CN215332752U

CN215332752U - Drill rod cement head with good sealing performance

Info

Publication number: CN215332752U
Application number: CN202121628092.XU
Authority: CN
Inventors: 师方慧
Original assignee: Fizzer Petroleum Equipment Liaoning Co ltd
Current assignee: Fizzer Petroleum Equipment Liaoning Co ltd
Priority date: 2021-07-18
Filing date: 2021-07-18
Publication date: 2021-12-28
Anticipated expiration: 2031-07-18

Abstract

The utility model belongs to the technical field of cement heads, and particularly relates to a drill rod cement head with good sealing performance, which comprises a cement head main body, wherein the lower end of the cement head main body is fixedly connected with a connecting pipe, the lower end of the cement head main body is fixedly connected with an output pipe, four clamping sleeves which are uniformly distributed are fixedly sleeved in the connecting pipe, a pipeline is connected in the connecting pipe in a sliding manner, a fixed rod is connected in the clamping sleeve in a sliding manner, a spring is arranged on the outer side of the fixed rod, a limiting ring is fixedly connected on the outer side of the fixed rod, and a connecting groove is formed in the pipeline. The structure of the internal thread pipe, the external thread pipe, the sealing plug and the like is additionally arranged in the connecting pipe, so that the sealing plug can be driven to move through the thread fit between the internal thread pipe and the external thread pipe, the sealing plug is inserted into the pipeline, and the leakage caused by the movement of the sealing plug due to the overlarge internal pressure of the pipeline can be prevented.

Description

Drill rod cement head with good sealing performance

Technical Field

The utility model relates to the technical field of cement heads, in particular to a drill rod cement head with good sealing performance.

Background

The cementing head is an indispensable wellhead tool in well cementation construction, and the pipeline joint on the conventional well cementation cementing head is fixed on a cementing head body by simple welding at present, and the pressure grade is usually 35MPa and 50 MPa. With the increasing of the difficulty of exploration and development, deep wells, ultra-deep wells and high-density well cementation instead of clean water are increased, and high-pressure well cementation construction becomes a normal state.

When the cementing head in the prior art is used, the joint of the cementing head and the pipeline is easy to leak due to the overlarge pressure inside the pipeline, so that the pressure is lost and cannot be used, and the cementing head is inconvenient to disassemble and overhaul during daily overhaul, so that the equipment is inconvenient to use. Accordingly, there is a need for improvements in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drill rod cementing head with good sealing performance, and solves the problems of poor sealing performance and inconvenience in mounting and dismounting.

In order to achieve the purpose, the utility model provides the following technical scheme: a drill rod cementing head with good sealing performance comprises a cementing head main body, wherein a connecting pipe is fixedly connected to the lower end of the cementing head main body, an output pipe is fixedly connected to the lower end of the cementing head main body, four clamping sleeves which are uniformly distributed are fixedly sleeved inside the connecting pipe, a pipeline is slidably connected inside the connecting pipe, a fixed rod is slidably connected inside the clamping sleeves, a spring is arranged outside the fixed rod, a limiting ring is fixedly connected outside the fixed rod, a connecting groove is formed in the pipeline, the fixed rod is slidably connected with the connecting groove, a first bearing is fixedly sleeved outside the output pipe, a first external threaded pipe is fixedly sleeved outside the first bearing, an internal threaded pipe is connected outside the external threaded pipe through threads, a sealing plug is fixedly connected to the lower end of the internal threaded pipe, and a first bevel gear is fixedly connected outside the external threaded pipe, the inside of connecting pipe is fixed to be cup jointed bearing two, the inside fixed cover of bearing two has been cup jointed the minor axis, the one end fixedly connected with bevel gear two of minor axis, the upper end fixedly connected with square board of internal thread pipe, external thread pipe with the cement head main part contact.

Preferably, the sealing plug is slidably connected to the output pipe, and the sealing plug is in contact with the pipeline.

Preferably, one end of the spring is fixedly connected with the limiting ring, the other end of the spring is fixedly connected with the clamping sleeve, and the clamping sleeve is in contact with the pipeline.

Preferably, one end of the fixing rod is fixedly connected with a limiting plate, and the limiting plate is in contact with the clamping sleeve.

Preferably, the inside of connecting pipe is square, square board with the connecting pipe sliding connection, square board with the external screw thread pipe contact.

Preferably, the first bevel gear is meshed with the second bevel gear, and the other end of the short shaft is fixedly connected with a hand wheel.

Compared with the prior art, the utility model has the following beneficial effects:

1. the structure of the internal thread pipe, the external thread pipe, the sealing plug and the like is additionally arranged in the connecting pipe, so that the sealing plug can be driven to move through the thread fit between the internal thread pipe and the external thread pipe, the sealing plug is inserted into the pipeline, and the leakage caused by the movement of the sealing plug due to the overlarge internal pressure of the pipeline can be prevented.

2. The connecting pipe is provided with the clamping sleeve, the spring, the fixed rod and other structures, the fixed rod and the connecting groove on the pipeline can be matched and fixed during installation, and the fixed rod can be removed only by moving out of the connecting groove during disassembly, so that the cement head can be maintained more simply.

Drawings

FIG. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is an installation view of the cementing head body of the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;

fig. 4 is an enlarged view of the structure of the part B of fig. 2 according to the present invention.

In the figure: 1. a cementing head main body; 2. a connecting pipe; 3. an output pipe; 4. installing a jacket; 5. a pipeline; 6. fixing the rod; 7. a spring; 8. a limiting ring; 9. a limiting plate; 10. connecting grooves; 11. a first bearing; 12. an externally threaded tube; 13. an internally threaded tube; 14. a sealing plug; 15. a first bevel gear; 16. a square plate; 17. a second bearing; 18. a minor axis; 19. a second bevel gear; 20. a handwheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a drill rod cementing head with good sealing performance comprises a cementing head main body 1, a connecting pipe 2 is fixedly connected to the lower end of the cementing head main body 1, an output pipe 3 is fixedly connected to the lower end of the cementing head main body 1, four clamping sleeves 4 which are uniformly distributed are fixedly sleeved inside the connecting pipe 2, a pipeline 5 is slidably connected inside the connecting pipe 2, a fixed rod 6 is slidably connected inside the clamping sleeve 4, a spring 7 is arranged outside the fixed rod 6, a limiting ring 8 is fixedly connected outside the fixed rod 6, a connecting groove 10 is arranged on the pipeline 5, the fixed rod 6 is slidably connected with the connecting groove 10, a bearing 11 is fixedly sleeved outside the output pipe 3, an external threaded pipe 12 is fixedly sleeved outside the bearing 11, an internal threaded pipe 13 is connected outside the external threaded pipe 12 through threads, and a sealing plug 14 is fixedly connected to the lower end of the internal threaded pipe 13, the outer side of the external threaded pipe 12 is fixedly connected with a first bevel gear 15, the inside of the connecting pipe 2 is fixedly sleeved with a second bearing 17, the inside of the second bearing 17 is fixedly sleeved with a short shaft 18, one end of the short shaft 18 is fixedly connected with a second bevel gear 19, the upper end of the internal threaded pipe 13 is fixedly connected with a square plate 16, and the external threaded pipe 12 is in contact with the cement head main body 1.

Referring to fig. 4, the sealing plug 14 is slidably connected to the output pipe 3, the sealing plug 14 contacts the pipeline 5, and the sealing plug 14 is made of rubber material and can be elastically deformed.

Referring to fig. 3, one end of the spring 7 is fixedly connected to the limiting ring 8, the other end of the spring 7 is fixedly connected to the clamping sleeve 4, the clamping sleeve 4 contacts the pipeline 5, and the spring 7 can drive the fixing rod 6 to automatically reset through elasticity.

Referring to fig. 3, one end of the fixing rod 6 is fixedly connected with a limiting plate 9, the limiting plate 9 is in contact with the clamping sleeve 4, and the limiting plate 9 can limit the fixing rod 6.

Referring to fig. 4, the inside of the connection pipe 2 is square, the square plate 16 is slidably connected to the connection pipe 2, the square plate 16 contacts the external threaded pipe 12, and the square plate 16 can limit the internal threaded pipe 13.

Referring to fig. 4, the first bevel gear 15 is engaged with the second bevel gear 19, and the other end of the short shaft 18 is fixedly connected with a hand wheel 20, and the hand wheel 20 can drive the short shaft 18 to rotate.

The specific implementation process of the utility model is as follows: when in maintenance, the limiting plate 9 is pulled, the limiting plate 9 drives the fixed rod 6 to move, the spring 7 is compressed, when the fixed rod 6 moves out of the connecting groove 10, the cementing head main body 1 can be detached for maintenance, after maintenance, the connecting pipe 2 is sleeved outside the pipeline 5, then the limiting plate 9 is loosened, the spring 7 is reset, the spring 7 pushes the limiting ring 8 to drive the fixed rod 6 to be inserted into the connecting groove 10 through elasticity, so that the cementing head main body 1 can be installed, after the installation, the short shaft 18 is driven to rotate through the hand wheel 20, the short shaft 18 drives the bevel gear one 15 to rotate through the bevel gear two 19, the bevel gear one 15 drives the external threaded pipe 12 to rotate, simultaneously, the external threaded pipe 12 drives the sealing plug 14 to move through the thread fit between the internal threaded pipe 13, and the sealing plug 14 is inserted into a gap between the output pipe 3 and the pipeline 5, and the displacement of the sealing plug 14 in a high pressure state can be prevented by the continuous support of the internally threaded tube 13.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a drilling rod cementing head that leakproofness is good, includes cementing head main part (1), its characterized in that: the lower end of the cement head main body (1) is fixedly connected with a connecting pipe (2), the lower end of the cement head main body (1) is fixedly connected with an output pipe (3), the inside of the connecting pipe (2) is fixedly sleeved with four uniformly distributed clamping sleeves (4), the inside of the connecting pipe (2) is connected with a pipeline (5) in a sliding manner, the inside of each clamping sleeve (4) is connected with a fixed rod (6) in a sliding manner, the outside of each fixed rod (6) is provided with a spring (7), the outside of each fixed rod (6) is fixedly connected with a limiting ring (8), the pipeline (5) is provided with a connecting groove (10), the fixed rods (6) are connected with the connecting grooves (10) in a sliding manner, the outside of the output pipe (3) is fixedly sleeved with a bearing I (11), the outside of the bearing I (11) is fixedly sleeved with an external threaded pipe (12), the outside of the external threaded pipe (12) is connected with an internal threaded pipe (13) through threads, the lower extreme fixedly connected with sealing plug (14) of internal thread pipe (13), the outside fixedly connected with bevel gear (15) of external thread pipe (12), the inside fixed bearing two (17) of having cup jointed of connecting pipe (2), the fixed short axle (18) of having cup jointed in inside of bearing two (17), the one end fixedly connected with bevel gear two (19) of short axle (18), the square board (16) of upper end fixedly connected with of internal thread pipe (13), external thread pipe (12) with cement head main part (1) contact.

2. The drill pipe cementing head with good sealing performance as claimed in claim 1, wherein: the sealing plug (14) is connected with the output pipe (3) in a sliding mode, and the sealing plug (14) is in contact with the pipeline (5).

3. The drill pipe cementing head with good sealing performance as claimed in claim 1, wherein: one end of the spring (7) is fixedly connected with the limiting ring (8), the other end of the spring (7) is fixedly connected with the clamping sleeve (4), and the clamping sleeve (4) is in contact with the pipeline (5).

4. The drill pipe cementing head with good sealing performance as claimed in claim 1, wherein: one end of the fixing rod (6) is fixedly connected with a limiting plate (9), and the limiting plate (9) is in contact with the clamping sleeve (4).

5. The drill pipe cementing head with good sealing performance as claimed in claim 1, wherein: the inside of connecting pipe (2) is square, square board (16) with connecting pipe (2) sliding connection, square board (16) with external screw thread pipe (12) contact.

6. The drill pipe cementing head with good sealing performance as claimed in claim 1, wherein: the first bevel gear (15) is meshed with the second bevel gear (19), and the other end of the short shaft (18) is fixedly connected with a hand wheel (20).