CN215256076U

CN215256076U - Drill rod male joint with multiple shoulders

Info

Publication number: CN215256076U
Application number: CN202121797712.2U
Authority: CN
Inventors: 蔡纪东; 张军
Original assignee: Wuxi Huaxin Petroleum Machine Co ltd
Current assignee: Wuxi Huaxin Petroleum Machine Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2021-12-21
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a public joint of drilling rod of many shoulders, its technical scheme is including connecting the body, the one end that connects the body is provided with the threaded connection head, be provided with first circular bead, second circular bead and third circular bead between joint body and the threaded connection head, the one end that the threaded connection head was kept away from to the joint body is provided with the fourth circular bead, the utility model discloses higher antitorque ability has.

Description

Drill rod male joint with multiple shoulders

Technical Field

The utility model relates to a drilling rod joint part field especially relates to a public joint of drilling rod of many shoulders.

Background

Drill pipe joints are connecting elements for connecting drill pipes, and are generally a pair of mating male and female joints. With the development of the times, deep sea drilling and high altitude drilling are more and more emphasized, but with the increase of the drilling depth, the torsional load borne by the drill rod is also increased, the torsional resistance of the tool joint is generally lower than that of the rod body, but in order to improve the drilling performance of the drill rod, the joint is required to transmit the high torque required by drilling, and the joint is required to have higher torsional resistance.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a multi-shoulder drill pipe male joint with higher torsion resistance.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a public joint of drilling rod of many shoulders, includes the joint body, the one end of joint body is provided with threaded connection head, be provided with first circular bead, second circular bead and third circular bead between joint body and the threaded connection head, the one end that the threaded connection head was kept away from to the joint body is provided with the fourth circular bead.

Further, first circular bead sets up the inboard at threaded connection head, the diameter of first circular bead is greater than threaded connection head's diameter.

Further, the second shoulder is located inside the first shoulder, and the diameter of the second shoulder is larger than the diameter of the first shoulder.

Furthermore, the first shoulder and the second shoulder are transited through an arc surface.

Further, the third shoulder is located inside the second shoulder, and the diameter of the third shoulder is larger than the diameter of the second shoulder.

Furthermore, a transition groove is formed between the third shoulder and the second shoulder.

Further, the cross section of the transition groove is semicircular, and the size of the transition groove is R0.79 +/-0.1 mm.

Furthermore, the outward surface of the fourth shoulder is an arc surface.

Furthermore, the outer side of the joint body is provided with a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove are arranged along the circumferential direction of the joint body.

Further, an inner hole is formed in the connector body and is divided into a first horizontal section and a second horizontal section, and a transition arc surface is arranged between the first horizontal section and the second horizontal section.

By adopting the technical scheme.

To sum up, the utility model discloses following beneficial effect has:

1. when the threaded connector rotates, the tail teeth of the threaded connector are stressed in a concentrated mode, stress is dispersed through the shoulders, the stress on the threaded connection part of the male connector is more uniform, the torsion resistance is further improved, higher torque can be transmitted, and the condition that the connector is loosened or disengaged is reduced.

2. Because the shoulder position is stress concentration position, so adopt the arc surface or curved transition groove to carry on excessively between each shoulder, avoid appearing the pointed end and lead to stress excessive concentration, be favorable to guaranteeing the shoulder can not concentrate the destruction because of stress excessive, improve the life of shoulder.

3. The first limiting groove and the second limiting groove provide a force application space for workers to install the male connector, and tools such as a cable can be conveniently clamped in the force application space.

Drawings

FIG. 1 is a schematic view of a half-section of a multi-shoulder drill pipe male joint;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

In the figure, 1, a joint body; 11. a first shoulder; 12. a second shoulder; 13. a third shoulder; 131. a transition groove; 2. a threaded connector; 3. a fourth shoulder; 4. a first limit groove; 5. a second limit groove; 6. an inner bore; 61. a first horizontal segment; 62. a second horizontal segment; 63. a transition cambered surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following device of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

Example (b):

a multi-shoulder drill rod male joint comprises a joint body 1, wherein the joint body 1 is in a circular tube shape.

Further, as shown in fig. 1, one end of the joint body 1 is provided with a threaded connector 2, and the side surface of the threaded connector 2 is inclined, and the diameter thereof is gradually reduced from inside to outside. The side surface of the threaded connector 2 is provided with external threads.

Further, as shown in fig. 1, the inner and outer edges of the end of the threaded connector 2 are provided with chamfers, and the chamfers are 60 °.

Further, as shown in fig. 1 and 2, a first shoulder 11, a second shoulder 12, and a third shoulder 13 are provided between the joint body 1 and the threaded joint 2.

Further, as shown in fig. 1 and 2, the first shoulder 11 is disposed inside the threaded connector 2, the diameter of the first shoulder 11 is larger than that of the threaded connector 2, and the transition between the first shoulder 11 and the threaded connector 2 is performed by an inclined surface, so as to avoid causing excessive stress concentration at the transition position. Due to the concentrated stress at the tail teeth of the threaded connector 2, the first shoulder 11 can share the stress, and the torsion resistance is improved.

Further, as shown in fig. 1 and 2, the second shoulder 12 is located inside the first shoulder 11, the diameter of the second shoulder 12 is larger than that of the first shoulder 11, and the second shoulder 12 acts the same as the first shoulder 11 to further share the load. The first shoulder 11 and the second shoulder 12 are transited by an arc surface, wherein the size of the arc surface is R0.79 +/-0.1 mm, so that the stress concentration caused by the tip is avoided.

Further, as shown in fig. 1 and 2, a third shoulder 13 is located inside the second shoulder 12, the diameter of the third shoulder 13 is larger than that of the second shoulder 12, the third shoulder 13 is also used for load sharing, and the three shoulders cooperate to distribute stress more evenly at the shoulder and the threaded connection.

Further, as shown in fig. 2, a transition groove 131 is formed between the third shoulder 13 and the second shoulder 12, the transition groove 131 is located on the end surface of the third shoulder 13, and the cross section of the transition groove 131 is semicircular, and the size of the transition groove 131 is R0.79 ± 0.1mm, so that the stress concentration caused by the tip is avoided.

Further, as shown in fig. 1, the outer edge of the third shoulder 13 is provided with a 45 ° chamfer.

Further, as shown in fig. 1, one end of the joint body 1, which is far away from the threaded joint 2, is provided with a fourth shoulder 3, and one outward surface of the fourth shoulder 3 is an arc-shaped surface.

Further, as shown in fig. 1, the first shoulder 11, the second shoulder 12, the third shoulder 13, the fourth shoulder 3, and the threads of the threaded connector 2 are all subjected to surface treatment of copper plating, phosphating and nitriding, so that the elastic strength of the material is further enhanced, and the torsion resistance and the bearing capacity of the male connector are greatly improved.

Further, as shown in fig. 1, the outer side of the joint body 1 is provided with a first limiting groove 4 and a second limiting groove 5, the first limiting groove 4 and the second limiting groove 5 are arranged along the circumferential direction of the joint body 1, the first limiting groove 4 is located on the inner side of the fourth shoulder 3, and the second limiting groove 5 is located on the inner side of the second limiting groove 5. The first limiting groove 4 and the second limiting groove 5 play a role in positioning on one hand, and on the other hand, can also be used for clamping parts such as a cable or a lantern ring and the like to provide a force application space for installing the joint.

Further, as shown in fig. 1, the cross section of the first limiting groove 4 is an isosceles trapezoid, and an included angle formed between two sides of the isosceles trapezoid and the axial direction of the joint body 1 is 45 °.

Further, as shown in fig. 1, the cross section of the second limiting groove 5 is arc-shaped.

Further, as shown in fig. 1, an inner hole 6 is formed in the joint body 1, the inner hole 6 is arranged on a central axis of the joint body 1, the inner hole 6 is divided into a first horizontal section 61 and a second horizontal section 62, the first horizontal section 61 is located inside the fourth shoulder 3, the second horizontal section 62 is located inside the threaded joint 2, and a transition arc surface 63 is arranged between the first horizontal section 61 and the second horizontal section 62.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a public joint of drilling rod of many shoulders which characterized in that: including connecting the body, the one end that connects the body is provided with threaded connection head, be provided with first circular bead, second circular bead and third circular bead between joint body and the threaded connection head, the one end that connects the body and keep away from threaded connection head is provided with the fourth circular bead.

2. The multi-shoulder drill pipe male joint of claim 1, wherein: the first shoulder is arranged on the inner side of the threaded connector, and the diameter of the first shoulder is larger than that of the threaded connector.

3. The multi-shoulder drill pipe male joint of claim 2, wherein: the second shoulder is located inboard of the first shoulder, and the second shoulder has a diameter greater than the diameter of the first shoulder.

4. The multi-shoulder drill pipe male joint of claim 3, wherein: the first shoulder and the second shoulder are transited through an arc surface.

5. The multi-shoulder drill pipe male joint of claim 4, wherein: the third shoulder is located inboard of the second shoulder, and the third shoulder has a diameter greater than the diameter of the second shoulder.

6. The multi-shoulder drill pipe male joint of claim 5, wherein: and a transition groove is formed between the third shoulder and the second shoulder.

7. The multi-shoulder drill pipe male joint of claim 6, wherein: the cross section of the transition groove is semicircular, and the size of the transition groove is R0.79 +/-0.1 mm.

8. The multi-shoulder drill pipe male joint of claim 1, wherein: the outward surface of the fourth shoulder is an arc surface.

9. The multi-shoulder drill pipe male joint of claim 1, wherein: the outer side of the joint body is provided with a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove are arranged along the circumferential direction of the joint body.

10. The multi-shoulder drill pipe male joint of claim 1, wherein: the connector body is internally provided with an inner hole which is divided into a first horizontal section and a second horizontal section, and a transition arc surface is arranged between the first horizontal section and the second horizontal section.