Window closing type large-range core penetrating sliding block slip fishing socket
By designing a closed window-type large-scale core-through slider kava salvage cylinder, using components such as oblique dovetail grooves and control screws, the problem of fish damage and corrosion caused by fishing failure is solved, and efficient fishing salvage is achieved.
Patent Information
- Application Number
- CN202311533215.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-17
- Publication Date
- 2025-05-20
AI Technical Summary
When fishing, the existing salvage tubes are damaged and corroded due to the damage and corrosion of the fish, and the bearing capacity of the side walls is uncertain, resulting in the problem of salvage failure.
A closed window-type large-scale core-through slider karaoke salvage cylinder is designed. By opening an oblique dovetail groove on the inside of the hollow cylinder, installing the slider karaoke, and using parts such as the control screw and cone head, the slider karaoke can be contracted and clamped, and the salvage force is enhanced.
The salvage barrel can effectively salvage damaged and corroded fish, improve the salvage success rate, and can still provide sufficient clamping force when the side wall of the fish is poor.
Smart Images
Figure CN120020318A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of fishing tools in workover operations of oil and gas fields, and specifically to a closed-window large-range core-piercing slider slip fishing barrel. Background Art
[0002] During the oilfield exploitation process, due to the complex working environment and strong corrosiveness of the working environment, the machine wears greatly, and it is easy to drop sleeves, pipe fittings, etc. into the oilfield well, and a fishing barrel is needed to fish the sundries in the oilfield well, that is, to fish the "fish downhole".
[0003] The fishing barrels currently used are all reverse-buckle type fishing, that is, the fishing claws are clamped on the outer wall or inner wall of the sleeve or pipe fitting, and then relying on the friction between the fishing claws and the "fish downhole" when the fishing claws are lifted, the relative sliding between the fishing barrel body and the fishing claws is generated, and the fishing claws are further contracted or expanded to make the clamping between the fishing claws and the "fish downhole" tighter, so as to realize the fishing of the fish downhole; or relying on external power to drive the fishing claws to contract or expand to achieve the fishing of the fish downhole.
[0004] In the actual application process, the situation of the "fish downhole" is very complex. When fishing the fish top, due to the breakage and corrosion of the fish downhole, the bearing capacity of its side wall is an uncertain factor, and during the fishing and lifting process, it is easy to have the situation of fishing failure. Therefore, the present invention provides a closed-window large-range core-piercing slider slip fishing barrel. Summary of the Invention
[0005] Aiming at the deficiencies of the prior art, the present invention provides a closed-window large-range core-piercing slider slip fishing barrel, which solves the problem that the bearing capacity of the side wall of the fish downhole is an uncertain factor due to breakage and corrosion, and it is easy to have fishing failure during the fishing and lifting process, and can fish the fish downhole with fragments buried, damaged, corroded and reduced in diameter at the fish head.
[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A closed-window large-range core-piercing slider slip fishing barrel, including a hollow cylindrical barrel body, the top end of the hollow cylindrical barrel body is fixedly installed with an upper sub, the inner wall of the hollow cylindrical barrel body is provided with at least two inclined dovetail grooves along the axial direction of the hollow cylindrical barrel body, when the inclined dovetail grooves extend from top to bottom, they incline towards the center of the hollow cylindrical barrel body, and each of the inclined dovetail grooves is slidably connected with a slider slip, and one side surface of the slider slip facing the inside of the hollow cylindrical barrel body is fixedly connected with an alloy slip tooth surface; A guiding barrel and a disk body with a threaded hole are fixedly installed at the inner top position of the hollow cylindrical barrel body, a telescopic barrel is slidably connected inside the guiding barrel, a taper head is rotatably installed at the bottom end of the telescopic barrel, a milling tooth is arranged at the bottom end of the taper head, and a control screw is arranged inside the guiding barrel, and the control screw passes through the threaded hole of the disk body with a threaded hole; The operating screw rod is successively provided with a hexagon drive end, an upper connecting rod, a first threaded section, a smooth rod section, a second threaded section, and a connecting end integrally connected from top to bottom. The connecting end is fixedly connected to the cone head, and both the first threaded section and the second threaded section are engaged with the threaded holes of a disc body having threaded holes.
[0007] Preferably, a guide shoe is fixedly installed at the bottom end of the hollow cylindrical body. A guiding conical surface is arranged inside the guide shoe, and a guide shoe groove is arranged at the bottom end of the guide shoe.
[0008] Preferably, a first double-stage trapezoidal female thread is arranged at the bottom end of the hollow cylindrical body, and a double-stage trapezoidal male thread is arranged at the top end of the guide shoe.
[0009] Preferably, a second double-stage trapezoidal female thread is arranged at the top end of the hollow cylindrical body. The pressing flange fixedly connected to the top end of the guiding cylinder body and the outer contour of the disc body having threaded holes are both located at the first-stage connection port of the second double-stage trapezoidal female thread. The first male thread portion at the bottom end of the upper joint is fixedly installed at the second-stage connection port of the second double-stage trapezoidal female thread, and the pressing flange and the outer contour of the disc body having threaded holes are pressed and fixed at the first-stage connection port of the second double-stage trapezoidal female thread by relying on the bottom end of the upper joint.
[0010] Preferably, there are three inclined dovetail grooves and slider slips, and they are annularly arrayed along the inner wall of the hollow cylindrical body.
[0011] Preferably, a first female thread portion is arranged at the top of the upper joint. A water eye is arranged inside the upper joint, and a water hole is opened at the end of the disc body having threaded holes.
[0012] Preferably, the telescopic cylinder body is a conical cylinder body that is larger at the top and smaller at the bottom.
[0013] Preferably, a threaded nozzle is fixedly connected to the top end of the cone head. The connecting end is inserted into the inside of the threaded nozzle and is threadedly connected to the threaded nozzle through a connecting sleeve to press and fix the connecting end and the threaded nozzle.
[0014] Preferably, the tooth surface of the alloy slip is an inverted tooth.
[0015] The present invention provides a closed-window type large-range core-piercing slider slip fishing barrel. It has the following beneficial effects: 1. By providing an inclined dovetail groove on the inner side of a hollow cylindrical barrel, installing a sliding block chuck inside the inclined dovetail groove, and making the inclined dovetail groove incline towards the center of the hollow cylindrical barrel when extending from top to bottom. During fishing, the fish top is used to jack up the sliding block chuck. When the sliding block chuck moves upward, it will simultaneously move radially outward along the hollow cylindrical barrel, causing multiple sliding block chucks to be in an open state. The fish top enters the inside of multiple sliding block chucks, and then the operating screw is driven to rotate (in the initial state, the second threaded section is threadedly connected to the threaded hole of the disk body with a threaded hole), causing the operating screw to push down the cone head. The cone head moves downward, enabling the cone head and the telescopic barrel to enter the inside of the fish. Then, the hollow cylindrical barrel is lifted upward, and the sliding block chuck slides downward relative to the hollow cylindrical barrel, causing multiple sliding block chucks to contract. And as the upward lifting force increases, the contraction force increases, realizing the lifting of the fish. Since the cone head and the telescopic barrel are located inside the fish, when the side wall bearing capacity of the fish is poor, the sliding block chuck can still have sufficient fishing force (clamping force).
[0016] 2. By providing milling teeth at the bottom of the cone head and providing a first threaded section, a smooth rod portion, and a second threaded section on the operating screw. When the fish top is blocked by debris, the operating screw rotates, and the second threaded section cooperates with the threaded hole of the disk body with a threaded hole, causing the operating screw to move downward, and then pushing the cone head downward, so that the milling teeth are pressed against the debris on the fish top. When the smooth rod portion cooperates with the threaded hole of the disk body with a threaded hole, the operating screw can be rotated at high speed, driving the cone head and the milling teeth to rotate, drilling a hole in the fish top, so as to facilitate the cone head and the telescopic barrel to enter the inside of the fish, thereby enabling better fishing of the fish. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a perspective view of a closed-window large-range core-piercing sliding block chuck fishing barrel proposed by the present invention; Figure 2 is a front view of a closed-window large-range core-piercing sliding block chuck fishing barrel proposed by the present invention; Figure 3 is Figure 2 a cross-sectional view taken along the section line A-A in Figure 4 is Figure 2 a cross-sectional view taken along the section line B-B in Figure 5 is Figure 3 a partially enlarged view at C in Figure 6 is Figure 3 a partially enlarged view at D in Figure 7 is a perspective view of the operating screw of a closed-window large-range core-piercing sliding block chuck fishing barrel proposed by the present invention; Figure 8This is a three-dimensional view of the slider slips of a closed-window large-range through-core slider slips fishing barrel proposed by the present invention.
[0018] Among them, 1. Hollow cylindrical barrel; 2. Guide shoe; 3. Upper sub; 31. First male thread part; 32. First female thread part; 4. Oblique dovetail groove; 5. Slider slips; 6. Alloy slips tooth surface; 7. Guide barrel; 71. Compression flange; 8. Telescopic barrel; 9. Disc body with threaded holes; 10. Manipulating screw; 1001. First thread section; 1002. Second thread section; 1003. Smooth rod part; 1004. Upper connecting rod; 1005. Hexagonal drive end; 1006. Connecting end; 11. Taper head; 111. Milling teeth; 12. Connecting sleeve. Detailed implementation manners
[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0020] Embodiment 1: As Figures 1-8 shown, the embodiment of the present invention provides a closed-window large-range through-core slider slips fishing barrel, including a hollow cylindrical barrel 1. An upper sub 3 is fixedly installed at the top of the hollow cylindrical barrel 1, and the top of the upper sub 3 is used for installation and fixation with an oil well fishing pipe. At least two oblique dovetail grooves 4 along the axial direction of the hollow cylindrical barrel 1 are provided on the inner wall of the hollow cylindrical barrel 1. When the oblique dovetail grooves 4 extend from top to bottom, they are inclined towards the center of the hollow cylindrical barrel 1. Each oblique dovetail groove 4 is slidably connected with a slider slips 5. Preferably, three oblique dovetail grooves 4 and slider slips 5 are provided, and they are annularly arranged along the inner wall of the hollow cylindrical barrel 1. The three slider slips 5 form an annular clamping area. When the three slider slips 5 slide upward synchronously, the formed annular clamping area increases; when the three slider slips 5 slide downward synchronously, the formed annular clamping area decreases.
[0021] One side of the slider slips 5 facing the inside of the hollow cylindrical barrel 1 is fixedly connected with an alloy slips tooth surface 6, which is used to improve the connection stability between the inner side of the slider slips 5 and the side wall of the fish left in the well, and avoid the fish left in the well from slipping during the upward lifting process. The alloy slips tooth surface 6 is an inverted buckle tooth, which is easy for the fish left in the well to push up the slider slips 5. After the side wall of the fish left in the well contacts the alloy slips tooth surface 6, the inverted buckle teeth can firmly clamp the fish left in the well during the upward lifting process.
[0022] At the inner top position of the hollow cylindrical barrel 1, a guiding barrel 7 and a disc 9 with a threaded hole are fixedly installed. A telescopic barrel 8 is slidably connected inside the guiding barrel 7. A tapered head 11 is rotatably installed at the bottom end of the telescopic barrel 8. A limiting structure for restricting the relative axial sliding between the tapered head 11 and the telescopic barrel 8 is provided between the tapered head 11 and the telescopic barrel 8, so that the tapered head 11 can rotate relative to the telescopic barrel 8 and can also drive the telescopic barrel 8 to move up and down. A milling tooth 111 is provided at the bottom end of the tapered head 11, which is used to drill a hole at the top of the debris when there is debris at the fish top. A control screw 10 is arranged inside the guiding barrel 7, and the control screw 10 passes through the threaded hole of the disc 9 with a threaded hole.
[0023] The control screw 10 is sequentially provided with a hexagonal driving end 1005, an upper connecting rod 1004, a first threaded section 1001, a smooth rod portion 1003, a second threaded section 1002, and a connecting end 1006 integrally connected from top to bottom. The connecting end 1006 is fixedly connected to the tapered head 11. Both the first threaded section 1001 and the second threaded section 1002 are matched with the threaded hole of the disc 9 with a threaded hole.
[0024] During operation, for the lower hollow cylindrical barrel 1, the fish to be fished enters the inside of the hollow cylindrical barrel 1, and the fish top pushes the three slider slips 5 upwards. At this time, the annular clamping area formed by the three slider slips 5 increases, and the fish to be fished is located inside the annular clamping area. Then, the drill tool is used to drive the control screw 10 to rotate (in the initial state, the second threaded section 1002 is threadedly connected to the threaded hole of the disc 9 with a threaded hole), so that the control screw 10 pushes the tapered head 11 downwards, and the tapered head 11 moves downwards, so that the tapered head 11 and the telescopic barrel 8 both enter the inside of the fish to be fished. Then, the hollow cylindrical barrel 1 is lifted upwards, and the slider slips 5 slide downwards relative to the hollow cylindrical barrel 1 (there will be a basic frictional force when the slider slips 5 contact the side wall of the fish to be fished), so that the annular clamping area formed by the three slider slips 5 shrinks, and as the upward pulling force increases, the contraction force increases, realizing the lifting of the fish to be fished. Since the tapered head 11 and the telescopic barrel 8 are located inside the fish to be fished, when the bearing capacity of the side wall of the fish to be fished is poor, the slider slips 5 can still have sufficient fishing force (clamping force).
[0025] When the fish top is blocked by debris, the control screw 10 rotates, and the second threaded section 1002 is matched with the threaded hole of the disc 9 with a threaded hole, so that the control screw 10 moves downwards, and then pushes the tapered head 11 downwards, so that the milling tooth 111 presses on the debris at the fish top. When the smooth rod portion 1003 is matched with the threaded hole of the disc 9 with a threaded hole, the control screw 10 can be rotated at a high speed, driving the tapered head 11 and the milling tooth 111 to rotate, and drilling a hole at the fish top, so as to facilitate the entry of the tapered head 11 and the telescopic barrel 8 into the inside of the fish to be fished, thereby enabling better fishing of the fish to be fished.
[0026] In one embodiment, a guide shoe 2 is fixedly installed at the bottom end of the hollow cylindrical barrel 1. A guiding conical surface is arranged inside the guide shoe 2, and a guide shoe bevel is arranged at the bottom end of the guide shoe 2.
[0027] The drill string is used to drive the upper sub 3 to rotate. The hollow cylindrical barrel 1 and the guide shoe 2 fixed to the upper sub 3 will both rotate. The rotating guide shoe bevel can enable the fish to quickly enter the guide shoe 2. As the upper sub 3, the hollow cylindrical barrel 1, and the guide shoe 2 move downward together, the fish enters the guiding conical surface, and the fish is positioned at this place, so that the axis of the fish is basically coincident with the axis of the hollow cylindrical barrel 1.
[0028] In one embodiment, a first double-stage trapezoidal female thread is arranged at the bottom end of the hollow cylindrical barrel 1, and a double-stage trapezoidal male thread is arranged at the top end of the guide shoe 2. The connection method of the double-stage trapezoidal male and female threads can make the installation of the guide shoe 2 more stable.
[0029] In one embodiment, a second double-stage trapezoidal female thread is arranged at the top end of the hollow cylindrical barrel 1. The outer contours of the pressing flange 71 fixedly connected to the top end of the guiding barrel 7 and the disk body 9 with threaded holes are both located at the first-stage connection port of the second double-stage trapezoidal female thread. The first male thread part 31 at the bottom end of the upper sub 3 is fixedly installed with the second-stage connection port of the second double-stage trapezoidal female thread, and the outer contours of the pressing flange 71 and the disk body 9 with threaded holes are pressed and fixed at the first-stage connection port of the second double-stage trapezoidal female thread by the bottom end of the upper sub 3.
[0030] According to the use requirements, the disk body 9 with threaded holes, the guiding barrel 7, and the telescopic barrel 8 can be disassembled, which is more convenient for salvaging some conventional fish.
[0031] In one embodiment, a first female thread part 32 is arranged at the top of the upper sub 3. There is a water eye inside the upper sub 3. A water hole is opened at the end of the disk body 9 with threaded holes, and there are also water flow holes on the guiding barrel 7 and the telescopic barrel 8, so that the fish can be flushed during the salvaging process.
[0032] The telescopic barrel 8 is a conical barrel that is larger at the top and smaller at the bottom, so as to be able to enter the inside of the fish.
[0033] In one embodiment, a threaded nozzle is fixedly connected to the top end of the cone head 11. The connecting end 1006 is inserted into the inside of the threaded nozzle and is threadedly connected to the threaded nozzle through a connecting sleeve 12, and the connecting end 1006 is pressed and fixed to the threaded nozzle.
[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A closed window type large range core-penetrating slider slip overshot, comprising a hollow cylindrical body (1), an upper joint (3) being fixedly mounted on the top of the hollow cylindrical body (1), characterized in that: The inner wall of the hollow cylindrical body (1) is provided with at least two oblique dovetail grooves (4) along the axial direction of the hollow cylindrical body (1), and the oblique dovetail grooves (4) are inclined toward the center of the hollow cylindrical body (1) when extending from top to bottom, and a slider slip (5) is slidably connected in each of the oblique dovetail grooves (4), and an alloy slip tooth surface (6) is fixedly connected to a side surface of the slider slip (5) facing the inside of the hollow cylindrical body (1); A guide cylinder (7) and a disk (9) having a threaded hole are fixedly mounted at the top position of the interior of the hollow cylindrical body (1); a telescopic cylinder (8) is slidably connected to the inner side of the guide cylinder (7); a cone head (11) is rotatably mounted on the bottom end of the telescopic cylinder (8); a milling tooth (111) is provided at the bottom end of the cone head (11); an operating screw (10) is provided inside the guide cylinder (7); the operating screw (10) passes through the threaded hole of the disk (9) having a threaded hole; The operating screw rod (10) is provided with an integrally connected hexagonal transmission end (1005), an upper connecting rod (1004), a first threaded section (1001), a smooth rod portion (1003), a second threaded section (1002), and a connecting end (1006) in sequence from top to bottom; the connecting end (1006) is fixedly connected to the cone head (11); the first threaded section (1001) and the second threaded section (1002) are both matched with the threaded holes of the disk body (9) having the threaded holes.
2. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: A guide shoe (2) is fixedly mounted on the bottom end of the hollow cylindrical body (1), a guide cone surface is provided on the inner side of the guide shoe (2), and a guide shoe groove is provided at the bottom end of the guide shoe (2).
3. A closed window type large range core-penetrating slider slip overshot according to claim 2, characterized in that: The bottom end of the hollow cylindrical body (1) is provided with a first double-stage trapezoidal female buckle, and the top end of the guide shoe (2) is provided with a double-stage trapezoidal male buckle.
4. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: A second double-stage trapezoidal female buckle is arranged at the top end of the hollow cylindrical body (1); a clamping flange (71) fixedly connected to the top end of the guide cylinder (7) and an outer contour of a disk body (9) with a threaded hole are both located at a first-stage connection port of the second double-stage trapezoidal female buckle; a first male buckle portion (31) at the bottom end of the upper joint (3) is fixedly mounted to the second-stage connection port of the second double-stage trapezoidal female buckle, and the clamping flange (71) and the outer contour of the disk body (9) with a threaded hole are clamped and fixed to the first-stage connection port of the second double-stage trapezoidal female buckle by relying on the bottom end of the upper joint (3).
5. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: The oblique dovetail grooves (4) and slider slips (5) are each provided in three numbers and are distributed in a circular array along the inner wall of the hollow cylindrical body (1).
6. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: The top of the upper joint (3) is provided with a first female buckle portion (32), the inner side of the upper joint (3) is provided with a water hole, and the end of the disk body (9) with the threaded hole is provided with a water hole.
7. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: The telescopic cylinder (8) is a conical cylinder that is larger at the top and smaller at the bottom.
8. The closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: The top end of the cone head (11) is fixedly connected to a threaded nozzle, and the connecting end (1006) is inserted into the interior of the threaded nozzle and is threadably connected to the threaded nozzle via a connecting sleeve (12), thereby pressing and fixing the connecting end (1006) to the threaded nozzle.
9. A closed window type large range core-penetrating slider slip overshot according to claim 1, characterized in that: The alloy slip tooth surface (6) is an undercut tooth.