from top to bottom connects gradually, its characterized in that: the hydraulic packers are provided with multiple stages, the multiple stages of hydraulic packers are connected in series up and down, and a water injection control device is arranged between every two adjacent hydraulic packers;
an oil path channel and a water path channel are arranged in the tubular column of the multi-stage hydraulic setting same-well injection-production system, an oil path inlet of the oil path channel is a sieve pore on the outer wall of the tubular column at the lower end of the lowest-stage hydraulic packer, and an oil path outlet is a sieve pore on the outer wall of the upper joint; the waterway inlet of the waterway channel is the lower end of an inner hole of the hydraulic anchoring device, and the waterway outlet is an outer wall outlet of the water injection control device; after the oil well liquid is separated by the underground oil-water separation facility, the oil enters the oil path channel, flows to the ring sleeve space through the oil path outlet and is extracted through the oil well pump; and water enters the waterway channel and is injected into the stratum through the waterway outlet after reaching the water injection layer.
2. The multi-stage hydraulic setting same-well injection-production system pipe column according to claim 1, characterized in that: the hydraulic packer comprises a central pipe, the central pipe is of a double-layer structure with an annular flow channel, and a connecting pipe, a rubber cylinder group, a multi-stage hydraulic group and a clamp spring sleeve are sequentially arranged on the outer side of the central pipe from top to bottom;
the multistage hydraulic group comprises a plurality of sliding pistons which are connected on the peripheral surface of the central pipe in a sliding and sealing manner, and sliding sleeves of which two ends are respectively connected on the peripheral surfaces of two adjacent sliding pistons;
a positioning sleeve is fixedly arranged between two adjacent sliding pistons on the outer peripheral surface of the central tube, the outer peripheral surface of the positioning sleeve is in sliding sealing fit with the inner peripheral surface of the sliding sleeve, and a first pressure transmission gap is arranged between the top of the positioning sleeve and the adjacent sliding piston;
the bottom of the outer peripheral surface of the central tube is provided with an annular step, a second pressure transmission gap is arranged between the top of the annular step and the adjacent sliding piston, and the central tube is respectively provided with a bridge type pressure guide channel for communicating the inner cavity of the central tube with the first pressure transmission gap and the second pressure transmission gap;
the clamp spring sleeve is arranged on the outer side of the annular step in a sliding sealing mode, the top of the clamp spring sleeve is connected with the adjacent sliding piston, a shearing pin is arranged between the clamp spring sleeve and the annular step, a clamping groove part is formed in the inner circumferential surface of the clamp spring sleeve, and a clamp spring matched with the clamping groove part is arranged on the outer circumferential surface of the annular step;
the top of center tube and connecting pipe is connected with the top connection, set up the bypass runner with the annular space runner intercommunication of center tube on the wall of top connection.
3. The multi-stage hydraulic setting co-well injection and production system pipe column according to claim 2, characterized in that: the central tube comprises an inner tube body and an outer tube body, and a plurality of spacer blocks are connected between the inner tube body and the outer tube body; and the lower end of the outer pipe body of the hydraulic packer at the lowest stage is provided with a sieve mesh communicated with the annular flow channel.
4. The multi-stage hydraulic setting co-well injection and production system pipe column according to claim 1, characterized in that: the water injection control device comprises a main body, a constant-flow plug, a safety valve and a time-delay automatic valve, wherein the constant-flow plug is arranged in a groove in the outer wall of the main body and is communicated with an inner cavity of the main body and an external water injection layer.
5. The multi-stage hydraulic setting same-well injection-production system pipe column according to claim 4, characterized in that: a long hole for installing the delay automatic valve is axially formed in the pipe wall of the main body, the delay automatic valve comprises a slide valve, a spring, a stop block, a soluble metal body and a lock cap, the spring, the slide valve and the soluble metal body are sequentially arranged in the long hole, the stop block is arranged at one end of the long hole and used for pressing the spring, the lock cap is arranged at the other end of the long hole and used for supporting the soluble metal body, and a through hole is formed in the lock cap;
the pipe wall of the main body is provided with a first communicating hole for communicating the inner cavity of the main body with the long hole and a second communicating hole for communicating the long hole with the outside of the main body, the slide valve is a columnar body, and a communicating cavity is arranged in the slide valve; before the soluble metal body is dissolved, the first communicating hole, the communicating cavity and the second communicating hole are communicated to form a flow passage; after the soluble metal body is dissolved, the slide valve moves, and the overflowing channel is disconnected.
6. The multi-stage hydraulic setting same-well injection-production system pipe column according to claim 5, characterized in that: the first communicating hole and the second communicating hole are arranged in a vertically staggered mode, two stages of sealing rings are arranged on the sliding valve and are respectively located on the upper side and the lower side of the communicating cavity, and the first communicating hole and the second communicating hole are located between the two stages of sealing rings before the soluble metal body is dissolved; after the soluble metal body is dissolved, the primary sealing ring is positioned between the first communicating hole and the second communicating hole.
7. The multi-stage hydraulic setting co-well injection and production system pipe column according to claim 1, characterized in that: the tubular column centering device comprises a friction plate central tube, a friction body, a rectangular spring, a friction plate and a pressure ring, wherein the friction body is fixedly sleeved on the outer side of the friction plate central tube, and a groove for mounting the rectangular spring and the friction plate is formed in the outer wall of the friction body; the rectangular spring is arranged on the inner side of the friction plate, and the friction plate is pressed in a groove on the outer wall of the friction body through a pressing ring; the friction plates are arranged on the outer wall of the friction body in a circumferential array.
8. The multi-stage hydraulic setting same-well injection-production system pipe column according to claim 1, characterized in that: the hydraulic anchoring device comprises an anchor body, a tension spring, a pressing sheet and an anchor claw, wherein a plurality of holes for mounting the tension spring and the anchor claw are formed in the outer wall of the anchor body, and the anchor claw and the tension spring are limited in the holes in the outer wall of the anchor body through the pressing sheet; and the hole bottom is provided with a through hole communicated with the inner cavity of the anchor body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310092622.0A CN115822508A (en) | 2023-02-10 | 2023-02-10 | Multi-stage hydraulic setting co-well injection and production system pipe column |
| CN202321425690.6U CN219993668U (en) | 2023-02-10 | 2023-06-06 | Multi-stage hydraulic setting same-well injection and production system pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310092622.0A CN115822508A (en) | 2023-02-10 | 2023-02-10 | Multi-stage hydraulic setting co-well injection and production system pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN115822508A true CN115822508A (en) | 2023-03-21 |
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|---|---|---|---|
| CN202310092622.0A Pending CN115822508A (en) | 2023-02-10 | 2023-02-10 | Multi-stage hydraulic setting co-well injection and production system pipe column |
| CN202321425690.6U Active CN219993668U (en) | 2023-02-10 | 2023-06-06 | Multi-stage hydraulic setting same-well injection and production system pipe column |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321425690.6U Active CN219993668U (en) | 2023-02-10 | 2023-06-06 | Multi-stage hydraulic setting same-well injection and production system pipe column |
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| CN (2) | CN115822508A (en) |
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| CN2846725Y (en) * | 2005-09-23 | 2006-12-13 | 高守君 | Recovery type high temperature high pressure packer |
| WO2016033983A1 (en) * | 2014-09-04 | 2016-03-10 | 杰瑞能源服务有限公司 | Coiled tubing fracturing multistage tool string and utilization method |
| CN112240194A (en) * | 2020-11-17 | 2021-01-19 | 东北石油大学 | Multi-stage oil-water separation and same-well injection-production method in horizontal shaft |
| CN114109329A (en) * | 2021-12-01 | 2022-03-01 | 东北石油大学 | Injection-production same-well device and injection-production same-well system |
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| CN115573684A (en) * | 2022-11-18 | 2023-01-06 | 山东圣颐石油技术开发有限公司 | Device for automatically closing overcurrent at fixed time and using method thereof |
| CN115613995A (en) * | 2022-12-16 | 2023-01-17 | 山东圣颐石油技术开发有限公司 | Multi-stage low-pressure driven double-working-flow-channel packer |
-
2023
- 2023-02-10 CN CN202310092622.0A patent/CN115822508A/en active Pending
- 2023-06-06 CN CN202321425690.6U patent/CN219993668U/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2846725Y (en) * | 2005-09-23 | 2006-12-13 | 高守君 | Recovery type high temperature high pressure packer |
| WO2016033983A1 (en) * | 2014-09-04 | 2016-03-10 | 杰瑞能源服务有限公司 | Coiled tubing fracturing multistage tool string and utilization method |
| CN112240194A (en) * | 2020-11-17 | 2021-01-19 | 东北石油大学 | Multi-stage oil-water separation and same-well injection-production method in horizontal shaft |
| CN114109329A (en) * | 2021-12-01 | 2022-03-01 | 东北石油大学 | Injection-production same-well device and injection-production same-well system |
| CN115306344A (en) * | 2022-08-17 | 2022-11-08 | 山东圣颐石油技术开发有限公司 | Prestress packing integrated device with double channels and using method thereof |
| CN115573684A (en) * | 2022-11-18 | 2023-01-06 | 山东圣颐石油技术开发有限公司 | Device for automatically closing overcurrent at fixed time and using method thereof |
| CN115613995A (en) * | 2022-12-16 | 2023-01-17 | 山东圣颐石油技术开发有限公司 | Multi-stage low-pressure driven double-working-flow-channel packer |
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| CN219993668U (en) | 2023-11-10 |
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Application publication date: 20230321 |