CN-224214127-U - Oil pipe nipple for adjusting pipe column length

CN224214127UCN 224214127 UCN224214127 UCN 224214127UCN-224214127-U

Abstract

The utility model belongs to the field of oil pipe joints, and particularly relates to an oil pipe nipple for adjusting the length of a pipe column. In order to improve the adjustment precision when the length of a pipe column is adjusted, the utility model provides an oil pipe nipple for adjusting the length of the pipe column, which comprises an inner pipe, an outer pipe, a sealing ring and an upper joint, wherein the upper joint is connected with the inner pipe, square threads are arranged on the inner pipe, the outer pipe and the sealing ring, the sealing ring is positioned above the outer pipe and forms a double-nut locking mechanism together with the outer pipe, threads for connecting a lower oil pipe are arranged on the outer surface of the outer pipe, a ring groove is arranged on one of the upper end surface of the outer pipe and the lower end surface of the sealing ring, an annular bulge for being inserted into the ring groove is arranged on the other one, the inner side of the ring groove extends to the inner surface of the corresponding outer pipe or the sealing ring, and sealing filler is filled in a space formed by the annular bulge, the inner pipe and the groove wall of the ring groove. The relative position of the inner pipe and the outer pipe is adjusted through square threads so as to adjust the length of the pipe column, and the accuracy can reach 1 cm.

Inventors

YANG XIANGJIE
SHANG YULONG
Tan Tianchen
LI XUGUANG
TAN ZHIZHENG
Yue Yueqi

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司中原油田分公司

Dates

Publication Date: 20260508
Application Date: 20250623

Claims (10)

1. The utility model provides an oil pipe nipple joint for adjusting tubular column length, including the inner tube, the outer tube and be used for connecting upper portion oil pipe's top connection, a serial communication port, still include the sealing ring, the top connection links to each other with the upper end of inner tube, all be equipped with square screw thread on the outer wall of inner tube, on the inner wall of outer tube and the inner wall of sealing ring, inner tube and outer tube and the equal threaded connection of sealing ring, the sealing ring is located outer tube top and constitutes double nut locking mechanical system with the outer tube jointly, be equipped with the screw thread that is used for connecting lower part oil pipe on the surface of outer tube, be equipped with the annular on one of the up end of outer tube and the lower terminal surface of sealing ring, be equipped with the annular arch that is used for inserting in the annular on the another one, the inboard of annular extends to the internal surface of corresponding outer tube or sealing ring, the space intussuseption that annular arch, the cell wall and annular form is filled with sealing filler.
2. The tubing nipple for adjusting a length of a tubing string of claim 1, wherein the lower end of the inner tube is further threadedly connected with a slip stop ring having an outer diameter greater than the inner diameter of the outer tube and less than the outer diameter of the outer tube.
3. An oil pipe nipple for adjusting the length of a pipe string according to claim 1 or 2, wherein the inner wall surface of the lower end of the upper joint is provided with an internal thread, the outer wall surface of the upper end of the inner pipe is provided with an external thread, and the upper joint is screwed with the inner pipe.
4. An oil pipe nipple for adjusting the length of a pipe string according to claim 1 or 2, wherein the annular groove is provided on the upper end face of the outer pipe, the annular protrusion is provided on the lower end face of the seal ring, and the outer wall face of the annular protrusion abuts against the groove side wall of the annular groove.
5. The oil pipe nipple for adjusting the length of a pipe string according to claim 4, wherein the cross section of the annular protrusion is a right trapezoid, a space formed by the inclined waist of the right trapezoid, the inner pipe and the groove wall of the annular groove is filled with sealing filler, the lower bottom of the right trapezoid is connected with the sealing ring, and the vertical waist of the right trapezoid is abutted with the groove side wall of the annular groove.
6. The tubing nipple for adjusting a tubing string length of claim 5 wherein the upper bottom of the right trapezoid abuts the bottom wall of the groove.
7. An oil pipe nipple for adjusting the length of a pipe string according to claim 1 or 2, wherein the annular groove is provided on the lower end face of the seal ring, the annular protrusion is provided on the upper end face of the outer pipe, and the outer wall face of the annular protrusion abuts against the groove side wall of the annular groove.
8. The oil pipe nipple for adjusting the length of a pipe string according to claim 7, wherein the cross section of the annular protrusion is a right trapezoid, a space formed by the inclined waist of the right trapezoid, the inner pipe and the groove wall of the annular groove is filled with sealing filler, the lower bottom of the right trapezoid is connected with the outer pipe, and the vertical waist of the right trapezoid is abutted with the groove side wall of the annular groove.
9. The tubing nipple for adjusting a length of a tubing string of claim 8 wherein the upper base of the right trapezoid abuts the bottom wall of the groove.
10. A tubing nipple for adjusting the length of a tubing string as claimed in claim 1 or claim 2 wherein the sealing filler is polytetrafluoroethylene.

Description

Oil pipe nipple for adjusting pipe column length Technical Field The utility model belongs to the field of oil pipe joints, and particularly relates to an oil pipe nipple for adjusting the length of a pipe column. Background During perforation, the error of the tubular column is required to be regulated to be less than or equal to 10 cm/1000 m so as to ensure the accuracy of perforation positions. In this process, it is necessary to adjust the length of the tubing string using tubing nipples. The Chinese patent with the authorized bulletin number of CN208605138U and the authorized bulletin day of 2019.03.15 discloses a telescopic oil pipe short joint, which comprises an inner pipe, an outer pipe and an upper joint, wherein the upper joint is used for being in threaded connection with an upper oil pipe, the lower end of the upper joint is in threaded connection with the outer pipe, the inner pipe is positioned in the outer pipe, a clamp spring is sleeved on the inner pipe, and a horseshoe buckle matched with the clamp spring to play a one-way locking function is arranged on the inner wall surface of the outer pipe. When the oil pipe short circuit device is used, the upper joint is pressed downwards, the inner pipe is fixed, the outer pipe moves downwards, the clamp spring is matched with the horseshoe buckle in a one-way locking mode, and after the pressing is stopped, the length of the oil pipe short circuit is locked and cannot be lengthened. When the length of the pipe column is adjusted by using the oil pipe short circuit, the oil pipe short circuit can only be shortened unidirectionally, so that a worker must carefully press the upper joint to avoid scrapping of the oil pipe short circuit due to too short length. In actual operation, on one hand, workers worry about scrapping due to too short oil pipe short connection, so the workers are not afraid of pressing the upper joint with force, the adjusting efficiency is low, and on the other hand, the workers are difficult to adjust the oil pipe short connection to a specific length in a pressing mode, and the adjusting precision is poor. Disclosure of utility model The utility model aims to provide an oil pipe nipple for adjusting the length of a pipe column, which is used for solving the technical problems that the existing oil pipe nipple can only be shortened in one direction, the efficiency is low and the adjusting precision is poor when the length is adjusted. In order to achieve the above purpose, the technical scheme of the oil pipe nipple for adjusting the length of the pipe column provided by the utility model is as follows: The utility model provides an oil pipe nipple joint for adjusting tubular column length, including the inner tube, the outer tube and be used for connecting upper portion oil pipe's top connection, still include the sealing ring, the top connection links to each other with the upper end of inner tube, all be equipped with square screw thread on the outer wall of inner tube, on the inner wall of outer tube and the inner wall of sealing ring, inner tube and outer tube and sealing ring equal threaded connection, the sealing ring is located the outer tube top and constitutes double nut locking mechanical system with the outer tube jointly, be equipped with the screw thread that is used for connecting lower part oil pipe on the surface of outer tube, be equipped with the annular on one of the up end of outer tube and the lower terminal surface of sealing ring, be equipped with the annular arch that is used for inserting in the annular on the another one, the inboard of annular extends to the internal surface of corresponding outer tube or sealing ring, the space intussuseption that annular arch, the cell wall of inner tube and annular forms is filled with sealing filler. Further, the lower end of the inner tube is also in threaded connection with a slip-stopping ring, and the outer diameter of the slip-stopping ring is larger than the inner diameter of the outer tube and smaller than the outer diameter of the outer tube. Further, an inner thread is arranged on the inner wall surface of the lower end of the upper joint, an outer thread is arranged on the outer wall surface of the upper end of the inner pipe, and the upper joint is in threaded connection with the inner pipe. Further, the annular groove is arranged on the upper end face of the outer tube, the annular bulge is arranged on the lower end face of the sealing ring, and the outer wall face of the annular bulge is abutted with the groove side wall of the annular groove. Furthermore, the cross section of the annular bulge is a right trapezoid, a space formed by the inclined waist of the right trapezoid, the inner pipe and the groove wall of the annular groove is filled with sealing filler, the lower bottom of the right trapezoid is connected with the sealing ring, and the vertical waist of the right trapezoid is abutted with the groove side wall of the annular groove. Further,