Special casing nipple for oil well

A casing pup joint and oil well technology, which is applied in the direction of casing, drill pipe, drilling equipment, etc., to achieve the effects of enhanced wear resistance, improved stability and reliability, and improved rationality and reliability

Active Publication Date: 2020-07-28
大安市鸿聚石油钻采有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a special casing pup joint for oil wells, which has the advantages of high connection strength, shock resistance and wear resistance, and solves the problems mentioned in the above-mentioned background technology

Method used

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  • Special casing nipple for oil well
  • Special casing nipple for oil well
  • Special casing nipple for oil well

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] see Figure 1-3 , a special casing sub-joint for oil wells, comprising a casing sub-joint 1, external threads 2 are respectively provided at both ends of the casing sub-joint 1, the outer threads of the external threads 2 are connected with a connecting casing 3, and the middle part of the external thread 2 There are threaded holes 4, and the threaded holes 4 and the sockets 7 correspond to one group, and there are at least two groups of the threaded ho...

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PUM

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Abstract

The invention relates to the technical field of casing nipples, and discloses a special casing nipple for an oil well. The special casing nipple for the oil well comprises a casing nipple, wherein thetwo ends of the casing nipple are separately provided with outer threads; the outer sides of the outer threads are in threaded connection to connecting casings; threaded holes are formed in the middle parts of the outer threads; anti-slide layers are arranged outside the connecting casings; the two ends of the casing nipple are separately provided with end rings; the two sides of each end ring are separately provided with jacks; and the inner sides of the two ends of the casing nipple are separately provided with inner threads. According to the special casing nipple disclosed by the invention, the connecting casings, the jacks and bolts are used for connecting the casing nipple to an oil extraction tube, and the connecting casings are rotated in a direction towards the joint of the two while the casing nipple is connected to the oil extraction tube, so that the threaded holes in the connecting casings correspond to the jacks; the bolts are inserted for fixing, connecting strength between the casing nipple and the oil extraction tube is remarkably improved, and a tube body is pressed to have a breaking phenomenon, and therefore, stability and reliability of the device are improved.

Description

technical field [0001] The invention relates to the technical field of casing nipples, in particular to a special casing nipple for oil wells. Background technique [0002] With the rapid development of society, the scope of oil field exploration and production is becoming wider and wider, and the facilities used for production are becoming more and more mature, including casing nipples used to connect oil pipes. It is said to play a very important role. High-quality socketed pipes have the functions of leak-proof, shock-proof and pressure-resistant, and are important accessories to ensure the mining process. [0003] There are more or less disadvantages in the actual use of traditional casing pup joints, such as the strength of the connection between the casing pup joint and the production tubing. Insufficient strength can easily lead to the fracture of the production tubing, which in turn leads to production accidents. In addition, with the development of the oil field, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/08E21B17/10B32B5/02B32B11/00B32B11/10B32B11/04B32B33/00
CPCB32B5/02B32B11/00B32B11/04B32B11/10B32B33/00E21B17/08E21B17/1085
Inventor 刘超
Owner 大安市鸿聚石油钻采有限公司
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