CN118128443A - Coiled tubing anti-dropping pipe clamp - Google Patents

Abstract

The present invention relates to the technical field of slips used in continuous oil pipes in oilfield drilling and well repair operations. It is a continuous oil pipe anti-drop pipe clamp, which includes a pipe clamp body, a left semi-conical slip, a right semi-conical slip, a pipe clamp locking block and a locking block bolt. The pipe clamp body is cylindrical, and pipe clamp handles are respectively fixed on the left and right sides of the pipe clamp body. The interior of the pipe clamp body has a pipe clamp heart cavity that passes through from top to bottom. The front side of the pipe clamp body is provided with a pipe clamp inlet that opens forward, and the rear end of the pipe clamp inlet is connected to the pipe clamp heart cavity. The present invention has a reasonable and compact structure and is easy to use. The slip has a large stroke in the pipe clamp body, and can effectively lock large-tonnage continuous oil pipes. By replacing slips with locking cavities of different specifications, it can be easily applied to continuous oil pipes of different sizes and outer diameters. It has strong adaptability to continuous oil pipes of different specifications, excellent load-bearing capacity, high stability and reliability of locking, and has the characteristics of simple structure, easy installation, safety and reliability.

Description

Coiled tubing anti-dropping pipe clamp

Technical Field

The invention relates to the technical field of slips used in continuous oil pipes in oil field drilling and well repairing operations, and is a continuous oil pipe anti-dropping pipe clip.

Background technique

At present, the coiled tubing used in most oil fields mainly includes four types: 1.25 inches, 1.5 inches, 1.75 inches, and 2 inches. Due to the limited operating space at the connection between the injection head and the blowout preventer box, the existing slip device used in the coiled tubing cannot be operated in a small space, and the corresponding pipe clamp is only used for the connection and disassembly operations between the connection drum and the injection head. The tensile strength cannot meet the ultimate tensile force of the coiled tubing. When the downhole is complicated or the equipment fails, the hanging weight of the coiled tubing needs to be released to the blowout preventer slip, which cannot play the role of a second line of protection. In oilfield drilling and well repair operations, the coiled tubing has a large load, and the existing slip device has a short stroke in the seat body due to its own structural reasons, and most of them are fine buckle lock teeth with limited load-bearing capacity. When lifting the slip, the slip tooth buckle has serious wear marks, and the slip often fails, causing the coiled tubing to fall into the well again. Therefore, the slip device used in the coiled tubing in the existing oilfield drilling and well repair operations has the following shortcomings in actual use: poor adaptability to coiled tubing of different specifications, limited load-bearing capacity, poor locking stability and reliability, complex structure, time-consuming and labor-intensive use, and a safety hazard of the coiled tubing falling into the well again.

Summary of the invention

The purpose of the present invention is to provide a coiled tubing anti-dropping pipe clamp, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problems of the existing slip devices used for coiled tubing in oilfield drilling and well repair operations, such as poor adaptability to coiled tubing of different specifications, limited load-bearing capacity, poor locking stability and reliability, complex structure, time-consuming and labor-intensive use, and the potential safety hazard of the coiled tubing falling into the well again.

The object of the present invention is achieved in this way: a continuous oil pipe anti-drop pipe clamp comprises a pipe clamp body, a left semi-conical slip, a right semi-conical slip, a pipe clamp locking block and a locking block bolt, the pipe clamp body is cylindrical, and pipe clamp handles are respectively fixed on the left and right sides of the pipe clamp body, and a pipe clamp heart cavity is provided inside the pipe clamp body that passes through from top to bottom, and a pipe clamp inlet opening forward is provided on the front side of the pipe clamp body, and the rear end of the pipe clamp inlet is connected with the pipe clamp heart cavity, and a left vertical groove and a right vertical groove are provided on the pipe clamp body corresponding to the left and right sides of the pipe clamp inlet, and the pipe clamp body between the left vertical groove and the pipe clamp inlet forms an inlet left plate, and the pipe clamp body between the right vertical groove and the pipe clamp inlet forms an inlet left plate. The inlet right plate, the inlet left plate and the inlet right plate are respectively provided with bolt through holes and are fixed with pipe clamp locking blocks by locking block bolts. The rear side of the pipe clamp locking block and the pipe clamp core cavity form a complete and smooth inner conical surface of the pipe clamp, and the inner conical surface of the pipe clamp is a conical surface that is larger at the top and smaller at the bottom. The outer sides of the left semi-conical slip and the right semi-conical slip are spliced to form an outer conical surface of the slip that can cooperate with the inner conical surface of the pipe clamp. The left semi-conical slip and the right semi-conical slip are mounted in the pipe clamp core cavity of the pipe clamp body through the outer conical surface of the slip and can move upward. The inner sides of the left semi-conical slip and the right semi-conical slip are spliced to form a cylindrical locking cavity, and the side walls of the locking cavity are provided with coarse tooth teeth.

The following are further optimizations and/or improvements to the above-mentioned application technical solutions:

Furthermore, the coarse tooth clamping teeth are a plurality of annular teeth, and the annular teeth are arranged at equal intervals and their cross-sectional shape forms a sawtooth shape.

Furthermore, the transverse cross-sections of the left vertical groove and the right vertical groove are in the shape of right-angle sectors.

Furthermore, a cava handle is fixed to the upper end of the left semi-conical cava and the right semi-conical cava respectively, and the cava handle includes a handle vertical section, a handle horizontal section and a handle grip, the lower end of the handle vertical section is welded and fixed to the upper end of the left semi-conical cava or the right semi-conical cava, and the upper end of the handle vertical section is connected to the handle grip through the handle horizontal section.

Furthermore, the taper of the inner conical surface of the pipe clamp is 1:12 to 1:16.

Furthermore, the width of the pipe clamp inlet is 40 mm to 60 mm.

Furthermore, the pipe clamp height dimension of the pipe clamp body is 300 mm, and the slip height dimension of the left semi-conical slip and the right semi-conical slip is 200 mm.

The invention has a reasonable and compact structure and is easy to use. The slip has a large stroke in the pipe clamp body, and can effectively lock large-tonnage continuous oil pipes. By replacing slips with locking cavities of different specifications, it can be conveniently applied to continuous oil pipes of different sizes and outer diameters. By removing the pipe clamp locking block, the invention can be conveniently mounted on the continuous oil pipe through the pipe clamp inlet. The pipe clamp inlet can prevent the taper of the pipe clamp body from being deformed. It has strong adaptability to continuous oil pipes of different specifications, excellent load-bearing capacity, high locking stability and reliability, and has the characteristics of simple structure, convenient installation, safety and reliability.

BRIEF DESCRIPTION OF THE DRAWINGS

The specific structure of the present invention is given by the following drawings and embodiments:

FIG1 is a schematic diagram of the main structure of the preferred embodiment of the present invention;

FIG2 is a schematic diagram of a top view of the structure of a preferred embodiment of the present invention;

FIG3 is a bottom view of the structure of the preferred embodiment of the present invention;

FIG. 4 is a schematic diagram of the three-dimensional structure of the best embodiment of the present invention.

Legend: 1 is the pipe clamp body, 2 is the left semi-conical slip, 3 is the right semi-conical slip, 4 is the pipe clamp locking block, 5 is the locking block bolt, 6 is the pipe clamp handle, 7 is the pipe clamp core cavity, 8 is the pipe clamp inlet, 9 is the left vertical groove, 10 is the right vertical groove, 11 is the left inlet plate, 12 is the right inlet plate, 13 is the inner cone surface of the pipe clamp, 14 is the locking cavity, 15 is the vertical section of the handle, 16 is the horizontal section of the handle, 17 is the handle, W is the width dimension, L is the pipe clamp height dimension, and H is the slip height dimension.

Detailed ways

The present invention is not limited by the following embodiments, and the specific implementation method can be determined according to the technical solution of the present invention and actual conditions. The present invention is further described below in conjunction with the embodiments and drawings.

Embodiment: As shown in Figures 1-4, the coiled tubing anti-drop pipe clamp includes a pipe clamp body 1, a left semi-conical slip 2, a right semi-conical slip 3, a pipe clamp locking block 4 and a locking block bolt 5. The pipe clamp body 1 is cylindrical, and pipe clamp handles 6 are fixed to the left and right sides of the pipe clamp body 1, respectively. The interior of the pipe clamp body 1 has a pipe clamp heart cavity 7 that passes through from top to bottom. The front side of the pipe clamp body 1 is provided with a pipe clamp inlet 8 that opens forward, and the rear end of the pipe clamp inlet 8 is connected to the pipe clamp heart cavity 7. The pipe clamp body 1 corresponding to the left and right sides of the pipe clamp inlet 8 is provided with a left vertical groove 9 and a right vertical groove 10. The pipe clamp body 1 between the left vertical groove 9 and the pipe clamp inlet 8 forms an inlet left plate 11, and the pipe clamp body 1 between the right vertical groove 10 and the pipe clamp inlet 8 forms an inlet The right plate 12, the inlet left plate 11 and the inlet right plate 12 are respectively provided with bolt through holes and are fixed with the pipe clamp locking block 4 by the locking block bolts 5. The rear side of the pipe clamp locking block 4 and the pipe clamp core cavity 7 form a complete and smooth pipe clamp inner cone surface 13. The pipe clamp inner cone surface 13 is a conical surface that is larger at the top and smaller at the bottom. The outer sides of the left semi-conical slip 2 and the right semi-conical slip 3 are spliced to form a slip outer cone surface that can cooperate with the pipe clamp inner cone surface 13. The left semi-conical slip 2 and the right semi-conical slip 3 are sleeved in the pipe clamp core cavity 7 of the pipe clamp body 1 through the slip outer cone surface and can move upward. The inner sides of the left semi-conical slip 2 and the right semi-conical slip 3 are spliced to form a cylindrical locking cavity 14, and the side walls of the locking cavity 14 are provided with coarse tooth teeth. The existing slip device has a very small up and down stroke of the slip, so it will slip when the load exceeds 10 tons. The slip of the present invention has a large stroke in the pipe clamp body 1, so it can effectively lock the large-tonnage continuous oil pipe. It has been tested that it can bear a load of more than 38 tons, which is significantly improved compared with the existing slip device. The left semi-conical slip 2 and the right semi-conical slip 3 are installed in the pipe clamp body 1 through the outer conical surface of the slip. By replacing the left semi-conical slip 2 and the right semi-conical slip 3 with locking cavities 14 of different specifications, it can be conveniently applied to continuous oil pipes of different sizes of outer diameters, and can be applied to continuous oil pipes of four specifications such as 1.25 inches, 1.5 inches, 1.75 inches, and 2 inches, achieving the effect of multi-specification applicability; the coarse tooth clamping teeth are more convenient in large-load bearing work than the fine buckles of the existing slip device. The locking ability during operation is stronger and the locking is more reliable; by removing the pipe clamp lock block 4, the present invention can be easily put on the continuous oil pipe through the pipe clamp inlet 8, and then the pipe clamp lock block 4 is installed into the pipe clamp inlet 8 and fixed by the lock block bolt 5, so that the pipe clamp body 1 can be reliably installed. On the other hand, when the deadweight load of the continuous oil pipe is large, the pipe clamp heart cavity 7 with the pipe clamp inlet 8 and the U-shaped opening shape can offset part of the stress due to its own deformation of the pipe clamp body 1, so as to prevent the pipe clamp body 1 from expanding after bearing a large load and the taper of the inner conical surface 13 of the pipe clamp from plastic deformation, thereby further solving the problem of the card card not being locked firmly; through the pipe clamp handle 6, the present invention can be conveniently lifted to the wellhead when needed, and can be removed by the pipe clamp handle 6 when not needed. Therefore, the present invention has strong adaptability to continuous oil pipes of different specifications, excellent load-bearing capacity, high stability and reliability of locking, and has the characteristics of simple structure, convenient installation, safety and reliability.

The above coiled tubing anti-dropping clamp can be further optimized and/or improved according to actual needs:

According to the needs, the coarse tooth clamping teeth are a plurality of annular teeth, and the annular teeth are arranged at equal intervals and their cross-sectional shape forms a sawtooth shape. In actual manufacturing, the tooth tips of the annular teeth can be directed obliquely upward, so that the locking ability of the coiled tubing is stronger.

As shown in Fig. 2, 3 and 4, the transverse cross-section of the left vertical groove 9 and the right vertical groove 10 is in the shape of a right angle sector. The left vertical groove 9 and the right vertical groove 10 can form a bolt installation plane, and a wrench can be placed to facilitate smooth installation, tightening or removal of the locking block bolt 5.

As shown in Fig. 1 and Fig. 4, the upper ends of the left semi-conical slip 2 and the right semi-conical slip 3 are respectively fixed with slip handles, which include a handle vertical section 15, a handle horizontal section 16 and a handle grip 17. The lower end of the handle vertical section 15 is welded and fixed to the upper end of the left semi-conical slip 2 or the right semi-conical slip 3, and the upper end of the handle vertical section 15 is connected to the handle grip 17 through the handle horizontal section 16. When the coiled tubing is lowered or moved downward, the left semi-conical slip 2 and the right semi-conical slip 3 are promptly picked up and placed into the pipe clamp inner conical surface 13 of the pipe clamp body 1 through the slip handle, so as to realize the locking of the coiled tubing. When the coiled tubing is lifted and moved upward, the left semi-conical slip 2 and the right semi-conical slip 3 move upward together with the coiled tubing. When the left semi-conical slip 2 and the right semi-conical slip 3 leave the pipe clamp inner conical surface 13 and release the locking of the coiled tubing, the slips can be promptly removed through the slip handle. Through the slip handle, the left semi-conical slip 2 and the right semi-conical slip 3 can be conveniently placed between the pipe clamp inner cone surface 13 of the pipe clamp body 1 and the outer side of the coiled tubing, or the slip can be taken out, effectively avoiding hand injuries to the operator when directly taking and placing the slip, which is safer and more reliable.

As shown in Figures 1 and 4, the taper of the inner conical surface 13 of the pipe clamp is 1:12 to 1:16. If the taper of the inner conical surface 13 of the pipe clamp is too small, it will cause self-locking. When the load is large, the left half-cone slip 2 and the right half-cone slip 3 will be stuck in the inner conical surface 13 of the pipe clamp. If the taper is too large, the lower diameter of the left half-cone slip 2 and the right half-cone slip 3 will be too small, which will affect the strength of the locking force on the continuous oil pipe, and will cause slipping due to the inability to lock or not lock firmly. After actual test comparison, the taper of the inner conical surface 13 of the pipe clamp is preferably 1:14. At this time, the taper of the left half-cone slip 2 and the right half-cone slip 3 is the most appropriate, which can not only lock the continuous oil pipe, but also will not damage the continuous oil pipe, and can also ensure that the slip can be smoothly removed after entering the pipe clamp body 1 under a large tonnage load.

As shown in Fig. 2, the width dimension W of the pipe clamp inlet 8 is 40 mm to 60 mm. In actual manufacturing, the width dimension of the pipe clamp inlet 8 needs to be slightly larger than the outer diameter of the 2-inch coiled tubing, so that 1.25-inch, 1.5-inch, 1.75-inch, and 2-inch coiled tubing can be used.

As shown in FIG1 , the pipe clamp height dimension L of the pipe clamp body 1 is 300 mm, and the slip height dimension H of the left semi-conical slip 2 and the right semi-conical slip 3 is 200 mm. The slip height dimension H of the left semi-conical slip 2 and the right semi-conical slip 3 is less than one-third of the pipe clamp height dimension L, so that the left semi-conical slip 2 and the right semi-conical slip 3 have a certain travel margin when moving in the inner conical surface 13 of the pipe clamp. When installed on the coiled tubing, the left semi-conical slip 2 and the right semi-conical slip 3 are spread open, and a part of the slip is located above the pipe clamp body 1, and a part is located in the inner conical surface 13 of the pipe clamp. The greater the deadweight load of the coiled tubing, the more the slip is located in the inner conical surface 13 of the pipe clamp.

The above description is only an example for clearly explaining the present invention, and is not intended to limit the implementation methods of the present invention. Non-essential technical features may be added or removed according to actual needs to meet the needs of different situations. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims (9)

1. The utility model provides a coiled tubing prevents falling pipe strap which characterized in that: including pipe clamp body, left side half cone slips, right side half cone slips, pipe clamp locking piece and locking piece bolt, the pipe clamp body is cylindric, the left and right sides of pipe clamp body is fixed with the pipe clamp handle respectively, the inside of pipe clamp body has the pipe clamp heart chamber that link up from top to bottom, the front side of pipe clamp body is equipped with the forward pipe clamp import of opening, the rear end and the pipe clamp heart chamber of pipe clamp import are linked together, be equipped with left vertical groove and right vertical groove on the pipe clamp body on both sides about corresponding pipe clamp import, pipe clamp body between left side vertical groove and the pipe clamp import forms the import left panel, pipe clamp body between right vertical groove and the pipe clamp import forms the import right panel, have the bolt through-hole respectively on import left panel, the import right panel and through locking piece bolt fixed mounting has the pipe clamp locking piece, the rear side of pipe clamp locking piece and the inside of pipe clamp heart chamber form complete and in the smooth pipe clamp, the conical surface of big end down in the pipe clamp, the outside amalgamation of left side half cone, right half cone and the right half cone form can form the circular cone with the inside cone of pipe clamp import, the conical surface of slip, the cavity that the half cone is equipped with the left side of the inside cone, the half cone lock, the cavity that the half cone is equipped with the conical outside of the side of the lock is equipped with the cone, the hollow.

2. The coiled tubing anti-drop cartridge of claim 1, wherein: the thick tooth latch is a plurality of annular teeth, and the annular teeth are equidistantly distributed and have saw-tooth cross-section shapes.

3. The coiled tubing anti-drop tube clamp of claim 1 or 2, wherein: the transverse sections of the left vertical groove and the right vertical groove are in a right-angle sector shape.

4. The coiled tubing anti-drop tube clamp of claim 1 or 2, wherein: the upper ends of the left half cone slip and the right half cone slip are respectively fixed with a slip handle, the slip handle comprises a handle vertical section, a handle horizontal section and a handle grip, the lower end of the handle vertical section is welded and fixed with the upper end of the left half cone slip or the right half cone slip, and the upper end of the handle vertical section is connected with the handle grip into a whole through the handle horizontal section.

5. A coiled tubing anti-drop cartridge as in claim 3, wherein: the upper ends of the left half cone slip and the right half cone slip are respectively fixed with a slip handle, the slip handle comprises a handle vertical section, a handle horizontal section and a handle grip, the lower end of the handle vertical section is welded and fixed with the upper end of the left half cone slip or the right half cone slip, and the upper end of the handle vertical section is connected with the handle grip into a whole through the handle horizontal section.

6. The coiled tubing anti-drop tube clamp of claim 1 or 2, wherein: the taper of the inner conical surface of the pipe clamp is 1:12 to 1:16; or/and, the width dimension of the pipe clamp inlet is 40 mm to 60 mm; or/and the pipe clamp height of the pipe clamp body is 300 mm, and the slip height of the left half cone slip and the right half cone slip is 200 mm.

7. A coiled tubing anti-drop cartridge as in claim 3, wherein: the taper of the inner conical surface of the pipe clamp is 1:12 to 1:16; or/and, the width dimension of the pipe clamp inlet is 40 mm to 60 mm; or/and the pipe clamp height of the pipe clamp body is 300 mm, and the slip height of the left half cone slip and the right half cone slip is 200 mm.

8. The coiled tubing anti-drop cartridge of claim 4, wherein: the taper of the inner conical surface of the pipe clamp is 1:12 to 1:16; or/and, the width dimension of the pipe clamp inlet is 40 mm to 60 mm; or/and the pipe clamp height of the pipe clamp body is 300 mm, and the slip height of the left half cone slip and the right half cone slip is 200 mm.

9. The coiled tubing anti-drop cartridge of claim 5, wherein: the taper of the inner conical surface of the pipe clamp is 1:12 to 1:16; or/and, the width dimension of the pipe clamp inlet is 40 mm to 60 mm; or/and the pipe clamp height of the pipe clamp body is 300 mm, and the slip height of the left half cone slip and the right half cone slip is 200 mm.