Column quick connect tool

Abstract

The application discloses a pipe column quick connecting tool, which comprises an inverted cone core shaft structure, an axial through center hole is arranged on the inverted cone core shaft structure, an inverted cone part is arranged on the inverted cone core shaft structure, the outer diameter of the inverted cone part is tapered from a first end to a second end, the inverted cone core shaft structure is slidably sleeved in an expansion and contraction sleeve structure, a plurality of conical surface petals capable of being radially expanded and contracted under the action of the inverted cone part are arranged on the first end of the expansion and contraction sleeve structure, an outer wall of each conical surface petal is detachably connected with a slip plate, the slip plate can be tightly clamped on the inner wall of a sleeve pipe, a threaded thrust part is arranged on the second end of the inverted cone core shaft structure, and the threaded thrust part is used for driving the inverted cone core shaft structure to move. The application can quickly and directly connect and lock the sleeve pipe, changes the traditional circulating head and sleeve pipe threaded connection mode, greatly improves the wellhead tool rush mounting speed, improves the reliability of the on-site well control safety, and guarantees the on-site well control safety.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology in the petroleum industry, and in particular to a quick connection tool for tubing strings. Background Technology

[0002] Well control safety is the greatest benefit of an oilfield. Reliable well control tools are essential for all operations, including drilling, testing, and workover, providing a safe working environment and ensuring the wellhead is always controllable to guarantee well control safety. Currently, in the special technological environment of oilfields, the well control tools available are insufficient to fully meet the requirements for controlling well control risks, particularly regarding run-in pipe operations and blowout prevention equipment. During run-in pipe, screen pipe, and combined drilling operations, there are often no internal blowout preventers (BOPs) in the well, and the surface BOP lacks suitable rubber cores, posing a serious well control risk. In routine field operations, when a blowout occurs during run-in pipe or screen pipe, a quick connection of a stopcock valve and circulation head is attempted, but the increased weight and height of the tools exacerbate the difficulty of this attempt, often resulting in multiple failed attempts.

[0003] Currently, there are limited means to quickly handle overflows during casing running operations. Conventional well control tools are cumbersome, time-consuming, and labor-intensive, and cannot guarantee the rapid and reliable connection of wellhead blowout preventers. The main method for handling overflows during casing running operations in existing technologies is to quickly connect the casing circulation head and the blowout preventer. However, the quick connection of the circulation head to the casing threads is time-consuming, requires highly skilled personnel, and has low operational safety and convenience.

[0004] Therefore, based on years of experience and practice in related industries, the inventor proposes a quick connection tool for tubing to overcome the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a quick connection tool for tubing strings. The inverted conical mandrel structure and the expansion sleeve structure work together to enable the invention to quickly and directly connect and lock the casing. This changes the traditional method of connecting the circulation head and the casing threaded connection, greatly improves the speed of installing wellhead tools, enhances the reliability of on-site well control safety, and ensures on-site well control safety.

[0006] The objective of this invention is achieved as follows: a quick-connect tool for tubing includes an inverted conical mandrel structure with an axially penetrating central hole. The mandrel structure has an inverted conical portion whose outer diameter gradually decreases from a first end to a second end. The mandrel structure is slidably fitted into an expansion sleeve structure. The first end of the expansion sleeve structure has multiple conical flaps that can radially expand and contract under the action of the inverted conical portion. A slip plate is detachably connected to the outer wall of each conical flap, and the slip plate can fit snugly against the inner wall of the sleeve. The second end of the inverted conical mandrel structure is fitted with a threaded thrust portion, which is used to drive the inverted conical mandrel structure to move.

[0007] In a preferred embodiment of the present invention, a safety protection structure is provided on the outside of the expansion and contraction sleeve structure. The safety protection structure includes an axially movable telescopic protective sleeve. The inner wall of the telescopic protective sleeve and the outer wall of the expansion and contraction sleeve structure are spaced apart. A locking tongue that can expand and contract radially is provided at the first end of the telescopic protective sleeve. The locking tongue can contract radially to lock the outer wall of the sleeve.

[0008] In a preferred embodiment of the present invention, the threaded thrust portion includes a thrust nut and two semi-circular thrust sleeves, the two semi-circular thrust sleeves being snapped together at the second end of the expansion sleeve structure; the inner walls of the two semi-circular thrust sleeves are provided with concave annular grooves, the first end of the thrust nut being rotatable and slidably fitted within the concave annular grooves; the telescopic protective sleeve being slidably fitted onto the outer side of the two semi-circular thrust sleeves.

[0009] In a preferred embodiment of the present invention, a spring retaining ring is fitted at the first end of the two semi-annular thrust sleeves, and a first step portion with an increased outer diameter is provided at the second end of the two semi-annular thrust sleeves. A thrust sleeve groove is formed between the spring retaining ring and the first step portion. A limiting screw plug is slidably fitted in the thrust sleeve groove. A compression spring is provided between the spring retaining ring and the limiting screw plug. The second end of the telescopic protective sleeve is fitted on the limiting screw plug.

[0010] In a preferred embodiment of the present invention, a second step portion with a decreasing diameter is provided inside the telescopic protective sleeve, and the second step portion can abut against the end face of the second end of the two semi-annular thrust sleeves.

[0011] In a preferred embodiment of the present invention, the telescopic protective sleeve is provided with a latch mounting hole, and the latch is slidably disposed in the latch mounting hole; an annular groove is provided on the outer wall of each latch, and an annular spring is disposed in the annular groove.

[0012] In a preferred embodiment of the present invention, the first end of the inverted conical mandrel structure is connected to a guide seal.

[0013] In a preferred embodiment of the present invention, the guide sealing part includes a guide head that is sealed to the first end of the inverted conical mandrel structure, and a guide conical surface is provided on the outer wall of the end of the guide head away from the inverted conical part.

[0014] In a preferred embodiment of the present invention, the guide sealing part further includes a sealing cup structure, which is disposed between the inverted cone part and the guide cone surface, and the outer wall of the sealing cup structure can seal against the inner wall of the sleeve.

[0015] In a preferred embodiment of the present invention, a connecting rod is provided at the second end of the inverted conical mandrel structure, and a tapered threaded hole is provided in the connecting rod, the tapered threaded hole being configured to communicate with the central hole.

[0016] As described above, the quick-connect tool for tubing of the present invention has the following beneficial effects:

[0017] This invention relates to a quick-connect tubing tool, a well control tool used in tailpipe and screen pipe operations. The inverted conical mandrel structure and the expansion sleeve structure work together to enable a quick, direct-insertion connection and locking of the casing, changing the traditional threaded connection method between the circulation head and the casing. The threaded thrust section solves the tool jamming problem. This invention is applicable to casings of various standard sizes and has a large axial load-bearing capacity. The slip plate of the expansion sleeve structure fits tightly against the inner wall of the casing, generating sufficient axial friction to achieve a tight connection. The safety protection structure provides protection; the locking tongue of the telescopic protective sleeve locks the casing from the outside, preventing the casing from sliding off when the slip plate of the expansion sleeve structure fails, effectively solving the problem of casing falling off due to failure. This invention greatly improves the speed of wellhead tool installation, enhances the reliability of on-site well control safety, and ensures on-site well control safety. This invention has a simple structure, is easy to operate, requires no special tools, and can be quickly connected to the lower casing. When not in use, it can be placed directly in a rat hole or on a ramp, without occupying well site or drilling platform space. Attached Figure Description

[0018] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0019] in:

[0020] Figure 1 : This is a schematic diagram of the non-working state of the quick connection tool for the tubing column of the present invention.

[0021] Figure 2 : This is a schematic diagram of the working state of the quick connection tool for the tubing column of the present invention.

[0022] Figure 3 :for Figure 1 Sectional view of AA.

[0023] Figure 4 :for Figure 2 CC section view.

[0024] Figure 5 :for Figure 1 BB cross-sectional view.

[0025] In the picture:

[0026] 1. Inverted conical mandrel structure; 10. Center hole; 11. Inverted conical part;

[0027] 2. Expansion / contraction sleeve structure; 21. Conical valve body; 22. Slip plate;

[0028] 3. Threaded thrust section; 31. Thrust nut; 32. Semi-circular thrust sleeve; 33. Inner concave annular groove; 34. Spring retaining ring; 35. First step section;

[0029] 4. Safety protection structure; 41. Telescopic protective sleeve; 42. Locking tongue; 43. Limiting screw; 44. Compression spring; 45. Second step; 46. Ring spring;

[0030] 5. Guide sealing part; 51. Guide head; 511. Guide cone surface; 52. Sealing cup structure;

[0031] 6. Connecting rod; 60. Tapered threaded hole;

[0032] 7. Sleeve. Detailed Implementation

[0033] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0034] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, all of which should be considered within the scope of the invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal communication between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figures 1 to 5As shown, the present invention provides a quick connection tool for tubing, including an inverted conical mandrel structure 1, an axially penetrating central hole 10 on the inverted conical mandrel structure 1, an inverted conical portion 11 with an outer diameter that gradually narrows from a first end to a second end on the inverted conical mandrel structure 1, the inverted conical mandrel structure 1 being slidably fitted into an expansion and contraction sleeve structure 2, the first end of the expansion and contraction sleeve structure 2 being provided with a plurality of conical flaps 21 that can expand and contract radially under the action of the inverted conical portion, in a specific embodiment of the present invention, the conical flaps 21 having eight flaps; a slip plate 22 is detachably connected to the outer wall of each conical flap, the slip plate 22 being able to fit and lock against the inner wall of the sleeve 7; a threaded thrust portion 3 is fitted onto the second end of the inverted conical mandrel structure 1, the threaded thrust portion 3 being used to push the inverted conical mandrel structure 1 to move.

[0037] The internal clamping structure, namely the inverted conical mandrel structure 1 and the expansion sleeve structure 2, can be directly inserted into the sleeve, such as... Figure 2 As shown, during the upward lifting of the inverted conical mandrel structure 1, the conical flap 21 is radially expanded, causing the slip plate 22 on the outer side of the conical flap 21 to fit and lock against the inner wall of the casing, thus achieving locking. Therefore, this invention applies a quick-insertion connection locking method, changing the traditional threaded connection method between the circulation head and the casing. Compared with conventional well control tools, using this invention greatly improves the speed of wellhead tool installation and enhances the reliability of on-site well control safety.

[0038] The quick-connect tool for the tubing string of this invention is a well control tool used in the installation of tailpipes and screen pipes. The inverted conical mandrel structure and the expansion sleeve structure work together to enable a quick, direct-insertion connection and locking of the casing, changing the traditional threaded connection method between the circulation head and the casing. The threaded thrust section solves the problem of tool jamming. This invention is applicable to casings of various standard sizes and has a large axial load-bearing capacity. This invention greatly improves the speed of installing wellhead tools, enhances the reliability of on-site well control safety, and ensures on-site well control safety. This invention has a simple structure, is easy to operate, requires no special tools, and can quickly connect to the lower casing. When not in use, it can be placed directly in a rat hole or on a ramp, without occupying space on the well site or drilling platform.

[0039] Furthermore, such as Figure 1 , Figure 2 As shown, a safety protection structure 4 is fitted around the expansion and contraction sleeve structure 2. The safety protection structure 4 includes an axially movable telescopic protective sleeve 41. The inner wall of the telescopic protective sleeve 41 and the outer wall of the expansion and contraction sleeve structure 2 are spaced apart, thus forming a receiving annulus for the sleeve. During the direct insertion operation, the end of the sleeve 7 is fitted into this receiving annulus. A radially expanding and contracting locking tongue 42 is provided at the first end of the telescopic protective sleeve 41. The locking tongue 42 can radially contract to lock the outer wall of the sleeve 7. In the initial state of the safety protection structure 4, the locking tongue 42 is in the following state: Figure 3 As shown; in the working state of the safety protection structure 4, the locking tongue 42 retracts radially, as... Figure 4 As shown.

[0040] The slip plate 22 of the expansion and contraction sleeve structure 2 (with a toothed outer wall) fits tightly against the inner wall of the sleeve, generating sufficient axial friction to achieve the purpose of tightly connecting the expansion and contraction sleeve structure 2 to the sleeve; the safety protection structure 4 plays a safety protection role, and the locking tongue 42 of the telescopic protective sleeve 41 locks the sleeve from the outside, so that the sleeve will not slide off when the slip plate 22 of the expansion and contraction sleeve structure 2 fails, effectively solving the problem of failure and falling off.

[0041] Furthermore, such as Figure 1 , Figure 2 As shown, the threaded thrust part 3 includes a thrust nut 31 and two semi-circular thrust sleeves 32. The two semi-circular thrust sleeves 32 are snapped together and connected to the second end of the expansion sleeve structure 2. The inner walls of the two semi-circular thrust sleeves 32 are provided with concave annular grooves 33. The first end of the thrust nut 31 is rotatable and slidably fitted in the concave annular grooves 33. The telescopic protective sleeve 41 is slidably fitted on the outside of the two semi-circular thrust sleeves.

[0042] Furthermore, such as Figure 1 , Figure 2 As shown, a spring retaining ring 34 is fitted onto the first end of the two semi-circular thrust sleeves 32, and a first step portion 35 with an increased outer diameter is provided at the second end of the two semi-circular thrust sleeves 32. A thrust sleeve groove is formed between the spring retaining ring 34 and the first step portion 35. A limiting screw plug 43 is slidably fitted inside the thrust sleeve groove. A compression spring 44 is provided between the spring retaining ring 34 and the limiting screw plug 43. The second end of the telescopic protective sleeve 41 is fitted onto the limiting screw plug 43.

[0043] Furthermore, such as Figure 1 , Figure 2 As shown, the telescopic protective sleeve 41 is provided with a second step portion 45 with a decreasing diameter. The second step portion 45 can abut against the end face of the second end of the two semi-annular thrust sleeves 32 to form an axial limit of the telescopic protective sleeve 41.

[0044] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the telescopic protective sleeve 41 is provided with a latch mounting hole, and the latch 42 is slidably disposed within the latch mounting hole; an annular groove is provided on the outer wall of each latch 42, and an annular spring 46 is disposed within the annular groove. In this embodiment, each latch 42 is provided with a latch sliding groove hole, and a latch rod passing through the latch mounting hole is connected to the telescopic protective sleeve 41. The latch sliding groove hole can be slidably fitted onto the latch rod to prevent the latch from falling off.

[0045] Furthermore, such as Figure 1 , Figure 2 As shown, the first end of the inverted conical mandrel structure 1 is connected to the guide seal part 5.

[0046] Furthermore, such as Figure 1 , Figure 2 As shown, the guide sealing part 5 includes a guide head 51 that is sealed and connected to the first end of the inverted conical mandrel structure 1, and a guide cone surface 511 is provided on the outer wall of the end of the guide head 51 away from the inverted cone part.

[0047] Furthermore, such as Figure 1 , Figure 2 As shown, the guide sealing part 5 also includes a sealing cup structure 52, which is disposed between the inverted cone part 11 and the guide cone surface 511. The outer wall of the sealing cup structure 52 can seal against the inner wall of the sleeve. The sealing cup structure 52 has good pressure resistance and effectively solves the problem of sealing the inner wall of the sleeve.

[0048] Furthermore, such as Figure 1 , Figure 2 As shown, a connecting rod 6 is provided at the second end of the inverted conical mandrel structure 1, and a tapered threaded hole 60 is provided inside the connecting rod 6. The tapered threaded hole 60 is connected to the center hole 10.

[0049] The working process of a specific embodiment of the quick-connect tool for tubing of the present invention is as follows:

[0050] First, connect the quick-connect tool for the tubing string to the blowout preventer drill rod (existing technology) and place it on the drill rig (existing technology); when overflow occurs, replace the drill rod hanger (existing technology), lift the connected blowout preventer drill rod individually, and quickly insert the quick-connect tool for the tubing string into the casing 7; then manually rotate the thrust nut 31 one turn to push the inverted conical mandrel structure 1 toward its second end ( Figure 1 (Move from center to left)

[0051] The inverted cone mandrel structure 1 radially expands the conical flap body 21, so that the slip plate 22 on the outer side of the conical flap body 21 is tightly attached to the inner wall of the sleeve, generating sufficient axial friction force to achieve the purpose of locking the connecting sleeve.

[0052] Then lift the tubing column 100mm, observe the suspended weight, and verify whether the locking is reliable; rotate the telescopic protective sleeve 41 30°, and the spring pushes the telescopic protective sleeve 41 down until the locking tongue pops out and locks the outer wall of the sleeve, completing the safety protection and effectively preventing the sleeve from sliding off.

[0053] Raise the quick-connect tool for the tubing string, remove the drill pipe clamp, and then lower the blowout preventer drill pipe into the wellhead one by one. Quickly close the blowout preventer and the plug (existing technology) to complete the well shut-in of the inner and outer annulus.

[0054] As described above, the quick-connect tool for tubing of the present invention has the following beneficial effects:

[0055] This invention relates to a quick-connect tubing tool, a well control tool used in tailpipe and screen pipe operations. The inverted conical mandrel structure and the expansion sleeve structure work together to enable a quick, direct-insertion connection and locking of the casing, changing the traditional threaded connection method between the circulation head and the casing. The threaded thrust section solves the tool jamming problem. This invention is applicable to casings of various standard sizes and has a large axial load-bearing capacity. The slip plate of the expansion sleeve structure fits tightly against the inner wall of the casing, generating sufficient axial friction to achieve a tight connection. The safety protection structure provides protection; the locking tongue of the telescopic protective sleeve locks the casing from the outside, preventing the casing from sliding off when the slip plate of the expansion sleeve structure fails, effectively solving the problem of casing falling off due to failure. This invention greatly improves the speed of wellhead tool installation, enhances the reliability of on-site well control safety, and ensures on-site well control safety. This invention has a simple structure, is easy to operate, requires no special tools, and can be quickly connected to the lower casing. When not in use, it can be placed directly in a rat hole or on a ramp, without occupying well site or drilling platform space.

[0056] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A quick connection tool for tubing, characterized in that, The device includes an inverted conical mandrel structure with an axially penetrating central hole. The mandrel structure has an inverted conical portion whose outer diameter gradually decreases from a first end to a second end. The mandrel structure is slidably fitted into an expansion sleeve structure. The first end of the expansion sleeve structure has multiple conical flaps that can radially expand and contract under the action of the inverted conical portion. Each conical flap has a detachably connected slip plate on its outer wall, which can fit and lock against the inner wall of the sleeve. The second end of the inverted conical mandrel structure is fitted with a threaded thrust portion for driving the movement of the mandrel structure. The expansion and contraction sleeve structure is fitted with a safety protection structure, which includes an axially movable telescopic protective sleeve. The inner wall of the telescopic protective sleeve and the outer wall of the expansion and contraction sleeve structure are spaced apart. The first end of the telescopic protective sleeve is provided with a locking tongue that can expand and contract radially. The locking tongue can retract radially to lock the outer wall of the sleeve. The threaded thrust portion includes a thrust nut and two semi-circular thrust sleeves. The two semi-circular thrust sleeves are snapped together and connected to the second end of the expansion sleeve structure. The inner walls of the two semi-circular thrust sleeves are provided with concave annular grooves. The first end of the thrust nut is rotatable and slidably fitted into the concave annular grooves. The telescopic protective sleeve is slidably fitted onto the outside of the two semi-circular thrust sleeves. A spring retaining ring is fitted at the first end of each of the two semi-circular thrust sleeves, and a first step portion with an increased outer diameter is provided at the second end of each of the two semi-circular thrust sleeves. A thrust sleeve groove is formed between the spring retaining ring and the first step portion. A limiting screw plug is slidably fitted in the thrust sleeve groove. A compression spring is provided between the spring retaining ring and the limiting screw plug. The second end of the telescopic protective sleeve is fitted on the limiting screw plug.

2. The quick-connect tool for tubing as described in claim 1, characterized in that, The telescopic protective sleeve is provided with a second step portion with a decreasing diameter, which can abut against the end face of the second end of the two semi-circular thrust sleeves.

3. The quick-connect tool for tubing as described in claim 1, characterized in that, The telescopic protective sleeve is provided with a latch mounting hole, and the latch is slidably disposed in the latch mounting hole; an annular groove is provided on the outer wall of each latch, and an annular spring is disposed in the annular groove.

4. The quick-connect tool for tubing as described in claim 1, characterized in that, The first end of the inverted conical mandrel structure is connected to a guide seal.

5. The quick-connect tool for tubing as described in claim 4, characterized in that, The guide sealing part includes a guide head that is sealed to the first end of the inverted conical mandrel structure, and a guide cone surface is provided on the outer wall of the end of the guide head away from the inverted conical part.

6. The quick-connect tool for tubing as described in claim 5, characterized in that, The guide sealing part also includes a sealing cup structure, which is disposed between the inverted cone part and the guide cone surface. The outer wall of the sealing cup structure can seal against the inner wall of the sleeve.

7. The quick-connect tool for tubing as described in claim 1, characterized in that, The second end of the inverted conical mandrel structure is provided with a connecting rod, and the connecting rod is provided with a tapered threaded hole, which is connected to the center hole.

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