Search

CN-121993048-A - Pipe end pipe body double-seal thread sleeve head suitable for multidirectional well conditions

CN121993048ACN 121993048 ACN121993048 ACN 121993048ACN-121993048-A

Abstract

The invention relates to the technical field of connecting parts, and discloses a pipe end pipe body double-seal thread sleeve head suitable for a multidirectional well condition, which comprises a thread sleeve head and a pipe body, wherein one end of the pipe body, which is close to the thread sleeve head, is provided with a connecting mechanism, a metal sealing piece is arranged in the thread sleeve head, the connecting mechanism comprises a thread connector, the thread connector is fixedly connected with the pipe body, and the thread connector is in a circular truncated cone shape; the pipe comprises a threaded connector, a cone frustum sealing surface, a ball sealing surface and a reinforcing component, wherein the cone frustum sealing surface is arranged on the threaded connector, the ball sealing surface is arranged on the pipe body, and the reinforcing component is arranged at one end, far away from the pipe body, of the threaded connector. According to the invention, a first rigid sealing line is formed by the conical frustum sealing surface and the spherical sealing surface of the connecting mechanism, the radial leakage channel of fluid is blocked by utilizing the fitting characteristic of the conical frustum threaded connector, the sealing effect of the device is improved, and the device is suitable for the severe sealing requirements of complex well conditions such as a directional well, a horizontal well and the like.

Inventors

  • LIU GUANGHUA
  • LIU JIAMING
  • SU ZHENGQING
  • WANG CHUNKAI
  • SONG KANG
  • TAO HONGYU

Assignees

  • 江苏常宝普莱森钢管有限公司

Dates

Publication Date
20260508
Application Date
20260331

Claims (10)

  1. 1. The pipe end pipe body double-seal thread sleeve head suitable for the multidirectional well condition comprises a thread sleeve head (1) and a pipe body (2), and is characterized in that one end, close to the thread sleeve head (1), of the pipe body (2) is provided with a connecting mechanism (3), a metal sealing piece (4) is arranged in the thread sleeve head (1), and the connecting mechanism (3) comprises: the threaded connector (31) is fixedly connected with the pipe body (2), and the threaded connector (31) is in a truncated cone shape; A truncated cone sealing surface (32), wherein the truncated cone sealing surface (32) is arranged on the threaded connector (31); A ball sealing surface (33), the ball sealing surface (33) being arranged on the pipe body (2); The reinforcing component (34) is arranged at one end of the threaded connector (31) away from the pipe body (2).
  2. 2. The double-seal thread bushing of a pipe end pipe body suitable for a multidirectional well condition according to claim 1, wherein the reinforcing component (34) comprises a connecting ring (341), a guide rod (342) and a connecting component (343), the connecting ring (341) is fixedly connected with the guide rod (342), and the connecting component (343) is arranged on one side, far away from the guide rod (342), of the connecting ring (341).
  3. 3. The double-seal thread sleeve head of a pipe end body applicable to a multidirectional well condition according to claim 2, wherein a groove (311) is formed in one side, close to a connecting ring (341), of the threaded connector (31), a connecting spring is embedded in the groove (311) and connected with the connecting ring (341), a guide rod (342) is slidably connected with the groove (311), and the connecting ring (341) is separated from the threaded connector (31) in an initial state of the connecting spring.
  4. 4. The double-seal thread bushing head of a pipe end pipe body suitable for a multidirectional well condition according to claim 2, wherein the connecting assembly (343) comprises a fixed ring (3431), a sliding block (3433) and an inserting block (3434), the fixed ring (3431) is rotationally connected with the connecting ring (341), a plurality of groups of inner grooves (3432) are formed in the fixed ring (3431), the sliding block (3433) is slidably connected in the inner grooves (3432), the inserting block (3434) is fixedly connected with the sliding block (3433), and the sliding block (3433) is elastically connected with the inner grooves (3432) through a reset spring.
  5. 5. The double-seal thread sleeve head of a pipe end pipe body suitable for a multidirectional well condition according to claim 4, wherein a socket (101) is formed in the thread sleeve head (1), the edge of the socket (101) and the end of an inserting block (3434) are arc-shaped, and the socket (101) is matched with the inserting block (3434).
  6. 6. A double-seal thread sleeve for a pipe end body adapted for use in a multi-directional well condition as defined in claim 4 wherein said connection ring (341) is notched (3411).
  7. 7. A double-seal thread sleeve for a pipe end body adapted for use in a multi-directional well condition as claimed in claim 6, wherein said retaining ring (3431) has a projection (3435) resiliently attached to a side thereof adjacent said recess (3411).
  8. 8. A dual seal thread running nose for a tubular end body adapted for use in a multi-directional well condition as set forth in claim 7 wherein said recess (3411) mates with a protrusion (3435), said protrusion (3435) being hemispherical.
  9. 9. A pipe end pipe body double-seal thread sleeve head suitable for a multidirectional well condition according to claim 1, wherein the metal sealing element (4) is embedded in the thread sleeve head (1), and the metal sealing element (4) is in interference fit with the ball sealing surface (33).
  10. 10. A pipe end body double seal thread running nipple suitable for use in a multi-directional well condition according to claim 9, wherein the metal seal (4) is resilient.

Description

Pipe end pipe body double-seal thread sleeve head suitable for multidirectional well conditions Technical Field The invention relates to the technical field of connecting parts, in particular to a pipe end pipe body double-seal thread sleeve head suitable for a multidirectional well condition. Background The double-seal threaded sleeve head is suitable for the pipe end and pipe body of a multi-directional well condition, is a key connecting component in the field of oil and gas drilling and production, and has the core functions of realizing reliable connection of the pipe end and the pipe body of an oil sleeve pipe, blocking leakage of drilling fluid and stratum fluid and bearing multi-directional composite loads such as axial pulling force, radial pressure, bending torque and the like in a well. The application scene covers complex well conditions such as directional wells, horizontal wells, ultra-deep wells and the like. The traditional joint relies on single thread seal or single-channel metal seal, the sealing surface is easy to slide relatively under the action of multidirectional load, so that the contact pressure is fluctuated, the sealing specific pressure is obviously reduced, the gas seal failure probability is greatly improved, meanwhile, the expansion difference of steel and screw grease in a high-temperature environment can further weaken the contact pressure of the sealing surface and exacerbate the leakage risk, and the double-seal thread sleeve head of the pipe end pipe body suitable for the multidirectional well condition is provided for solving the problems. Disclosure of Invention In order to make up for the defects, the invention provides a pipe end pipe body double-seal thread sleeve head suitable for a multidirectional well condition, and aims to solve the problems that the traditional pipe end pipe body thread sleeve head in the prior art depends on a single seal structure, and under the action of composite loads such as axial tension, radial pressure, bending torque and the like of a multidirectional well condition such as a directional well, a horizontal well and the like, the seal surface is easy to slide relatively, so that contact pressure fluctuation and seal specific pressure are obviously reduced, and the gas seal failure probability is greatly improved. In order to achieve the purpose, the invention adopts the following technical scheme that the pipe end pipe body double-seal thread sleeve head suitable for the multidirectional well condition comprises a thread sleeve head and a pipe body, wherein one end of the pipe body close to the thread sleeve head is provided with a connecting mechanism, a metal sealing piece is arranged in the thread sleeve head, and the connecting mechanism comprises: The threaded connector is fixedly connected with the pipe body and is in a truncated cone shape; The cone frustum sealing surface is arranged on the threaded connector; the ball sealing surface is arranged on the pipe body; The reinforcing component is arranged at one end of the threaded connector, far away from the pipe body, and is connected with the pipe body through the threaded sleeve head, the threaded connector is in threaded connection with the threaded sleeve head, after the threaded connector is completely connected with the threaded sleeve head, the conical frustum sealing surface is tightly abutted with the inner wall of the threaded sleeve head, and the ball sealing surface is tightly abutted with the inner wall of the threaded sleeve head to form a rigid seal. As a further description of the above technical solution: The reinforcing component comprises a connecting ring, a guide rod and a connecting component, wherein the connecting ring is fixedly connected with the guide rod, and the connecting component is arranged on one side, far away from the guide rod, of the connecting ring. As a further description of the above technical solution: the screw thread connector is close to one side of go-between and is seted up flutedly, inlay in the recess and install coupling spring, and coupling spring is connected with the go-between, guide arm and recess sliding connection, when coupling spring initial state, go-between and screw thread connector phase separation, when screw thread connector does not complete threaded connection go into the screw thread pullover, screw thread connector rotates and can drive go-between and coupling assembling synchronous rotation, after coupling assembling and screw thread pullover looks butt, screw thread connector can continue to be connected into in the screw thread pullover, coupling spring is compressed, until go-between and screw thread connector butt, make screw thread connector can complete connection go into in the screw thread pullover. As a further description of the above technical solution: The connecting assembly comprises a fixed ring, a sliding block and an inserting block, wherein the fixed ring is rotationally connected with the