A large-pilot-set hanging device and method of use

Abstract

The application discloses a large-diameter setting and hanging device, which comprises a setting and hanging assembly and a service tool assembly, wherein the setting and hanging assembly comprises a top pack-off short section, a double female coupling and a tail pipe hanging short section which are sequentially connected from top to bottom; the service tool assembly comprises a setting short section, a first joint, a releasing short section, a second joint and an anchoring setting and hanging short section which are sequentially connected from top to bottom; the setting short section is used for controlling the setting of the top pack-off short section; the releasing short section is connected with the top pack-off short section and can be released under the external pressure; and the anchoring setting and hanging short section can control the setting and hanging of the tail pipe hanging short section under the external pressure. The application can guarantee the drift diameter of the setting and hanging device, meet the requirements of the large-diameter use environment, provide convenience for subsequent operations and increase the application range of the tool.

Description

Technical Field

[0001] This invention belongs to the field of well completion operation technology, specifically relating to a large-diameter setting and suspension device and its usage method. Background Technology

[0002] Currently, most existing hydraulic setting hangers integrate the hydraulic system into the hanger body. Due to the limited space within the hanger body itself, coupled with the integration of multiple complex mechanisms such as hydraulic setting, release, and locking, the main structure is bulky and contains numerous parts. This complex structural design not only increases the probability of tool failure during use but also severely restricts the hanger's bore diameter.

[0003] With the continuous development of well completion technology, new technologies such as expandable screen completion and expandable tubing completion require the insertion of large-diameter expansion cones for diameter enlargement operations in the later stages of well completion. However, conventional hangers, due to their small diameter, cannot meet the passage requirements of large-diameter expansion tool strings. This deficiency makes conventional hangers unsuitable for the aforementioned well completion operations, and the small diameter brings significant risks and hidden dangers to later operations, requiring improvement. Summary of the Invention

[0004] In order to solve all or some of the above problems, the purpose of this invention is to provide a large-diameter setting and suspension device and its usage method, which meets the requirements of the large-diameter usage environment, provides convenience for subsequent operations, and increases the applicability of the tool.

[0005] In a first aspect, the present invention provides a large-diameter setting and suspension device, including a setting and suspension assembly and a service tool assembly. The setting and suspension assembly includes a top sealing short section, a double female coupling and a tailpipe suspension short section connected in sequence from top to bottom. The service tool assembly includes a setting short section, a first joint, a release short section, a second joint and an anchoring setting and suspension short section connected in sequence from top to bottom. The setting section is used to control the setting of the top sealing section. The release section is connected to the top sealing section and can release under external pressure. The anchoring section can control the setting of the tailpipe suspension section under external pressure.

[0006] Optionally, the tailpipe suspension sub includes: The upper central tube is connected at the top to the double-female coupling. A double connector is attached to the bottom of the upper central tube; The lower central tube is connected to the bottom of the double connector; The upper hydraulic cylinder is connected to the upper central tube via a first shear pin, and an upper pressure ring cavity is provided between the upper hydraulic cylinder and the upper central tube; An upper pressure hole is provided on the upper central tube and communicates with the upper pressure ring cavity; Multiple upper support plates are connected to the bottom of the upper hydraulic cylinder. The upper seat is equipped with multiple hanging clips, each connected to the bottom of the corresponding upper support plate; The upper seat cone is fixed on the upper central tube and located below the upper seat slip, and the upper seat slip can expand outward under the guidance of the upper seat cone and sit with the sleeve. The lower hydraulic cylinder is connected to the lower central tube via a second shear pin, and a lower pressure ring cavity is provided between the lower hydraulic cylinder and the lower central tube; A lower pressure hole is provided on the lower central tube and communicates with the lower pressure ring cavity; Multiple lower support plates are connected to the top of the lower hydraulic cylinder. The lower seat is equipped with multiple hanging clips, each connected to the top of the corresponding lower support plate; The lower seat cone is fixed on the lower central tube and located above the lower seat slip, and the lower seat slip can expand outward under the guidance of the lower seat cone and sit on the sleeve. The anchoring and mounting short section enables the first shear pin and the second shear pin to be sheared under external pressure, so that the upper hydraulic cylinder and the lower hydraulic cylinder move toward the double joint respectively, thereby enabling the upper mounting slip and the lower mounting slip to be mounted on the sleeve respectively.

[0007] Optionally, the anchoring sling includes: An anchoring pipe, the top of which is connected to the second joint; A sealing ball seat is connected to the bottom of the anchoring tube and is sealed to the lower central tube. A seated ball is used to be inserted from the wellhead and to seal with the sealing ball seat. An anchoring and sealing assembly, which is sealed between the anchoring pipe and the upper central pipe; The pressure channel is located at the upper end of the sealing ball seat.

[0008] Optionally, the anchoring seal assembly includes: An anchoring sleeve is slidably and sealingly connected between the anchoring tube and the upper central tube; There are multiple guide holes, each of which is provided on the anchoring sleeve; Anchoring blocks, in multiple quantities, are slidably connected to the corresponding guide holes; An anchoring ring groove is provided on the upper central tube, and the ends of the plurality of anchoring blocks that are far apart from each other are respectively inserted into the anchoring ring groove; There are multiple guide pins, each connected to the anchoring sleeve; Multiple sliding holes are provided on the corresponding anchoring blocks. The sliding holes are elongated and the guide pins pass through the sliding holes so that the anchoring blocks can move radially along the anchoring sleeve. Unlocking groove, located at the lower end of the anchoring pipe; As the anchoring tube moves upward and aligns the unlocking ring groove with the plurality of anchoring blocks, and as the anchoring tube continues to be lifted, the plurality of anchoring blocks can disengage from the anchoring ring groove and respectively engage with the unlocking ring groove.

[0009] Optionally, the top sealing section includes: The mandrel tube is connected at the bottom to the double-female coupling. The outer cylinder is locked and connected to the mandrel tube by a third shear pin; A return sleeve is connected to the top of the locking outer sleeve; The first ratchet locking ring is disposed on the mandrel tube and is in one-way sliding engagement with the locking outer cylinder, so that the locking outer cylinder can only move downward; A setting cone sleeve is disposed at the bottom of the locking outer cylinder; A support sleeve is disposed on the mandrel tube and located below the setting cone sleeve; A sealing rubber tube is disposed on the support sleeve; The support sleeve can expand under the action of the setting cone sleeve to set the setting rubber sleeve with the sleeve.

[0010] Optionally, the setting section includes: The bottom of the sealing cylinder is connected to the first connector. An upper limit ring is provided on the setting cylinder; A lower limit ring is disposed on the setting cylinder, and an installation ring groove is formed between the upper limit ring, the lower limit ring and the setting cylinder; Multiple sealing blocks are provided, each movably disposed within the mounting ring groove. Multiple push springs are provided and are respectively disposed in the mounting ring groove. Each push spring is used to push the corresponding setting block to move so that the setting block extends out of the mounting ring groove and can press against the top of the return cylinder.

[0011] Optionally, the drop section includes: The drop-off connector is connected at the top to the first connector; The drop tube is connected at the top to the drop connector and at the bottom to the second connector. The drop piston is connected to the drop tube via a fourth shear pin, and a drop ring cavity is provided between the drop piston and the drop tube; A release pressure hole is provided on the release tube and communicates with the release ring cavity; Multiple limiting claws are provided, each disposed on the release piston. Multiple limit blocks are provided, each located at the bottom of a corresponding limit claw. A limiting slot is provided on the top sealing section, and multiple limiting blocks are respectively inserted into the limiting slot; The second connector abuts against multiple limiting blocks to prevent the bottoms of the multiple limiting claws from moving toward the release tube.

[0012] Optionally, the drop section further includes: The second ratchet locking ring is disposed on the release tube and slides in one direction with the release piston, so that the release piston can only slide upward.

[0013] Optionally, the drop section further includes: The anti-rotation cylinder is connected to the drop-out connector via a fifth shear pin. A support ring is vertically and slidably disposed between the anti-rotation cylinder and the hand-dropping tube; A return spring is used to push the support ring downward. A clearance hole is provided on the anti-rotation cylinder; An anti-rotation block passes through the clearance hole and is connected to the support ring, and the anti-rotation block can move vertically along the clearance hole; An anti-rotation slot is provided on the top sealing section, and the anti-rotation block is engaged in the anti-rotation slot to restrict the anti-rotation cylinder from rotating relative to the top sealing section; When the seated short section is rotated and the fifth shear pin is cut, the release joint can move downward relative to the anti-rotation cylinder, so that the second joint separates from the plurality of the limiting blocks respectively.

[0014] Secondly, the present invention provides a method for using a large-diameter setting and suspension device, comprising the following steps: S1, throw the ball to press down, so that the tailpipe suspension short section sits; S2, continue to suppress, so that the short section can be released; S3, lifting and lowering service tool assembly, using the setting short section to control the setting of the top sealing short section; S4, continue lifting the service tool assembly until it is removed from the wellhead.

[0015] As can be seen from the above technical solution, the large-diameter setting seal suspension device and its usage method provided by the present invention have the following advantages: This large-diameter setting and suspension device ensures the bore diameter of the setting and suspension device, meets the requirements of large-diameter operating environments, facilitates subsequent operations, and increases the applicability of the tool.

[0016] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the tailpipe suspension section in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the anchorage mounting section in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the top sealing section in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the seated short section in an embodiment of the present invention; Figure 6 This is a cross-sectional view of the mate between the drop-out section and the top sealing section in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the drop-out section in an embodiment of the present invention; Figure 8 This is a cross-sectional view of the drop-hand short section in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Setting and suspension assembly; 200. Service tool assembly; 1. Top sealing section; 101. Mandrel tube; 102. Third shear pin; 103. Locking outer sleeve; 104. Return sleeve; 105. First ratchet locking ring; 106. Setting cone sleeve; 107. Support sleeve; 108. Setting rubber sleeve; 2. Double female coupling; 3. Tailpipe suspension section; 301. Upper center tube; 302. Double connector; 303. Lower center tube; 304. First shear pin 305. Pin; Upper hydraulic cylinder; 306. Upper pressure ring cavity; 307. Upper pressure hole; 308. Upper support plate; 309. Upper seated slip; 310. Upper seated cone cylinder; 311. Second shear pin; 312. Lower hydraulic cylinder; 313. Lower pressure ring cavity; 314. Lower pressure hole; 315. Lower support plate; 316. Lower seated slip; 317. Lower seated cone cylinder; 4. Sealing short section; 401. Sealing cylinder; 402. Upper limit ring; 40 3. Lower limit ring; 404. Mounting ring groove; 405. Sealing block; 406. Push spring; 5. First connector; 6. Release section; 601. Release connector; 602. Release tube; 603. Fourth shear pin; 604. Release piston; 605. Release ring cavity; 606. Release pressure hole; 607. Limiting claw; 608. Limiting block; 609. Limiting groove; 610. Second ratchet locking ring; 611. Anti-rotation cylinder; 612. Fifth shear pin; 613, support ring; 614, return spring; 615, clearance hole; 616, anti-rotation block; 7, second connector; 8, anchoring seat section; 801, anchoring tube; 802, sealing ball seat; 803, seat ball; 804, anchoring sealing assembly; 805, anchoring lock sleeve; 806, guide hole; 807, anchoring lock block; 808, anchoring ring groove; 809, guide pin; 810, sliding hole; 811, unlocking ring groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be arbitrarily combined with each other.

[0021] like Figures 1-8 The illustration shows an embodiment of the present invention, which discloses a large-diameter setting and suspension device, including a setting and suspension assembly 100 and a service tool assembly 200. The setting and suspension assembly 100 includes a top sealing section 1, a double female coupling 2, and a tailpipe suspension section 3 connected sequentially from top to bottom. The service tool assembly 200 includes a setting section 4, a first joint 5, a release section 6, a second joint 7, and an anchoring and setting section 8 connected sequentially from top to bottom by threads.

[0022] In one embodiment, such as Figure 1As shown, the setting sub 4 is used to control the setting of the top sealing sub 1, and the anchoring and mounting sub 8 can control the setting of the tailpipe suspension sub 3 under external pressure. The release sub 6 is connected to the top sealing sub 1, meaning that the release sub 6 can send the setting suspension assembly 100 into the sleeve, and at the same time, the release sub 6 can release under external pressure.

[0023] In one embodiment, such as Figure 1 , Figure 2 As shown, the tailpipe suspension section 3 includes an upper central tube 301, a double connector 302, and a lower central tube 303 connected sequentially from top to bottom, with the top of the upper central tube 301 connected to the double female coupling 2. An upper hydraulic cylinder 305 is connected to the upper central tube 301 via a first shear pin 304. An upper pressure ring cavity 306 is provided between the upper hydraulic cylinder 305 and the upper central tube 301, and an upper pressure hole 307 is provided on the upper central tube 301 that communicates with the upper pressure ring cavity 306, meaning that the first shear pin 304 can be sheared under external pressure.

[0024] In one embodiment, such as Figure 1 , Figure 2 As shown, multiple elastic upper support plates 308 are fixedly connected to the bottom of the upper hydraulic cylinder 305. The multiple upper support plates 308 are arranged at equal intervals along the circumference of the upper hydraulic cylinder 305, and each upper support plate 308 is fixedly connected to an upper seat slip 309 at its bottom. At the same time, an upper seat cone 310 is fixedly connected to the upper central tube 301. The upper seat cone 310 is located below the upper seat slip 309. When the upper seat slip 309 moves downward, the upper seat slip 309 and the upper support plates 308 can be spread open under the guidance of the upper seat cone 310, so that the upper seat slip 309 sits on the sleeve.

[0025] In one embodiment, such as Figure 1 , Figure 2 As shown, a lower hydraulic cylinder 312 is connected to the lower central tube 303 via a second shear pin 311. A lower pressure ring cavity 313 is provided between the lower hydraulic cylinder 312 and the lower central tube 303, and a lower pressure hole 314 communicating with the lower pressure ring cavity 313 is provided on the lower central tube 303. That is, the second shear pin 311 can be sheared under external pressure, and the force required for the first shear pin 304 and the second shear pin 311 to shear is equal.

[0026] In one embodiment, such as Figure 1 , Figure 2As shown, multiple elastic lower support plates 315 are fixedly connected to the top of the lower hydraulic cylinder 312. The multiple lower support plates 315 are arranged at equal intervals along the circumference of the lower hydraulic cylinder 312, and a lower seat slip 316 is fixedly connected to the top of each lower support plate 315. At the same time, a lower seat cone 317 is fixedly connected to the lower central tube 303. The lower seat cone 317 is located above the lower seat slip 316. When the lower seat slip 316 moves upward, the lower seat slip 316 and the lower support plates 315 can be opened under the guidance of the lower seat cone 317 so that the lower seat slip 316 sits on the sleeve.

[0027] In one embodiment, such as Figure 1 , Figure 2 As shown, the anchoring mounting section 8 can cause the first shear pin 304 and the second shear pin 311 to shear under external pressure, so that the upper hydraulic cylinder 305 and the lower hydraulic cylinder 312 move toward the double joint 302 respectively, thereby enabling the upper mounting slip 309 and the lower mounting slip 316 to be mounted synchronously, ensuring the stability of the mounting.

[0028] In one embodiment, such as Figure 1 , Figure 3 As shown, the anchoring and mounting section 8 includes an anchoring pipe 801, a sealing ball seat 802, a mounting ball 803, and an anchoring and sealing assembly 804. The top of the anchoring pipe 801 is connected to the second connector 7, and the sealing ball seat 802 is connected to the bottom of the anchoring pipe 801, and the sealing ball seat 802 is in a sealing fit with the lower central pipe 303. The mounting ball 803 is used for insertion from the wellhead and is in a sealing fit with the sealing ball seat 802. The anchoring and sealing assembly 804 is sealingly connected between the anchoring pipe 801 and the upper central pipe 301, and a pressure channel is provided at the upper end of the sealing ball seat 802.

[0029] After the set-on ball 803 is inserted into the wellhead and forms a sealed fit with the sealing ball seat 802, pressure is applied using external pressure testing equipment. At this time, drilling fluid enters the annular cavity between the sealing ball seat 802 and the anchoring sealing assembly 804 through the pressure testing channel, and then enters the upper pressure testing annular cavity 306 and the lower pressure testing annular cavity 313 through the upper pressure testing hole 307 and the lower pressure testing hole 314. Subsequently, the first shear pin 304 and the second shear pin 311 are sheared off respectively, and the upper hydraulic cylinder 305 and the lower hydraulic cylinder 312 move toward the double joint 302 respectively, so that the upper set-on slip 309 and the lower set-on slip 316 are respectively set on the casing.

[0030] In one embodiment, such as Figure 2 , Figure 3As shown, the anchoring sealing assembly 804 includes an anchoring locking sleeve 805 disposed between the anchoring tube 801 and the upper central tube 301, and the anchoring locking sleeve 805 is in a sealing sliding fit with the anchoring tube 801 and the upper central tube 301 respectively. The anchoring locking sleeve 805 is provided with multiple guide holes 806, and an anchoring locking block 807 is slidably connected in each guide hole 806. The inner wall of the upper central tube 301 is provided with an anchoring ring groove 808, and the ends of the multiple anchoring locking blocks 807 that are far apart from each other are respectively engaged in the anchoring ring groove 808.

[0031] In one embodiment, such as Figure 2 , Figure 3 As shown, the anchoring sleeve 805 is provided with a plurality of guide pins 809, and each anchoring block 807 is provided with a long strip-shaped sliding hole 810. The plurality of guide pins 809 pass through the corresponding sliding holes 810 respectively, so that the plurality of anchoring blocks 807 can move radially along the anchoring sleeve 805.

[0032] In one embodiment, such as Figure 2 , Figure 3 As shown, the lower end of the anchoring pipe 801 is provided with an unlocking ring groove 811. The inner wall of the top side of the anchoring ring groove 808 has a guide slope. When the anchoring pipe 801 moves upward and the unlocking ring groove 811 is aligned with multiple anchoring locking blocks 807, and the anchoring pipe 801 continues to be lifted, the multiple anchoring locking blocks 807 can be dislodged from the anchoring ring groove 808 and respectively locked into the unlocking ring groove 811, so that the anchoring sealing assembly 804 can be pulled out from the wellhead along with the anchoring pipe 801.

[0033] In one embodiment, such as Figure 1 , Figure 4 As shown, the top sealing section 1 includes a mandrel tube 101. The bottom of the mandrel tube 101 is connected to the double female coupling 2. A locking outer cylinder 103 is connected to the mandrel tube 101 via a third shear pin 102. A return cylinder 104 is connected to the top of the locking outer cylinder 103. Simultaneously, a first ratchet locking ring 105 is fixedly connected to the mandrel tube 101. The first ratchet locking ring 105 and the locking outer cylinder 103 slide in one direction, so that the locking outer cylinder 103 can only move downwards.

[0034] In one embodiment, such as Figure 1 , Figure 4 As shown, a setting cone sleeve 106 is fixedly connected to the bottom of the locking outer cylinder 103. A support sleeve 107 is provided on the mandrel tube 101, located below the setting cone sleeve 106, and a setting rubber sleeve 108 is provided on the support sleeve 107. When the setting cone sleeve 106 moves downward, the support sleeve 107 can expand under the guiding action of the setting cone sleeve 106, so that the setting rubber sleeve 108 sets with the sleeve.

[0035] In one embodiment, such as Figure 4 , Figure 5 As shown, the setting section 4 includes a setting cylinder 401, and the bottom of the setting cylinder 401 is connected to the first connector 5. An upper limit ring 402 and a lower limit ring 403 are provided on the setting cylinder 401, forming an installation ring groove 404 between the upper limit ring 402, the lower limit ring 403, and the setting cylinder 401. Multiple setting blocks 405 are movably disposed within the installation ring groove 404, and multiple push springs 406 are disposed within the installation ring groove 404. Each push spring 406 is connected to a corresponding setting block 405, and each push spring 406 is used to push the corresponding setting block 405 to move, so that the middle protrusion of the setting block 405 can extend out of the installation ring groove 404, thereby allowing the middle protrusion of the setting block 405 to press against the top of the return cylinder 104.

[0036] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 As shown, the release section 6 includes a release connector 601, the top of which is connected to the first connector 5, and the bottom of which is connected to a release tube 602, which is connected to the second connector 7. A release piston 604 is connected to the release tube 602 via a fourth shear pin 603. A release ring cavity 605 is provided between the release piston 604 and the release tube 602, and a release pressure hole 606 communicating with the release ring cavity 605 is provided on the release tube 602, meaning the fourth shear pin 603 can be shortened under external pressure. In this embodiment, the force required for the fourth shear pin 603 to cut is much greater than the force required for the first shear pin 304 and the second shear pin 311 to cut, ensuring that the seated suspension device sits and then releases.

[0037] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 As shown, the release piston 604 is provided with multiple limiting claws 607, which are evenly spaced along the circumference of the release piston 604, and each release piston 604 has a limiting block 608 at its bottom. The spindle tube 101 is provided with a limiting groove 609, and the multiple limiting blocks 608 are respectively engaged in the limiting groove 609. At the same time, the second connector 7 abuts against the multiple limiting blocks 608 to prevent the bottoms of the multiple limiting claws 607 from moving toward the release tube 602.

[0038] In one embodiment, such as Figure 6 , Figure 7 , Figure 8As shown, the release section 6 also includes a second ratchet locking ring 610 fixed on the release tube 602. The second ratchet locking ring 610 is in one-way sliding engagement with the release piston 604 so that the release piston 604 can only slide upwards to prevent the limiting pawl 607 from moving downwards.

[0039] When pressure is applied by an external pressure testing device, the fourth shear pin 603 is sheared. At this time, the release piston 604 drives the limit pawl 607 and other components to move upward. The limit pawl 607 undergoes elastic deformation, so that the limit block 608 is disengaged from the limit groove 609, thereby releasing the hand.

[0040] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 As shown, the release section 6 also includes an anti-rotation cylinder 611, which is connected to the release connector 601 via a fifth shear pin 612. A support ring 613 slides vertically between the anti-rotation cylinder 611 and the release tube 602, and a return spring 614 is provided between the anti-rotation cylinder 611 and the release tube 602, which is used to push the support ring 613 downward. A clearance hole 615 is provided on the anti-rotation cylinder 611, and an anti-rotation block 616 is slidably connected in the clearance hole 615. The anti-rotation block 616 is connected to the support ring 613 and can move vertically along the clearance hole 615.

[0041] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 As shown, the mandrel tube 101 is provided with an anti-rotation groove, and the anti-rotation block 616 is inserted into the anti-rotation groove to restrict the anti-rotation cylinder 611 from rotating relative to the mandrel tube 101. At the same time, the end of the release connector 601 that is close to the anti-rotation cylinder 611 has a stepped structure. When the seated short section 4 is rotated and the fifth shearing pin 612 is cut, the release connector 601 can move downward relative to the anti-rotation cylinder 611, so that the second connector 7 separates from the multiple limiting blocks 608 respectively, thereby reserving space for the deformation of the limiting claw 607 to realize emergency mechanical release.

[0042] This embodiment also discloses a method for using the large-diameter setting and suspension device, including the following steps: S1, throw the ball to press down, so that the tailpipe suspension short section 3 is seated; S2, continue to suppress, so that the short section 6 can be released; S3, lifting and lowering service tool assembly 200, using the setting stub 4 to control the setting of the top sealing stub 1; S4, continue to lift the service tool assembly 200 until it is pulled out of the wellhead.

[0043] Specifically: The set ball 803 is inserted from the wellhead to seal the set ball 803 with the sealing ball seat 802. Then, pressure is applied by external pressure equipment until the first shear pin 304 and the second shear pin 311 are sheared. At this time, the upper hydraulic cylinder 305 and the lower hydraulic cylinder 312 move toward each other so that the upper set slip 309 and the lower set slip 316 are opened and set with the casing respectively.

[0044] Subsequently, pressure continues until the fourth shear pin 603 is cut short. At this point, the release piston 604 drives the limit pawl 607 and the limit block 608 to move upward, causing the limit block 608 to disengage from the limit groove 609, thus releasing the hand. Of course, if hydraulic control fails to release the hand, the service tool assembly 200 can be rotated to cut the fifth shear pin 612. When the service tool assembly 200 is lowered and rotated, the release connector 601 moves downward relative to the anti-rotation cylinder 611, causing the second connector 7 to separate from the multiple limit blocks 608 respectively. At this time, lifting the service tool assembly 200 will allow the limit blocks 608 to disengage from the limit groove 609.

[0045] Next, the service tool assembly 200 is lifted until the setting block 405 disengages from the return cylinder 104. Then, the service tool assembly 200 is lowered so that the setting block 405 presses against the top of the return cylinder 104. The third shear pin 102 shears under the weight of the service tool assembly 200, causing the locking cylinder and other components to move downwards. This causes the support sleeve 107 to expand under the guidance of the setting cone sleeve 106, allowing the setting rubber sleeve 108 to set with the sleeve. Under the limiting action of the first ratchet locking ring 105, the locking cylinder and other components cannot move upwards, ensuring the stability of the setting.

[0046] As can be seen from the above process, the service tool assembly 200 of the setting and suspension device has a built-in hydraulic control function, which will not affect the diameter of the tailpipe suspension device, meets the requirements of the large-diameter use environment, and the tailpipe suspension device used with it has an additional retrieval function, which provides convenience for subsequent operations and increases the applicability of the tool.

[0047] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should have the ordinary meaning as understood by one of ordinary skill in the art.

[0048] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A large-diameter setting and suspension device, characterized in that, The assembly includes a seated suspension assembly (100) and a service tool assembly (200). The seated suspension assembly (100) includes a top sealing section (1), a double female coupling (2), and a tailpipe suspension section (3) connected from top to bottom. The service tool assembly (200) includes a seated section (4), a first joint (5), a release section (6), a second joint (7), and an anchored seated section (8) connected from top to bottom. The setting section (4) is used to control the setting of the top sealing section (1). The release section (6) is connected to the top sealing section (1) and can release under external pressure. The anchoring section (8) can control the setting of the tailpipe suspension section (3) under external pressure.

2. The large-diameter seat suspension device according to claim 1, characterized in that, The tailpipe suspension sub (3) includes: The upper central tube (301) is connected at the top to the double female coupling (2); A double connector (302) is connected to the bottom of the upper central tube (301); The lower central tube (303) is connected to the bottom of the double connector (302); The upper hydraulic cylinder (305) is connected to the upper central tube (301) via the first shear pin (304), and an upper pressure ring cavity (306) is provided between the upper hydraulic cylinder (305) and the upper central tube (301); An upper pressure hole (307) is provided on the upper central tube (301) and communicates with the upper pressure ring cavity (306); Multiple upper support plates (308) are connected to the bottom of the upper hydraulic cylinder (305); The upper seat is a hanging bracket (309), which is multiple in number and is respectively connected to the bottom of the corresponding upper support plate (308); The upper seated cone (310) is fixed on the upper central tube (301) and located below the upper seated slip (309). The upper seated slip (309) can expand outward under the guidance of the upper seated cone (310) and be seated with the sleeve. The lower hydraulic cylinder (312) is connected to the lower central tube (303) via the second shear pin (311), and a lower pressure ring cavity (313) is provided between the lower hydraulic cylinder (312) and the lower central tube (303); The lower pressure hole (314) is provided on the lower central tube (303) and communicates with the lower pressure ring cavity (313); Multiple lower support plates (315) are connected to the top of the lower hydraulic cylinder (312); The lower seat brackets (316) are multiple in number and are respectively connected to the top of the corresponding lower support plate (315); The lower seat cone (317) is fixed on the lower central tube (303) and located above the lower seat slip (316). The lower seat slip (316) can expand outward under the guidance of the lower seat cone (317) and sit on the sleeve. The anchoring short section (8) enables the first shear pin (304) and the second shear pin (311) to be sheared under external pressure, so that the upper hydraulic cylinder (305) and the lower hydraulic cylinder (312) move toward the double joint (302) respectively, thereby enabling the upper mounting slip (309) and the lower mounting slip (316) to be mounted on the sleeve respectively.

3. The large-diameter seat suspension device according to claim 2, characterized in that, The anchoring and mounting section (8) includes: Anchor pipe (801), the top of which is connected to the second connector (7); A sealing ball seat (802) is connected to the bottom of the anchor tube (801) and is sealed to the lower center tube (303); A seat ball (803) is used to be inserted from the wellhead and to be sealed in conjunction with the sealing ball seat (802); An anchoring sealing assembly (804) is sealed between the anchoring tube (801) and the upper central tube (301); The pressure channel is located at the upper end of the sealing ball seat (802).

4. The large-diameter seat suspension device according to claim 3, characterized in that, The anchoring seal assembly (804) includes: Anchoring sleeve (805) is slidably connected between the anchoring tube (801) and the upper central tube (301); Guide holes (806) are provided in multiple quantities and are respectively provided on the anchoring sleeve (805); Anchoring blocks (807) are multiple in number and are slidably connected in the corresponding guide holes (806); An anchoring ring groove (808) is provided on the upper central tube (301), and the ends of the plurality of anchoring locking blocks (807) that are far apart from each other are respectively inserted into the anchoring ring groove (808); Guide pins (809), in multiple quantities, are respectively connected to the anchoring sleeve (805); Multiple sliding holes (810) are provided on the corresponding anchoring blocks (807). The sliding holes (810) are elongated and the guide pins (809) pass through the sliding holes (810) so that the anchoring blocks (807) can move radially along the anchoring sleeves (805). An unlocking groove (811) is provided at the lower end of the anchoring tube (801); When the anchor tube (801) moves upward and aligns the unlocking ring groove (811) with the plurality of anchor locking blocks (807), and when the anchor tube (801) continues to be lifted, the plurality of anchor locking blocks (807) can be dislodged from the anchoring ring groove (808) and respectively locked into the unlocking ring groove (811).

5. The large-diameter seat suspension device according to claim 1, characterized in that, The top sealing section (1) includes: The mandrel tube (101) is connected at the bottom to the double female coupling (2); The outer cylinder (103) is locked and connected to the mandrel tube (101) by a third shear pin (102); A return sleeve (104) is connected to the top of the locking outer sleeve (103); The first ratchet locking ring (105) is disposed on the mandrel tube (101) and is in one-way sliding engagement with the locking outer cylinder (103) so that the locking outer cylinder (103) can only move downward; A setting cone sleeve (106) is disposed at the bottom of the locking outer cylinder (103); A support sleeve (107) is disposed on the mandrel tube (101) and located below the setting cone sleeve (106); A sealing sleeve (108) is disposed on the support sleeve (107); The support sleeve (107) can expand under the action of the setting cone sleeve (106) so that the setting rubber sleeve (108) sets with the sleeve.

6. The large-diameter seat suspension device according to claim 5, characterized in that, The seated short section (4) includes: The bottom of the sealing cylinder (401) is connected to the first connector (5); An upper limit ring (402) is disposed on the seat cylinder (401); A lower limit ring (403) is disposed on the setting cylinder (401), and an installation ring groove (404) is formed between the upper limit ring (402), the lower limit ring (403) and the setting cylinder (401); Multiple sealing blocks (405) are movably disposed within the mounting annular groove (404); Multiple push springs (406) are respectively disposed in the mounting ring groove (404). Each push spring (406) is used to push the corresponding seat block (405) to move so that the seat block (405) extends out of the mounting ring groove (404) and can press on the top of the return cylinder (104).

7. The large-diameter seat suspension device according to claim 1, characterized in that, The drop section (6) includes: The drop connector (601) is connected at the top to the first connector (5); The drop tube (602) is connected at the top to the drop connector (601) and at the bottom to the second connector (7); The drop piston (604) is connected to the drop tube (602) via a fourth shear pin (603), and a drop ring cavity (605) is provided between the drop piston (604) and the drop tube (602); A release pressure hole (606) is provided on the release tube (602) and communicates with the release ring cavity (605); Multiple limiting claws (607) are respectively disposed on the release piston (604); Multiple limit blocks (608) are provided, each located at the bottom of a corresponding limit claw (607); A limiting slot (609) is provided on the top sealing short section (1), and multiple limiting blocks (608) are respectively inserted into the limiting slot (609); The second connector (7) abuts against the plurality of the limiting blocks (608) to prevent the bottoms of the plurality of limiting claws (607) from moving toward the release tube (602).

8. The large-diameter seat suspension device according to claim 7, characterized in that, The drop section (6) also includes: The second ratchet locking ring (610) is disposed on the release tube (602) and is in one-way sliding engagement with the release piston (604) so ​​that the release piston (604) can only slide upward.

9. The large-diameter seat suspension device according to claim 7, characterized in that, The drop section (6) also includes: The anti-rotation cylinder (611) is connected to the release connector (601) via the fifth shear pin (612); The support ring (613) is vertically slidably disposed between the anti-rotation cylinder (611) and the drop tube (602); A return spring (614) is used to push the support ring (613) downward; A clearance hole (615) is provided on the anti-rotation cylinder (611); An anti-rotation block (616) passes through the relief hole (615) and is connected to the support ring (613), and the anti-rotation block (616) can move vertically along the relief hole (615); An anti-rotation slot is provided on the top sealing section (1), and the anti-rotation block (616) is inserted into the anti-rotation slot to restrict the anti-rotation cylinder (611) from rotating relative to the top sealing section (1); When the seated short section (4) is rotated and the fifth shear pin (612) is sheared, the release joint (601) can move downward relative to the anti-rotation cylinder (611) so that the second joint (7) is separated from the plurality of the limiting blocks (608) respectively.

10. A method of using a large-diameter seat suspension device according to any one of claims 1-9, characterized in that, Includes the following steps: S1, throw the ball to press down, so that the tailpipe suspension short section (3) sits; S2, continue to press down, so that the short section (6) can be released; S3, lifting and lowering the service tool assembly (200), using the setting short section (4) to control the setting of the top sealing short section (1); S4, continue to lift the service tool assembly (200) until it is pulled out of the wellhead.

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