CN216517889U - Can realize workover rig of interim well shutoff, kill - Google Patents
Can realize workover rig of interim well shutoff, kill Download PDFInfo
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- CN216517889U CN216517889U CN202122578204.1U CN202122578204U CN216517889U CN 216517889 U CN216517889 U CN 216517889U CN 202122578204 U CN202122578204 U CN 202122578204U CN 216517889 U CN216517889 U CN 216517889U
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Abstract
The utility model discloses a workover rig capable of realizing temporary well sealing and killing, which consists of a workover rig body, wherein the workover rig comprises a temporary well sealing and killing workover tubular column, and the tubular column is sequentially provided with a hydraulically releasable well killing tieback sealing barrel, a well killing float shoe, a plug valve, a well sealing device seat sealing mechanism, a well sealing device and a mechanically releasable well killing tieback device from bottom to top; the tieback sealing barrel, the plug valve, the well killing float shoe and the well sealer setting mechanism are connected by API casing threads; the blowout preventer and the blowout preventer seat sealing mechanism are connected by adopting a left-hand special thread; the utility model can realize the connection between the oil well casing pipes quickly and efficiently, and can realize the recovery of the device with high quality.
Description
Technical Field
The utility model belongs to an auxiliary tool for temporarily treating an oil field well, and particularly relates to a well repairing device capable of realizing temporary well sealing and killing and an application method thereof.
Background
Aiming at the development of offshore oil fields, the offshore oil field development method has the factors of high development cost, high operation risk, high requirement on environmental pollution and the like. Oil wells and gas wells are required to be safe in operation and construction no matter in development or well repair stages, and pollution to marine environment cannot be caused. But damage to the casing above the sea level of the oil and gas well can result from some special well conditions or accidents on the offshore platform. And generally, well abandonment is not an option due to the high development cost of offshore oil and gas well investment. The repair and tieback of the wellhead casing may be selected. And after the well mouth casing pipe is repaired and connected back, the well mouth is rebuilt, and the accident well is put into production again. Whether in the process of wellhead casing repairing or tieback, the shaft is required to be in a well-sealing state and a well control state capable of realizing well killing. Because the well mouth of the accident well is damaged, a well mouth blowout preventer cannot be used, and therefore other modes need to be selected to realize well sealing or killing operation of the shaft.
The existing scheme can adopt simple well sealing cap measures, and the simple well sealing cap generally comprises a simple slip, a sleeve sealing packing and a flange. The structure is simpler, but also has certain operation risk simultaneously, for example the sealed packing of sleeve pipe adopts the form of extrusion seal, when the roughness of sleeve pipe internal surface can not reach the operation requirement, or the sleeve pipe takes place factors such as deformation, all can lead to sealed the inefficacy. There is a risk of failure of the shut-in. In another scheme, a test packer RTTS packer + storm valve structure is adopted, and by adopting the structure, the packer setting needs to adopt a mode of lifting, lowering and pressurizing. However, due to the fact that the packer can be set in the well mouth operation mode, the packer cannot be guaranteed to be set by enough weight of a drill rod, the packer is difficult to guarantee the integrity of the setting, the RTTS packer is not completely set, the sealing effect is poor, the well sealing effect or the well killing effect cannot be guaranteed, and well control risks exist.
In the process of repairing the casing and reconstructing the well mouth of the accident well, if a simple well sealing cap scheme is adopted. There are two problems, one is that since the simple sealing cap uses a sealing form that is a casing packing, the casing packing is typically a standard piece machined to the scale and size of the casing. The dimensions are such that the seal contact stress cannot be adjusted to the specific dimensions of the casing. Therefore, when the roughness of the surface of the casing is high or the size of the casing is deformed, the casing packing has the problems of no sealing or low sealing pressure. And the temporary well sealing cap slips are compressed by flange bolts to realize anchoring, and the slips cannot be well bitten into the casing. There is an unreliable anchoring, and when the pressure in the wellbore is high, there is a risk that the shut-in cap will come out of the wellbore, and there is a greater risk of well control. When the scheme of the RTTS packer and the storm valve is adopted, the setting of the RTTS packer needs to be realized by adopting a lifting and lowering plus pressurizing mode. However, the operation is generally carried out at the wellhead position of the accident well, so that the problems that the packer cannot be completely set due to insufficient drilling pressure of a drill rod, and the sealing between the packer and a casing is unreliable due to the incomplete setting of the packer exist, and the risk of well kick or blowout exists. There is also a greater risk of well control.
The development of offshore oil and gas fields has strict requirements on construction safety and environmental protection. The accident well lacks safety measures such as a wellhead blowout preventer, so that the requirements on the safety measures are stricter in the construction process. And a well sealing cap or RTTS (real time transport System) test packer + storm valve well sealing mode is adopted for well mouth tie-back of the offshore accident well at the present stage. For the reasons of tools and processes, the problems of leakage of the casing seal or insufficient seal anchoring force exist. The existence of these problems also results in a greater risk of well control and environmental contamination in the disposal of offshore wells. Therefore, a new temporary well plugging and killing process and a matched tool string are needed to perfect the offshore accident well casing tie-back operation. Thereby solving the risks of well control safety and environmental pollution of the construction well in the actual construction.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a well repairing device capable of realizing temporary well sealing and well killing; the device can realize fast, high-efficient being connected with between the oil well casing, can realize the recovery to this device by the high quality simultaneously, improves the work efficiency who adopts the operation, guarantees production.
In order to solve the problems of the prior art, the utility model adopts the following technical scheme:
a workover rig capable of realizing temporary well sealing and killing comprises a workover rig body, wherein the workover rig comprises a pipe column for temporary well sealing and killing and workover, and the pipe column is sequentially provided with a hydraulically releasable well killing tieback sealing cylinder, a well killing float shoe, a plug valve, a well killing device seat sealing mechanism, a well killing device and a mechanically releasable well killing tieback device from bottom to top; the tieback sealing cylinder, the plug valve, the well killing float shoe and the well sealer setting mechanism are connected by API casing threads; the blowout preventer and the blowout preventer seat sealing mechanism 5 are connected by adopting left-handed threads; wherein:
when a temporary well sealing and killing well repairing pipe column needs to be sent, the tie-back sealing barrel is connected with the hydraulically releasable killing well tie-back device 1 through a positive-rotation thread; the functions of temporary well sealing, feeding of a kill string, setting, well sealing and killing are completed;
the hydraulically releasable kill-tie-back comprises: the upper joint is connected with the first connecting rod through threads, and the ball seat is arranged in the first connecting rod and fixed through a shearing pin; 6 rib plates are uniformly distributed outside the first connecting rod, 6 clamping grooves are uniformly distributed outside the tieback claw, the width of each clamping groove is larger than that of the rib plate of the first connecting rod, and the rib plates of the first connecting rod can be clamped and embedded in the clamping grooves of the tieback claw during installation; a supporting piston is sleeved between the upper joint and the first connecting rod, an inner hole of the supporting piston is in sealing fit with an outer circle of the first connecting rod, and an outer circle of the supporting piston is in sealing fit with an inner hole of the upper joint; the lower end of the supporting piston is provided with 6 through grooves which can be clamped on a rib plate of the first connecting rod during installation; the support ring is sleeved on the excircle of the lower end of the support piston and is supported at the lower end of the tie-back claw; the baffle ring is connected with the supporting piston through threads; the baffle ring is arranged on the first connecting rod; the first connecting rod is connected with the middle rod through threads; the middle rod is connected with the second connecting rod through threads, and a vulcanization sealing ring is arranged between the middle rod and the second connecting rod; and the second connecting rod is connected with the lower joint through threads, and a vulcanization sealing ring is arranged between the second connecting rod and the lower joint.
Further, when the temporary well sealing and killing operation pipe column needs to be taken out, the supporting piston of the hydraulically releasable well killing tie-back device 1 is knocked off by means of pressing, and lifted, so that the hydraulically releasable well killing tie-back device is separated from the tie-back sealing barrel; feeding a mechanically released kill tieback into a tieback seal cartridge, wherein:
the mechanical release kill-job tieback is composed of an upper joint, an upper connecting rod, a thread anchoring claw, a middle connecting rod, a lower connecting rod, a vulcanization sealing ring, a lower joint and a mandril; the upper joint is in threaded connection with the upper connecting rod, and the threaded anchoring claw is sleeved on the upper connecting rod; the upper connecting rod is in threaded connection with the middle connecting rod, and the middle connecting rod is in threaded connection with the lower connecting rod; the vulcanizing sealing rings are respectively sleeved on the middle connecting rod and the lower connecting rod; the lower joint is in threaded connection with the lower connecting rod, and the ejector rod is in threaded connection with the lower joint.
Furthermore, the kill float shoe consists of a connecting joint, an upper ball seat, a middle joint, a steel ball, a support rod, a support sleeve, a spring, a fixed sleeve, a lower connecting joint and a pressure gauge; the connecting joint is in threaded connection with the middle joint, and the middle joint is in common threaded connection with the lower connecting joint; the upper ball seat is arranged in the connecting joint, and the steel ball is arranged between the upper ball seat and the supporting rod; the spring and the fixed sleeve are respectively sleeved on the support rod 307; the manometer sets up on the fixed cover.
Further, the well sealer setting mechanism consists of an upper joint, a hydraulic cylinder, a piston, a connecting rod, a shearing pin, a setting envelope, a connecting sleeve, an elastic sleeve, a locking block, a spring, a locking claw, a setting steel ball and a setting ball seat; wherein: the upper joint is in threaded connection with the connecting rod, the upper joint is in threaded connection with the hydraulic cylinder, and a piston with a sealing ring is arranged between the hydraulic cylinder and the connecting rod; the connecting sleeve is sleeved on the connecting rod, the seat sealing sleeve is sleeved on the connecting sleeve, the elastic sleeve is sleeved on the connecting rod, and the locking block is provided with the locking block and the spring in the elastic sleeve; the connecting rod is provided with a seat sealing ball seat with a seat sealing steel ball; the connecting rod is connected with a locking claw through threads.
In order to solve the problems of the prior art, the utility model can also adopt the following technical scheme:
when the workover string of the temporary shut-in and kill-in realizes the functions of shut-in and kill-in, the temporary shut-in and kill-in operation string is sent into the casing pipe to be shut-in by the drill rod, and is pressurized by the drill rod, the liquid continues to go down through the steel ball which can hydraulically release the kill-in tieback device, the tieback sealing cylinder and the top open kill-in float shoe, and acts on the seal mechanism of the shut-in device through the plug valve;
the liquid pushes a piston of the blowout preventer setting mechanism, so that the blowout preventer is pushed to realize setting, and a rubber cylinder of the blowout preventer 6 is sealed with the sleeve; the slips of the blowout preventer effect anchoring with the casing, thereby plugging the casing. The pressure in the well can be detected by the pressure gauge 305 on the well killing float shoe 3. When the pressure in the well is high and well kick occurs, the completion fluid with high specific gravity can be injected through the drill rod, so that the well killing operation is realized;
when the temporary well sealing and killing operation tubular column needs to be taken out, after the temporary well sealing and killing operation is finished, a steel ball is thrown into a drill rod and is located on a ball seat of the hydraulically releasable well killing tie-back device, a supporting piston of the hydraulically releasable well killing tie-back device is knocked off by means of knocking, and the supporting piston is lifted up, so that the hydraulically releasable well killing tie-back device is separated from the tie-back sealing cylinder;
connecting a mechanical release kill tie-back device by using a drill rod, sending the mechanical release kill tie-back device into a tie-back sealing cylinder, and anchoring a positive-rotation thread anchoring claw of the mechanical release tie-back device with the tie-back sealing cylinder; through the drill stem forward rotation pipe column, the torque is transmitted to the well plugging device seat sealing mechanism through the mechanical release tie-back well plugging device, the tie-back sealing cylinder, the well plugging float shoe and the plug valve;
under the action of the normal rotation torque, the locking claw of the well sealer setting mechanism is screwed out of the central pipe of the well sealer 6, so that the well sealer setting mechanism is separated from the well sealer. At the moment, the drill rod is lifted upwards, and the blowout preventer seat sealing mechanism drives the blowout preventer to move upwards so as to recover the blowout preventer, thereby realizing the recovery of the temporary blowout preventer and the kill string.
Advantageous effects
The utility model is mainly used for solving the problem that the operations of well sealing and well killing are needed to be temporarily realized when the offshore accident well needs to be reconnected with the casing.
The temporary well plugging and killing operation pipe column can realize reliable sealing with the casing pipe through the well plugging device; can realize higher sealing pressure, prevent because the well control problem that safety measure such as well head preventer appears does not have, guarantee the safety in production.
In the well sealing process, the pressure of the ground pressure can be monitored in real time through the pressure gauge. When well kick and other phenomena occur in the well, well killing operation can be realized by injecting high-density completion fluid through the drill rod, so that well control risks and environmental pollution risks are prevented.
Drawings
FIG. 1 is a schematic diagram of a well workover rig base well structure capable of realizing temporary well shut-in and kill;
FIG. 2 is a schematic diagram of a recovery structure of a well repairing device capable of realizing temporary well shut-in and well killing according to the present invention;
FIG. 3 is a schematic structural diagram of a hydraulically releasable kill-job tieback in a well servicing device capable of achieving temporary shut-in and kill-job of the present invention;
FIG. 4 is a schematic structural diagram of a well killing float shoe in the well repairing device capable of realizing temporary well sealing and killing according to the present invention;
FIG. 5 is a schematic structural diagram of a well sealer setting mechanism in the well repairing device capable of realizing temporary well sealing and killing according to the present invention;
fig. 6 is a schematic structural diagram of a mechanical release kill-job tieback in the well repairing device capable of realizing temporary well shut-in and kill-job.
Detailed Description
The technical scheme of the utility model is further explained by combining the attached figure 1.
As shown in fig. 1, the utility model provides a workover rig capable of realizing temporary well sealing and killing, which comprises a pipe column for temporary well sealing and killing, wherein the pipe column is sequentially provided with a well sealing device 6, a well sealing device seat sealing mechanism 5, a plug valve 4, a well killing float shoe 3, a tie-back sealing barrel 2, a hydraulically releasable well killing tie-back device 1 and a mechanically releasable well killing tie-back device 7 from bottom to top. The hydraulic pressure releasing well killing tie-back device 1 is connected with the tie-back sealing barrel 2 by adopting a positive-rotation thread. The tieback sealing cylinder 2, the plug valve 4, the well killing float shoe 3 and the well sealer setting mechanism 5 are connected through API casing threads. The blowout preventer 6 is connected with the blowout preventer seat sealing mechanism 5 by adopting left-handed threads. When a temporary well sealing and killing well repairing pipe column needs to be sent, a hydraulically releasable killing well tie-back device 1 is connected with a tie-back sealing barrel 2; and the functions of temporary well sealing, feeding of a well killing pipe column, setting, well sealing and well killing are completed. As shown in fig. 2, when the temporary well sealing and killing pipe columns need to be retrieved, the mechanical release killing tie-back 7 is connected with the temporary well sealing and killing pipe columns, the drill pipe is positively rotated to temporarily seal and kill the well and killing pipe columns and lifted up, and the temporary well sealing and killing pipe columns are recovered. Wherein:
as shown in fig. 3, the hydraulically releasable kill-tie-back 1 includes: the upper joint 101 is connected with a first connecting rod 105 through threads, and the ball seat 102 is arranged in the first connecting rod 105 and fixed through a shearing pin 103; 6 rib plates are uniformly distributed outside the first connecting rod 105, 6 clamping grooves are uniformly distributed outside the tieback claw 107, the width of each clamping groove is larger than that of the rib plate of the first connecting rod 105, and the rib plates of the first connecting rod 105 can be clamped and embedded in the clamping grooves of the tieback claw 107 during installation; a supporting piston 104 is sleeved between the upper joint 101 and the first connecting rod 105, the inner hole of the supporting piston 104 is in sealing fit with the outer circle of the first connecting rod 105, and the outer circle of the supporting piston 104 is in sealing fit with the inner hole of the upper joint 101; the lower end of the supporting piston 104 is provided with 6 through grooves which can be clamped on the rib plate of the first connecting rod 105 during installation. The support ring 108 is sleeved on the outer circle of the lower end of the support piston 104 and is supported at the lower end of the tieback claw 107; the baffle ring 109 is connected with the supporting piston 104 through threads, and the baffle ring 109 is sleeved on the first connecting rod 105; the first connecting rod 105 is threadedly coupled to the intermediate rod 110. The middle rod 110 is connected with the second connecting rod 112 through threads, and a vulcanized sealing ring 111 is arranged between the middle rod 110 and the second connecting rod 112; the second connecting rod 112 is in threaded connection with the lower joint 113, and a vulcanized sealing ring 111 is arranged between the second connecting rod 112 and the lower joint 113.
As shown in fig. 4, the kill float shoe 3 is composed of a connection joint 301, an upper ball seat 302, an intermediate joint 303, a steel ball 306, a support rod 307, a support sleeve 308, a spring 309, a fixed sleeve 311, a lower connection joint 304 and a pressure gauge 305. The connecting joint 301 and the middle joint 303 are in common threaded connection, and the middle joint 303 and the lower connecting joint 304 are in common threaded connection. The upper ball seat 302 is fitted into the connector fitting 301 and the steel ball 306 is placed between the upper ball seat 302 and the support bar 307. The spring 309 and the fixing sleeve 311 are respectively sleeved on the support rod 307.
As shown in fig. 5, the setting mechanism 5 of the blowout preventer is composed of an upper joint 501, a hydraulic cylinder 502, a piston 503, a connecting rod 504, a shear pin 505, a setting sleeve 506, a connecting sleeve 507, an elastic sleeve 508, a locking block 509, a spring 510, a locking claw 511, a setting steel ball 512 and a setting ball seat 513. Wherein, the upper joint 501 is connected with the connecting rod 504 by common screw threads, the upper joint 501 is connected with the hydraulic cylinder 502 by common screw threads, and the piston 503 provided with an O-shaped sealing ring is arranged between the hydraulic cylinder 502 and the connecting rod 504. The connecting sleeve 507 is sleeved on the connecting rod 504, the seat sleeve 506 is sleeved on the connecting sleeve 507, the elastic sleeve 508 is sleeved on the connecting rod 504, the locking block 509 is arranged in the elastic sleeve 508, and the spring 510 is arranged in the elastic sleeve 508. The seating ball seat 513 is installed into the connecting rod 504, and the seating ball 512 is seated on the seating ball seat 513. The locking claw 511 is connected with the connecting rod 504 through common threads.
As shown in fig. 6, the mechanical release kill-tie-back 7 is composed of an upper joint 701, an upper connecting rod 702, a threaded anchoring claw 703, a middle connecting rod 704, a lower connecting rod 705, a vulcanized sealing ring 706, a lower joint 707, and a push rod 708. The upper joint 701 is in threaded connection with the upper connecting rod 702, and the threaded anchoring claw 703 is sleeved on the upper connecting rod 702. The upper connecting rod 702 is in common threaded connection with the middle connecting rod 704, and the middle connecting rod 704 is in common threaded connection with the lower connecting rod 705. Vulcanized sealing rings 706 are respectively sleeved on the middle connecting rod 704 and the lower connecting rod 705. The lower joint 707 is in common threaded connection with the lower connecting rod 705, and the top rod 708 is in common threaded connection with the lower joint 707.
The utility model adopts the following production method to carry out the operation of temporarily sealing the well workover string and killing the well:
when the workover string of the temporary well shut-in and kill-in realizes the functions of well shut-in and kill-in, the temporary well shut-in and kill-in operation string is sent into the casing pipe needing well shut-in by the drill rod, and is pressurized by the drill rod, the liquid continues to go down through the hydraulically releasable kill-in tieback 1, the tieback sealing cylinder 2 and the steel ball 306 of the jack-in float 3, and acts on the well shut-in setting mechanism 5 through the plug valve 4; the liquid pushes a piston of the setting mechanism of the blowout preventer, so that the blowout preventer is pushed to realize setting, a rubber sleeve of the blowout preventer and a sleeve realize anchoring of a slip of the sealing blowout preventer and the sleeve, and the sleeve is blocked; at the moment, the pressure in the well can be detected through a pressure gauge 305 on the well killing float shoe 3; when the pressure in the well is higher and well kick occurs, the completion fluid with higher specific gravity can be injected through the drill rod, so that the well killing operation is realized.
When the temporary well sealing and killing operation tubular column needs to be taken out, after the temporary well sealing and killing operation is completed, a steel ball is thrown into the drill rod, the steel ball is located on the ball seat of the hydraulically releasable well killing tie-back device 1, the supporting piston of the hydraulically releasable well killing tie-back device 1 is knocked off by means of knocking-off, and therefore the hydraulically releasable well killing tie-back device 1 is separated from the tie-back sealing barrel 2 in a lifting mode. And connecting the mechanical release kill tie-back 7 by using a drill rod, sending the mechanical release kill tie-back 7 into the tie-back sealing cylinder 2, and anchoring the positive-rotation thread anchoring claw of the mechanical release tie-back 7 and the tie-back sealing cylinder 7. Through the drill rod corotation tubular column, the moment of torsion is transmitted to the blowout preventer seat seal mechanism 5 through the mechanical release tieback blowout preventer 7, the tieback sealing barrel 2, the blowout preventer float 3 and the plug valve 4. Under the action of the normal rotation torque, the locking claw 511 of the blowout preventer seating mechanism 5 is screwed out of the central pipe 603 of the blowout preventer 6, so that the blowout preventer seating mechanism 5 is separated from the blowout preventer 6. At the moment, the drill rod is lifted upwards, the blowout preventer seat sealing mechanism 5 drives the blowout preventer 6 to move upwards, and the blowout preventer 6 is recovered, so that temporary blowout preventers and kill strings are recovered.
The specific implementation mode of the utility model is as follows:
1) setting a temporary well plugging and killing workover string: the connecting sequence of the pipe column is from bottom to top, and the pipe column sequentially comprises a well sealer, a well sealer setting tool, a plug valve, a well killing float shoe, a tie-back sealing barrel and a hydraulic pressure releasing well killing tie-back device.
2) The temporary well plugging and killing operation pipe column is conveyed into the casing by a drill rod, the pipe is pressed, and the liquid with pressure reaches the well plugging device setting tool through a hydraulic pressure releasing well killing tieback device, a well killing float shoe and a plug valve. The well sealer setting tool piston pushes the well sealer to act, so that expansion sealing of a well sealer rubber cylinder and anchoring of slips are achieved, and sealing and anchoring of the well sealer and the casing are achieved. The pressure in the well can be observed through the pressure gauge on the well killing float shoe, and the operation measures to be taken next step are judged at any time according to the pressure condition in the well. When the pressure in the well is found to be higher, higher sealing completion fluid can be injected together with the through-drilling rod to realize well killing, so that the risk of well control is avoided.
3) When the well head casing pipe treatment of the accident well is finished, before the casing pipe is connected back, a ball is thrown, the steel ball is located on a ball seat of the hydraulically releasable kill-job tieback, the hydraulically releasable kill-job tieback is released through pressurizing, and the hydraulically releasable kill-job tieback is lifted up to be taken out.
4) And (4) connecting the casing back, wherein after the casing back is connected, the casing back can be directly pressed at a wellhead, and whether the casing tieback device is sealed or not is verified.
5) After the seal checking of the casing tie-back device is completed, the mechanical release kill-job tie-back device is sent into the tie-back sealing cylinder by the drill rod, and the mechanical release tie-back device is sent into the tie-back sealing cylinder by pressing down. The drill rod is positively rotated at the moment, the drill rod transmits the torque to the locking claw of the well sealer setting tool, and the locking claw is in left-handed threaded connection with the well sealer central tube, so that the locking claw of the well sealer setting tool withdraws from the well sealer central tube at the moment. The well sealer can be released from the well sealer setting tool, and the drill rod is lifted up at the moment, so that the well sealer can be released. And taking out the temporary well sealing and killing operation pipe column.
It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (3)
1. The utility model provides a can realize interim workover rig of shut-in, kill-job, comprises workover rig body, its characterized in that: the well repairing device comprises a temporary well sealing device and a tubular column for well killing and well repairing, wherein the tubular column is sequentially provided with a hydraulically releasable well killing tieback sealing cylinder, a well killing floating shoe, a plug valve, a well killing device seat sealing mechanism, a well killing device and a mechanically releasable well killing tieback device from bottom to top; the tieback sealing cylinder, the plug valve, the well killing float shoe and the well sealer setting mechanism are connected by API casing threads; the blowout preventer and the blowout preventer seat sealing mechanism are connected by adopting left-handed threads; wherein:
when a temporary well sealing and killing well repairing pipe column needs to be sent, the tie-back sealing barrel is connected with the hydraulically releasable killing well tie-back device 1 through a positive-rotation thread; the functions of temporary well sealing, feeding of a kill string, setting, well sealing and killing are completed;
the hydraulically releasable kill-tie-back comprises: the upper joint is connected with the first connecting rod through threads, and the ball seat is arranged in the first connecting rod and fixed through a shearing pin; 6 rib plates are uniformly distributed outside the first connecting rod, 6 clamping grooves are uniformly distributed outside the tieback claw, the width of each clamping groove is larger than that of the rib plate of the first connecting rod, and the rib plates of the first connecting rod can be clamped and embedded in the clamping grooves of the tieback claw during installation; a supporting piston is sleeved between the upper joint and the first connecting rod, an inner hole of the supporting piston is in sealing fit with an outer circle of the first connecting rod, and an outer circle of the supporting piston is in sealing fit with an inner hole of the upper joint; the lower end of the supporting piston is provided with 6 through grooves which can be clamped on a rib plate of the first connecting rod during installation; the support ring is sleeved on the excircle of the lower end of the support piston and is supported at the lower end of the tie-back claw; the baffle ring is connected with the supporting piston through threads; the baffle ring is arranged on the first connecting rod; the first connecting rod is connected with the middle rod through threads; the middle rod is connected with the second connecting rod through threads, and a vulcanized sealing ring is arranged between the middle rod and the second connecting rod; the second connecting rod is connected with the lower joint through threads, and a vulcanization sealing ring is arranged between the second connecting rod and the lower joint;
when the temporary well sealing and killing operation pipe column needs to be taken out, the supporting piston of the hydraulically releasable well killing tie-back device is knocked off by means of knocking and lifted, so that the hydraulically releasable well killing tie-back device is separated from the tie-back sealing barrel; feeding a mechanically released kill tieback into a tieback seal cartridge, wherein:
the mechanical release kill-job tieback is composed of an upper joint, an upper connecting rod, a thread anchoring claw, a middle connecting rod, a lower connecting rod, a vulcanization sealing ring, a lower joint and a mandril; the upper joint is in threaded connection with the upper connecting rod, and the threaded anchoring claw is sleeved on the upper connecting rod; the upper connecting rod is in threaded connection with the middle connecting rod, and the middle connecting rod is in threaded connection with the lower connecting rod; the vulcanizing sealing rings are respectively sleeved on the middle connecting rod and the lower connecting rod; the lower joint is in threaded connection with the lower connecting rod, and the ejector rod is in threaded connection with the lower joint.
2. The well repairing device capable of realizing temporary well sealing and killing according to claim 1, wherein: the kill float shoe consists of a connecting joint, an upper ball seat, a middle joint, a steel ball, a support rod, a support sleeve, a spring, a fixed sleeve, a lower connecting joint and a pressure gauge; the connecting joint is in threaded connection with the middle joint, and the middle joint is in common threaded connection with the lower connecting joint; the upper ball seat is arranged in the connecting joint, and the steel ball is arranged between the upper ball seat and the supporting rod; the spring and the fixed sleeve are respectively sleeved on the support rod; the manometer sets up on the fixed cover.
3. The well repairing device capable of realizing temporary well sealing and killing according to claim 1, wherein: the well sealer seat sealing mechanism consists of an upper joint, a hydraulic cylinder, a piston, a connecting rod, a shearing pin, a seat sealing sleeve, a connecting sleeve, an elastic sleeve, a locking block, a spring, a locking claw, a seat sealing steel ball and a seat sealing ball seat; wherein: the upper joint is in threaded connection with the connecting rod, the upper joint is in threaded connection with the hydraulic cylinder, and a piston with a sealing ring is arranged between the hydraulic cylinder and the connecting rod; the connecting sleeve is sleeved on the connecting rod, the seat sealing sleeve is sleeved on the connecting sleeve, the elastic sleeve is sleeved on the connecting rod, and the locking block is provided with the locking block and the spring in the elastic sleeve; the connecting rod is provided with a seat sealing ball seat with a seat sealing steel ball; the connecting rod is connected with a locking claw through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122578204.1U CN216517889U (en) | 2021-10-26 | 2021-10-26 | Can realize workover rig of interim well shutoff, kill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122578204.1U CN216517889U (en) | 2021-10-26 | 2021-10-26 | Can realize workover rig of interim well shutoff, kill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216517889U true CN216517889U (en) | 2022-05-13 |
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ID=81525088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122578204.1U Active CN216517889U (en) | 2021-10-26 | 2021-10-26 | Can realize workover rig of interim well shutoff, kill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216517889U (en) |
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2021
- 2021-10-26 CN CN202122578204.1U patent/CN216517889U/en active Active
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