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Oil draining device for tubing

A technology for oil drainage and tubing, which is used in wellbore/well valve devices, wellbore/well components, earth-moving drilling, etc. Discharge and other problems to achieve the effect of improving wellhead operating conditions, reducing operating costs and saving time

Inactive Publication Date: 2019-11-12
LIAONING XINHUA INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the second construction operation of the oil well by the oilfield operation team on site, due to the residual oil in the oil pipe that cannot be discharged, the oil overflows when the pipe string is lifted, causing environmental pollution, which increases the cost of crude oil extraction and the difficulty of wellhead operation, and also affects construction progress

Method used

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  • Oil draining device for tubing
  • Oil draining device for tubing
  • Oil draining device for tubing

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Embodiment Construction

[0018] See Figure 1-Figure 7 , the specific structure of this embodiment is: a kind of tubing oil drainage device, comprising a central pipe 6, the upper end of the central pipe 6 is threaded to the upper joint 1, the lower end of the central pipe 6 is threaded to the lower joint 12, and the upper joint 1 There is a circumferential bar-shaped hole groove 14 and an oil drain hole I15, the oil drain hole I15 is provided with a sealing ring 5; the upper joint 1 is threadedly connected with a protective ring 2, and the upper joint 1 is set with a seal sleeve 3, the sealing sleeve 3 is located behind the protection ring 2, the sealing sleeve 3 is provided with a toothed rear end 16, the sealing sleeve 3 is provided with a pin hole 17 and an oil drain hole II 18, and the pin hole 17 A positioning pin 4 is provided, and the positioning pin 4 is threaded into the sealing sleeve 3, and the cylindrical shaft part of the lower part of the positioning pin 4 enters the strip-shaped hole 1...

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Abstract

The invention relates to an oil draining device for tubing. The oil draining device comprises a center pipe; the upper end of the center pipe is in threaded connection with an upper joint, and the lower end of the center pipe is in threaded connection with a lower joint; circumferential strip-shaped hole grooves and oil draining holes I are formed in the upper joint, and the upper joint is in threaded connection with a protective ring; a sealing sleeve sleeves the upper joint and is provided with a toothed rear end, and pin shaft holes and draining holes II are formed in the sealing sleeve; atoothed check ring, a centralizer main body and a friction block sleeve the middle of the center pipe; a guiding groove is formed in the rear part of a guiding sleeve, a guiding pin is arranged on thelower joint, and the guiding pin is arranged in the guiding groove; and the lower end of the lower joint is in threaded connection with an anti-collision ring. According to the oil draining device, the situation that during operation, crude oil overflows out of a wellhead from the tubing, and consequently environment pollution is caused can be effectively prevented through easy operations such asupward lifting and rotating, and thus the operation condition of the wellhead is improved.

Description

technical field [0001] The invention relates to an oil production operation tool in an oil field, in particular to an oil pipe oil drainage device. Background technique [0002] During the second construction operation of the oil well by the oilfield operation team on site, due to the residual oil in the oil pipe that cannot be discharged, the oil overflows when the pipe string is lifted, causing environmental pollution, which increases the cost of crude oil extraction and the difficulty of wellhead operation, and also affects construction progress. With the continuous improvement of domestic oilfields' requirements for green and environmentally friendly construction, this problem urgently needs to be effectively solved in terms of economic benefits and long-term social benefits. Contents of the invention [0003] In order to make up for the deficiencies of the above-mentioned prior art, the object of the present invention is to propose a tubing oil drainage device, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/12E21B21/10
CPCE21B21/103E21B34/12
Inventor 梁伟成梁闯
Owner LIAONING XINHUA INSTR CO LTD
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