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An electro-hydraulic throttle salvage tool and its salvage method

A salvage tool and choke technology, applied in the field of electro-hydraulic choke salvage tools, can solve the problems of high cost of choke, low success rate of salvage measures, etc., to reduce pump pressure, improve salvage success rate, Effectiveness of reliable and low-cost salvage techniques and economic requirements

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an electro-hydraulic choke fishing tool and its fishing method. The first purpose is to solve the problem of low success rate in the existing choke fishing measures; The device has the problem of high cost

Method used

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  • An electro-hydraulic throttle salvage tool and its salvage method
  • An electro-hydraulic throttle salvage tool and its salvage method

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Experimental program
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Effect test

no. 1 approach

[0048] The first embodiment of the present invention relates to an electro-hydraulic choke fishing tool, such as figure 1 and figure 2As shown, it includes a casing 5, the top of the casing 5 is an upper joint 1 for the cable to pass through, and the casing 5 is encapsulated in order from top to bottom with an electronic short joint 2, a hydraulically driven short joint 3 and a self-resetting salvage spear short joint 4, The electronic sub-section 2 is electrically connected with the hydraulic driving sub-section 3, and the hydraulic-driving sub-section 3 pushes the self-resetting salvage spear sub-section 4 to grab the throttle through hydraulic oil.

[0049] The working process of the electro-hydraulic throttle salvage tool is as follows:

[0050] Inject hydraulic oil into the electro-hydraulic choke salvage tool, and the hydraulic oil fills the hydraulic drive sub-section 3; use the cable to pass through the upper joint 1 and electrically connect with the electronic sub-s...

no. 2 approach

[0054] This embodiment relates to an electro-hydraulic throttle salvage tool, such as figure 1 and figure 2 As shown, it includes a casing 5, the top of the casing 5 is an upper joint 1 for the cable to pass through, and the casing 5 is encapsulated in order from top to bottom with an electronic short joint 2, a hydraulically driven short joint 3 and a self-resetting salvage spear short joint 4, The electronic sub-section 2 is electrically connected with the hydraulic driving sub-section 3, and the hydraulic-driving sub-section 3 pushes the self-resetting salvage spear sub-section 4 to grab the throttle through hydraulic oil.

[0055] The hydraulic drive short joint 3 includes, from top to bottom, a connecting joint 3-1, a hydraulic balance mechanism 3-2, a hydraulic power mechanism 3-3 and a driving hydraulic cylinder mechanism 3-4. The lower end of the electronic short joint 2 is connected to the connecting joint 3-2. 1. Sealed and plugged, the hydraulic balance mechanism ...

no. 3 approach

[0063] This embodiment relates to an electro-hydraulic throttle salvage tool, such as figure 1 and figure 2 As shown, it includes a casing 5, the top of the casing 5 is an upper joint 1 for the cable to pass through, and the casing 5 is encapsulated in order from top to bottom with an electronic short joint 2, a hydraulically driven short joint 3 and a self-resetting salvage spear short joint 4, The electronic sub-section 2 is electrically connected with the hydraulic driving sub-section 3, and the hydraulic-driving sub-section 3 pushes the self-resetting salvage spear sub-section 4 to grab the throttle through hydraulic oil.

[0064] The hydraulic drive short joint 3 includes, from top to bottom, a connecting joint 3-1, a hydraulic balance mechanism 3-2, a hydraulic power mechanism 3-3 and a driving hydraulic cylinder mechanism 3-4. The lower end of the electronic short joint 2 is connected to the connecting joint 3-2. 1. Sealed and plugged, the hydraulic balance mechanism ...

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Abstract

The invention provides an electro-hydraulic choke salvaging tool and a salvaging method, comprising a casing, the top of the casing is an upper joint for cables to pass through, and the casing is encapsulated in order from top to bottom with electronic short joints and hydraulically driven short joints. Joints and self-resetting salvage spear sub-sections, electronic sub-sections are electrically connected with hydraulic driving sub-sections, and hydraulic-driving sub-sections push the self-resetting fishing-spear sub-sections to grab the throttle through hydraulic oil. The motor is controlled by the ground controller, the motor drives the plunger pump, the plunger pump drives the push rod, and the push rod drives the fishing head until the choke is released, which effectively improves the success rate of the downhole choke salvage and can meet the requirements of the downhole choke in the gas field. The safety, reliability and low-cost salvage technology and economic requirements in the process of salvage by flow device.

Description

technical field [0001] The invention belongs to the field of downhole operating tools, in particular to an electro-hydraulic choke fishing tool and a fishing method thereof. Background technique [0002] Downhole throttling technology plays an important role in throttling and depressurizing, reducing costs, and simplifying wellhead process flow. Its key tool, choke, is widely used in Sulige Gas Field as an important development method to reduce costs and increase efficiency. [0003] However, due to downhole sand production, scaling, corrosion and other reasons, some wells have the problems of high difficulty and low success rate in salvaging the downhole choke with steel wire, and the failure of choke salvage will seriously affect the implementation of bubble discharge, Drainage and gas recovery measures such as velocity control and plunger gas lift may even cause the gas well to fail to produce normally. If the choke fails to salvage, measures such as killing the oil pipe ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/20
CPCE21B31/20
Inventor 王嘉鑫王效明巨亚锋马得华李旭梅张家富张安康陈晓丽刘春斌黄平
Owner PETROCHINA CO LTD
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