CN115773086A - Upper lifting type tension setting co-well injection and production system pipe column - Google Patents
Upper lifting type tension setting co-well injection and production system pipe column Download PDFInfo
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- CN115773086A CN115773086A CN202310094590.8A CN202310094590A CN115773086A CN 115773086 A CN115773086 A CN 115773086A CN 202310094590 A CN202310094590 A CN 202310094590A CN 115773086 A CN115773086 A CN 115773086A
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- 238000002347 injection Methods 0.000 title claims abstract description 74
- 239000007924 injection Substances 0.000 title claims abstract description 74
- 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 55
- 238000004873 anchoring Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 59
- 239000002184 metal Substances 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000003129 oil well Substances 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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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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Abstract
The invention discloses an upper lifting type tension setting co-well injection and production system pipe column, which relates to the technical field of oil production pipe columns in oil fields and comprises an upper adjusting joint, tension packers, blowout preventers, tension anchoring devices, a lower supporting joint and a well completion device, wherein the upper adjusting joint, the tension packers, the blowout preventers, the tension anchoring devices and the lower supporting joint are sequentially connected from top to bottom; an oil-way channel and a water-way channel are arranged in the pipe column of the lifting type tension setting co-well injection and production system, after oil-well liquid is separated by an underground oil-water separation facility, oil enters the oil-way channel, flows to the annular 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 an upper-lifting type tension setting same-well injection and production system pipe column.
Background
In the middle and later stages of oil field exploitation, the water content of 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, reduce the production cost and solve the problems of multistage use of a tension pipe column system packer, separate-layer water injection, packer seal inspection and the like which cannot be solved by the prior art, a novel injection and production system pipe column in the same well is urgently needed to be developed.
Disclosure of Invention
The invention provides an upward-lifting tension setting co-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: an upper lifting type tension setting co-well injection and production system pipe column comprises an upper adjusting joint, a tension packer, a blowout preventer, a tension anchoring device, a lower support joint and a well completion device, wherein the upper adjusting joint, the tension packer, the blowout preventer, the tension anchoring device and the lower support joint are sequentially connected from top to bottom;
an oil path channel and a water path channel are arranged in the pipe column of the lifting type tension setting co-well injection-production system, an oil path inlet of the oil path channel is a sieve mesh on the outer wall of the blowout preventer, and an oil path outlet of the oil path channel is a sieve mesh on the outer wall of the adjusting upper joint; waterway channel's water route entry is the hole lower extreme that the lower stay connects, and the water route export is water injection controlling means's outer wall export.
Preferably, the well completion device comprises a connecting part and a lifting rod part, wherein the connecting part comprises an oil pipe hanger, an outer cylinder body, a sealing head and a sealing pipe, the oil pipe hanger, the outer cylinder body and the sealing head are sequentially and fixedly connected from top to bottom, and the sealing pipe is arranged in an inner cavity of the outer cylinder body in a sliding manner and is connected with the sealing head in a sliding and sealing manner; the lifting rod part comprises a first coupling, a lifting rod and a lifting rod head which are sequentially connected from top to bottom, the lifting rod part can be inserted into the outer cylinder body through an oil pipe hanger, and the lifting rod head can be in butt joint with the upper end of the sealing pipe.
Preferably, the tension packer comprises an oil pipe, a lower joint, a first central pipe, an outer central pipe, a key sleeve, a rubber sleeve, a positioning sleeve, a snapping pin, an adjusting ring and an upper joint, the outer central pipe is slidably sleeved on the outer side of the first central pipe, the lower end of the first central pipe is slidably arranged on the inner wall of the lower joint, a plurality of keys are embedded in the middle of the first central pipe, and the upper end of the first central pipe is fixedly connected with the upper joint; the lower end of the outer central pipe is fixedly connected with the upper part of the lower joint, the middle part of the outer central pipe is provided with a plurality of axial long round holes which are used as sliding tracks of a plurality of keys, and the upper end of the outer central pipe is fixedly connected with the positioning sleeve; the key is arranged in the long round hole in a sliding mode, the outer side of the lower portion of the upper joint is fixedly connected with the adjusting ring, the adjusting ring is connected with the positioning sleeve through a plurality of breaking pins, the upper end of the key sleeve is sleeved on the outer central tube in a sliding mode, and the lower end of the key sleeve is fixedly connected with the plurality of keys; the plurality of rubber cylinders are sleeved on the outer central tube between the positioning sleeve and the key sleeve, and a spacer ring is arranged between the rubber cylinders; when the snapping pin is not broken, the key is positioned at the lower end of the long round hole;
the oil pipe is positioned in the inner cavity of the first central pipe, the oil pipe and the first central pipe are coaxially arranged, and an annular flow passage is arranged between the oil pipe and the first central pipe;
according to the sequence from bottom to top, the strength of the broken pins of each stage of tension packer is sequentially increased, and the tensile packers are sequentially set according to the sequence from bottom to top; the upper joint of the uppermost tension packer is connected with the lower end of the sealing pipe through an adjusting upper joint.
Preferably, the water injection control device comprises a main body, a constant-flow plug, a safety valve and a delay automatic valve, wherein a long flow channel which is axially communicated is arranged in the pipe wall of the main body, the constant-flow plug is arranged in a groove on the outer wall of the main body and is communicated with the inner cavity of the main body and an external water injection layer;
the upper end and the lower end of the main body are respectively connected with the lower joint of the upper side tension packer and the upper joint of the lower side tension packer, and the two ends of the inner wall of the main body are connected with the corresponding end parts of the oil pipe through the telescopic pipes.
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 overflowing channel; 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 at 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 blowout preventer comprises an external pipe string and an internal pipe string positioned in the external pipe string, wherein the external pipe string comprises an external joint, a sliding pipe, an oil circuit external pipe, an oil circuit control body, a lower outer sleeve and a friction centralizing mechanism which are sequentially connected from top to bottom; the inner pipe string comprises an inner joint, an oil way inner pipe, an oil pipe sealing plug coupling and a second central pipe which are sequentially connected from top to bottom, the bottom of the oil way inner pipe is connected with the bottom of the sliding pipe, and the bottom of the second central pipe extends out of the cavity of the friction righting mechanism and then is connected with a lower support joint for being matched with the tension anchoring device for seat sealing;
an oil inlet channel is arranged between the external pipe string and the internal pipe string, and comprises an annulus between the external joint and the internal joint, an annulus between the oil circuit inner pipe and the sliding pipe, a groove channel formed at the bottom of the sliding pipe, and an annulus between the oil circuit outer pipe, the oil pipe sealing plug coupling and the second central pipe; the oil way control body is provided with an oil inlet hole communicated with the oil inlet channel;
a vertical guide rail groove is formed in the outer peripheral surface of the second central tube, and a rail pin which extends into the guide rail groove and is in sliding fit with the guide rail groove is arranged on the inner side of the oil way control body;
when the rail pin is positioned in the upper vertical groove, the oil pipe sealing plug coupling is in sliding sealing fit with the oil way control body, and an oil inlet hole in the oil way control body is plugged;
when the rail pin slides to the bottom of the vertical groove at the lower part, the oil pipe sealing plug coupling is separated from the oil way control body to open the oil inlet hole, and meanwhile, the lower support joint moves upwards to push the tension anchoring device to be sealed;
the external joint is connected with the lower joint of the upper side tension packer, and the internal joint is connected with an oil pipe of the upper side tension packer through a telescopic pipe.
Preferably, the friction righting mechanism comprises a cylindrical body and a group of friction plates which are connected to the cylindrical body in a sliding mode along the radial direction, and a supporting spring is arranged between each friction plate and the cylindrical 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 tension packers can be connected in series up and down in multiple stages to realize separate-layer water injection; the multistage tension packers used in series connection are sequentially set according to the sequence from bottom to top, and the multistage packers can be set and unset at one time by lifting and lowering the pipe column; the time-delay automatic valve can be automatically closed according to the design time, and whether the packer is set 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 is closed, so that the seal inspection of the multi-stage tension packer is realized; the pipe column is lifted by using a special accessory, so that the anchoring seat sealing of the pipe column is realized; the whole well pipe string is in a stretching state after completion, so that the spiral bending phenomenon of the pipe string is eliminated; the water injection control device can adjust and control the water injection amount of each water injection layer according to the injection requirement of the water injection layer; the safety valve can release pressure when the water injection pressure is over-pressure, so that the overload of the pipe column is prevented.
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 diagram of a tension packer construction;
FIG. 4 is a schematic structural diagram of a water injection control device;
FIG. 5 is a schematic illustration of the configuration of the blowout preventer, tension anchor and lower support sub;
fig. 6 is a schematic diagram of the construction of the completion device.
In the figure: 1. a well completion device, 101, a tubing hanger, 102, an outer cylinder body, 103, a sealing pipe, 104, a sealing head, 111, a first coupling, 112, a lifting rod, 113, a lifting rod head, 2, an adjusting upper joint, 3, a tension packer, 301, a lower joint, 302, a first central pipe, 303, an outer central pipe, 304, a key, 305, a key sleeve, 306, a rubber sleeve, 307, a positioning sleeve, 308, a snapping pin, 309, an adjusting ring, 310, an upper joint, 311, an oil pipe, 4, a water injection control device, 41, a constant flow plug, 42, a safety valve, 421, a plug, 422, a sealing block, 423, a pressure spring, 424, a valve ball, 43 and a time delay automatic valve, 431, a soluble metal body, 432, a slide valve, 433, a spring, 434, a stop block, 435, a lock cap, 44, a main body, 441, a first communication hole, 442, a second communication hole, 443, a communication cavity, 5, a blowout preventer, 501, an external joint, 502, an internal joint, 503, an oil circuit internal pipe, 504, a sliding pipe, 505, an oil circuit external pipe, 506, an oil circuit control body, 507, an oil pipe sealing plug collar, 508, a second central pipe, 509, a rail pin, 510, a lower outer sleeve, 511, a cylindrical body, 512, a friction plate, 513, a supporting spring, 514, a guide rail groove, 515, a groove channel, 6, a tension anchoring device, 7 and a lower support joint.
K11, a water path inlet, K12, a water path outlet, K21, an oil path inlet, K22, an oil path outlet, L1, a water path channel, and L2, an oil path channel.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the drawings.
Example one
Referring to fig. 1-6, the lifting type tension setting co-well injection-production system pipe column comprises an upper adjusting joint 2, tension packers 3, a blowout preventer 5, a tension anchoring device 6, a lower support joint 7 and a well completion device 1, wherein the upper adjusting joint 2, the tension packers 3, the blowout preventer 5, the tension anchoring device 6 and the lower support joint 7 are sequentially connected from top to bottom;
an oil path channel L2 and a water path channel L1 are arranged in the pipe column of the lifting type tension setting co-well injection and production system, an oil path inlet K21 of the oil path channel L2 is a sieve pore on the outer wall of the blowout preventer 5, and an oil path outlet K22 is a sieve pore for adjusting the outer wall of the upper joint 2; a waterway inlet K11 of the waterway channel L1 is the lower end of an inner hole of the lower support joint 7, and a waterway outlet K12 is an outer wall outlet of the water injection control device 4; after the oil well fluid is separated by the underground oil-water separation facility, the oil enters an oil path channel L2, flows to the annular sleeve space through an oil path outlet K22 and is extracted through an oil well pump; water enters the waterway channel L1 and is injected into the stratum through the waterway outlet K12 after reaching the water injection layer.
The well completion device 1 comprises a connecting part and a lifting rod part, wherein the connecting part comprises an oil pipe hanger 101, an outer cylinder 102, a sealing head 104 and a sealing pipe 103, the oil pipe hanger 101, the outer cylinder 102 and the sealing head 104 are sequentially and fixedly connected from top to bottom, and the sealing pipe 103 is slidably arranged in the inner cavity of the outer cylinder 102 and is in sliding sealing connection with the sealing head 104; the lifting rod part comprises a first collar 111, a lifting rod 112 and a lifting rod head 113 which are sequentially connected from top to bottom, the lifting rod part can be inserted into the outer cylinder body 102 through the tubing hanger 101, and the lifting rod head 113 can be butted with the upper end of the sealing tube 103.
The tension packer 3 comprises an oil pipe 311, a lower joint 301, a first central pipe 302, an outer central pipe 303, a key 304, a key sleeve 305, a rubber sleeve 306, a positioning sleeve 307, a snapping pin 308, an adjusting ring 309 and an upper joint 310, wherein the outer central pipe 303 is slidably sleeved on the outer side of the first central pipe 302, the lower end of the first central pipe 302 is slidably arranged on the inner wall of the lower joint 301, the middle part of the first central pipe is inlaid with the key 304, and the upper end of the first central pipe is fixedly connected with the upper joint 310; the lower end of the outer central tube 303 is fixedly connected with the upper part of the lower connector 301, the middle part of the outer central tube is provided with a plurality of axial long round holes which are used as sliding tracks of a plurality of keys 304, and the upper end of the outer central tube is fixedly connected with a positioning sleeve 307; the key 304 is arranged in the slotted hole in a sliding manner, the outer side of the lower part of the upper joint 310 is fixedly connected with the adjusting ring 309, the adjusting ring 309 is connected with the positioning sleeve 307 through a plurality of snapping pins 308, the upper end of the key sleeve 305 is sleeved on the outer central tube 303 in a sliding manner, and the lower end of the key sleeve 305 is fixedly connected with the plurality of keys 304; a plurality of rubber cylinders 306 are sleeved on the outer central tube 303 between the positioning sleeve 307 and the key sleeve 305, and a spacer ring is arranged between the rubber cylinders 306; when the snap pin 308 is not broken, the key 304 is located at the lower end of the oblong hole;
the oil pipe 311 is positioned in the inner cavity of the first central pipe 302, the two are coaxially arranged, and an annular flow channel is arranged between the two;
according to the sequence from bottom to top, the strength of the snapping pin 308 of each stage of tension packer 3 is sequentially increased, and the tensioning pin 308 is sequentially set according to the sequence from bottom to top; the upper sub 310 of the uppermost tension packer 3 is connected to the lower end of the seal tube 103 by adjusting the upper sub 2.
The water injection control device 4 comprises a main body 44, a constant-flow plug 41, a safety valve 42 and a delayed automatic valve 43, wherein a long flow channel which is axially communicated is arranged in the pipe wall of the main body 44, the constant-flow plug 41 is arranged in a groove on the outer wall of the main body 44 and is communicated with the inner cavity of the main body 44 and an external water injection layer;
the upper end and the lower end of the main body 44 are respectively connected with the lower joint 301 of the upper side tension packer 3 and the upper joint 310 of the lower side tension packer 3, and the two ends of the inner wall of the main body 44 are connected with the end parts of the oil pipes 311 through telescopic pipes.
A long hole for installing the delay automatic valve 43 is axially arranged in the pipe wall of the main body 44, the delay automatic valve 43 comprises a sliding valve 432, a spring 433, a stop 434, a soluble metal body 431 and a lock cap 435, the spring 433, the sliding valve 432 and the soluble metal body 431 are sequentially arranged in the long hole, the stop 434 is installed at one end of the long hole and used for pressing the spring 433, the lock cap 435 is installed at the other end of the long hole and used for supporting the soluble metal body 431, and a through hole is formed in the lock cap 435;
the tube wall of the main body 44 is provided with a first communicating hole 441 for communicating the inner cavity of the main body 44 with the long hole and a second communicating hole 442 for communicating the long hole with the outside of the main body 44, the slide valve 432 is a column-shaped body, and the inside of the slide valve is provided with a communicating cavity 443; before the soluble metal body 431 is dissolved, the first communication hole 441, the communication cavity 443 and the second communication hole 442 are communicated to form a flow passage; after the soluble metal body 431 is dissolved, the slide valve 432 moves and the flow passage is opened.
After the multistage tension packer 3 is set, whether the tension packer 3 completes setting or not can be judged according to the change of the injection pump load caused by the change of the water injection pressure before and after the time delay automatic valve 43 is closed, so that the seal checking work of the packer is realized. The closing time of each time delay automatic valve 43 is different by adjusting the dissolving time of the soluble metal body 431 of the time delay automatic valve 43, thereby realizing the sectional seal inspection of each level of packers of the whole pipe column.
The blowout preventer 5 comprises an external pipe string and an internal pipe string positioned in the external pipe string, wherein the external pipe string comprises an external joint 501, a sliding pipe 504, an oil circuit external pipe 505, an oil circuit control body 506, a lower outer sleeve 510 and a friction centralizing mechanism which are sequentially connected from top to bottom; the inner pipe string comprises an inner joint 502, an oil-way inner pipe 503, an oil pipe sealing plug coupling 507 and a second central pipe 508 which are sequentially connected from top to bottom, the bottom of the oil-way inner pipe 503 is connected with the bottom of the sliding pipe 504, and the bottom of the second central pipe 508 extends out of the cavity of the friction righting mechanism and then is connected with a lower support joint 7 for being matched with and seated with the tension anchoring device 6;
an oil inlet channel is arranged between the outer pipe string and the inner pipe string, and comprises an annulus between the outer joint 501 and the inner joint 502, an annulus between the oil circuit inner pipe 503 and the sliding pipe 504, a groove channel formed at the bottom of the sliding pipe 504, and an annulus between the oil circuit outer pipe 505 and the oil pipe sealing plug coupling 507 as well as the second central pipe 508; an oil inlet hole communicated with the oil inlet channel is formed in the oil way control body 506;
a vertical guide rail groove is formed in the outer peripheral surface of the second center tube 508, and a rail pin 509 which extends into the guide rail groove and is in sliding fit with the guide rail groove is arranged on the inner side of the oil path control body 506;
when the rail pin 509 is positioned at the top of the guide rail groove, the oil pipe sealing plug coupling 507 is in sliding sealing fit with the oil path control body 506 and plugs an oil inlet hole on the oil path control body 506;
when the rail pin 509 slides to the bottom of the guide rail groove, the oil pipe sealing plug coupling 507 is separated from the oil path control body 506 to open the oil inlet hole, and meanwhile, the lower support joint 7 moves upwards to push the tension anchoring device 6 to be seated;
the outer joint 501 is connected to the lower joint 301 of the upper tension packer 3 and the inner joint 502 is connected to the tubing 311 of the upper tension packer 3 by means of a telescoping tube.
The oil passage L2 is formed by connecting an oil inlet passage, an annular flow passage of the tension packer 3 and a long flow passage of the main body 44 of the water injection control device 4, and the water passage L1 is formed by connecting an inner cavity of the lower support joint 7, an inner cavity of the second central tube 508, an inner cavity of the oil passage inner tube 503, an inner cavity of the oil pipe 311 and an inner cavity of the main body 44.
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 oil pipe is lowered to a preset position, a lifting rod part of the well completion device 1 penetrates from the top of the oil pipe hanger 101 and is in butt joint with the sealing pipe 103, then the lifting rod part is lifted, the integral pipe column is pulled to lift, the rail pin 509 slides from the top of the guide rail groove to the bottom of the guide rail groove, at the moment, the lower supporting joint drives the tension anchoring device 6 to be seated, the oil pipe sealing plug coupling 507 is separated from the oil way control body 506, and the oil inlet hole is opened;
and next, continuously lifting the lifting rod part, so that the tension packers 3 at all levels are linked to sequentially perform setting from bottom to top, and multi-stage packing is realized: after the snap pin 308 is snapped, the first central tube 302 drives the key 304 to move upwards along the long circular hole, and simultaneously pushes the key sleeve 305 to move upwards to press the rubber cylinder 306, so that the rubber cylinder is expanded to complete setting;
next, each delayed automatic valve 43 completes closing 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 43 is closed, whether the two-stage tension packers 3 of the reinjection layer corresponding to the time delay automatic valve 43 complete setting or not can be judged, and if the load of the injection pump is increased, the two-stage tension packers 3 complete setting is indicated; if the load of the injection pump is not changed, the condition that setting is not finished in the two-stage tension packer 3 is indicated; and (4) checking the seal step by step according to the closing time of each delay automatic valve 43.
And next, after the seal checking work of the tension packers 3 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 tension packers 3 can be connected in series up and down in multiple stages to realize separated layer water injection; the tension packers 3 used in series are sequentially set at all levels according to the sequence from bottom to top, and the multi-level packer can be set and unset at one time by lifting and lowering the pipe column; the delay automatic valve 43 can be automatically closed according to the design time, and whether the packer is set 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 delay automatic valve 43 is closed, so that the seal inspection of the multistage tension packer 3 is realized; the pipe column is lifted by using a special accessory, so that the anchoring seat sealing of the pipe column is realized; the whole well pipe column is in a stretching state after completion, so that the spiral bending phenomenon of the pipe column is eliminated; the water injection control device 4 can adjust and control the water injection amount of each water injection layer according to the injection requirement of the water injection layer; the safety valve 42 allows pressure relief when the injection pressure is over-pressurized, preventing overloading of the string.
Example two
As a preferred embodiment of the present invention, the present embodiment optimally designs the structures of the friction centralizing mechanism and the tension anchoring device 6 on the basis of the first embodiment, specifically:
referring to fig. 5, in the present embodiment, the friction centering mechanism includes a cylindrical body 511 and a set of friction plates 512 slidably coupled to the cylindrical body 511 in a radial direction, and a support spring 513 is provided between the friction plates 512 and the cylindrical body 511.
The tension anchoring device 6 comprises a slip seat, a group of slip blocks are connected to the slip seat along the radial direction in an elastic sliding manner, when the lower supporting joint moves upwards, the inclined plane at the ascending top of the lower supporting joint is contacted with the inclined plane at the bottom of the slip blocks, the slip blocks are pushed to be unfolded along the radial direction to the outer side, and the slip blocks are supported on the inner wall of the sleeve to realize seat sealing.
EXAMPLE III
As a preferred embodiment of the present invention, in this embodiment, the structure of the safety valve 42 is optimally designed on the basis of the first embodiment, specifically:
referring to fig. 4, in the present embodiment, the relief valve 42 is installed in an axially elongated hole in the outer wall of the main body 44 of the water injection control device 4, and includes a plug 421, a seal block 422, a compression spring 423, and a valve ball 424. The safety valve 42 has two functions, one is a one-way valve function, a liquid channel entering the inner cavity from the outside of the water injection control device 4 is blocked by the pressure spring 423 and the valve ball 424, and liquid can only enter the outer cavity from the inner cavity of the water injection control device 4 through the liquid channel; secondly, the safety valve 42 is used, when the overpressure of the liquid pressure in the inner cavity of the water injection control device 4 reaches a designed release value, the valve ball 424 is opened, and the inner cavity channel and the outer cavity channel of the water injection control device 4 are communicated to release the pressure.
Example four
As a preferred embodiment of the present invention, the present embodiment optimally designs the structure of the automatic delay valve 43 on the basis of the first embodiment, specifically:
referring to fig. 4, in the present embodiment, the first communication hole 441 and the second communication hole 442 of the delay automatic valve 43 are vertically displaced.
In addition, the slide valve 432 is provided with two-stage sealing rings which are respectively positioned at the upper side and the lower side of the communicating cavity 443, and before the soluble metal body 431 is dissolved, the first communicating hole 441 and the second communicating hole 442 are both positioned between the two-stage sealing rings; after the soluble metal body 431 is dissolved, the primary seal ring is located between the first communication hole 441 and the second communication hole 442.
After the delay automatic valve 43 is closed, the packing interposed between the first and second communication holes 441 and 442 improves the sealing performance of the spool valve 432 after it is closed.
EXAMPLE five
The lower well string of this embodiment is equipped with three tension packer 3 and two water injection controlling means 4 that correspond, and three tension packer 3 from the top down is one-level packer, second grade packer and tertiary packer in proper order, and two water injection controlling means 4 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, 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 unchanged, the first-stage packer and the second-stage packer are unfinished in setting; 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 an it seals with well notes system's tubular column to go up formula tension setting, includes from top to bottom regulation top connection, tension packer, preventer, tension anchoring device and the lower joint that props that connects gradually, its characterized in that: the tension packer is provided with a plurality of stages, the tension packers are connected in series up and down, and a water injection control device is arranged between the adjacent tension packers;
an oil path channel and a water path channel are arranged in the pipe column of the lifting type tension setting co-well injection-production system, an oil path inlet of the oil path channel is a sieve mesh on the outer wall of the blowout preventer, and an oil path outlet of the oil path channel is a sieve mesh on the outer wall of the adjusting upper joint; the waterway inlet of the waterway channel is the lower end of the inner hole of the lower support joint, and the waterway outlet is the outlet of the outer wall of the water injection control device.
2. The upward tension setting co-well injection and production system tubular column of claim 1, wherein: the well completion device comprises a connecting part and a lifting rod part, wherein the connecting part comprises an oil pipe hanger, an outer cylinder body, a sealing head and a sealing pipe, the oil pipe hanger, the outer cylinder body and the sealing head are sequentially and fixedly connected from top to bottom, and the sealing pipe is arranged in an inner cavity of the outer cylinder body in a sliding manner and is connected with the sealing head in a sliding and sealing manner; the lifting rod part comprises a first coupling, a lifting rod and a lifting rod head which are sequentially connected from top to bottom, the lifting rod part can be inserted into the outer cylinder body through an oil pipe hanger, and the lifting rod head can be in butt joint with the upper end of the sealing pipe.
3. The upward tension setting co-well injection and production system tubular column of claim 2, wherein: the tension packer comprises an oil pipe, a lower joint, a first central pipe, an outer central pipe, a key sleeve, a rubber barrel, a positioning sleeve, a snapping pin, an adjusting ring and an upper joint, wherein the outer central pipe is slidably sleeved on the outer side of the first central pipe, the lower end of the first central pipe is slidably arranged on the inner wall of the lower joint, a plurality of keys are embedded in the middle of the first central pipe, and the upper end of the first central pipe is fixedly connected with the upper joint; the lower end of the outer central tube is fixedly connected with the upper part of the lower joint, the middle part of the outer central tube is provided with a plurality of axial long round holes which are used as sliding tracks of a plurality of keys, and the upper end of the outer central tube is fixedly connected with the positioning sleeve; the key is arranged in the long round hole in a sliding mode, the outer side of the lower portion of the upper joint is fixedly connected with the adjusting ring, the adjusting ring is connected with the positioning sleeve through a plurality of breaking pins, the upper end of the key sleeve is sleeved on the outer central tube in a sliding mode, and the lower end of the key sleeve is fixedly connected with the plurality of keys; the rubber cylinders are sleeved on the outer central tube between the positioning sleeve and the key sleeve, and a spacer ring is arranged between the rubber cylinders; when the snapping pin is not broken, the key is positioned at the lower end of the long round hole;
the oil pipe is positioned in the inner cavity of the first central pipe, the first central pipe and the second central pipe are coaxially arranged, and an annular flow passage is arranged between the first central pipe and the second central pipe;
according to the sequence from bottom to top, the strength of the broken pin of each stage of tension packer is sequentially increased, and the tension packers are sequentially set according to the sequence from bottom to top; the upper joint of the uppermost tension packer is connected with the lower end of the sealing pipe through an adjusting upper joint.
4. The upward tension setting co-well injection and production system tubular column of claim 3, wherein: the water injection control device comprises a main body, a constant-flow plug, a safety valve and a time-delay automatic valve, wherein a long flow channel which is axially communicated is arranged in the pipe wall of the main body, and the constant-flow plug is arranged in a groove on the outer wall of the main body and is communicated with an inner cavity of the main body and an external water injection layer;
the upper end and the lower end of the main body are respectively connected with the lower joint of the upper side tension packer and the upper joint of the lower side tension packer, and the two ends of the inner wall of the main body are connected with the corresponding end parts of the oil pipe through the telescopic pipes.
5. The upward-lifting tension setting co-well injection and production system tubular column according to claim 4, characterized in that: the automatic delay valve comprises a slide valve, a spring, a stop block, a soluble metal body and a lock cap, wherein the spring, the slide valve and the soluble metal body are sequentially arranged in the long hole;
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 is moved, and the overflow channel is cut off.
6. The upward tension setting co-well injection and production system tubular column of claim 5, wherein: 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 slide 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 upward-lifting tension setting co-well injection and production system tubular column according to claim 3, characterized in that: the blowout preventer comprises an external pipe string and an internal pipe string positioned in the external pipe string, wherein the external pipe string comprises an external joint, a sliding pipe, an oil circuit external pipe, an oil circuit control body, a lower outer sleeve and a friction centralizing mechanism which are sequentially connected from top to bottom; the inner pipe string comprises an inner joint, an oil way inner pipe, an oil pipe sealing plug coupling and a second central pipe which are sequentially connected from top to bottom, the bottom of the oil way inner pipe is connected with the bottom of the sliding pipe, and the bottom of the second central pipe extends out of the cavity of the friction righting mechanism and then is connected with a lower support joint for being matched with the tension anchoring device for seat sealing;
an oil inlet channel is arranged between the external pipe string and the internal pipe string and comprises an annulus between the external joint and the internal joint, an annulus between the oil circuit inner pipe and the sliding pipe, a groove channel formed at the bottom of the sliding pipe and an annulus between the oil circuit outer pipe, the oil pipe sealing plug coupling and the second central pipe; the oil way control body is provided with an oil inlet hole communicated with the oil inlet channel;
a vertical guide rail groove is formed in the peripheral surface of the second central pipe, and a rail pin which extends into the guide rail groove and is in sliding fit with the guide rail groove is arranged on the inner side of the oil way control body;
when the rail pin is positioned in the upper vertical groove, the oil pipe sealing plug coupling is in sliding sealing fit with the oil way control body, and an oil inlet hole in the oil way control body is plugged;
when the rail pin slides to the bottom of the vertical groove at the lower part, the oil pipe sealing plug coupling is separated from the oil way control body to open the oil inlet hole, and meanwhile, the lower support joint moves upwards to push the tension anchoring device to be sealed;
the external joint is connected with the lower joint of the upper side tension packer, and the internal joint is connected with an oil pipe of the upper side tension packer through a telescopic pipe.
8. The upward tension setting co-well injection and production system tubular column of claim 7, wherein: the friction righting mechanism comprises a cylindrical body and a group of friction plates which are connected to the cylindrical body in a sliding mode along the radial direction, and a supporting spring is arranged between each friction plate and the cylindrical body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310094590.8A CN115773086A (en) | 2023-02-10 | 2023-02-10 | Upper lifting type tension setting co-well injection and production system pipe column |
| CN202321425470.3U CN220015119U (en) | 2023-02-10 | 2023-06-06 | Lifting type tension setting same-well injection and production system pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310094590.8A CN115773086A (en) | 2023-02-10 | 2023-02-10 | Upper lifting type tension setting co-well injection and production system pipe column |
Publications (1)
| Publication Number | Publication Date |
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| CN115773086A true CN115773086A (en) | 2023-03-10 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310094590.8A Pending CN115773086A (en) | 2023-02-10 | 2023-02-10 | Upper lifting type tension setting co-well injection and production system pipe column |
| CN202321425470.3U Active CN220015119U (en) | 2023-02-10 | 2023-06-06 | Lifting type tension setting same-well injection and production system pipe column |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321425470.3U Active CN220015119U (en) | 2023-02-10 | 2023-06-06 | Lifting type tension setting same-well injection and production system pipe column |
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| CN (2) | CN115773086A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117536590A (en) * | 2023-12-07 | 2024-02-09 | 盐城市弘通石油机械有限公司 | Bridge type concentric water distributor |
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| CN114856515A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气股份有限公司 | Water injection well pipe column and control method thereof |
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| CN220015119U (en) | 2023-11-14 |
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