CN212985131U

CN212985131U - Drill rod joint with multi-shoulder structure

Info

Publication number: CN212985131U
Application number: CN202022053380.9U
Authority: CN
Inventors: 蔡纪东; 丁义东; 徐亮
Original assignee: Wuxi Huaxin Petroleum Machine Co ltd
Current assignee: Wuxi Huaxin Petroleum Machine Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-04-16
Anticipated expiration: 2030-09-17

Abstract

The application relates to the technical field of drill pipe joints, in particular to a drill pipe joint with a multi-shoulder structure, which comprises a male joint with an external thread and a female joint with an internal thread, wherein a first fixing ring is coaxially fixed on the male joint, a second fixing ring is coaxially connected on the female joint, a plurality of first lugs are uniformly arranged on one side, facing a second fixing ring, of the first fixing ring at intervals around the central axis of the drill pipe joint, adjacent first lugs surround a first groove, a plurality of second lugs are uniformly arranged on one side, facing the first fixing ring, of the second fixing ring at intervals around the central axis of the drill pipe joint, and adjacent second lugs surround a second groove; the first projection is inserted into the second groove in a matching manner, and the second projection is inserted into the first groove in a matching manner. This application has the effect that can make tool joint connect firm.

Description

Drill rod joint with multi-shoulder structure

Technical Field

The application relates to the technical field of drill pipe joints, in particular to a drill pipe joint with a plurality of shoulder structures.

Background

In the field of oil exploitation, a drill rod is a common device and is mainly used for connecting surface equipment of a drilling machine and drilling and grinding equipment or a bottom hole device at the bottom end of a drilling well, and one drill rod is limited in length, so that a plurality of drill rods are often required to be connected in series through drill rod joints in practical application.

The utility model discloses a utility model patent that bulletin number is CN204419059U discloses a tool joint, and this kind of tool joint connects the drilling rod through the cooperation of internal and external screw thread, but the drilling rod is rotating the in-process and only can not fasten the connection between two joints through the cooperation of internal and external screw thread, and the fast-speed rotation makes the screw thread of male joint and female joint easily loosen unstablely, makes the drilling rod junction easily appear the joint gap.

SUMMERY OF THE UTILITY MODEL

In order to make the tool joint connect firmly, this application provides a tool joint who has many shoulder structures.

The application provides a tool joint with many shoulder structures adopts following technical scheme:

a drill rod joint with a multi-shoulder structure comprises a male joint with an external thread and a female joint with an internal thread, wherein a first fixing ring is coaxially fixed on the male joint, a second fixing ring is coaxially connected on the female joint, a plurality of first lugs are uniformly arranged on the first fixing ring at intervals around the central axis of the drill rod joint towards the second fixing ring, adjacent first lugs are encircled to form a first groove, a plurality of second lugs are uniformly arranged on the second fixing ring at intervals around the central axis of the drill rod joint towards the first fixing ring, and adjacent second lugs are encircled to form a second groove; the first projection is inserted into the second groove in a matching manner, and the second projection is inserted into the first groove in a matching manner.

Through adopting above-mentioned technical scheme, the male joint is except that through threaded connection with the female joint, and the first recess on the first solid fixed ring matches each other with the solid fixed ring of second go up the second lug, and the first lug on the first solid fixed ring matches each other with the solid fixed ring of second go up the second recess, has so improved tool joint's anti-torque capacity, makes tool joint's connection more firm.

Preferably, the external thread comprises a first external thread and a second external thread, and a first plane is arranged between the first external thread and the second external thread along the radial direction of the drill rod joint; the internal thread includes first internal thread and second internal thread, is equipped with the second plane along tool joint radial between first internal thread and the second internal thread, and first plane pastes with the second plane mutually.

By adopting the technical scheme, the internal thread and the external thread are equally divided into two sections, the planes are arranged between the two sections, and the three planes form three circular beads by the two planes at the two ends of the external thread and the internal thread, so that the stress on the drill rod joint is shared, and the drill rod joint is not easy to damage.

Preferably, a first inserting key is arranged at the bottom of the first groove, the central axis of the first inserting key is parallel to the central axis of the drill rod joint, and a second inserting groove which is in inserting fit with the first inserting key is formed in the second bump; the bottom of the second groove is provided with a second inserting key, the central axis of the second inserting key is parallel to the central axis of the drill rod connector, and the first lug is provided with a first slot which is in inserting fit with the second inserting key.

Through adopting above-mentioned technical scheme, first key and the cooperation of second slot are inserted to the second, and the cooperation of second key and first slot makes the solid fixed ring of first solid fixed ring and the solid fixed ring's of second area of contact increase, has increased the frictional force between the solid fixed ring of first solid fixed ring and second, makes to connect more tightly.

Preferably, the top end of the first inserting key and the bottom wall of the second slot are fixed with a first magnet block which is mutually adsorbed; the top end of the second inserting key and the bottom wall of the first slot are fixed with second magnet blocks which are mutually adsorbed.

Through adopting above-mentioned technical scheme, the first magnet piece and the second magnet piece that adsorb each other further make the connection between first solid fixed ring and the solid fixed ring of second more firm.

Preferably, the first fixing ring and the second fixing ring are connected with the drill rod joint through outer hexagon screws, fixing pieces are fixed on the first fixing ring and the second fixing ring, and the fixing pieces abut against the side faces of nuts of the outer hexagon screws.

Through adopting above-mentioned technical scheme, in complicated operational environment, outer hex bolts can produce not hard up, and the stationary blade supports outer hex bolts, makes outer hex bolts be difficult to rotate to make outer hex bolts firmly fix first stationary blade and second stationary blade on the drilling rod joint.

Preferably, one end of the fixing piece facing the outer hexagon screw is provided with a flanging, and the flanging is tightly attached to the side face of the nut of the outer hexagon screw.

Through adopting above-mentioned technical scheme, the turn-ups has increased the area of contact of stationary blade with outer hexagonal screw nail cap, further prevents that outer hexagonal screw from skidding not hard up.

Preferably, a cushion is arranged between the first plane and the second plane.

Through adopting above-mentioned technical scheme, the impact force that male joint and female joint received when drilling rod joint received the axial force can be cushioned in the setting of blotter, prolongs drilling rod joint's life.

Preferably, the first fixing ring and the second fixing ring are fixedly connected with the circular ring on the back-to-back surfaces.

Through adopting above-mentioned technical scheme, when need unpack apart first solid fixed ring and second solid fixed ring, because there is the interaction force between the two and their and the frictional force of tool joint surface, directly unpack apart comparatively difficultly, and use tools such as hooks to catch on the ring then unpack apart first solid fixed ring and second solid fixed ring relatively easily.

Drawings

FIG. 1 is a schematic illustration of a tool joint having a multi-shoulder configuration in accordance with an embodiment of the present disclosure;

FIG. 2 is a side view of an embodiment of the present application with the first retaining ring and the second retaining ring concealed;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic view of a first fixed ring structure of an embodiment of the present application;

fig. 5 is a schematic view of a second fixed ring structure according to an embodiment of the present application.

Description of reference numerals: 1. an external thread; 2. a male connector; 3. an internal thread; 4. a female joint; 5. a first retaining ring; 6. a second retaining ring; 7. a first bump; 8. a first groove; 9. an outer hexagonal screw; 10. a first external thread; 11. a second external thread; 12. a first plane; 13. a first internal thread; 14. a second internal thread; 15. a second plane; 16. a first key; 17. a first slot; 18. a first magnet block; 19. a fixing sheet; 20. a screw; 21. flanging; 22. a cushion pad; 23. a circular ring; 24. a second bump; 25. a second groove; 26. a second key; 27. a second slot; 28. a second magnet block.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses tool joint with many shoulder structures.

Example 1

Referring to fig. 1, a drill pipe joint having a multi-shoulder structure includes a pin 2 having an external thread 1 (see fig. 3) and a box 4 having an internal thread 3 (see fig. 3), and the pin 2 and the box 3 are threadedly coupled to each other, resulting in insufficient stability. In order to improve tool joint's anti moment of torsion ability, strengthen tool joint's firm degree of connection, therefore coaxial coupling has first solid fixed ring 5 on the male joint 2, and first solid fixed ring 5 overlaps outside male joint 2, and coaxial coupling has solid fixed ring 6 of second on the female joint 4, and solid fixed ring 6 of second overlaps outside female joint 4, and first solid fixed ring 5 can peg graft the cooperation mutually with solid fixed ring 6 of second.

Referring to fig. 4, a plurality of first protruding blocks 7 are uniformly and integrally formed on one surface of the first fixing ring 5 facing the second fixing ring 6 at intervals around the central axis of the drill rod joint, and first grooves 8 are enclosed by adjacent first protruding blocks 7. Referring to fig. 5, a plurality of second protrusions 24 are uniformly and integrally formed on one surface of the second fixing ring 6 facing the first fixing ring 5 at intervals around the central axis of the drill pipe joint, and adjacent second protrusions 24 enclose a second groove 25. The first projection 7 is fittingly inserted into the second recess 25, and the second projection 24 is fittingly inserted into the first recess 8. Referring to fig. 1, in order to prevent the first fixing ring 5 and the second fixing ring 6 from sliding along the axial direction of the drill pipe joint during the operation of the drill pipe joint, the first fixing ring 5 and the second fixing ring 6 are both fixed on the drill pipe joint by the outer hexagon screw 9.

Referring to fig. 3, the external thread 1 is composed of a first external thread 10 and a second external thread 11, and a first plane 12 along the radial direction of the drill pipe joint is arranged between the first external thread 10 and the second external thread 11; the internal thread 3 is composed of a first internal thread 13 and a second internal thread 14, a second plane 15 along the radial direction of the drill rod joint is arranged between the first internal thread 13 and the second internal thread 14, and the first plane 12 is attached to the second plane 15. The internal thread and the external thread are equally divided into two sections, a plane is arranged between the two sections, and the two planes at the two ends of the external thread 1 and the internal thread 3 form three shoulders to share the stress on the drill rod joint, so that the drill rod joint is not easy to damage.

Referring to fig. 4 and 5, in order to fasten the connection between the first fixing ring 5 and the second fixing ring 6, the bottom wall of the first groove 8 fixes the first inserting key 16, and the top of the second protrusion 24 is provided with a second slot 27 matched with the first inserting key 16. Similarly, a second inserting key 26 is fixed on the bottom wall of the second groove 25, and a first slot 17 matched with the second inserting key 26 is formed at the top of the first bump 7. The insertion fit of the first insertion key 16 and the second insertion slot 27 and the insertion fit of the second insertion key 26 and the first insertion slot 17 can increase the contact area between the first fixing ring 5 and the second fixing ring 6, so that the friction force between the first fixing ring 5 and the second fixing ring 6 is increased, and the connection is more tight. It should be noted that the central axes of the first and

second keys

16, 26 are parallel to the central axis of the drill pipe joint.

Referring to fig. 4 and 5, the top end of the first inserting key 16 and the bottom wall of the second slot 27 are fixed with the first magnet block 18 which is mutually adsorbed; the top end of the second inserting key 26 and the bottom wall of the first slot 17 are fixed with a second magnet block 28 which is mutually adsorbed. The arrangement of the first magnet block 18 and the second magnet block 28 further improves the fastening degree of the connection between the first fixing ring 5 and the second fixing ring 6.

Referring to fig. 1, the first fixing ring 5 and the second fixing ring 6 have fixing pieces 19 mounted on the outer surfaces thereof, and the number of the fixing pieces 19 is the same as that of the socket head cap screws 9. One end of the fixing piece 19 is fixed on the first fixing ring 5 or the second fixing ring 6 through a screw 20, and the other end is propped against the side surface of the nut of the outer hexagon screw 9. One end of the fixing piece 19 facing the outer hexagon screw 9 is provided with a flanging 21, and the flanging 21 is abutted against the side surface of the nut of the outer hexagon screw 9. The securing tab 19 is designed to abut against the cap side of the alien screw 9 because: in a complex working environment, the outer hexagon screw 9 can be loosened, and the fixing piece 19 is used for abutting against the outer hexagon screw 9, so that the outer hexagon screw 9 is difficult to rotate, and the first fixing ring 5 and the second fixing ring 6 are firmly fixed on the drill rod joint by the outer hexagon screw 9; the flanging 21 increases the contact area of the fixing piece 19 and the nut of the outer hexagon screw 9, and further prevents the outer hexagon screw 9 from slipping.

Referring to fig. 1, in order to conveniently detach the first fixing ring 5 and the second fixing ring 6, a plurality of circular rings 23 are fixedly connected to the opposite surfaces of the first fixing ring 5 and the second fixing ring 6, when the first fixing ring 5 and the second fixing ring 6 need to be detached, the first fixing ring 5 and the second fixing ring 6 are difficult to directly detach due to interaction force between the first fixing ring 5 and the second fixing ring and friction between the first fixing ring 5 and the second fixing ring and the outer surface of the drill pipe joint, and the first fixing ring 5 and the second fixing ring 6 are relatively easy to detach by hooking the circular rings 23 with tools such as hooks.

The implementation principle of the embodiment 1 is as follows: besides the threaded connection between the male joint 2 and the female joint 4, the first groove 8 on the first fixing ring 5 and the second bump 24 on the second fixing ring 6 are mutually matched, and the first bump 7 on the first fixing ring 5 and the second groove 25 on the second fixing ring 6 are mutually matched, so that the torque resistance of the drill rod joint is improved, and the connection of the drill rod joint is more stable.

Example 2

Different from the embodiment 1, referring to fig. 3, a buffer pad 22 is fixed between the first plane 12 and the second plane 15, and the buffer pad 22 is arranged to buffer the impact force applied to the male joint 2 and the female joint 4 when the drill pipe joint is subjected to an axial force, so that the service life of the drill pipe joint is prolonged.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A tool joint with a multi-shoulder structure comprises a male joint (2) with an external thread (1) and a female joint (4) with an internal thread (3), and is characterized in that: a first fixing ring (5) is coaxially fixed on the male connector (2), a second fixing ring (6) is coaxially connected on the female connector (4), a plurality of first lugs (7) are uniformly arranged on one side, facing the second fixing ring (6), of the first fixing ring (5) at intervals around the central axis of the drill pipe connector, a first groove (8) is defined by adjacent first lugs (7), a plurality of second lugs (24) are uniformly arranged on one side, facing the first fixing ring (5), of the second fixing ring (6) at intervals around the central axis of the drill pipe connector, and a second groove (25) is defined by adjacent second lugs (24); the first projection (7) is fittingly inserted into the second groove (25), and the second projection (24) is fittingly inserted into the first groove (8).

2. The tool joint with the multi-shoulder structure as claimed in claim 1, wherein: the external thread (1) comprises a first external thread (10) and a second external thread (11), and a first plane (12) is arranged between the first external thread (10) and the second external thread (11) along the radial direction of the drill rod joint; the internal thread (3) comprises a first internal thread (13) and a second internal thread (14), a second plane (15) is arranged between the first internal thread (13) and the second internal thread (14) along the radial direction of the drill rod joint, and the first plane (12) is attached to the second plane (15).

3. The tool joint with the multi-shoulder structure as claimed in claim 1, wherein: a first inserting key (16) is arranged at the bottom of the first groove (8), the central axis of the first inserting key (16) is parallel to the central axis of the drill rod joint, and a second inserting groove (27) which is in inserting fit with the first inserting key (16) is arranged on the second convex block (24); a second inserting key (26) is arranged at the bottom of the second groove (25), the central axis of the second inserting key (26) is parallel to the central axis of the drill rod joint, and a first slot (17) which is in inserting fit with the second inserting key (26) is arranged on the first convex block (7).

4. The tool joint with the multi-shoulder structure as claimed in claim 3, wherein: a first magnet block (18) which is mutually adsorbed is fixed at the top end of the first inserting key (16) and the bottom wall of the second inserting groove (27); a second magnet block (28) which is mutually adsorbed is fixed at the top end of the second inserting key (26) and the bottom wall of the first slot (17).

5. The tool joint with the multi-shoulder structure as claimed in claim 1, wherein: the first fixing ring (5) and the second fixing ring (6) are connected with the drill rod joint through outer hexagon screws (9), fixing pieces (19) are fixed on the first fixing ring (5) and the second fixing ring (6), and the fixing pieces (19) abut against the side faces of nuts of the outer hexagon screws (9).

6. The tool joint with the multi-shoulder structure as set forth in claim 5, wherein: one end of the fixing piece (19) facing the outer hexagon screw (9) is provided with a flanging (21), and the flanging (21) is tightly attached to the side face of the nut of the outer hexagon screw (9).

7. The tool joint with the multi-shoulder structure as set forth in claim 2, wherein: a buffer pad (22) is arranged between the first plane (12) and the second plane (15).

8. The tool joint with the multi-shoulder structure as claimed in claim 1, wherein: the first fixing ring (5) and the second fixing ring (6) are fixedly connected with a circular ring (23) on the back-to-back surface.