Oil well single-cylinder double-well casing mechanical electrical cutting device

Abstract

The invention discloses an oil well single-cylinder double-well casing mechanical electrical cutting device which includes a first anchoring mechanism (2), a rotary joint (3), a cutting mechanism (4),a speed reducer (6), a drive motor (7) and a second anchoring mechanism (8) which are sequentially arranged. The cutting mechanism (4) comprises a cutting blade (45), and the driving motor (7) can drive the cutting blade (45) to conduct rotary cutting. The oil well single-cylinder double-well casing mechanical electrical cutting device can effectively prevent the condition that cutting of a single-cylinder double-well casing is influenced by tracks of two wells and well body structures, operation is simple, the success rate is high, a complex ground power source is not needed, a pure mechanical cutting method is adopted, the marine ecological environment is effectively protected, cutting operation is efficient, safe and smooth implementation of subsequent operation can be ensured, and thesafe and efficient development of offshore oil is achieved.

Description

Technical field [0001] The invention relates to the field of oil exploitation equipment, in particular to a mechanical electric cutting device for single-tube and double-well casings of oil wells. Background technique [0002] In recent years, the traditional single-bore dual-well drilling technology has become increasingly mature in the Bohai Sea, but there are still many problems. For example, affected by the trajectory of two wells (anti-collision, deflection point, surface completion depth, etc.), and well structure, traditional abrasive jet construction is difficult, has a long period, and is costly. At the same time, in the existing downhole workover technology, casing cutting mainly includes two types of thermal cutting and cold cutting. Thermal cutting mostly uses chemical methods, which is highly dangerous, difficult to operate, low in success rate, and easy to pollute the environment. Cold cutting uses a physical cutter method, which is environmentally friendly. There ...

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Problems solved by technology

[0003] In order to solve the problem of low success rate of existing casing cutting tools, the present invention provides a single-tube double-well casing mechanical electric cutting device, which can effectively avoid the single-tube double-well casing mechanical electric cutting device. Well casing cutting is affected by the trajectory of the two wells and the structure of the wellbore. It is easy to operate, has a high success rate, and does not require complicated ground power sources. It is cut in a purely mechanical way, which effectively protects the marine ecological environment. The cutting operation is efficient and can be Ensure the safe and smooth progress of follow-up operations to achieve safe and efficient offshore oil development

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