Hydraulic oil pipe inner cutter

Abstract

The invention discloses a hydraulic oil pipe inner cutting knife which comprises a cutting knife body, wherein an upper connecting end is arranged at one end of the cutting knife body; a lower connecting end is arranged at the other end of the cutting knife body; a water inlet passage, a pressurizing passage and a pressure adjustment screw mounting cavity are arranged in the cutting knife body; a pressure adjustment screw mutually matched with the pressure adjustment screw mounting cavity is in threaded connection with the pressure adjustment screw mounting cavity; a pressure adjustment passage is arranged in the pressure adjustment screw; a pressure adjustment screw fastening groove communicated with the pressure adjustment passage is formed in the lower end of the pressure adjustment screw; a plurality of cutting knife mounting cavities and guide sleeve mounting cavities communicated with the water inlet passage are arranged in the cutting knife body; guide sleeves mutually matched with the guide sleeve mounting cavities are in threaded connection with the guide sleeve mounting cavities; mounting cavities and limiting convex edges are arranged in the guide sleeves; guide sleeve fastening grooves are formed in the outer sides of the guide sleeves; cutting knives and compression springs are arranged in the cutting knife mounting cavities.

Description

technical field [0001] The invention relates to a workover equipment in the petroleum industry, in particular to a hydraulic oil pipe internal cutter. Background technique [0002] In the process of oilfield development, due to formation factors, improper measures, aging of wellhead devices, etc., blowouts out of control often occur, and the tubing must be cut off before workover. At present, most of the oil pipe cutting instruments used are thermal cutting, and combustible gas is used in the cutting process, which is prone to the danger of explosion, and the cutting position is not accurate, and some of them are difficult to achieve cutting. It is necessary to use cold cutting equipment for operation. At present, there is no mature cold cutting product suitable for use in the well site, which has the disadvantages of high failure rate, complex structure, and poor cutting effect. Contents of the invention [0003] The problem to be solved by the present invention is to pr...

AI Technical Summary

Problems solved by technology

At present, most of the oil pipe cutting instruments used are thermal cutting, and combustible gas will be used in the cutting process, which is prone to the danger of explosion, and the cutting position is not accurate, and some are difficult to achieve cutting

It needs to use cold cutting equipment for operation. At present, there is no mature cold cutting product suitable for use in the well site, which is manifested in the disadvantages of high equipment failure rate, complex structure, and poor cutting effect.

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