CN219910676U

CN219910676U - Safety joint for oilfield drilling

Info

Publication number: CN219910676U
Application number: CN202320107890.0U
Authority: CN
Inventors: 张景柱; 张文喆; 张利
Original assignee: Dongying Shengjing Petroleum Equipment Co ltd
Current assignee: Dongying Shengjing Petroleum Equipment Co ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-10-27
Anticipated expiration: 2033-02-03

Abstract

The utility model discloses a safety joint for oilfield drilling, relates to the technical field of safety joints, and aims to solve the problems that in the prior art, a male joint and a female joint of a traditional safety joint are connected by using wide sawtooth threads, and ageing and loosening are easy to occur at a threaded connection part, so that the connection stability of the male joint and the female joint is insufficient. The female joint comprises a female joint body, wherein an inner joint body is fixedly arranged on one side of the female joint body, a spring barrel is fixedly arranged on the outer side of the inner joint body, a second spring is fixedly arranged in the spring barrel, clamping blocks are arranged above the spring barrel, inner grooves are formed in the clamping blocks, the spring barrel is inserted into the inner grooves, the second spring is inserted into the inner grooves and is in welded connection with the clamping blocks, clamping grooves are formed in the male joint body, the clamping grooves correspond to the clamping blocks in position, annular grooves are formed in one end of the outer side of the female joint body, two annular grooves are formed in one end of the outer side of the female joint body, and rubber rings are arranged in the two annular grooves.

Description

Safety joint for oilfield drilling

Technical Field

The utility model relates to the technical field of safety connectors, in particular to a safety connector for oilfield drilling.

Background

The safety joint is a joint which is connected to the lowest part of a drill string during drilling special stratum or special operation in geological drilling and is used for protecting an upper drill rod, is connected by a coarse button square thread, is the link which is easiest to be detached in the whole drill string, can be detached from the safety joint when drilling clamping and burying accidents occur, and can be lifted out of the ground so as to further treat accidents, and can be connected to a fishing tool when the drilling tool in a hole is fished, and can be detached and lifted out of the safety joint conveniently after the fishing tool is clamped;

the safety joint is divided into a male joint and a female joint, but the male joint and the female joint of the traditional safety joint are connected by wide sawtooth threads, and the ageing loosening easily occurs at the threaded connection part, so that the connection stability of the male joint and the female joint is insufficient, and the use stability of the safety joint is affected; therefore, the market is in urgent need to develop a safety joint for oilfield drilling to help people solve the existing problems.

Disclosure of Invention

The utility model aims to provide a safety joint for oilfield drilling, which solves the problems that the male joint and the female joint of the traditional safety joint provided in the background art are connected by wide sawtooth threads, and the threaded connection is easy to age and loose, so that the connection stability of the male joint and the female joint is insufficient.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an oilfield drilling is with safety joint, includes public joint and female joint, one side fixed mounting of female joint has the internal connection body, the outside fixed mounting of internal connection body has a spring section of thick bamboo, the inside fixed mounting of spring section of thick bamboo has the second spring, the top of spring section of thick bamboo is provided with the joint piece, the inside of joint piece is provided with the inner groovy, and the inside of spring section of thick bamboo insert the inner groovy, the second spring insert the inside of inner groovy and with joint piece welded connection, the inside of public joint is provided with the joint recess, and joint recess and joint piece position correspond.

Preferably, one end outside the female joint is provided with annular grooves, two annular grooves are formed, rubber rings are arranged in the two annular grooves, and the rubber rings are located at the joint of the male joint and the female joint.

Preferably, a matching sleeve is fixedly arranged below the clamping block along the outer side of the spring cylinder, and a sealing sleeve is arranged on the inner side of the matching sleeve in an adhesion manner.

Preferably, the inside of male joint is provided with first inner chamber, the inside of first inner chamber is provided with interior body, the one end and the joint piece contact of interior body, the inside of interior body is provided with the steel ball, the inside of interior body is provided with the restriction ring plate, the outside fixed mounting of restriction ring plate has the connecting rod, and the connecting rod is connected with interior body welding machine.

Preferably, a fixed ring plate is fixedly arranged on the outer side of the inner pipe body, a first spring is fixedly arranged on one side of the fixed ring plate, and the first spring is welded with the male connector.

Preferably, one end inside the male connector is provided with a threaded hole, the threaded hole is communicated with the first inner cavity, a threaded boss is installed on one side of the female connector, the female connector and the threaded boss are arranged into an integrated structure, and a second inner cavity is arranged inside the female connector.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the second springs are connected to the bottoms of the clamping blocks, so that when the male connector and the female connector are connected, the male connector is directly sleeved on the female connector, and under the elastic action of the second springs, the clamping blocks can automatically elastically push into the clamping grooves of the male connector to limit the male connector, so that the male connector and the female connector can be firmly connected, the convenience of connection of the male connector and the female connector is improved, and the clamping blocks are provided with a plurality of clamping blocks, so that the male connector and the female connector can be firmly connected, and the practicability is improved.

2. According to the utility model, through the arrangement of the rubber rings, two rubber rings are arranged, and the rubber rings are positioned at the joint gaps of the male connector and the female connector, so that the connection of the male connector and the female connector can be sealed, and through the two arranged rubber rings, two layers of sealing layers are formed, so that the sealing stability of the male connector and the female connector is further improved.

3. According to the utility model, through the arrangement of the steel ball and the inner pipe body, the inner bevel opening matched with the inclined surface of the side part of the clamping block is arranged on one side of the inner pipe body close to the clamping block, so that when the male joint and the female joint are required to be separated, the steel ball is placed into the male joint through the drill rod, then the liquid is conveyed for boosting, and along with the increase of pressure, the steel ball presses the inner pipe body to move, so that the clamping block can be pressed, the clamping block is separated from the clamping groove, the male joint and the female joint are convenient and quick to separate, all the drill rods can be lifted out of the ground from the safety joint when the drilling clamping and burying accidents occur, and the practicability is improved.

Drawings

FIG. 1 is a schematic illustration of a safety joint for oilfield drilling of the present utility model;

FIG. 2 is a cross-sectional view of a male connector and female connector of the present utility model;

FIG. 3 is an enlarged schematic view of the portion A of the present utility model;

fig. 4 is an enlarged schematic view of the B site of the present utility model.

In the figure: 1. a male connector; 2. a female joint; 3. a threaded boss; 4. a threaded hole; 5. a first lumen; 6. a second lumen; 7. a steel ball; 8. a limiting ring plate; 9. a first spring; 10. a fixed ring plate; 11. an inner tube body; 12. an inner joint body; 13. a clamping block; 14. a clamping groove; 15. a second spring; 16. a spring cylinder; 17. a rubber ring; 18. a matching sleeve; 19. sealing sleeve; 20. an inner groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, an embodiment of the present utility model is provided: the utility model provides an oilfield drilling safety joint, including public joint 1 and female joint 2, one side fixed mounting of female joint 2 has internal connection body 12, the outside fixed mounting of internal connection body 12 has a spring section of thick bamboo 16, the inside fixed mounting of spring section of thick bamboo 16 has second spring 15, the top of spring section of thick bamboo 16 is provided with joint piece 13, one side of joint piece 13 is provided with the inclined plane, the dismouting of public joint 1 and female joint 2 of being convenient for, spring section of thick bamboo 16 is provided with a plurality of, make joint piece 13 be provided with a plurality of, public joint 1 and female joint 2 can firm the connection, the inside of joint piece 13 is provided with inner groove 20, and spring section of thick bamboo 16 inserts the inside of inner groove 20, the inside of second spring 15 inserts the inside and with joint piece 13 welded connection, the inside of public joint 1 is provided with joint groove 14, and joint groove 14 corresponds with joint piece 13 position.

During the use, through directly overlapping the male joint 1 on the female joint 2, under the elastic action of second spring 15, joint piece 13 can be automatic elasticity jack-in the joint recess 14 of male joint 1, restrict the male joint 1, thereby make male joint 1 and female joint 2 can firm the connection, male joint and female joint that has solved traditional safety joint are with wide sawtooth threaded connection, ageing not hard up appears easily in threaded connection department, make male joint and female joint connect the problem that the steadiness is not enough, the convenience that male joint 1 and female joint 2 connect has been improved.

Further, the one end in the female joint 2 outside is provided with the annular, and the annular is provided with two, and the inside of two annular all is provided with rubber ring 17, and rubber ring 17 is located the junction of male joint 1 and female joint 2, and the joint surface of male joint 1 and female joint 2 is the annular inclined plane, is favorable to the inseparable laminating of male joint 1 and female joint 2.

Further, the lower side of the clamping block 13 is fixedly provided with a matching sleeve 18 along the outer side of the spring cylinder 16, the inner side of the matching sleeve 18 is fixedly provided with a sealing sleeve 19 in an adhesive mode, and the sealing sleeve 19 is attached to the spring cylinder 16, so that the sealing performance of the spring cylinder 16 is improved.

Further, the inside of male joint 1 is provided with first inner chamber 5, the inside of first inner chamber 5 is provided with interior body 11, the one end and the joint piece 13 contact of interior body 11, one side that interior body 11 is close to joint piece 13 is provided with the interior bevel connection of cooperation joint piece 13 lateral part inclined plane, be convenient for make the one end and the joint piece 13 laminating of interior body 11, the inside of interior body 11 is provided with steel ball 7, the inside of interior body 11 is provided with restriction ring plate 8, the setting of restriction ring plate 8 is convenient for restrict steel ball 7, the outside fixed mounting of restriction ring plate 8 has the connecting rod, and the connecting rod is connected with interior body 11 welding machine, thereby when taking place the card and boring the accident, put into male joint 1 with the steel ball 7 through the drilling rod, carry the liquid to carry out the pressure boost again, along with the increase of pressure, the steel ball is pressed interior body 11 and is moved, press joint piece 13 is followed in the joint groove 14 and is broken away, rotate again and pulling drilling rod, make male joint 1 and female joint 2 separate, can be followed the safety joint department and be convenient to take out the whole ground, the work of salvaging the bit position of being convenient for later stage.

Further, the outside fixed mounting of interior body 11 has fixed ring board 10, and fixed ring board 10's one side fixed mounting has first spring 9, and first spring 9 and public joint 1 welded connection, and the setting of first spring 9 has improved the ability of the elastic displacement of interior body 11, is favorable to when separating public joint 1 and female joint 2, the automatic re-setting of interior body 11.

Further, the inside one end of public joint 1 is provided with screw hole 4, and the safety joint and the drilling rod of being convenient for are connected, and screw hole 4 and first inner chamber 5 intercommunication, and screw thread boss 3 is installed to one side of female joint 2, and safety joint and drill bit of being convenient for, and female joint 2 and screw thread boss 3 set up as an organic whole structure, and the inside of female joint 2 is provided with second inner chamber 6, and second inner chamber 6 and first inner chamber 5 intercommunication make things convenient for the circulation of drilling in-process liquid.

Working principle: during the use, overlap the pin joint 1 on the female joint 2, under the elasticity effect of second spring 15, joint piece 13 can be automatic elasticity jack-in the joint recess 14 of pin joint 1, restrict pin joint 1, thereby make pin joint 1 and female joint 2 can stable connection, then be connected female joint 2 through screw boss 3 and drill bit, be connected pin joint 1 through screw hole 4 and drilling rod, when the brill is stuck, buries the accident, put into pin joint 1 through the drilling rod with steel ball 7, carry liquid to carry the pressure boost again, along with the increase of pressure, the steel ball is pressed inner tube 11 and is removed, press joint piece 13, make joint piece 13 break away from in joint recess 14, it is convenient to rotate and pull the drilling rod again, make pin joint 1 and female joint 2 separate, can take out ground with whole drilling rod from the safety joint department.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an oil field is safety joint for well drilling, includes male joint (1) and female joint (2), its characterized in that: one side fixed mounting of female joint (2) has internal connection body (12), the outside fixed mounting of internal connection body (12) has spring section of thick bamboo (16), the inside fixed mounting of spring section of thick bamboo (16) has second spring (15), the top of spring section of thick bamboo (16) is provided with joint piece (13), the inside of joint piece (13) is provided with indent (20), and the inside of spring section of thick bamboo (16) insert indent (20), the inside of indent (20) is inserted and with joint piece (13) welded connection to second spring (15), the inside of male joint (1) is provided with joint recess (14), and joint recess (14) and joint piece (13) position correspondence.

2. The safety joint for oilfield drilling of claim 1, wherein the safety joint comprises: one end in the outer side of the female connector (2) is provided with annular grooves, two annular grooves are formed, rubber rings (17) are arranged in the two annular grooves, and the rubber rings (17) are located at the joint of the male connector (1) and the female connector (2).

3. The safety joint for oilfield drilling of claim 1, wherein the safety joint comprises: the lower part of the clamping block (13) is fixedly provided with a matching sleeve (18) along the outer side of the spring cylinder (16), and the inner side of the matching sleeve (18) is adhered and provided with a sealing sleeve (19).

4. The safety joint for oilfield drilling of claim 1, wherein the safety joint comprises: the inside of male joint (1) is provided with first inner chamber (5), the inside of first inner chamber (5) is provided with interior body (11), the one end and the joint piece (13) contact of interior body (11), the inside of interior body (11) is provided with steel ball (7), the inside of interior body (11) is provided with restriction annular plate (8), the outside fixed mounting of restriction annular plate (8) has the connecting rod, and the connecting rod is connected with interior body (11) welding machine.

5. The safety joint for oilfield drilling of claim 4, wherein the safety joint comprises: the outer side of the inner pipe body (11) is fixedly provided with a fixed ring plate (10), one side of the fixed ring plate (10) is fixedly provided with a first spring (9), and the first spring (9) is in welded connection with the male connector (1).

6. The safety joint for oilfield drilling of claim 5, wherein the safety joint comprises: the utility model discloses a female joint, including female joint (2), screw boss (3) are installed to female joint (2), screw boss (3) are installed into a body structure, female joint (2)'s inside is provided with second inner chamber (6) with screw hole (4), screw hole (4) and first inner chamber (5) intercommunication are provided with to the inside one end of male joint (1).