CN211287553U

CN211287553U - Drill string adapter

Info

Publication number: CN211287553U
Application number: CN201922202229.4U
Authority: CN
Inventors: 郑廷碧; 补声军; 黄保黔; 梁柔
Original assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Current assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-08-18
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a drill string crossover sub. Comprises a body (1), wherein the body (1) is of a tubular structure; the inner hole of the body (1) is a water hole (2), and the excircle of the body (1) is of a reducing structure; the upper end of the body (1) is provided with an upper thread (9), the lower end of the body (1) is provided with a lower thread (10), and the middle section of the excircle is a hanging slot (3); the thickest section of the excircle close to the lower thread (10) is a stable section (7). The utility model discloses simple structure, the novelty improves on original crossover sub, except having the screw thread conversion function of basic crossover sub, still has the effect of stabilizing drilling tool, extrinsic cycle drilling fluid, the lifting by crane and the operation of the instrument of being convenient for simultaneously. The utility model discloses not only can be used to the conversion between the drilling string, still can be connected with the salvage mill shoes class instrument in well drilling, the well workover and use.

Description

Drill string adapter

Technical Field

The utility model relates to a drill string crossover sub belongs to workover equipment technical field.

Background

When the rotary step threaded connections among the kelly bar, the drill rod, the drill collar and the drill bit are inconsistent, the drill can normally drill only by performing threaded switching connections of different specifications through the switching joint. The existing drill string adapter can meet the requirements of conventional drilling, but has single function. Has no other functions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drilling string crossover sub, except can be used to the conversion function between the drilling string, still can be connected with the fishing in well drilling, the well workover and grind shoes class instrument and use, extrinsic cycle drilling fluid to overcome prior art's not enough.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a drill string adapter comprises a body, wherein the body is of a tubular structure; the inner hole of the body is a water hole, and the excircle of the body is of a reducing structure; the upper end of the body is provided with an upper thread, the lower end of the body is provided with a lower thread, and the thinnest section in the middle of the excircle is a hanging slot; the thickest section near the excircle of the lower thread is a stable section.

In the drill string adapter, the upper part of the elevator slot is a conical surface; the middle section is a cylindrical surface, and the lower end is a vertical surface in arc transition with the cylindrical surface.

In the drill string adapter, the conical surface is a conical surface with a large upper part and a small lower part.

In the drill string adapter, the conical surface has a cone angle α of 18 °.

In the drill string adapter, a group of uniformly distributed spiral grooves is arranged on the stabilizing section.

In the drill string adapter, the upper thread of the body is an inner pipe thread or an outer pipe thread; the lower thread of the body is an outer pipe thread or an inner pipe thread.

In the drill string adapter, the upper thread and the lower thread are both threads special for oil drill string components.

Since the technical scheme is used, the utility model discloses compare with prior art, the utility model discloses simple structure, the novelty improves on original crossover sub, except having basic crossover sub's screw thread conversion function, still has stable drilling tool, extrinsic cycle drilling fluid effect. Meanwhile, the lifting and connecting operation of the tool is convenient. The utility model discloses not only can be used to the conversion between the drilling string, still can be connected with the salvage mill shoes class instrument in well drilling, the well workover and use.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a front view of fig. 1.

The labels in the figures are: 1-body, 2-water hole, 3-hanging slot, 4-conical surface, 5-arc transition, 6-vertical surface, 7-stable section, 8-spiral groove, 9-upper thread and 10-lower thread.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model relates to a drill string adapter, as shown in figures 1 and 2, which comprises a body 1, wherein the body 1 is of a tubular structure; the inner hole of the body 1 is a water hole 2, and the outer circle of the body 1 is of a reducing structure; the upper end of the body 1 is provided with an upper thread 9, the lower end of the body 1 is provided with a lower thread 10, and the thinnest section in the middle of the excircle is a hanging slot 3; the thickest section of the outer circle near the lower thread 10 is a stable section 7. The upper part of the hanging slot 3 is a conical surface 4; the middle section is a cylindrical surface, and the lower end is a vertical surface 6 in arc transition 5 with the cylindrical surface. The conical surface 4 is a conical surface with a large upper part and a small lower part. The conical surface 4 has a cone angle alpha of 18 deg.. A group of uniformly distributed spiral grooves 8 are arranged on the stabilizing section 7. The upper thread 9 of the body 1 is an inner pipe thread or an outer pipe thread; the lower thread 10 of the body 1 is an outer pipe thread or an inner pipe thread. The upper thread 9 and the lower thread 10 are both threads dedicated to oil drill string components.

In specific implementation, the upper thread 9 of the body 1 is an inner pipe thread, and the lower thread 10 of the body 1 is an outer pipe thread. The upper thread 9 and the lower thread 10 are both petroleum drill string specific threads for converting the drill string threads to be connected. A hanging clamping groove 3 is arranged at the upper end of the middle part of the body 1, the upper end of the hanging clamping groove 3 is an 18-degree conical surface 4, a section of cylindrical surface is arranged in the middle of the hanging clamping groove 3, and the lower end of the hanging clamping groove 3 is a vertical surface 6 formed by arc transition 5 with the cylindrical surface 4; the hoisting clamping groove 3 is used for hoisting the adapter or is connected with other drilling tools to hoist the drilling tools below the adapter. The diameter section of the middle lower end of the body 1 is a stable section 7; the stabilizing section 7 is provided with more than three spiral grooves 8 which are uniformly distributed along the circumference. The stable section 7 is contacted with the inner wall of the casing along with the tool descending into the casing, so that the drilling tool is stabilized, and the spiral groove 8 on the stable section 7 plays a role in circulating drilling fluid.

The utility model discloses simple structure, the novelty improves on original crossover sub, except having basic crossover sub's screw thread conversion function, still has stable drilling tool, extrinsic cycle drilling fluid effect. Meanwhile, the lifting and the operation of the tool are convenient. The utility model discloses not only can be used to the conversion between the drilling string, still can be connected with the salvage mill shoes class instrument in well drilling, the well workover and use.

Claims

1. A drill string adapter, comprising a body (1), characterized in that: the body (1) is of a tubular structure; the inner hole of the body (1) is a water hole (2), and the excircle of the body (1) is of a reducing structure; the upper end of the body (1) is provided with an upper thread (9), the lower end of the body (1) is provided with a lower thread (10), and the middle section of the excircle is a hanging slot (3); the thickest section of the excircle close to the lower thread (10) is a stable section (7).

2. The drill string adapter according to claim 1, wherein: the upper part of the hanging slot (3) is a conical surface (4); the middle section is a cylindrical surface, and the lower end is a vertical surface (6) in arc transition (5) with the cylindrical surface.

3. The drill string adapter according to claim 2, wherein: the conical surface (4) is a conical surface with a large upper part and a small lower part.

4. The drill string adapter according to claim 3, wherein: the conical surface (4) has a cone angle alpha of 18 degrees.

5. The drill string adapter according to claim 1, wherein: and a group of uniformly distributed spiral grooves (8) are arranged on the stabilizing section (7).

6. The drill string adapter according to claim 1, wherein: the upper thread (9) of the body (1) is an inner pipe thread or an outer pipe thread; the lower thread (10) of the body (1) is an outer pipe thread or an inner pipe thread.

7. The drill string adapter according to claim 6, wherein: the upper thread (9) and the lower thread (10) are both special threads for petroleum drill string components.