Archimedean-double-helix flow split type double-cluster hydraulic ejection and fracturing integrated tubular column

Abstract

The invention provides an Archimedean-double-helix flow split type double-cluster hydraulic ejection and fracturing integrated tubular column. Two Archimedean-double-helix flow split nipples and inner cavities of two Archimedean-double-helix flow split hydraulic ejector bodies are specially machined to form an Archimedean-double-helix trapezoid structure, and the surface of a double-helix trapezoid groove is plated with a nickel-based alloy material so as to prevent erosion of the local part of the helix trapezoid groove by fluid due to changes of the rotation direction (rotation angle). The tubular column enables the rotational-flow sand-carried fluid to flow into each nozzle along the helix groove, accordingly, the balance among the particle sand concentration, the flow and the pressure between the Archimedean-double-helix flow split hydraulic ejector in the upstream and the Archimedean-double-helix flow split hydraulic ejector in the downstream of the double-cluster hydraulic ejection and fracturing tubular column is achieved, the objective of simultaneous ejection opening of strata and bushings by the two Archimedean-double-helix flow split hydraulic ejectors is reached, the problem such as the failure in pulling the double-cluster hydraulic ejection and fracturing tubular column by an arranged bottom seal is effectively solved, the practicality is high, the effect is apparent, and the tubular column is applicable to a bottom seal pulled multi-stage hydraulic ejection and fracturing process in horizontal wells.

Description

technical field [0001] The invention relates to an Archimedes double-helix split-flow double-cluster hydraulic jet fracturing integrated pipe string, which is mainly suitable for the multi-stage hydraulic jet fracturing process of a horizontal well with bottom seal dragging. Background technique [0002] The hydraulic jet fracturing process is the mainstream technology for increasing storage and production of low-permeability oil and gas reservoirs in Changqing Oilfield. The key tool string for implementing this technology is multi-stage hydraulic jet fracturing strings, so as to complete oil testing and stimulation of low-permeability oil and gas reservoirs , Well completion integrated construction operations. Due to the current hydraulic jet fracturing construction process with bottom seal dragging, there is a serious uneven particle sand concentration between the upstream and downstream injectors of the double-cluster hydraulic jet fracturing string, and the upstream inje...

AI Technical Summary

Problems solved by technology

[0003] The present invention uses the Archimedes double helix structure to change the flow state and flow direction of the oil pipe in front of the upstream and downstream injectors of the conventional hydraulic jet fracturing string and the fluid inside the upstream and downstream injectors, and solves the problem of dragging with bottom seals. The problem of particle sand concentration, flow and pressure balance between the upstream and downstream injectors of the double-cluster hydraulic jet fracturing string effectively prevents the dual-cluster hydraulic jet fracturing string from being dragged by the bottom seal due to the different degrees of upstream and downstream injectors. The damage of the upper and lower injectors caused by erosion has achieved the purpose of avoiding the complete failure of the double-cluster hydraulic jet fracturing string with the bottom seal and the failure to continue the construction

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