CN210439988U

CN210439988U - Elastic drill rod joint

Info

Publication number: CN210439988U
Application number: CN201921296221.2U
Authority: CN
Inventors: 丁义东; 卢建武
Original assignee: Wuxi Huaxin Petroleum Machine Co ltd
Current assignee: Wuxi Huaxin Petroleum Machine Co ltd
Priority date: 2019-08-10
Filing date: 2019-08-10
Publication date: 2020-05-01
Anticipated expiration: 2029-08-10

Abstract

The utility model relates to an elasticity tool joint, including respectively with two fixed male joint of drilling rod and female joint, the male joint is close to the screw thread chamber that is provided with frustum shape on the terminal surface of female joint, female joint and screw thread chamber threaded connection, and the bottom in screw thread chamber is provided with the blotter that adopts stereoplasm rubber to make, is provided with a plurality of springs between blotter and the screw thread chamber, and the both ends of spring are fixed with the bottom surface in blotter and screw thread chamber respectively, and the blotter is in the compression state this moment with the terminal surface butt of female joint and spring. The blotter is portable when this connects and receives the impact, and the blotter conducts the elasticity of spring for female joint, strengthens fixed influence to pin joint and female joint through compressing tightly threaded connection part reinforcing screw thread auto-lock nature, realizes axial shock attenuation, effective increase of service life through providing buffer space in the axial.

Description

Elastic drill rod joint

Technical Field

The utility model belongs to the technical field of the technique that connects and specifically relates to an elasticity tool joint.

Background

The drill rod used for oil drilling at present usually needs to connect a plurality of drill rods together to meet the use requirement, and the drill rod joint is a component for connecting the drill rods.

The utility model discloses a drilling rod joint with composite construction is disclosed in current utility model patent document with grant publication number CN203476233U, including male joint and female joint, the male joint comprises base pipe layer and cover the pipe layer is compound, and the female joint also has the base pipe layer and covers the pipe layer and compound and form to be equipped with the circular bead between the base pipe layer and cover the pipe layer, adopts different materials to make male joint and female joint can satisfy the corrosion-resistant and high requirement of inner wall intensity of outer wall through the base pipe layer with covering the pipe layer, has solved the too high problem of adoption single metal material price simultaneously.

The above prior art solutions have the following drawbacks: although the sheathing layer may increase the strength of the joint, axial service oscillations are still not damped. When in use, the threaded connection part is continuously subjected to rigid impact in the axial direction, and the buffering performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an elasticity tool joint can cushion and use and vibrate increase of service life.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides an elasticity tool joint, includes the male joint and the female joint fixed with two drilling rods respectively, be provided with the screw thread chamber of frustum shape on the terminal surface that the male joint is close to the female joint, female joint and screw thread chamber threaded connection, the bottom in screw thread chamber is provided with the blotter that adopts stereoplasm rubber to make, be provided with a plurality of springs between blotter and the screw thread chamber, the both ends of spring are fixed with the bottom surface in blotter and screw thread chamber respectively, the blotter is in the compression state this moment with the terminal surface butt of female joint and spring.

Through adopting above-mentioned technical scheme, the blotter is portable when this connects and receives the impact, and the blotter conducts the elasticity of spring for female joint, strengthens fixed influence to pin joint and female joint through compressing tightly threaded connection part reinforcing screw thread auto-lock nature, realizes axial shock attenuation, effective increase of service life through providing buffer space in the axial.

The utility model discloses further set up to: an annular shoulder is fixed on the outer circumferential surface of the male connector, the inner circumferential surface of the shoulder is in a step shape, an annular abutting edge is fixed on the outer circumferential surface of the female connector corresponding to the shoulder, the outer circumferential surface and the end surface of the abutting edge are simultaneously abutted against the shoulder when the female connector is in threaded connection with the threaded cavity, and a damping ring is fixed on the outer circumferential surface of the abutting edge.

Through adopting above-mentioned technical scheme, butt limit gomphosis is in the circular bead when male joint is connected with female joint, lets the damping ring radially provide shock-absorbing function when further spacing fixed, uses the energy of vibrations and slows down the mutual wearing and tearing of male joint and female joint through elasticity and the flexible effective absorption of damping ring, and life further prolongs.

The utility model discloses further set up to: the outer circumferential surface of the shoulder is in threaded connection with compression bolts, the axial lines of the compression bolts are perpendicular to the axial direction of the shoulder, the number of the compression bolts is a plurality of the compression bolts and the compression bolts surround the axial lines of the shoulder, and the end parts of the bolt bodies of the compression bolts penetrate through the shoulder and are abutted to the damping rings.

Through adopting above-mentioned technical scheme, the user can freely screw clamp bolt according to the demand of oneself, further spacing and reinforcing connection stability through clamp bolt to the compressing tightly and the friction on butt joint limit.

The utility model discloses further set up to: the compression bolt is embedded on the shoulder, an accommodating groove for accommodating the compression bolt is formed in the outer circumferential surface of the shoulder, and a rubber plug for sealing the accommodating groove is connected to the outer circumferential surface of the shoulder in an embedded mode.

Through adopting above-mentioned technical scheme, the rubber buffer can intercept debris such as rubbish and oil and get into connection structure when preventing housing bolt and circular bead separation, and the leakproofness is better and it is more convenient to use.

The utility model discloses further set up to: the bottom end of the threaded cavity, which is far away from the outside of the male connector, is provided with a stress relief groove, the end part of the female connector, which is close to the threaded cavity, is provided with a non-threaded nose end corresponding to the stress relief groove, and the non-threaded nose end and the stress relief groove are parallel and level when the female connector is in threaded connection with the male connector.

By adopting the technical scheme, the unthreaded nose end and the stress release groove can avoid stress concentration, and the possibility of damage to the male joint and the female joint is effectively reduced.

The utility model discloses further set up to: and a plurality of punctiform rubber bulges for strong sealing property and connection stability are embedded on the outer surface of the female joint.

Through adopting above-mentioned technical scheme, rubber is protruding can strengthen sealed degree and increase simultaneously and connect frictional force, effectively improves connection stability, uses safelyr.

The utility model discloses further set up to: and the threaded cavity is coated with a wear-resistant coating.

Through adopting above-mentioned technical scheme, wear-resisting coating can come increase of service life through the wearing and tearing speed that slows down the screw thread chamber, and it is long when the change interval that the increase user changed the male joint completely.

The utility model discloses further set up to: an annular shock absorption cavity is arranged in the male connector, and shock absorption damping materials are filled in the shock absorption cavity.

Through adopting above-mentioned technical scheme, the damping material can absorb and use vibrations, strengthens the shock attenuation effect.

To sum up, the utility model discloses a beneficial technological effect does:

1. the vibration is absorbed in the axial direction through the elastic force of the movable cushion pad and the spring, so that the speed of thread abrasion is effectively reduced, and the service life is prolonged;

2. through damping ring and damping material in radial shock attenuation, the shock attenuation effect is better.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of the present invention for the internal structure of the threaded cavity.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a partially enlarged schematic view of a portion B in fig. 2.

In the figure, 1, a male connector; 11. a threaded cavity; 111. a stress relief groove; 112. a wear-resistant coating; 12. a cushion pad; 13. a spring; 14. a damping chamber; 141. a damping material; 2. a female joint; 21. a threadless nose; 22. a rubber protrusion; 23. abutting the edges; 231. a damping ring; 3. a shoulder; 31. an accommodating groove; 32. a hold-down bolt; 33. and a rubber plug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-4.

Referring to fig. 1 and 2, for the utility model discloses an elasticity tool joint, including male joint 1 and the female joint 2 fixed with two drilling rods respectively, male joint 1 and female joint 2 all are the solid of revolution. The end face of the male connector 1, which is close to the female connector 2, is provided with a frustum-shaped threaded cavity 11, and the female connector 2 is in threaded connection with the threaded cavity 11. The bottom end of the threaded cavity 11 is provided with a cushion pad 12 made of hard rubber, a plurality of springs 13 are arranged between the cushion pad 12 and the threaded cavity 11, and two ends of each spring 13 are respectively fixed with the bottom surfaces of the cushion pad 12 and the threaded cavity 11. When the female connector 2 is screwed into the threaded cavity 11, the cushion 12 abuts against the end face of the female connector 2 and the spring 13 is in a compressed state.

When using to vibrate the emergence, the mobility of blotter 12 provides the buffering space in the axial, and spring 13's elasticity can drive female joint 2 and the separation of male joint 1 to make threaded connection's part compress tightly in the axial, cooperation screw thread auto-lock nature male joint 1 is more stable with female joint 2's connection, and convenient to use has just effectively prolonged life through the shock attenuation.

Referring to fig. 2 and 4, for further damping in the axial direction, a bottom end of the threaded cavity 11 away from the outside of the male connector 1 is provided with a stress relief groove 111 with an arc-shaped cross section, an end of the female connector 2 close to the inside of the threaded cavity 11 is provided with a non-threaded nose 21, and the non-threaded nose 21 and the stress relief groove 111 are flush when the female connector 2 is in threaded connection with the male connector 1. The stress relief groove 111 and the unthreaded nose 21 provide a stress buffering space, avoiding stress concentrations, further extending the service life. Meanwhile, an annular shock absorption cavity 14 is formed in the male connector 1, shock absorption and damping materials 141 are filled in the shock absorption cavity 14, and when the male connector 1 is impacted, the shock absorption and damping materials 141 can absorb shock energy to absorb shock integrally.

Referring to fig. 2 and 3, to further absorb shock in the radial direction, an annular shoulder 3 is fixed to the outer circumferential surface of the male connector 1, the shoulder 3 is stepped, and a stepped surface is located on the inner circumferential surface of the shoulder 3. An annular abutting edge 23 is fixed on the outer circumferential surface of the female connector 2 corresponding to the shoulder 3, and the abutting surface is matched with the stepped inner circumferential surface of the shoulder 3. When the female connector 2 is screwed into the threaded cavity 11, the outer circumferential surface and the end surface of the abutting edge 23 are simultaneously abutted against the stepped inner circumferential surface of the shoulder 3, and a damping ring 231 is fixed to the outer circumferential surface of the abutting edge 23, and the damping ring 231 is abutted against the shoulder 3. When using vibrations to take place, the elasticity of damping ring 231 can be at radial shock attenuation, effectively alleviates male joint 1 and female joint 2 and at radial mutual wearing and tearing, and the shock attenuation effect is better.

Referring to fig. 1 and 3, in order to enhance the connection stability of the male connector 1 and the female connector 2, compression bolts 32 are screwed on the outer circumferential surface of the shoulder 3, the axes of the compression bolts 32 are perpendicular to the axis of the shoulder 3, the number of the compression bolts 32 is four, the compression bolts 32 are arranged in a circumferential array around the axis of the shoulder 3, and the bolt end portions of the compression bolts 32 penetrate through the shoulder 3 and abut against the damping rings 231. The hold-down bolts 32 are embedded in the shoulder 3, the outer circumferential surface of the shoulder 3 is provided with four receiving grooves 31, and the receiving grooves 31 are arranged corresponding to the hold-down bolts 32. The head of the pressure bolt 32 is positioned in the housing groove 31, and a rubber stopper 33 for closing the housing groove 31 is fitted into the housing groove 31, and the end surface of the rubber stopper 33 remote from the pressure bolt 32 is flush with the outer circumferential surface of the shoulder 3. Referring to fig. 2 and 4, a plurality of caulking grooves are formed on the outer circumferential surface of the female connector 2, rubber protrusions 22 are fixed in the caulking grooves, the rubber protrusions 22 slightly exceed the caulking grooves in a normal state, and when the female connector 2 and the male connector 1 are screwed, the rubber protrusions 22 abut against the screw cavity 11.

The user can further enhance the stability of the fixed connection between the male connector 1 and the female connector 2 by the pressing of the pressing bolt 32 against the abutting edge 23 and the friction force between the pressing bolt 32 and the damping ring 231, and further prevent the relative displacement or separation between the two. And the rubber plug 33 prevents the compression bolt 32 from loosening, and the rubber plug 33 can intercept dirt and oil in the drilling environment at the same time, so that the use is convenient, and a user can separate the male connector 1 and the female connector 2 at a later date. The rubber protrusion 22 effectively increases the friction force between the male connector 1 and the female connector 2 while enhancing the sealing, so that the connection stability and the use safety are further enhanced.

Referring to fig. 2, in order to further prolong the service life, a wear-resistant coating 112 made of ceramic powder and the like is coated in the threaded cavity 11, so that the wear speed of the threaded cavity 11 is effectively reduced, and the use is convenient.

The implementation principle of the embodiment is as follows: when the use is shaken and is taken place, the mobility of blotter 12 has provided the buffering space in the axial, and the elasticity of spring 13 makes threaded connection's part compress tightly in the axial, and the connection of cooperation screw thread auto-lock nature male joint 1 and female joint 2 is more stable, and damping material 141 absorbs the vibrations energy in shock attenuation chamber 14, and damping ring 231 is at the axial buffering, and convenient to use has just effectively prolonged life through all-round shock attenuation.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An elasticity tool joint, includes male joint (1) and female joint (2) fixed with two drilling rods respectively, its characterized in that: be provided with screw thread chamber (11) of frustum shape on the terminal surface that male joint (1) is close to female joint (2), female joint (2) and screw thread chamber (11) threaded connection, the bottom of screw thread chamber (11) is provided with blotter (12) that adopt hard rubber to make, be provided with a plurality of springs (13) between blotter (12) and screw thread chamber (11), the both ends of spring (13) are fixed with the bottom surface of blotter (12) and screw thread chamber (11) respectively, blotter (12) and the terminal surface butt of female joint (2) and spring (13) are in the compression state this moment.

2. The resilient drill pipe joint as defined in claim 1, wherein: be fixed with annular shoulder (3) on the outer periphery of male joint (1), the inner peripheral face of shoulder (3) is the echelonment setting, it is fixed with annular butt edge (23) to correspond shoulder (3) on the outer periphery of female joint (2), the outer periphery and the terminal surface of butt edge (23) are simultaneously with shoulder (3) butt when female joint (2) and threaded cavity (11) threaded connection, be fixed with damping ring (231) on the outer periphery of butt edge (23).

3. A resilient drill pipe joint as defined in claim 2, wherein: the outer circumferential surface of the shoulder (3) is in threaded connection with a pressing bolt (32), the axis of the pressing bolt (32) is perpendicular to the axial direction of the shoulder (3), the number of the pressing bolts (32) is a plurality of, the pressing bolts surround the axis of the shoulder (3), and the end part of a bolt body of each pressing bolt (32) penetrates through the shoulder (3) and is abutted to the damping ring (231).

4. A resilient drill pipe joint according to claim 3, wherein: compression bolt (32) inlay and establish on shoulder (3), be provided with on the outer periphery of shoulder (3) and be used for holding accommodation groove (31) of compression bolt (32), the gomphosis is connected with rubber buffer (33) that are used for sealing accommodation groove (31) on the outer periphery of shoulder (3).

5. A resilient drill pipe joint according to claim 1 or 4, wherein: threaded cavity (11) are kept away from the outer bottom of pin (1) and are provided with stress relief groove (111), female joint (2) are close to and correspond stress relief groove (111) on the tip in threaded cavity (11) and are provided with unthreaded nose (21), unthreaded nose (21) and stress relief groove (111) parallel and level when female joint (2) and pin (1) threaded connection.

6. The resilient drill pipe joint as defined in claim 5, wherein: and a plurality of punctiform rubber bulges (22) for strong sealing property and connection stability are embedded on the outer surface of the female joint (2).

7. The resilient drill pipe joint as defined in claim 6, wherein: the threaded cavity (11) is internally coated with a wear-resistant coating (112).

8. The resilient drill pipe joint as defined in claim 1, wherein: an annular shock absorption cavity (14) is arranged in the male connector (1), and shock absorption damping materials (141) are filled in the shock absorption cavity (14).