Search

CN-120776943-B - Air-tight connection structure of special knot of oil casing screw thread

CN120776943BCN 120776943 BCN120776943 BCN 120776943BCN-120776943-B

Abstract

The invention discloses an airtight connection structure of an oil casing thread special buckle, which comprises an air conveying element, a connecting element, a fixing element, an opening part and an air bag ring, wherein the air conveying element comprises an air conveying pipe and a movable threaded pipe arranged on the air conveying pipe, the connecting element comprises a fixed threaded part arranged on the outer wall of the movable threaded pipe, an inflating part and a filling part arranged on the fixed threaded part, the fixing element comprises a fixed pipe arranged between the fixed threaded parts, an adjusting part, a sliding part and a limiting part arranged in the fixed pipe, and the opening part arranged on the limiting part.

Inventors

  • ZHANG ZHENG
  • CHEN ZHONG
  • WANG LINLIN

Assignees

  • 江苏诚德钢管股份有限公司

Dates

Publication Date
20260508
Application Date
20250826

Claims (6)

  1. 1. The airtight connection structure of the special thread buckle of the oil sleeve is characterized by comprising two gas transmission elements (1), wherein the gas transmission elements (1) comprise gas transmission pipes (11) and movable thread pipes (12) fixedly arranged on the gas transmission pipes (11); The connecting elements (2) comprise fixed thread parts (21) which are arranged on the outer wall of the movable thread pipe (12) in a threaded mode, air charging parts (22) which are arranged on the lower wall of the fixed thread parts (21) and two filling parts (23) which are arranged on the side walls of the fixed thread parts (21); A fixing element (3), wherein the fixing element (3) comprises a fixing tube (31) fixedly arranged between the fixing thread parts (21), an adjusting part (32) arranged in the fixing tube (31), four sliding parts (33) arranged in the fixing tube (31), four limiting parts (34) arranged in the fixing tube (31), and an opening part (35) arranged on the limiting parts (34); The movable threaded pipe (12) drives the limiting part (34) to move, the limiting part (34) and the adjusting part (32) are matched to limit the movable threaded pipe (12), the limiting part (34) drives the two filling parts (23) to open to limit the movable threaded pipe (12), the filling parts (23) are opened to fill the inflating part (22); the fixed thread part (21) comprises a fixed thread pipe (212) which is arranged on the outer wall of the movable thread pipe (12) in a threaded manner, and a connecting pipe (211) which is fixedly arranged on the outer wall of the fixed thread pipe (212); The inflating part (22) comprises an air vent groove (221) penetrating through the lower wall of the fixed thread pipe (212), an air delivery groove (222) arranged in the lower wall of the connecting pipe (211), and an air bag ring (223) fixedly arranged on the side wall of the connecting pipe (211); The filling part (23) comprises filling grooves (231) which are arranged on two sides of the side wall of the fixed thread pipe (212) in a penetrating way, storage grooves (233) which are arranged on two sides of the side wall of the connecting pipe (211) and communication grooves (232) which are arranged on two sides of the side wall of the connecting pipe (211); The filling part (23) further comprises a sealing plate (234) fixedly arranged below the storage groove (233), and a separation plate (235) slidingly arranged below the storage groove (233); The adjusting part (32) comprises a fixed ring (321) fixedly arranged in the fixed pipe (31), two sliding rings (323) slidably arranged in the fixed pipe (31), the two sliding rings (323) are arranged on two sides of the fixed ring (321), and the two sliding rings (323) are fixedly connected through a connecting rod (322); The sliding part (33) comprises a sliding groove (331) arranged on the side wall of the fixed pipe (31), a sliding block (332) arranged in the sliding groove (331) in a sliding manner, a connecting plate (333) fixedly arranged on the side wall of the sliding block (332), a fixed plate (334) fixedly arranged on the connecting plate (333), and the sliding blocks (332) arranged on two sides of the same sliding ring (323); the limiting part (34) comprises a limiting block (343) arranged in the fixed pipe (31), the fixed plates (334) are connected with the limiting block (343) through telescopic sleeves (341), the fixed plates (334) are elastically connected with the limiting block (343) through springs (342), and the side wall, close to the movable threaded pipe (12), of the limiting block (343) is an inclined surface; The opening part (35) comprises a vertical rod (351) fixedly arranged at the telescopic end of the telescopic sleeve (341), and an opening groove (354) arranged on the side wall of the sliding groove (331).
  2. 2. The airtight connection structure of the special thread button for oil casing according to claim 1, wherein a filter screen is arranged on the ventilation groove (221), and the ventilation groove (221) is communicated with the air bag ring (223) through the air transmission groove (222).
  3. 3. The airtight connection structure of the special thread button for oil casing according to claim 2, wherein the storage groove (233) is arranged above the communication groove (232), and is communicated with the filling groove (231) through the communication groove (232), and the two storage grooves (233) are respectively stored with expanded rubber particles and a water source.
  4. 4. The gas-tight joint structure of the special thread button for oil casing according to claim 3, wherein the partition plate (235) is fitted to the sealing plate (234) to isolate the storage tank (233) from the communication tank (232).
  5. 5. The airtight connection structure of the oil casing thread special button according to claim 4, wherein the connecting rod (322) is provided through the fixing ring (321) and is slidably connected thereto.
  6. 6. The airtight connection structure of the special thread button for oil casing according to claim 5, wherein the opening part (35) further comprises a sliding rod (353) slidably disposed in the opening groove (354), one end of the sliding rod (353) is connected with the vertical rod (351) through a telescopic rod (352), the opening groove (354) is communicated with the storage groove (233), and the other end of the sliding rod (353) is fixedly connected with the partition plate (235).

Description

Air-tight connection structure of special knot of oil casing screw thread Technical Field The invention relates to the field of oil casing connection, in particular to an airtight connection structure of a special thread buckle of an oil casing. Background In the practical production application of the oil field, the oil field associated gas leakage problem caused by the fact that the oil casing is subjected to vibration to generate displacement after being connected by the threaded buckle has the problem of poor air seal among the pipes, so that the oil field associated gas leakage has great potential safety hazard. In the oil and gas exploitation process of deep wells and ultra-deep wells, if the sealing among the pipes is defective, leaked combustible gas can be diffused and accumulated along a weaker area in the well wall or geological layer. These leaked gases may form a build-up near the well production port and may burst out at geological weaknesses remote from the well. Once exposed fire is encountered, serious consequences such as combustion and even explosion are extremely easy to cause. Even more troublesome, the location of the diffusion and accumulation of leaking gas in geologic formations is often difficult to predict accurately, which makes the prevention and control of such safety hazards extremely difficult. Therefore, in the petroleum exploitation process, the problem of gas leakage caused by the fact that the gas seal between pipes is not tight must be avoided. Disclosure of Invention The application is provided in view of the problem that the airtight difference is not tight after the existing special thread buckle of the oil sleeve is installed due to vibration displacement. Therefore, the invention aims to provide an airtight connection structure of a special thread buckle of an oil sleeve, which aims to strengthen the stability of the connection of the special thread buckle of the oil sleeve and improve the air tightness of the oil sleeve after the threaded connection. The technical problem is solved by the following technical scheme that the invention provides an airtight connecting structure of a special thread buckle of an oil sleeve, which comprises two gas transmission elements, wherein each gas transmission element comprises a gas transmission pipe and a movable thread pipe fixedly arranged on the gas transmission pipe; The connecting elements comprise fixed thread parts which are arranged on the outer wall of the movable thread pipe in a threaded manner, an inflating part which is arranged on the lower wall of the fixed thread parts, and two filling parts which are arranged on the side walls of the fixed thread parts; the fixing element comprises a fixing tube fixedly arranged between the fixing thread parts, an adjusting part arranged in the fixing tube, four sliding parts arranged in the fixing tube, four limiting parts arranged in the fixing tube and an opening part arranged on the limiting parts; The movable threaded pipe drives the limiting part to move, the limiting part and the adjusting part are matched to limit the movable threaded pipe, the limiting part drives the two filling parts to open to limit the movable threaded pipe, the filling parts are opened to fill the inflating part. In a preferred embodiment of the airtight connection structure of the special thread of the oil casing, the fixed thread part comprises a fixed thread pipe which is arranged on the outer wall of the movable thread pipe in a threaded manner, and a connecting pipe which is fixedly arranged on the outer wall of the fixed thread pipe. In a preferred embodiment of the airtight connection structure of the special thread buckle of the oil casing, the inflating part comprises an air vent groove penetrating through the lower wall of the fixed thread pipe, an air transmission groove arranged in the lower wall of the connecting pipe, an air bag ring fixedly arranged on the side wall of the connecting pipe, a filter screen is arranged on the air vent groove, and the air vent groove is communicated with the air bag ring through the air transmission groove. In a preferred embodiment of the airtight connection structure of the special thread buckle of the oil casing, the filling part comprises filling grooves which are communicated with two sides of the side wall of the fixed thread pipe, storage grooves which are arranged in two sides of the side wall of the connecting pipe, and communication grooves which are arranged in two sides of the side wall of the connecting pipe, wherein the storage grooves are arranged above the communication grooves and are communicated with the filling grooves through the communication grooves, and the two storage grooves are respectively provided with expansion rubber particles and a water source. In a preferred embodiment of the airtight connection structure of the special thread buckle of the oil casing, the filling part further comprises a sealing plate fixedly arranged