CN213269823U

CN213269823U - Novel salvage and exempt from to bore hierarchical hoop

Info

Publication number: CN213269823U
Application number: CN202021264278.7U
Authority: CN
Inventors: 邢世奇; 李爱霞; 胡金建; 于丽
Original assignee: Dezhou Horizon Petroleum Technology Co ltd
Current assignee: Dezhou Horizon Petroleum Technology Co ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-05-25
Anticipated expiration: 2030-07-02

Abstract

The utility model provides a novel salvage and exempt from to bore hierarchical hoop mainly relates to well drilling well cementation technical field. The utility model provides a novel salvage exempts from to bore hierarchical hoop, includes coupling and seat and seals the ball, coupling lower extreme installation nipple joint, the nipple joint lower extreme installation top connection, the cover is salvaged in the nipple joint installation, salvage the installation of cover lower extreme and open the cover, salvage the outside suit of cover and right the ring, top connection lower extreme installation barrel, barrel lower extreme installation center tube. The utility model has the advantages of reasonable design, the packing element expands seals pressure stability, and pressure stability is opened in the circulation hole, and pressure stability is closed in the circulation hole, and all annexs all are provided with in addition and prevent changeing the function, and the annex adopts the mode of salvaging, and it is simple to salvage, exempts from to bore the stopper, can protective case and cement sheath, has improved protective case and cement sheath life, has practiced thrift use cost.

Description

Novel salvage and exempt from to bore hierarchical hoop

Technical Field

The utility model mainly relates to a well cementation technical field that drills specifically is a novel salvage exempts from to bore hierarchical hoop.

Background

The construction operation of lowering a casing into a well and injecting cement into an annular space between the well and the casing is called well cementation, the well cementation is important operation in a well drilling process, at least two times of well cementation are generally carried out in the well drilling operation, up to 4-5 times of well cementation are carried out, the uppermost well cementation is surface casing well cementation and plays the roles of a slurry passage and an oil gas door, and a blowout preventer is arranged on the surface casing to prevent well blowout before next drilling.

At present, the defects that a closing sleeve is easy to damage by drilling and a part of a well left after the drilling and the plugging is irregular in drift diameter and the like exist in the conventional graded well cementation technology in the process of drilling and plugging, so that the sand prevention of open hole gravel filling of a horizontal well fails, and inconvenience is brought to the construction of well drilling and cementing.

SUMMERY OF THE UTILITY MODEL

For solving prior art's is not enough, the utility model provides a novel salvage and exempt from to bore graduated collar, the utility model has the advantages of reasonable design, packing element expands and seals the pressure stability, and the pressure stability is opened in the circulation hole, and the circulation hole is closed the pressure stability, and all annexs all are provided with in addition and prevent changeing the function, and the annex adopts the mode of salvaging, salvages simply, exempts from to bore the stopper, can protective case and cement ring, has improved protective case and cement ring life, has practiced thrift use cost.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a novel salvage exempts from to bore hierarchical hoop, includes coupling and seat and seals the ball, coupling lower extreme installation nipple joint, the nipple joint lower extreme installation top connection, the cover is salvaged in the nipple joint installation, salvage the installation of cover lower extreme and open the cover, salvage the outside suit of cover and right the ring, top connection lower extreme installation barrel, barrel lower extreme installation center tube, cover and holding ring are closed to the suit in the barrel, the barrel with close installation guide screw between the cover, installation jump ring in the barrel, cap and end cap are pressed to the outside suit of barrel, the end cap with press to be connected through the shear pin between the cap, open cover bottom internally mounted piston, coupling under center tube lower extreme installation packing element, outside suit overflow joint, check valve, packing element and the packing element lower extreme of center tube, packing element lower extreme installation lower clutch.

Furthermore, taper threads are formed at the upper end of the coupling.

Further, nipple and coupling, top connection and nipple, barrel and top connection, center tube and barrel, packing element lower coupling and center tube, overflow joint and pressure cap, bottom connection and packing element, packing element and packing element lower joint all pass through threaded connection.

Furthermore, the lower end of the lower connector is provided with taper threads.

Contrast prior art, the beneficial effects of the utility model are that:

the utility model has the advantages of reasonable design, the packing element expands seals pressure stability, and pressure stability is opened in the circulation hole, and pressure stability is closed in the circulation hole, and all annexs all are provided with in addition and prevent changeing the function, and the annex adopts the mode of salvaging, and it is simple to salvage, exempts from to bore the stopper, can protective case and cement sheath, has improved protective case and cement sheath life, has practiced thrift use cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a diagram of the matched closing rubber plug of the utility model;

FIG. 3 is a drawing of the fishing spear matched with the utility model;

reference numerals shown in the drawings: 1. a coupling; 2. a short section; 3. salvaging the sleeve; 4. an upper joint; 5. a righting ring; 6. a barrel; 7. closing the sleeve; 8. opening the sleeve; 9. a plug; 10. a piston; 11. pressing the cap; 12. a clamp spring; 13. a positioning ring; 14. a central tube; 15. an overcurrent connection; 16. a one-way valve; 17. a rubber cylinder; 18. a lower joint of the rubber cylinder; 19. a rubber cylinder lower coupling; 20. a lower joint; 21. and (5) seating and sealing the ball.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

As shown in figures 1-3, the novel salvage drilling-free grading hoop comprises a coupling 1 and a seat sealing ball 21, the coupling 1 comprises a coupling 1, a nipple 2 is arranged at the lower end of the coupling 1, an upper joint 4 is arranged at the lower end of the nipple 2, a salvage sleeve 3 is arranged in the nipple 2, an opening sleeve 8 is arranged at the lower end of the salvage sleeve 3, a centralizing ring 5 is sleeved outside the salvage sleeve 8, a barrel body 6 is arranged at the lower end of the upper joint 4, a central pipe 14 is arranged at the lower end of the barrel body 6, a closing sleeve 7 and a positioning ring 13 are sleeved in the barrel body 6, a guide screw is arranged between the barrel body 6 and the closing sleeve 7, a snap spring 12 is arranged in the barrel body 6, a pressing cap 11 and a plug 9 are sleeved outside the barrel body 6, the plug 9 is connected with the pressing cap 11 through a shear pin, a piston 10 is arranged inside the bottom end of, an overflow joint 15, a one-way valve 16, a rubber cylinder 17 and a rubber cylinder lower joint 18 are sleeved outside the central tube 14, and a lower joint 20 is installed at the lower end of the rubber cylinder 17.

Specifically, the upper end of the coupling 1 is provided with a taper thread. Taper threads are formed in the upper end of the coupling 1, so that the coupling 1 and the construction casing can be conveniently connected in a pipe string.

Specifically, the nipple 2 and the coupling 1, the upper joint 4 and the nipple 2, the barrel 6 and the upper joint 4, the central pipe 14 and the barrel 6, the lower coupling 19 and the central pipe 14 of the rubber sleeve, the overflow joint 15 and the press cap 11, the lower joint 20 and the rubber sleeve 17, and the rubber sleeve 17 and the lower joint 18 of the rubber sleeve are all connected through threads. Through threaded connection, the installation and the dismantlement between each part of being convenient for bring the convenience for the operation.

Specifically, the lower end of the lower joint 20 is provided with a taper thread. Taper threads are formed at the lower end of the lower joint 20, so that the lower joint and the lower joint 20 can be conveniently connected with a construction sleeve in a pipe string.

Example (b):

when the device is used, firstly, a casing pipe is put in, the salvaging drilling-free grading hoop is connected to the design position of the pipe string, the casing pipe and the salvaging drilling-free grading hoop are put in place, and construction is carried out according to the design requirement; putting a seat ball at the wellhead for pressurization, building pressure in the pipe, transmitting the pressure to the opening sleeve 8 through the piston 10, transmitting the pressure to the closing sleeve 7 through the opening sleeve 8, shearing a shear pin of the closing sleeve 7 through pressurization, descending the closing sleeve 7 to expose a circulation hole, and performing expansion rubber sleeve 17 operation through the circulation hole and a overflowing hole; after the rubber sleeve 17 is expanded and sealed, the pressure in the pipe is kept, the pressure is transmitted to the plug 9 and the pressing cap 11, shear nails between the plug 9 and the pressing cap 11 are sheared in a pressurizing mode, well cementation operation is started, after well cementation is finished, a closing plug is thrown to the fishing sleeve 3, shear nails at the positioning ring 13 are sheared in a pressurizing mode, the fishing sleeve 3, the closing plug, the opening sleeve 8 and the closing sleeve 7 are pushed backwards to move downwards together, a circulation hole is closed, and the clamp spring 12 is just clamped in a clamp spring groove of the closing sleeve 7 to be positioned; the fishing spear is lowered, the fishing spear is clamped in the fishing sleeve 3 after being in place, and the drill rod is lifted up to fish out the internal accessories; the utility model has the advantages of reasonable design, the packing element expands seals pressure stability, and pressure stability is opened in the circulation hole, and pressure stability is closed in the circulation hole, and all annexs all are provided with in addition and prevent changeing the function, and the annex adopts the mode of salvaging, and it is simple to salvage, exempts from to bore the stopper, can protective case and cement sheath, has improved protective case and cement sheath life, has practiced thrift use cost.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a novel salvage exempts from to bore hierarchical hoop, includes coupling (1) and seat and seals ball (21), its characterized in that: the coupling comprises a coupling (1), a nipple (2) is installed at the lower end of the coupling (1), an upper joint (4) is installed at the lower end of the nipple (2), a salvaging sleeve (3) is installed in the nipple (2), a sleeve (8) is installed at the lower end of the salvaging sleeve (3), a centralizing ring (5) is sleeved outside the salvaging sleeve (3), a barrel (6) is installed at the lower end of the upper joint (4), a central pipe (14) is installed at the lower end of the barrel (6), a closing sleeve (7) and a positioning ring (13) are sleeved in the barrel (6), a guide screw is installed between the barrel (6) and the closing sleeve (7), a snap spring (12) is installed in the barrel (6), a pressing cap (11) and a plug (9) are sleeved outside the barrel (6), the plug (9) and the pressing cap (11) are connected through a shear pin, a piston (10) is installed inside the bottom, the lower end of the central tube (14) is provided with a lower rubber sleeve coupling (19), the outer part of the central tube (14) is sleeved with an overflowing joint (15), a one-way valve (16), a rubber sleeve (17) and a lower rubber sleeve joint (18), and the lower end of the rubber sleeve (17) is provided with a lower joint (20).

2. The novel salvage drill-free grading collar according to claim 1, characterized in that: the upper end of the coupling (1) is provided with taper threads.

3. The novel salvage drill-free grading collar according to claim 1, characterized in that: nipple joint (2) and coupling (1), top connection (4) and nipple joint (2), barrel (6) and top connection (4), center tube (14) and barrel (6), packing element lower coupling (19) and center tube (14), overflow joint (15) and pressure cap (11), lower clutch (20) and packing element (17), all through threaded connection between packing element (17) and packing element lower clutch (18).

4. The novel salvage drill-free grading collar according to claim 1, characterized in that: the lower end of the lower joint (20) is provided with taper threads.