CN217233434U

CN217233434U - Multi-seal special threaded sleeve

Info

Publication number: CN217233434U
Application number: CN202220991710.5U
Authority: CN
Inventors: 张宏文; 周洪; 吴春迪
Original assignee: Wuxi Seamless Oil Pipe Co Ltd
Current assignee: Wuxi Seamless Oil Pipe Co Ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-08-19
Anticipated expiration: 2032-04-24

Abstract

The utility model discloses a multi-seal special thread casing, which relates to the technical field of thread casing, and comprises a first casing body and a second casing body, wherein the outer surfaces of the first casing body and the second casing body are sleeved with a connecting hoop, the outer surfaces of the first casing body and the second casing body are fixedly connected with a first sealing ring, the side surface of the connecting hoop is provided with a first sealing groove which is in sliding connection with the surface of the first sealing ring, the multi-seal special thread casing is characterized in that the connecting ring has an isosceles trapezoid cross section, the opposite sides of the first butt ring and the second butt ring are provided with inclined planes which are mutually matched, the second sealing groove is mutually matched with the second sealing ring, the first sealing groove is mutually matched with the first sealing ring, so that the device has multi-seal performance, the seal performance of the device is improved to a certain extent, and the device can transport materials more smoothly, the device can be used more conveniently by workers.

Description

Multi-seal special threaded sleeve

Technical Field

The utility model relates to a threaded sleeve technical field, in particular to multiple sealed special threaded sleeve.

Background

The API standard oil casing is the most commonly used oil casing in China and is the leading product of each oil casing production plant in China, the product is mature in technology and easy to process, however, the oil casing still has some inherent defects in structure, such as low screwing efficiency, poor torsion resistance, easy thread gluing and the like, so that the use of the API oil casing is limited, along with the rapid rise of the world demand for fossil energy and the annual reduction of the oil exploitation amount, the current oil exploitation field is gradually developed towards the exploitation directions of deep wells, ultra-deep wells, high-pressure oil and gas wells, heavy oil thermal exploitation wells, directional wells and the like, and therefore, increasingly rigorous technical requirements are provided for sealing between oil pipes.

Some present screw thread sleeve pipes are standard circle screw thread and buttress thread oil casing pipe, but because some present screw thread sleeve pipes just seal up the screw thread sleeve pipe through the screw thread for screw thread sleeve pipe's leakproofness is single, thereby easily make the outside abominable environment of oil gas well, the influence that causes the screw thread sleeve pipe, and make the screw thread sleeve pipe the condition that the gas tightness reduces appear, make the pipeline receive the influence to the transportation of material, thereby make the screw thread sleeve pipe can not satisfy the demand of exploiting the abominable oil gas well of environmental condition at gas tightness.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a multiple sealed special thread bush, can solve the single problem of thread bush's leakproofness.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a multiple seal special thread bush, including first cover body and second cover body, the connection hoop has been cup jointed with the surface of second cover body to first cover body, the first sealing ring of the equal fixedly connected with in surface of first cover body and second cover body, the first seal groove with first sealing ring surface sliding connection is seted up to the side of connection hoop, the equal fixedly connected with connecting block in opposite side of first cover body and second cover body, the opposite side of two connecting blocks is the first butt joint ring of fixedly connected with and the second butt joint ring respectively, the internal surface of connection hoop seted up with the connecting block, the mounting groove of being connected is rotated to first cover body and second cover body surface, the surface of first cover body and second cover body all is provided with the first screw thread that the cross-section is isosceles triangle.

Preferably, the inside of mounting groove is seted up with the spread groove of first threaded surface mutually supporting, the surface of connecting block is provided with the second screw thread that the cross-section is obtuse triangle, the inside of mounting groove is seted up with the spread groove of second threaded surface mutually supporting.

Preferably, the cross sections of the first sealing groove and the first sealing ring are both L-shaped, and the connecting block is in a circular truncated cone shape.

Preferably, the opposite sides of the first butt joint ring and the second butt joint ring are both provided with an inclined surface, the inner wall of the connecting hoop is fixedly connected with the connecting ring, and the section of the connecting ring is in an isosceles trapezoid shape.

Preferably, one side of the first butt joint ring close to the second butt joint ring is fixedly connected with a second sealing ring, one side of the second butt joint ring close to the first butt joint ring is provided with a second sealing groove in sliding connection with the surface of the second sealing ring, and the cross sections of the second sealing groove and the second sealing ring are semicircular.

Preferably, the first sealing ring comprises an elastic frame, a protective layer, a heat-resistant layer and a wear-resistant anticorrosive layer, one side of the protective layer, which is close to the elastic frame, is fixedly connected with the surface of the elastic frame, one side of the heat-resistant layer, which is close to the protective layer, is fixedly connected with the surface of the protective layer, and one side of the wear-resistant anticorrosive layer, which is close to the heat-resistant layer, is fixedly connected with the surface of the heat-resistant layer.

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

(1) this multiple seal special thread sleeve pipe, through the go-between for the cross-section all set up the mutually supporting on inclined plane for isosceles trapezoid and first butt joint ring and second butt joint ring opposite side, the mutually supporting of second seal groove and second sealing ring, mutually supporting of first seal groove and first sealing ring, make the device have multiple leakproofness, make the leakproofness of device obtain certain promotion, and make the device can transport the material more smoothly, make the operative installations that the staff can be more convenient.

(2) This multiple sealing special thread bush has certain elasticity through elastic frame and inoxidizing coating, makes the contact of first sealing ring and first seal groove inseparabler to a certain extent, makes the leakproofness of device better, and through the inoxidizing coating, heat-resistant layer and wear-resisting anticorrosive coating, makes the butt joint department of first sleeve body and second sleeve body can obtain better protection, and makes the leakproofness of device obtain certain promotion to a certain extent, makes the life of device obtain the extension.

Drawings

The invention is further described below with reference to the following figures and examples:

fig. 1 is a schematic structural view of the threaded bushing of the present invention;

fig. 2 is a schematic cross-sectional view of the connection hoop of the present invention;

FIG. 3 is an enlarged schematic view of A in FIG. 2 according to the present invention;

fig. 4 is a schematic view of the first sealing ring of the present invention.

Reference numerals: 1. a first sleeve body; 2. a connecting hoop; 3. a second sleeve body; 4. a first seal ring; 401. an elastic frame; 402. a protective layer; 403. a thermal barrier layer; 404. a wear-resistant anticorrosive layer; 5. a first seal groove; 6. a first thread; 7. connecting blocks; 8. a connecting ring; 9. a first docking ring; 10. a second seal ring; 11. a second seal groove; 12. a second docking ring; 13. mounting grooves; 14. a second thread.

Detailed Description

Referring to fig. 1-3, the present invention provides a technical solution: a multi-seal special threaded sleeve comprises a first sleeve body 1 and a second sleeve body 3, wherein the outer surfaces of the first sleeve body 1 and the second sleeve body 3 are sleeved with a connecting hoop 2, the positions of the first sleeve body 1 and the second sleeve body 3 can be fixed through the connecting hoop 2, the outer surfaces of the first sleeve body 1 and the second sleeve body 3 are fixedly connected with a first sealing ring 4, the side surface of the connecting hoop 2 is provided with a first sealing groove 5 in surface sliding connection with the first sealing ring 4, the cross sections of the first sealing groove 5 and the first sealing ring 4 are L-shaped, the opposite sides of the first sleeve body 1 and the second sleeve body 3 are fixedly connected with a connecting block 7, the connecting block 7 is in a circular truncated cone shape, the opposite sides of the two connecting blocks 7 are respectively and fixedly connected with a first butt ring 9 and a second butt ring 12, and the opposite sides of the first butt ring 9 and the second butt ring 12 are tightly attached to each other, make the leakproofness of

first sleeve body

1 and 3 junctions of second sleeve body obtain certain promotion, make the apparatus that the staff can use more smoothly, connect the internal surface of hoop 2 seted up with connecting block 7, the mounting groove 13 that

first sleeve body

1 and 3 surface rotations of second sleeve body are connected, first sleeve body 1 all is provided with the first screw thread 6 that the cross-section is isosceles triangle with the surface of second sleeve body 3, the spread groove of mutually supporting with 6 surfaces of first screw thread is seted up to the inside of mounting groove 13, it is more convenient to make the installation of first sleeve body 1 and second sleeve body 3.

Further, the outer surface of the connecting block 7 is provided with a second thread 14 with an obtuse triangle section, and a connecting groove matched with the surface of the second thread 14 is formed in the mounting groove 13.

Further, the opposite side of first butt joint ring 9 and second butt joint ring 12 all is provided with the inclined plane, connect the inner wall fixedly connected with go-between 8 of hoop 2, the cross-section of go-between 8 is isosceles trapezoid, be isosceles trapezoid for the cross-section through go-between 8 and all set up the cooperation on inclined plane for isosceles trapezoid and first butt joint ring 9 and second butt joint ring 12 opposite side, make first butt joint ring 9 laminate with go-between 8's surface with second butt joint ring 12 can be inseparabler, make the leakproofness of first sleeve body 1 and second sleeve body 3 junction obtain certain promotion, thereby make the operative installations that the staff can be more convenient.

Further, one side of the first butt joint ring 9 close to the second butt joint ring 12 is fixedly connected with a second sealing ring 10, one side of the second butt joint ring 12 close to the first butt joint ring 9 is provided with a second sealing groove 11 in surface sliding connection with the second sealing ring 10, the cross sections of the second sealing groove 11 and the second sealing ring 10 are semicircular, and the sealing performance of the joint of the first sleeve body 1 and the second sleeve body 3 is improved to a certain extent through the mutual matching of the second sealing groove 11 and the second sealing ring 10.

Referring to fig. 4, further, the first sealing ring 4 includes an elastic frame 401, a protection layer 402, a heat-resistant layer 403, and a wear-resistant and corrosion-resistant layer 404, one side of the protection layer 402 close to the elastic frame 401 is fixedly connected to the surface of the elastic frame 401, the elastic frame 401 is made of rubber or other elastic material, the protection layer 402 is made of polyurethane foam, the elastic frame 401 can be better protected by the polyurethane foam with low density and heat preservation, one side of the heat-resistant layer 403 close to the protection layer 402 is fixedly connected to the surface of the protection layer 402, the heat-resistant layer 403 is made of a flame-retardant PET film, so that the first sealing ring 4 has a certain heat resistance, one side of the wear-resistant and corrosion-resistant layer 404 close to the heat-resistant layer 403 is fixedly connected to the surface of the heat-resistant layer, the wear-resistant and corrosion-resistant layer 404 is made of a teflon film, so that the corrosion resistance and wear resistance of the first sealing ring 4 are improved to a certain extent, thereby the service life of the first sealing ring 4 is improved to a certain extent.

Have certain elasticity through elastic frame 401 and inoxidizing coating 402, make the contact of first sealing ring 4 and first seal groove 5 inseparabler to a certain extent, make the leakproofness of device better to make the butt joint department of first sleeve body 1 and second sleeve body 3 can obtain better protection, and make the leakproofness of device obtain certain promotion to a certain extent, make the life of device obtain the extension.

The working principle is as follows: this multiple sealed special thread bush, mutually support through first screw thread 6 and second screw thread 14 when using, it is more convenient to make the installation of first body 1 and second body 3, simultaneously through go-between 8 be isosceles trapezoid for the cross-section all set up the cooperation each other on inclined plane with first butt joint ring 9 and second butt joint ring 12 opposite side, second seal groove 11 and second sealing ring 10 mutually support, mutually support of first seal groove 5 and first sealing ring 4, make the device have multiple leakproofness, make the leakproofness of device obtain certain promotion, simultaneously through inoxidizing coating 402, heat-resistant layer 403 and wear-resisting anticorrosive coating 404, make the butt joint department of first body 1 and second body 3 can obtain better protection.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The utility model provides a special thread bush of multiple seal, includes first cover body (1) and second cover body (3), its characterized in that: the outer surfaces of the first sleeve body (1) and the second sleeve body (3) are sleeved with a connecting hoop (2), the outer surfaces of the first sleeve body (1) and the second sleeve body (3) are fixedly connected with a first sealing ring (4), the side surface of the connecting hoop (2) is provided with a first sealing groove (5) in surface sliding connection with the first sealing ring (4), the opposite sides of the first sleeve body (1) and the second sleeve body (3) are fixedly connected with connecting blocks (7), the opposite sides of the two connecting blocks (7) are respectively fixedly connected with a first butt ring (9) and a second butt ring (12), the inner surface of the connecting hoop (2) is provided with the connecting blocks (7), the mounting groove (13) that first bushing body (1) and second bushing body (3) surface rotate to be connected, the surface of first bushing body (1) and second bushing body (3) all is provided with first screw thread (6) that the cross-section is isosceles triangle.

2. The multiple seal special thread bushing according to claim 1, wherein: the connecting groove that mutually supports with first screw thread (6) surface is seted up to the inside of mounting groove (13), and the surface of connecting block (7) is provided with second screw thread (14) that the cross-section is obtuse triangle, and the connecting groove that mutually supports with second screw thread (14) surface is seted up to the inside of mounting groove (13).

3. The multiple seal special thread bushing according to claim 2, wherein: the cross sections of the first sealing groove (5) and the first sealing ring (4) are both L-shaped, and the connecting block (7) is in a circular truncated cone shape.

4. A multiple seal special thread bushing according to claim 3, wherein: inclined planes are arranged on the opposite sides of the first butt joint ring (9) and the second butt joint ring (12), the inner wall of the connecting hoop (2) is fixedly connected with the connecting ring (8), and the section of the connecting ring (8) is isosceles trapezoid.

5. The multiple seal special thread bushing according to claim 4, wherein: one side fixedly connected with second sealing ring (10) that first butt joint ring (9) is close to second butt joint ring (12), second butt joint ring (12) are close to one side of first butt joint ring (9) offer with second sealing ring (10) surperficial sliding connection's second seal groove (11), second seal groove (11) are semi-circular with the cross-section of second sealing ring (10).

6. The multiple seal special thread bushing according to claim 5, wherein: the first sealing ring (4) comprises an elastic frame (401), a protective layer (402), a heat-resistant layer (403) and a wear-resistant anticorrosive layer (404), wherein one side, close to the elastic frame (401), of the protective layer (402) is fixedly connected with the surface of the elastic frame (401), one side, close to the protective layer (402), of the heat-resistant layer (403) is fixedly connected with the surface of the protective layer (402), and one side, close to the heat-resistant layer (403), of the wear-resistant anticorrosive layer (404) is fixedly connected with the surface of the heat-resistant layer (403).