Hydraulic radial surface cutting ejector, cutting assembly and cutting method

Abstract

The invention discloses a hydraulic radial surface cutting ejector, a cutting assembly and a cutting method. The hydraulic radial surface cutting ejector comprises a body, at least one ejection hole formed in the axial side wall of the body, a nozzle and an outer sheath, wherein the nozzle and the outer sheath are arranged in the ejection hole; and the outer sheath is arranged outside the nozzle in a sleeving mode and fixedly connected with the ejection hole. The nozzle is provided with at least three ejection holes in different ejection directions. When the hydraulic radial surface cutting ejector is used for cutting, the nozzle is provided with the at least three ejection holes in different ejection directions, hydraulic radial surface cutting is adopted, a fan-shaped hole channel is formed, cracks develop along the minimum principal stress under the action of ground stress, and therefore the stratum permeability is improved, and the purposes of increasing the yield and injection are achieved.

Description

technical field [0001] The invention relates to the field of oil and gas drilling, more specifically, to a hydraulic radial surface cutting injector, a cutting assembly and a cutting method. Background technique [0002] At present, the abrasive water jet technology uses the striking and cutting action of the abrasive jet to penetrate the metal casing and break the rock near the wellbore. In order to achieve fast and efficient penetration of the metal casing and cut the rock, the jet velocity must reach 180m / s Above, according to Bernoulli’s principle, as the jet velocity increases, the pressure applied at the nozzle increases correspondingly, and the power of the surface pumping equipment also increases, and the abrasive water jet simply creates rod-cone holes in the formation, which is of great importance to the formation. Reservoir stimulation is limited in scope. [0003] In order to further increase the contact area between the wellbore and the reservoir, it is necessa...

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Problems solved by technology

[0003] In order to further increase the contact area between the wellbore and the reservoir, it is necessary to use the expansion of formation fractures to form complex diversion channels and provide high-conductivity advantageous channels for the production of oil and gas wells. However, in the actual construction process, the direction of a single cluster of jets cannot be guaranteed. Along the direction of the minimum principal stress, the crack is distorted and the resistance to crack extension is increased

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