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Motor-driven extrusion-type underground annular blowout preventer and communication method thereof

A motor-driven, extrusion-type technology, applied in the field of blowout prevention technology, can solve problems such as danger and weak automation, and achieve the effects of preventing well kick and blowout, reducing total cost and easy operation

Active Publication Date: 2016-08-03
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation of this type of blowout preventer requires manual lowering of the drill string, which has certain requirements on the skills of the workers. There will be certain dangers in the process of lowering the drill string, and the automation is relatively weak.

Method used

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  • Motor-driven extrusion-type underground annular blowout preventer and communication method thereof
  • Motor-driven extrusion-type underground annular blowout preventer and communication method thereof
  • Motor-driven extrusion-type underground annular blowout preventer and communication method thereof

Examples

Experimental program
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Effect test

specific Embodiment 1

[0031] like figure 1 As shown, a motor-driven extrusion type downhole annular blowout preventer includes an upper joint (1), a fixed sleeve (4), an outer sleeve (6), a central sleeve (7), a motor (8), a compression cylinder (10), rubber cylinder upper joint (8), rubber cylinder (15), rubber cylinder lower joint (10) and lower joint (18), the fixed cylinder (4), motor (8), compression cylinder (10 ) and the rubber cylinder (15) are overlaid on the central cylinder (7); the central cylinder (7) is threadedly connected with the upper joint (1) and the lower joint (18) respectively, and the compression cylinder (10) is driven by the motor (8) The rubber cylinder (15) can be compressed by the compression cylinder (10) to achieve sealing and blowout prevention, and the rubber cylinder (15) can be dragged in reverse to realize unsealing, and the rubber cylinder (15) is compressed and sealed while the cycle of the compression cylinder (10) The hole (11) is aligned with the circulatio...

specific Embodiment 2

[0032] Based on the device of embodiment 1, the blowout prevention method of the motor-driven extrusion type downhole annular blowout preventer is:

[0033] 1. When an overflow is found, the formation high-pressure fluid enters the drill string through the drill bit and flows upward. When the overflow is found, after the well is shut down on the ground, the formation high-pressure liquid enters the drill string through the drill bit and flows upward, so that the downhole blowout prevention tools near the drill bit are closed. , to block the passage in the drill string. At the same time, formation high-pressure fluid in the wellbore annulus passes through the lower joint of the downhole blowout preventer, and blowout prevention measures need to be taken at this time.

[0034] 2. The radio transmitter (a-2) of the ground control center (a) transmits the control command to the wellhead acoustic wave communication subsection (b), through the electro-acoustic transducer (b) in the ...

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Abstract

The invention discloses a motor-driven extrusion-type underground annular blowout preventer, and belongs to the technical field of underground blowout prevention. The motor-driven extrusion-type underground annular blowout preventer mainly comprises a communication module, a control module, a power module and an execution module. By the motor-driven extrusion-type underground annular blowout preventer, positive and negative rotation of a motor is achieved under the control of the control module; power is transmitted to a compression tube of the power module; and the compression tube compresses a rubber tube or reversely drags the rubber tube to achieve sealing and unsealing of the blowout preventer. The motor-driven underground annular blowout preventer can be repeatedly used, is suitable for a plurality of well types, can be used in a whole well section, and is driven by the motor; sealing and unsealing are relatively easy, and the efficiency is relatively high; and the application prospect is wide.

Description

technical field [0001] The invention relates to a blowout prevention technology when well kick and blowout occur in the drilling process of oil and gas fields. Background technique [0002] Drilling plays a very important role in various tasks of oil exploration and oil field development, such as finding and confirming oil and gas structures, obtaining industrial oil flows, ascertaining the oil and gas bearing areas and reserves of proven oil and gas structures, and obtaining relevant The geological data and development data of the oil field, and finally the crude oil is taken from the ground to the ground, etc., are all done through drilling. means. [0003] During the drilling process, when drilling into oil and gas layers, if the bottom hole pressure is lower than the formation pressure, the formation fluid will enter the wellbore. After a large amount of formation fluid enters the wellbore, well kicks, blowouts, and even fires may occur. lead to major accidents. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/06E21B44/00
CPCE21B33/06E21B44/00
Inventor 黎伟宋伟雷鸿翔袁胜桐宁点孙切杨博杨牧宋金丽周妍竹罗献科李果林陈检
Owner SOUTHWEST PETROLEUM UNIV
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