CN215256074U

CN215256074U - Long service life's female joint of drilling rod

Info

Publication number: CN215256074U
Application number: CN202121554340.0U
Authority: CN
Inventors: 蔡纪东; 张军; 丁义东
Original assignee: Wuxi Huaxin Petroleum Machine Co ltd
Current assignee: Wuxi Huaxin Petroleum Machine Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-21
Anticipated expiration: 2031-07-08

Abstract

The utility model discloses a long service life's drilling rod box joint, its technical scheme main points are including the body, be provided with first screw thread section, second screw thread section and third screw thread section in the body, wherein first screw thread section arranges the tip at the body, first screw thread section is the slope setting by interior to outer aperture grow gradually, the second screw thread section sets up at first screw thread section inboard, be provided with the linkage segment in the body, third screw thread section sets up the inboard at the linkage segment, the utility model has the advantages of sufficient buffering space reduces the tooth condition of hitting each other, improves box joint's life.

Description

Long service life's female joint of drilling rod

Technical Field

The utility model relates to a drilling equipment field, in particular to long service life's drilling rod female joint.

Background

In recent years, with the increase of the development difficulty of oil and gas reservoirs with complex formations, new requirements are put forward on the oil drilling technology. Measurement while drilling, bottom hole electric drilling tools and intelligent drilling all come into play. How to realize the efficient power transmission of the bottom hole electric drilling tool and the transmission of measurement while drilling data becomes a difficult point of the technical development. The key of transmission is that the drill rod is the main body of the drilling tool and has the functions of tripping and bearing load and torque, and because the space of the drill rod is limited and the drill rod needs to be connected up and down, how to realize the electric power and information feedback channel in the drill rod is the key point of the design of the drill rod joint.

The drill pipe joints are divided into male joints and female joints, the male joints and the female joints are generally butt-welded at two ends of the drill pipes, and the drill pipes are screwed together through threads of the male joints and the female joints. At present, a main stream female joint adopts a one-section type linear thread, but when a drill rod joint rotates, the end part of the threaded connection is a stress concentration part, and the traditional linear thread is easy to collide with developed teeth, so that the thread is damaged in serious conditions, and the service life of the joint is greatly shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the shortcoming of above-mentioned prior art, the utility model aims at providing a long service life's drilling rod female joint has sufficient buffering space, reduces the tooth condition of colliding with, improves female joint's life's advantage.

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

the utility model provides a long service life's drilling rod box joint, includes the body, be provided with first screw thread section, second screw thread section and third screw thread section in the body, wherein first screw thread section arranges the tip at the body, first screw thread section is the slope setting by interior to outer aperture grow gradually, the second screw thread section sets up at first screw thread section inboard, be provided with the linkage segment in the body, the third screw thread section sets up the inboard at the linkage segment.

Further, the first thread section includes the groove, the groove is located the port department of body, the groove is from inside to outside aperture grow gradually.

Further, the connecting section comprises a first step and a second step, and the aperture of the first step is smaller than that of the second step.

Further, a transition section is arranged between the first step and the second step.

Further, the surface of the transition section is arc-shaped.

Furthermore, a connecting hole is formed in the first step and penetrates through the transition section.

Further, the number of the connecting holes is at least four, and the connecting holes are uniformly arranged along the circumferential direction of the first step.

Furthermore, the connecting hole is a counter bore.

Furthermore, the outer side of the pipe body is provided with a bulge, and the bulge is arranged at the tail end of the connecting section.

Furthermore, the number of the bulges is at least two, and a certain gap is reserved between every two adjacent bulges.

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

1. the first thread section is obliquely arranged, so that the stress in different directions is adapted, a larger tooth space is reserved, and an enough buffer space is reserved, so that the collision condition of teeth is reduced, the condition that threads at a port are broken is reduced, and the service life of the female joint is prolonged;

2. the inlet of the first thread section adopts a groove, so that the male connector can be conveniently inserted into the female connector;

3. adopt the multistage screw thread to cooperate, guaranteed on the one hand that relevant joint part connects ground compactness, on the other hand reduces as far as possible and destroys the improvement integrality to the body inner wall.

4. Because the connecting section is the place that is used for fixing bolt, it is the department that stress concentration, so the transition of step adopts the arc setting, avoids appearing most advanced and leads to excessive stress concentration, avoids the part to destroy easily, is favorable to prolonging its life.

Drawings

FIG. 1 is a schematic view of a long life tool pipe box;

FIG. 2 is a schematic view of a long-life tool joint for embodying a link section.

In the figure, 1, a tube body; 11. a protrusion; 2. a first thread segment; 21. beveling; 3. a second thread segment; 4. a third thread segment; 5. a connecting section; 51. a first step; 511. connecting holes; 52. a second step; 53. a transition section.

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 drill rod female joint with long service life is shown in figure 1 and comprises a pipe body 1, wherein a first thread section 2, a second thread section 3 and a third thread section 4 are arranged in the inner wall of the pipe body 1, and the pipe body 1 of the female joint is in locking fit with a corresponding male joint through a plurality of thread sections in work.

As shown in fig. 1, the first thread section 2 is arranged at the end of the pipe body 1, the first thread section 2 is obliquely arranged from inside to outside, the end of the pipe body 1 is a stress concentration place, so that the first thread section 2 adopts an oblique thread mode to adapt to the stress in different directions, a larger tooth space is reserved, a sufficient buffer space is reserved, the tooth collision condition is reduced, the situation of thread breakage at the port is reduced, and the service life of the female joint is prolonged. First screw thread section 2 includes groove 21, and groove 21 is located the port department of body 1, and groove 21 from inside to outside aperture grow gradually to its inclination is greater than first screw thread section 2, and when the erection joint, convenient supporting male joint inserts smoothly from groove 21.

As shown in fig. 1, the second thread segments 3 are located inside the first thread segments 2, and a certain gap is left between the first thread segments 2 and the second thread segments 3.

Referring to fig. 1 and 2, a connecting section 5 is provided in the pipe body 1, and the third thread section 4 is provided inside the connecting section 5. The connecting section 5 comprises a first step 51 and a second step 52, the aperture of the first step 51 is smaller than that of the second step 52, and a transition section 53 is arranged between the first step 51 and the second step 52. The surface of changeover portion 53 is the arc setting, in order to avoid appearing sharp-pointed edge, reduces the excessive concentration of stress, also reduces simultaneously and collides with. The number of the connecting holes 511 is at least four, in this embodiment, the connecting holes 511 are four, the connecting holes 511 are uniformly arranged along the circumferential direction of the first step 51, the connecting holes 511 are counter-sunk holes, and a bolt connects the mating male connector and the female connector through the connecting holes 511.

As shown in fig. 1, there are protrusions 11 on the outer side of the pipe body 1, the protrusions 11 are disposed at the tail end of the connecting section 5, at least two protrusions 11 are provided, in this embodiment, three protrusions 11 are provided, and a certain gap is left between adjacent protrusions 11. Because inside workman personnel can't the direct observation body 1 from the outside, can follow the protruding 11 third screw thread section 4 of knowing of observation, still make things convenient for the staff to take simultaneously.

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 long service life's drilling rod box which characterized in that: including body (1), be provided with first screw thread section (2), second screw thread section (3) and third screw thread section (4) in body (1), wherein first screw thread section (2) are arranged at the tip of body (1), first screw thread section (2) are the slope setting by interior outside aperture grow gradually, second screw thread section (3) set up in first screw thread section (2) inboardly, be provided with linkage segment (5) in body (1), third screw thread section (4) set up the inboard in linkage segment (5).

2. The drill pipe box as recited in claim 1, wherein the drill pipe box comprises: first screw thread section (2) include groove (21), groove (21) are located the port department of body (1), groove (21) grow gradually from inside to outside aperture.

3. The drill pipe box as recited in claim 1, wherein the drill pipe box comprises: the connecting section (5) comprises a first step (51) and a second step (52), and the aperture of the first step (51) is smaller than that of the second step (52).

4. A long-life tool pipe box according to claim 3, wherein: a transition section (53) is arranged between the first step (51) and the second step (52).

5. The drill pipe box as recited in claim 4, wherein the drill pipe box comprises: the surface of the transition section (53) is arc-shaped.

6. The drill pipe box as recited in claim 5, wherein the drill pipe box comprises: the first step (51) is provided with a connecting hole (511), and the connecting hole (511) penetrates through the transition section (53).

7. The drill pipe box as recited in claim 6, wherein the drill pipe box comprises: the connecting holes (511) are at least four, and the connecting holes (511) are uniformly arranged along the circumferential direction of the first step (51).

8. The drill pipe box as recited in claim 7, wherein the drill pipe box comprises: the connecting hole (511) is a counter bore.

9. The drill pipe box as recited in claim 1, wherein the drill pipe box comprises: the outside of body (1) has arch (11), arch (11) are arranged at linkage segment (5) tail end.

10. The drill pipe box as recited in claim 9, wherein: at least two bulges (11) are arranged, and a certain gap is reserved between every two adjacent bulges (11).