Cable type electrohydraulic control pipe cutting tool

Abstract

The invention relates to a cable type electrohydraulic control pipe cutting tool which comprises an anchoring module and a cutting module. The anchoring module is arranged on the rear portion, and the cutting module is arranged on the front portion. The anchoring module is composed of an electrohydraulic oil source device, an environment pressure balance device, an electrohydraulic drive control device and an anchoring executing device. By means of the technical scheme, modular design is adopted, the beneficial effects that an electrohydraulic system is large in power-to-weight ratio and convenient to unload are utilized, a novel blade feeding mechanism is used, so that the beneficial effects that the anchoring output force is large and controllable and fault recycling is convenient are achieved; the anchoring state pretightening function is achieved, anchoring failures caused by external vibration are avoided, and the character of improving the cutting work stability is achieved; and the beneficial effect that the cutting range margin is large is achieved, and therefore the phenomenon that an underground casing pipe deforms, and the cutting work cannot be completely finished is avoided. The maximum diameter of the cutting radial direction of a blade and the diameter of a cutter head is 1.97:1, and by means of the modular design, the beneficial effects of high interchangeability and convenient maintenance are achieved.

Description

technical field [0001] The invention relates to a cable type pipe cutting tool in an oil well, in particular to a cable type electro-hydraulic control pipe cutting tool. Background technique [0002] The main design source of downhole pipe cutting tools is used for radial horizontal wells, sidetracking horizontal wells, casing damaged wells, oil drilling abandoned platforms, coalbed methane, geothermal, natural gas, shale gas, steam wells and salt wells in oil and gas fields And other needs, has broad market prospects. [0003] At present, the cutting technologies that can be used in the above occasions at home and abroad mainly include concentrated energy cutting, chemical cutting, diamond cutting rope technology, abrasive water jet technology and mechanical cutting, among which mechanical cutting is a relatively traditional casing cutting method with a simple structure , easy to manufacture and low cost, but the existing technical means are not much different from ten yea...

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Problems solved by technology

[0003] At present, the cutting technologies that can be used in the above occasions at home and abroad mainly include concentrated energy cutting, chemical cutting, diamond cutting rope technology, abrasive water jet technology and mechanical cutting, among which mechanical cutting is a relatively traditional casing cutting method with a simple structure , easy to manufacture and low cost, but the existing technical means are not much different from ten years ago, and there are many deficiencies. The existing mechanical cutters have relatively large vibration, easy eccentricity of the cutter and lack of Reliable fault recovery mode makes the cutting efficiency relatively low, mainly due to poor anchoring stability and low flexibility of fault recovery mode, represented by the electric casing cutting tool (EP1241321B1, US6868901B2) developed by the British SUNDEX company, this tool has It has the advantages of safety, cleanliness, controllability and high precision, but the system has disadvantages such as small anchoring force, difficulty in adjusting, and low success rate of failure recovery. In addition, there is a small margin in the cutting range, which may easily lead to cutting couplings and wires. It is difficult to make the cutting operation go smoothly.

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