Electrically-driven labor-input type casing milling and fishing combined tool

A combined tool and casing milling technology, which is applied in the direction of wellbore/well components, earthwork drilling, etc., can solve the problems of high operating costs, sand production in the wellbore, sand accumulation in the restrictor, etc., and achieve the effect of reducing construction

CN112145112AActive Publication Date: 2020-12-29SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-12-29

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Abstract

The invention relates to the technical field of petroleum and natural gas drilling engineering, in particular to an electrically-driven labor-input type casing milling and fishing combined tool. The problem that a throttler cannot be withdrawn due to sand accumulation of the throttler, breakage of a clamping jaw, failure of a sealing rubber sleeve and the like can be solved. According to the technical scheme of the electrically-driven labor-input type casing milling and fishing combined tool, during fishing, firstly a fishing tool descends into a well by a specified depth, an anchoring part anchors the whole fishing tool, an axial feeding part and a power part cooperatively drive a casing milling and fishing part to mill accumulated sand hard blocks or broken clamping jaws around the throttler, and after unclamping succeeds, fishing treatment is carried out on the throttler; and if multiple fishing is invalid, the axial feeding part and the power part cooperatively drive the casing milling and fishing part to release, and in the whole process, the underground condition is judged by detecting the current change of a motor. The tool is simple and compact in structure, low in cost andbeneficial to fishing the throttler which cannot be fished by a conventional fishing cylinder.
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Description

technical field

[0001] The invention relates to the technical field of oil and gas drilling engineering, in particular to downhole fishing equipment for oil and gas wells, in particular to an electric-driven labor-intensive casing milling and fishing combination tool. Background technique

[0002] Oil and gas well production involves different types of downhole tools. As a kind of downhole tool, the downhole choke can effectively solve the problem of bottomhole fluid accumulation caused by insufficient downhole pressure in the production process, improve the liquid carrying capacity, and at the same time effectively prevent the formation of natural gas hydrate, avoid the construction of ground facilities and guarantee To ensure the safety of personnel in the production process. However, due to the life of the downhole choke, unreasonable choice of choke, process design of the choke, unreasonable handling of materials, placement of the choke, unstable salvage construction, s...

Examples

Embodiment Construction

[0024] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the present invention and actual conditions.

[0025] Such as figure 1 As shown, the present invention provides an electric-driven cast-in type casing milling and fishing combination tool, which includes an upper joint 01, an anchoring part 02, an axial feed part 03, a power part 04 and a casing milling and fishing part 05; the upper joint 01 is connected to the cable joint; the lower part of the upper joint 01 is threaded to the upper part of the anchoring part 02; the lower part of the anchoring part 02 is threaded to the upper part of the axial feed part 03; the lower part of the axial feed part 03 is connected to The upper part of the power part 04 is threaded; the lower part of the power part 04 and the upper part of the milling and fishing part 05 are threaded.

[0026] Such as figure 1 , 2, 6, and 7, the anchoring part 02 is compos...