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Archimedes double-helix split-type double-cluster hydraulic jet fracturing integrated string

A technology of hydraulic jet and hydraulic jet, which is applied in the direction of production fluid, wellbore/well components, earth-moving drilling, etc., to achieve the effect of improving the effect and preventing local erosion

Active Publication Date: 2019-01-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Archimedes double-helix split-type double-cluster hydraulic jet fracturing integrated string
  • Archimedes double-helix split-type double-cluster hydraulic jet fracturing integrated string
  • Archimedes double-helix split-type double-cluster hydraulic jet fracturing integrated string

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Effect test

Embodiment 1

[0025] The present invention provides as figure 1 , figure 2 , image 3 , Figure 4 As shown in the Archimedes double-helix split-flow dual-cluster hydraulic jet fracturing integrated pipe string, the present invention uses the Archimedes double-helix structure to change the oil pipe in front of the upstream and downstream injectors of the conventional hydraulic jet fracturing string The flow state and flow direction of the fluid inside and inside the upstream and downstream injectors solves the problem of particle sand concentration, flow, and pressure balance between the upper and downstream injectors of the dual-cluster hydraulic jet fracturing string dragged by the bottom seal, effectively preventing The double-cluster hydrojet fracturing string with bottom seal is damaged due to the erosion of the upper and lower injectors in different degrees, so as to avoid the entire double-cluster hydraulic jet fracturing string with bottom seal. Therefore, it is completely invali...

Embodiment 2

[0041] Based on Embodiment 1, in this embodiment, the oil pipe 1 is connected to the first adjusting nipple 3 through a safety joint 2 .

[0042] The oil pipe 1 is a Φ73mm oil pipe.

[0043] Both the first adjusting short joint 3 and the second adjusting short joint 6 are Φ73mm adjusting short joints.

[0044] The first Archimedes double-helix split-flow hydraulic jet 5 has the same structure as the second Archimedes double-helix split-flow hydraulic jet 8 , with a length of 370 mm, an outer diameter of 100 mm, and an inner diameter of 32 mm.

[0045] The first Archimedes double helix shunt joint 4 has the same structure as the second Archimedes double helix shunt joint 7, with a length of 2500 mm, an outer diameter of 90 mm, and an inner diameter of 32 mm.

[0046] The first Archimedes double helix diverter nipple 4 and the first Archimedes double helix diverter hydraulic injector 5 both have the Archimedes double helix in the inner cavity clockwise, with a helix angle of 45...

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Abstract

The invention provides an Archimedes double-helix split-type dual-cluster hydraulic jet fracturing integrated pipe string, two Archimedes double-helix split-flow nipples and two Archimedes double-helix split-flow hydraulic ejector bodies The cavity is specially processed with Archimedes double helix trapezoidal structure, and the surface of the double helix trapezoidal groove is plated with nickel-based alloy material to prevent the local erosion of the helical trapezoidal groove caused by the change of the fluid direction (spin angle). The invention makes the swirling sand-carrying fluid flow into each nozzle along the spiral groove, and realizes the particle sand concentration, the The flow and pressure are balanced, achieving the goal of two Archimedes double-helix split-flow hydraulic jets shooting through the formation and casing at the same time, effectively solving the problem of failure of the double-cluster hydraulic jet fracturing string with bottom seal dragging, practical It is strong and effective, and is suitable for use in horizontal wells with bottom seal dragging multi-stage hydraulic jet fracturing technology.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/267E21B43/11
CPCE21B43/11E21B43/267
Inventor 王祖文仝少凯张冕白明伟兰建平曹欣温亚魁任荣利杨红斌徐迎新崔会贺齐加德张激武
Owner BC P INC CHINA NAT PETROLEUM CORP
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