A large-pitch hanging device

Abstract

The present application relates to a large drift diameter hanger device, comprising a running-in tool and a hanger. The running-in tool comprises a support mandrel and a central pipe connected with the support mandrel, the support mandrel is provided with a releasing assembly, and the central pipe is provided with a connecting assembly. The hanger comprises a second cylinder body which is limited with the releasing assembly, and a third cylinder body connected with the second cylinder body, the second cylinder body can also be limited with the connecting assembly, and the third cylinder body is provided with a setting assembly for setting a downhole casing. The connecting assembly is configured to be limited with the central pipe after the releasing assembly is released, so as to completely take out the running-in tool from the hanger. Thus, most of the structures for implementing the pressure holding and releasing functions are arranged on the running-in tool, so that the hanger has a more compact structure and a larger drift diameter, so as to meet the construction requirements of the main wellbore tie-in operation.

Description

Technical Field

[0001] This invention relates to the field of oil and gas well cementing and completion technology, specifically to a large-diameter suspension device. Background Technology

[0002] Currently, most hydraulic suspension systems with hydraulic mounting and / or sealing functions integrate the hydraulic structure into the main body of the suspension system. Due to the limited internal space of the suspension system body, an overly complex hydraulic structure can severely affect the suspension system's borehole diameter. Conventional small-diameter suspension systems cannot accommodate larger tools during subsequent construction, thus failing to meet the requirements for main shaft reconnection during high-level branch well construction. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the present invention provides a large-diameter suspension device, which has a more streamlined and compact structure and a larger diameter to meet the construction requirements of the main shaft reconnection operation.

[0004] The technical solution adopted by this invention to solve its technical problem is: to provide a large-diameter suspension device, comprising,

[0005] A feeding tool, comprising a support mandrel and a central tube connected to the support mandrel, wherein a release assembly is provided on the support mandrel and a connecting assembly is provided on the central tube; and

[0006] The suspension device includes a second cylinder that forms a limiting position with the release assembly, and a third cylinder connected to the second cylinder. The second cylinder can also form a limiting position with the connecting assembly. The third cylinder is provided with a mounting assembly for mounting a downhole casing.

[0007] The connecting component is configured to release its restraint from the second cylinder after the release component has released its grip, and to form a restraint with the central tube, so that the feeding tool can be completely removed from the hanger.

[0008] Furthermore, the connecting assembly includes a locking sleeve, a locking block connected to the locking sleeve, and a connecting pin passing through the locking block and the locking sleeve in an axial direction. The locking block can be partially received in a second receiving groove of the second cylinder so that the second cylinder and the connecting assembly form a limiting position.

[0009] Furthermore, the locking block is provided with a hole through which the connecting pin passes, the diameter of the hole being larger than the diameter of the connecting pin, so as to allow the locking block to move radially inward when the feeding tool removes the hanger, thereby partially receiving it in the groove of the central tube and releasing the connecting assembly from the second cylinder.

[0010] Furthermore, the mounting assembly includes a guide sleeve disposed on the third cylinder, a fixed sleeve arranged opposite to the guide sleeve, and a plurality of slips connecting the fixed sleeve. The guide sleeve has a plurality of guide openings facing the fixed sleeve for receiving each slip. Each slip is configured to extend radially outward when the fixed sleeve moves toward the guide sleeve, so as to mount the casing downhole.

[0011] Furthermore, a guide step is provided on the side wall of the guide port, and a guide portion is provided on the side wall of the slip. The guide step is configured to allow the slip to extend radially outward through the guide portion.

[0012] Furthermore, the fixed sleeve connects to the seated piston cylinder, a second hydraulic chamber is constructed between the seated piston cylinder and the third cylinder, and a positioning screw is provided between the seated piston cylinder and the third cylinder. Only when the pressure of the fluid in the second hydraulic chamber reaches a first pressure can the seated piston cylinder and the positioning screw push the fixed sleeve to move.

[0013] Furthermore, the release assembly includes an elastic claw disposed on the support spindle, the upper end of the elastic claw being provided with an open ring, the open ring being configured to form an axially limited position with the first limiting groove when the elastic claw moves in an axially upward direction relative to the support spindle into the first limiting groove of the support spindle.

[0014] Furthermore, the lower end of the elastic claw is provided with a protrusion, which is received in a first receiving groove of the second cylinder. The first receiving groove is configured to guide the protrusion away from the first receiving groove when the elastic claw moves upward in the axial direction relative to the second cylinder, so as to release the limiting position of the release assembly and the second cylinder, and is configured to abut the protrusion when the elastic claw moves downward in the axial direction relative to the second cylinder.

[0015] Furthermore, a release piston cylinder is provided between the elastic claw and the support spindle, and a first hydraulic chamber is constructed between the release piston cylinder and the support spindle. When the pressure of the fluid in the first hydraulic chamber reaches the second pressure, the release piston cylinder can push the elastic claw to move axially upward relative to the support spindle.

[0016] Furthermore, a dropper is provided between the elastic claw and the hanger. The dropper is provided with a toothed structure for connecting the adapter on the support spindle. The toothed structure is configured to allow the adapter to move axially downward relative to the dropper after the adapter rotates relative to the dropper.

[0017] Furthermore, the dental insert structure includes a first protrusion and a second protrusion that forms a step shape with the first protrusion in the circumferential direction.

[0018] When the toothed structure of the dropper engages with the toothed structure of the adapter, the first protrusion of the dropper abuts against the second protrusion of the adapter in the axial direction, and the first protrusion of the dropper abuts against the first protrusion of the adapter in the circumferential direction.

[0019] Furthermore, the adapter is configured to push the support spindle in an axially downward direction after rotation relative to the release cylinder, so that the elastic pawl can move in an axially upward direction relative to the support spindle.

[0020] The beneficial effects of this invention are as follows: This invention provides a large-diameter suspension device, including a delivery tool and a suspension unit. The delivery tool includes a support mandrel and a central tube connected to the support mandrel. A release assembly is provided on the support mandrel, and a connecting assembly is provided on the central tube. The suspension unit includes a second cylinder that forms a limiting position with the release assembly, and a third cylinder connected to the second cylinder. The second cylinder can also form a limiting position with the connecting assembly. A mounting assembly for mounting downhole casing is provided on the third cylinder. The connecting assembly is configured to release its limiting position from the second cylinder and form a limiting position with the central tube after the release assembly has released its grip, so that the delivery tool can be completely removed from the suspension unit. This arrangement places most of the pressure-holding and release functions on the delivery tool, resulting in a more streamlined and compact structure and a larger diameter for the suspension unit, thus meeting the construction requirements of main shaft reconnection operations.

[0021] Furthermore, the suspension device strengthens the connection between the delivery tool and the hanger through connecting components, preventing premature separation of the delivery tool and hanger due to accidental release during the downhole process, thus ensuring the reliability of the suspension device. Moreover, the delivery tool's release component can achieve both hydraulic and mechanical release, further guaranteeing the reliability of the suspension device. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 The image shown is a structural cross-sectional view of a large-diameter suspension device.

[0024] Figure 2 As shown Figure 1 The diagram shows a cross-sectional view of section A of the large-diameter suspension device.

[0025] Figure 3As shown Figure 1 The diagram shows a cross-sectional view of section B of the large-diameter suspension device.

[0026] Figure 4 As shown Figure 1 The diagram shows a cross-sectional view of section C of the large-diameter suspension device.

[0027] Figure 5 As shown Figure 1 The diagram shows a cross-sectional view of section D of the large-diameter suspension device.

[0028] Figure 6 As shown Figure 3 The large-diameter suspension device AA is shown in a transverse sectional view.

[0029] Figure 7 As shown Figure 1 The diagram shows the structure of the dropper and adapter of the large-diameter suspension device from one perspective.

[0030] Figure 8 As shown Figure 1 The diagram shows the structural design of the seat assembly of the large-diameter suspension device from one perspective.

[0031] Figure 9 As shown Figure 8 The diagram shows the structural design of the seat-mounted assembly's clasp from one viewpoint.

[0032] In the figures, the following reference numerals are used: 100, suspension device; 10, feeding tool; 11, upper connector; 111, conversion connector; 112, first limiting sleeve; 113, stabilizer; 12, support spindle; 121, first through hole; 122, support connector; 123, first limiting groove; 13, central tube; 131, groove; 14, release assembly; 141, second limiting sleeve; 142, elastic claw; 1421 143. Protrusion; 144. Opening ring; 145. Connecting sleeve; 146. Release piston cylinder; 147. Shear pin; 148. First hydraulic chamber; 159. Release cylinder; 160. Toothed structure; 161. First protrusion; 162. Second protrusion; 161. Connecting assembly; 162. Locking sleeve; 163. Locking block; 164. Connecting pin; 165. Mounting hole; 166. Hole; 17. Sealing sleeve; 18. Lower connector;

[0033] 20. Suspension device; 21. First cylinder; 22. Second cylinder; 221. First receiving groove; 222. Second receiving groove; 23. Third cylinder; 231. Second through hole; 232. Guide groove; 24. Seat assembly; 241. Guide sleeve; 2411. Guide opening; 2412. Guide step; 242. Fixing sleeve; 2421. Connection port; 243. Seat piston cylinder; 244. Collet; 2441. Seat tooth; 2442. Connecting part; 2443. Guide part; 245. Second hydraulic chamber; 246. Chamber; 247. Positioning screw. Detailed Implementation

[0034] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] refer to Figure 1-5 As shown, the present invention provides a large-diameter suspension device 100 including a delivery tool 10 and a hanger 20 disposed outside the delivery tool 10. The delivery tool 10 is configured to deliver the hanger 20 downhole using drill pipe, and then release the hanger 20 after it has been set in place by pressurization, thus leaving only the hanger 20 downhole. The present invention integrates the hydraulic function and the release function into the delivery tool 10, while the hanger 20 retains only the suspension function, ensuring a more streamlined and compact structure. This allows the hanger 20 to have a large diameter, thereby allowing larger tools to pass through during subsequent construction.

[0036] refer to Figure 1-3 As shown, in some embodiments, the feeding tool 10 includes an upper connector 11, a support spindle 12 connected to the upper connector 11, and a central tube 13 connected to the support spindle 12. A conversion connector 111 is provided between the upper connector 11 and the support spindle 12, serving both to connect the upper connector 11 and the support spindle 12 and to install a first limiting sleeve 112. The first limiting sleeve 112 is fixed to the outside of the conversion connector 111 by a set screw, thereby limiting the suspension device 20 in the axial upward direction during the sitting and hydraulic release processes. The first limiting sleeve 112 moves axially upward under the action of the suspension device 20 when the feeding tool 10 mechanically releases its grip. In some embodiments, the upper connector 11, the support spindle 12, and the conversion connector 111 may be connected by threads.

[0037] In some embodiments, the upper connector 11 is also provided with a centralizer 113 to ensure the coaxiality of the delivery tool 10 and the downhole casing during the process of lowering the delivery tool 10 down into the well and during the process of raising the delivery tool 10 out of the well.

[0038] Combination Figure 1-3 As shown, in some embodiments, a release assembly 14 is provided on the outside of the support spindle 12 for releasing the device after the hanger 20 is mounted. The release assembly 14 is configured to perform the release operation hydraulically and / or mechanically to ensure the reliability of the release operation. The release assembly 14 includes a second limiting sleeve 141 disposed on the support spindle 12 and an elastic claw 142 connected to the second limiting sleeve 141. The upper end of the elastic claw 142 is used to connect to the second limiting sleeve 141, while the lower end of the elastic claw 142 is configured to form an axial limit between the feed tool 10 and the hanger 20 before the release operation, and to retract radially inward under the action of the hanger 20 during the release operation to release the limit between the feed tool 10 and the hanger 20. An open ring 143 is also provided between the upper inner wall of the elastic claw 142 and the outer wall of the support spindle 12. The inner diameter of the open ring 143 is smaller than the outer diameter of the support spindle 12. During installation, the open ring 143 can elastically deform under the action of a radially outward force to fit onto the support mandrel 12. Then, the open ring 143 contracts radially inward, thereby mounting itself onto the support mandrel 12.

[0039] In some embodiments, during hydraulic or mechanical release, the resilient claw 142 and the second limiting sleeve 141 can move axially upward relative to the support spindle 12. Until the open ring 143 moves to the first limiting groove 123 on the support spindle 12, the open ring 143 retracts radially inward into the first limiting groove 123. At this point, the open ring 143, through the first limiting groove 123, limits the resilient claw 142 axially downward, preventing the resilient claw 142 from moving further axially downward relative to the support spindle 12.

[0040] In some embodiments, a connecting sleeve 144 is further provided between the second limiting sleeve 141 and the elastic claw 142 for connecting the second limiting sleeve 141 and the elastic claw 142. Preferably, the second limiting sleeve 141, the connecting sleeve 144 and the elastic claw 142 can be connected by threads.

[0041] Combination Figure 3As shown, in some embodiments, the release assembly 14 further includes a release piston cylinder 145 disposed between the elastic claw 142 and the support spindle 12. The release piston cylinder 145 is fixed to the support spindle 12 by a shear pin 146. Several seals are provided between the inner wall of the release piston cylinder 145 and the outer wall of the support spindle 12 to form a first hydraulic chamber 147 between the release piston cylinder 145 and the support spindle 12. A first through hole 121 is provided on the support spindle 12 to connect the first hydraulic chamber 147 and the internal cavity of the support spindle 12. During the hydraulic release process, the high-pressure fluid inside the support spindle 12 enters the first hydraulic chamber 147 through the first through hole 121, so that the release piston cylinder 145, under the action of hydraulic pressure, shears the shear pin 146 and moves in an axially upward direction, thereby pushing the elastic claw 142 to move in an axially upward direction on the support spindle 12.

[0042] refer to Figure 3 , Figure 3 and Figure 7 As shown, in some embodiments, the drop assembly 14 further includes a drop cylinder 148 disposed between the resilient claw 142 and the hanger 20. The upper end of the drop cylinder 148 is provided with a jaw clamp structure 15 for connecting the adapter 111. The jaw clamp structure 15 is configured to allow the adapter 111 to move axially downward relative to the drop cylinder 148 after the adapter 111 has rotated relative to the drop cylinder 148. The lower end of the drop cylinder 148 abuts against the hanger 20.

[0043] Combination Figure 7 As shown, in some embodiments, the toothed structure 15 includes a first protrusion 151 and a second protrusion 152 forming a step shape with the first protrusion 151 in the circumferential direction. At the upper end of the hand-dropping device 148, the three toothed structures 15 are arranged in a counterclockwise direction in the circumferential direction ( Figure 7 The three toothed structures 15 are evenly arranged in a clockwise direction in the circumferential direction on the lower surface of the adapter 111.

[0044] Before the mechanical release, the jaw structure 15 of the release cylinder 148 engages with the jaw structure 15 of the adapter 111. At this time, the first protrusion 151 of the jaw structure 15 of the release cylinder 148 abuts against the second protrusion 152 of the jaw structure 15 of the adapter 111 in the axial direction, and abuts against the first protrusion 151 of the jaw structure 15 of the adapter 111 in the circumferential direction.

[0045] When the mechanical release occurs, the adapter 111 rotates counterclockwise relative to the release cylinder 148, causing the jaw structure 15 of the adapter 111 to disengage from the jaw structure 15 of the release cylinder 148. At this time, the second protrusion 152 of the jaw structure 15 of the adapter 111 and the second protrusion 152 of the jaw structure 15 of the release cylinder 148 are axially opposite each other. Therefore, the adapter 111 can drive the support spindle 12 to move axially downward relative to the release cylinder 148. During this process, because the suspension device 20 limits the elastic claw 142 axially downward, the elastic claw 142, the open ring 143, and the second limiting sleeve 141 move upward relative to the support spindle 12 until the open ring 143 moves to the first limiting groove 123 on the support spindle 12.

[0046] In some embodiments, a support joint 122 is further provided between the support mandrel 12 and the central tube 13. The support joint 122 can be threadedly connected to the support mandrel 12 and the central tube 13.

[0047] refer to Figure 1-3 and Figure 6 As shown, in some embodiments, a connecting assembly 16 is provided on the central tube 13 to increase the reliability of the connection between the feeding tool 10 and the hanger 20, preventing the feeding tool 10 from being lost due to unexpected circumstances during the lowering of the suspension device 100, thereby preventing premature separation of the feeding tool 10 and the hanger 20. The connecting assembly 16 includes a locking sleeve 161, a plurality of locking blocks 162 disposed on the locking sleeve 161, and a connecting pin 163 for connecting the locking sleeve 161 and the locking blocks 162. The locking sleeve 161 is provided with a plurality of mounting holes 164 extending radially inward for mounting each locking block 162. Each locking block 162 is provided with a through hole 165 extending axially for the connecting pin 163 to pass through. The connecting pin 163 can be connected to the locking sleeve 161 by threads or set screws. The diameter of the connecting pin 163 is smaller than the diameter of the hole 165 so as to allow the locking block 162 to move radially within the mounting hole 164. This allows the locking block 162 to be positioned near the radially outward during the lowering of the suspension device 100, ensuring that the locking block 162 protrudes from the circumferential sidewall of the locking sleeve 161, so that the locking block 162 can form an axially limited position with the suspension device 20.

[0048] In some embodiments, the connecting assembly 16 further includes a sealing sleeve 166 disposed on the locking sleeve 161. The sealing sleeve 166 forms a seal between the central tube 13 and the hanger 20.

[0049] Combination Figure 5As shown, in some embodiments, the lower end of the central tube 13 is further provided with a groove 131 for forming an axially limiting position with the locking block 162. Specifically, when the feeding tool 10 is removed from the hanger 20 after being released, the central tube 13 moves axially upward relative to the connecting assembly 16 until the groove 131 moves to the locking block 162. At this time, the locking block 162 can move radially inward into the groove 131 so that an axially limiting position is formed between the locking block 162 and the central tube 13. At the same time, the locking block 162 no longer protrudes from the circumferential sidewall of the locking sleeve 161, thereby releasing the limiting position between the locking block 162 and the hanger 20. Therefore, the connecting assembly 16 can be removed from the hanger 20 together with the central tube 13, thereby ensuring that the hanger 20 has a large diameter.

[0050] In some embodiments, the lower end of the central tube 13 is also provided with a lower connector 17 for connecting components such as ball seats and blind plates.

[0051] refer to Figure 1-5 As shown, in some embodiments, the hanger 20 includes a first cylinder 21 disposed outside the support spindle 12 and the release assembly 14, a second cylinder 22 disposed outside the central tube 13 and coaxially arranged with the central tube 13. A seating assembly 24 is provided on the third cylinder 23 for seating the hanger 20. In some embodiments, the first cylinder 21, the second cylinder 22, and the third cylinder 23 are all connected by threads.

[0052] Combination Figure 3 As shown, in some embodiments, a first receiving groove 221 is provided on the inner wall of the second cylinder 22 for receiving a protrusion 1421 extending radially outward from the lower end of the elastic claw 142. The upper end wall of the first receiving groove 221 is configured to guide the protrusion 1421 away from the first receiving groove 221 when hydraulically released, so that the elastic claw 142 can continue to move in the axially upward direction. The lower end wall of the first receiving groove 221 is configured to abut against the protrusion 1421 when mechanically released, preventing the protrusion 1421 from leaving the first receiving groove 221, thereby preventing the elastic claw 142 from moving in the axially downward direction with the support spindle 12.

[0053] In some embodiments, a second receiving groove 222 is also provided on the inner wall of the second cylinder 22. The second receiving groove 222 is used to partially receive the locking block 162 when the locking block 162 is in a position close to the radial outward direction, so that the locking block 162 and the second cylinder 22 form a limit in the axial direction, thereby ensuring the reliability of the connection between the feeding tool 10 and the hanger 20.

[0054] Combination Figure 4 , Figure 8 and Figure 9As shown, in some embodiments, the seat assembly 24 includes a guide sleeve 241 disposed on the third cylinder 23, a fixed sleeve 242 disposed opposite to the guide sleeve 241, and a seat piston cylinder 243 connected to the fixed sleeve 242. A plurality of slips 244 are also disposed between the fixed sleeve 242 and the guide sleeve 241. The seat piston cylinder 243 is configured to push the fixed sleeve 242 toward the guide sleeve 241, so that the slips 244 between the fixed sleeve 242 and the guide sleeve 241 extend radially outward, thereby allowing the seat teeth 2441 on the slips 244 to engage with the inner wall of the sleeve (not shown in the figure), thus achieving seat mounting.

[0055] In some embodiments, the guide sleeve 241 has several guide openings 2411 facing the fixed sleeve 242 for installing each slip 244. Guide steps 2412 are provided on the sidewalls of the guide openings 2411 to guide the slips 244 to extend radially outward as the fixed sleeve 242 moves toward the guide sleeve 241. By arranging the slips 244 within the guide openings 2411, it can be ensured that each slip 244 and the guide sleeve 241 are always approximately within the same cylindrical plane, effectively reducing the radial dimension of the seat assembly 24, thereby ensuring that the hanger 20 can achieve a large diameter.

[0056] In some embodiments, the fixing sleeve 242 has a plurality of connection ports 2421 facing the guide sleeve 241 for mounting each latch 244. Specifically, each connection port 2421 is generally T-shaped.

[0057] In some embodiments, one end of the slip 244 is provided with a connecting portion 2442 for embedding into the connecting port 2421. Specifically, the connecting portion 2442 is a T-shaped structure that can be embedded into the connecting port 2421, so that the slip 244 and the fixing sleeve 242 can be limited in both the axial and circumferential directions, ensuring the connection strength and reliability between the slip 244 and the fixing sleeve 242. At the same time, this embedded connection method can also reduce the radial dimension of the seat assembly 24, thereby ensuring that the suspension 20 can achieve a large diameter. A guide portion 2443 is also provided on the side wall of the slip 244 for abutting against the guide step 2412. As the fixing sleeve 242 moves toward the guide sleeve 241, the guide portion 2443 slides on the guide step 2412, thereby causing the slip 244 to move in a radially outward direction.

[0058] Combination Figure 4As shown, in some embodiments, a second hydraulic chamber 245 is constructed between the seated piston cylinder 243 and the third cylinder 23. The second hydraulic chamber 245 is connected to a chamber 246 between the third cylinder 23 and the central tube 13 through a second through hole 231 on the third cylinder 23, and the chamber 246 is connected to the interior of the central tube 13 through a third through hole (not shown) on the central tube 13. Therefore, during seating, the high-pressure fluid inside the central tube 13 flows into the second hydraulic chamber 245 through the chamber 246 and the second through hole 231, so as to push the seated piston cylinder 243 to move toward the fixed sleeve 242.

[0059] In some preferred embodiments, the mounting piston cylinder 243 is connected to the third cylinder 23 by a positioning screw 247. The positioning screw 247 extends radially inward into a guide groove 232 on the third cylinder 23, while the guide groove 232 extends axially. Therefore, during mounting, the high-pressure fluid in the second hydraulic chamber 245 must overcome the friction between the positioning screw 247 and the third cylinder 23 before it can move the mounting piston cylinder 243. This significantly increases the fluid pressure required for the suspension device 20 to mount, preventing accidental mounting due to downhole pressure changes during descent, thereby improving the reliability of the suspension device 100.

[0060] Combination Figure 1-5 As shown, the process of mounting the suspension device 20 of the suspension device 100 is described in detail below. After the drill rod is connected to the connector 11, the entire suspension device 100 is lowered to the predetermined position through the drill rod, and then pressure is applied. The fluid inside the central tube 13 flows into the second hydraulic chamber 245 through the chamber 246 and the second through hole 231 until the pressure of the fluid reaches the first pressure. At this point, the piston cylinder 243 in the second hydraulic chamber 245 moves toward the guide sleeve 241, which in turn causes the fixed sleeve 242 to push the slip 244 toward the guide sleeve 241. During this process, under the guidance of the guide part 2443 and the guide step 2412, the slip 244 moves radially outward, causing the mounting teeth 2441 to embed into the inner wall of the sleeve, thereby completing the mounting.

[0061] In this embodiment, since the guide sleeve 241 is located above the fixed sleeve 242 and is connected to the third cylinder 23, the third cylinder 23 continuously exerts a downward force on the guide sleeve 241 under the weight of the tool string connected below it. At this time, since the slip 244 has already been seated, the guide sleeve 241 can still guide the slip 244 to always extend radially outward via the guide step 2412, thus keeping the hanger 20 in a seated state. Even if the fluid pressure inside the central tube 13 decreases during subsequent construction, the hanger 20 can still maintain its seated state, thereby improving the stability of the hanger 20.

[0062] Combination Figure 1-5 As shown, the hydraulic release process of the feeding tool 10 of the suspension device 100 will be described in detail below. After the ball is thrown and pressurized, the fluid in the support spindle 12 enters the first hydraulic chamber 147 through the first through hole 121. When the pressure of the fluid reaches the second pressure, the release piston cylinder 145 moves axially upward after shearing the shear pin 146, thereby pushing the elastic claw 142 to move axially upward on the support spindle 12. At this time, the guide protrusion 1421 of the upper end of the first receiving groove 221 leaves the first receiving groove 221, so that the elastic claw 142 can continue to move axially upward until the opening ring 143 moves to the first limiting groove 123 on the support spindle 12. The opening ring 143 retracts radially inward into the interior of the first limiting groove 123. At this time, the opening ring 143 forms an axially downward limit on the elastic claw 142 through the first limiting groove 123, so that the elastic claw 142 cannot move axially downward on the support spindle 12.

[0063] Then, by lifting the drill rod, the upper connector 11, support mandrel 12, central tube 13, and release assembly 14 move axially upward relative to the hanger 20 until the groove 131 on the central tube 13 moves to the locking block 162. At this time, the locking block 162 moves radially inward into the groove 131, creating an axial limit between the locking block 162 and the central tube 13, and releasing the limit between the connecting assembly 16 and the second cylinder 22. By continuing to lift the upper connector 11 by the drill rod, the entire feed tool 10 can be pulled out from the hanger 20, thereby ensuring that the hanger 20 has a large diameter.

[0064] It should be noted that the second pressure is much greater than the first pressure, so as to separate the sitting and hanging process of the suspension device 100 from the hydraulic release process, thereby avoiding the accidental hydraulic release of the suspension device 100 due to pressure changes during the sitting and hanging process.

[0065] Combination Figure 1-5 ,as well as Figure 7As shown, the mechanical release process of the feeding tool 10 of the suspension device 100 will be described in detail below. After the suspension device 20 is seated, the upper connector 11 and the conversion connector 111 are rotated counterclockwise relative to the release cylinder 148 by the drill rod, so that the jaw structure 15 of the conversion connector 111 and the jaw structure 15 of the release cylinder 148 are no longer engaged. At this time, the second protrusion 152 of the jaw structure 15 of the conversion connector 111 and the second protrusion 152 of the jaw structure 15 of the release cylinder 148 are opposite each other in the axial direction. Then, the upper connector 11 is pressed down by the drill rod, so that the conversion connector 111 drives the support spindle 12 to move in the axial downward direction relative to the release cylinder 148. During this process, the lower end wall of the first receiving groove 221 abuts against the protrusion 1421 of the elastic claw 142, preventing the protrusion 1421 from leaving the first receiving groove 221, thereby preventing the elastic claw 142 from moving in the axial downward direction with the support spindle 12. At the same time, the upper end of the first cylinder 21 can push the first limiting sleeve 112 to move upward.

[0066] Until the first limiting groove 123 on the support mandrel 12 moves to the first opening ring 143, the opening ring 143 retracts radially inward into the first limiting groove 123. Then, by lifting the upper connector 11 with the drill rod, the upper connector 11, support mandrel 12, central tube 13, and release assembly 14 move axially upward relative to the hanger 20 until the groove 131 on the central tube 13 moves to the locking block 162. At this time, the locking block 162 moves radially inward into the groove 131, forming an axial limit between the locking block 162 and the central tube 13, and releasing the limit between the connecting assembly 16 and the second cylinder 22. By continuing to lift the upper connector 11 with the drill rod, the entire feeding tool 10 can be pulled out from the hanger 20, thus ensuring the large diameter of the hanger 20.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0069] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The 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 suspension device, comprising: A feeding tool (10) comprising a support spindle (12) and a central tube (13) connected to the support spindle (12), wherein a release assembly (14) is provided on the support spindle (12) and a connecting assembly (16) is provided on the central tube (13); and The suspension device (20) includes a second cylinder (22) that is positioned relative to the release assembly (14), and a third cylinder (23) connected to the second cylinder (22). The second cylinder (22) is also positioned relative to the connecting assembly (16). The third cylinder (23) is provided with a mounting assembly (24) for mounting a downhole casing. in, The connecting component (16) is configured to release from the second cylinder (22) and to be positioned relative to the central tube (13) after the release component (14) has released the object, so that the feeding tool (10) can be completely removed from the hanger (20).

2. The large-diameter suspension device according to claim 1, characterized in that, The connecting assembly (16) includes a locking sleeve (161), a locking block (162) connected to the locking sleeve (161), and a connecting pin (163) passing through the locking block (162) and the locking sleeve (161) in an axial direction. The locking block (162) can be partially received in a second receiving groove (222) of the second cylinder (22) so that the second cylinder (22) and the connecting assembly (16) form a limit.

3. The large-diameter suspension device according to claim 2, characterized in that, The locking block (162) is provided with a hole (165) through which the connecting pin (163) passes. The diameter of the hole (165) is larger than the diameter of the connecting pin (163) so as to allow the locking block (162) to move radially inward when the feeding tool (10) removes the hanger (20), thereby partially receiving it in the groove (131) of the central tube (13) and releasing the connecting assembly (16) from the second cylinder (22).

4. The large-diameter suspension device according to any one of claims 1-3, characterized in that, The mounting assembly (24) includes a guide sleeve (241) disposed on the third cylinder (23), a fixed sleeve (242) arranged opposite to the guide sleeve (241), and a plurality of slips (244) connecting the fixed sleeve (242). The guide sleeve (241) has a plurality of guide openings (2411) facing the fixed sleeve (242) for receiving each slip (244). Each slip (244) is configured to extend radially outward when the fixed sleeve (242) moves toward the guide sleeve (241) so as to mount the casing downhole.

5. The large-diameter suspension device according to claim 4, characterized in that, The guide port (2411) has a guide step (2412) on its side wall, and the slip (244) has a guide part (2443) on its side wall. The guide step (2412) is configured to allow the slip (244) to extend radially outward through the guide part (2443).

6. The large-diameter suspension device according to claim 4, characterized in that, The fixed sleeve (242) is connected to the seated piston cylinder (243). A second hydraulic chamber (245) is constructed between the seated piston cylinder (243) and the third cylinder (23). A positioning screw (247) is provided between the seated piston cylinder (243) and the third cylinder (23). The seated piston cylinder (243) and the positioning screw (247) can only push the fixed sleeve (242) to move when the pressure of the fluid in the second hydraulic chamber (245) reaches the first pressure.

7. The large-diameter suspension device according to claim 5 or 6, characterized in that, The release assembly (14) includes an elastic claw (142) disposed on the support spindle (12). The upper end of the elastic claw (142) is provided with an open ring (143). The open ring (143) is configured to form an axially limited position with the first limiting groove (123) when the elastic claw (142) moves relative to the support spindle (12) in an axially upward direction into the first limiting groove (123) of the support spindle (12).

8. The large-diameter suspension device according to claim 7, characterized in that, The lower end of the elastic claw (142) is provided with a protrusion (1421), which is received in a first receiving groove (221) of the second cylinder (22). The first receiving groove (221) is configured to guide the protrusion (1421) away from the first receiving groove (221) when the elastic claw (142) moves upward relative to the second cylinder (22) in the axial direction, so as to release the limiting of the release assembly (14) and the second cylinder (22), and is configured to abut the protrusion (1421) when the elastic claw (142) moves downward relative to the second cylinder (22) in the axial direction.

9. The large-diameter suspension device according to claim 8, characterized in that, A release piston cylinder (145) is provided between the elastic claw (142) and the support spindle (12). A first hydraulic chamber (147) is constructed between the release piston cylinder (145) and the support spindle (12). When the pressure of the fluid in the first hydraulic chamber (147) reaches the second pressure, the release piston cylinder (145) can push the elastic claw (142) to move axially upward relative to the support spindle (12).

10. The large-diameter suspension device according to claim 8, characterized in that, A dropper (148) is also provided between the elastic claw (142) and the hanger (20). The dropper (148) is provided with a toothed structure (15) for connecting the adapter (111) on the support spindle (12). The toothed structure (15) is configured to allow the adapter (111) to move axially downward relative to the dropper (148) after the adapter (111) rotates relative to the dropper (148).

11. The large-diameter suspension device according to claim 10, characterized in that, The dental inlay structure (15) includes a first protrusion (151) and a second protrusion (152) that forms a step shape with the first protrusion (151) in the circumferential direction. When the toothed structure (15) of the dropper (148) engages with the toothed structure (15) of the adapter (111), the first protrusion (151) of the dropper (148) abuts against the second protrusion (152) of the adapter (111) in the axial direction, and the first protrusion (151) of the dropper (148) abuts against the first protrusion (151) of the adapter (111) in the circumferential direction.

12. The large-diameter suspension device according to claim 10 or 11, characterized in that, The adapter (111) is configured to push the support spindle (12) in an axially downward direction after rotation relative to the release tube (148), so that the elastic claw (142) can move in an axially upward direction relative to the support spindle (12).

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