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Blowout prevention device and method for well repair of pumping well

A technology for blowout prevention devices and pumping wells, which is applied in wellbore/well components, earthwork drilling, sealing/isolation, etc. It can solve problems such as low success rate, oil layer pollution, and non-reusable use, so as to improve the success rate , increase sealing, increase the effect of sand control

Active Publication Date: 2014-07-30
DAQING SENENPU MACHINERY MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are several methods to prevent blowout in oil field workover operations, such as mud killing method, blowout preventer, valve switch, and pumping well compression type blowout preventer switch. Among these blowout prevention methods, mud pressure High well cost and pollution to the reservoir
In other methods, the success rate is low, the sealing material is easy to age, and there is no sand control ability. In particular, the bottom oil inlet method is used, which cannot be reused.
These current conditions cannot meet the site requirements, so a new blowout prevention method with high success rate of blowout prevention, low cost, safety and reliability is needed

Method used

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  • Blowout prevention device and method for well repair of pumping well

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Embodiment Construction

[0008] The invention will be further described below in conjunction with the accompanying drawings, as shown in the figure: the invention includes an upper joint 1, a compression head 2, an upper spring 3, a moving pressure claw 4, a track cylinder 5, a rotating pawl 6, an inner cylinder 7, and a sliding sleeve 8. The lower spring 9 and the outer cylinder 10 constitute a complete technical solution. The specific implementation process is: firstly, the screen pipe 18 is connected to the lower part of the fixed valve 17, the blowout prevention device is adjusted to the closed state, and the lower part of the inner cylinder 7 The internal thread is connected with the external thread on the fixed valve 17, the internal thread on the lower part of the oil pump barrel 15 is connected with the external thread on the joint 1 of the blowout preventer, and the screen pipe 18 is inserted from the bottom up and down, and the valve 17 is fixed. The blowout prevention device, the oil pump ba...

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Abstract

The invention discloses a blowout prevention device and method for well repair of a pumping well and belongs to a method for preventing well blowout in an oil field well repair task. The blowout prevention device is connected between a pump cylinder of an oil well pump and a fixing valve to achieve a blowout prevention effect; when gravities of a piston and a sucker rod of the oil well pump are pressed, the bottom surface of the piston is compressed on a compression head 1; on-off action is realized by using an interaction of oblique tips and oblique surfaces of a movable pressing claw 4 and a rotary pawl 6; due to a special structure on an inner cylinder of the device, an oil inlet manner is changed; a bottom oil inlet manner is changed into a side oil inlet manner; influence on switch-on of the blowout prevention device when underground pressure is excessive is overcome; and a success rate of the blowout prevention device is increased.A seal section between a sliding sleeve and the inner cylinder is not made of the traditional rubber flexible material, minimum clearance fit between metals is employed, and the blowout prevention device further has the characteristic of reusability.The method is simple to apply, flexible to operate, low in cost, high in sealability and sand resistance and energy-saving, protects an environment and can realize a pressure balance task.

Description

technical field [0001] The invention relates to a blowout prevention method for well workover in an oil field, and belongs to a blowout prevention device and method for workover of oil pump wells. Background technique [0002] At present, there are several methods to prevent blowout in oilfield workover operations, such as mud killing method, blowout preventer, valve switch, and pumping well compression type blowout preventer switch. Among these blowout prevention methods, mud pressure The cost of the well is high and there is pollution to the oil reservoir. In other methods, the success rate is low, the sealing material is easy to age, and there is no sand control ability. In particular, the bottom oil inlet method is used, which cannot be reused. These current conditions cannot meet the site requirements, so a new blowout prevention method with high success rate of blowout prevention, low cost, safety and reliability is needed. Contents of the invention [0003] The pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03E21B33/06
Inventor 杨志英
Owner DAQING SENENPU MACHINERY MFG
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