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Large-diameter multi-layer fracturing string applicable to environment of 120 DEG C and 70 MPa

A fracturing string and large-diameter technology, which is used in the production of fluids, wellbore/well components, and earth-moving drilling, etc., can solve the problems of obvious throttling effect and large frictional resistance, reduce throttling loss and improve aging. , Improve the effect of construction displacement

Active Publication Date: 2014-04-23
DAQING FUWANTONG PETROLEUM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to structural reasons, the existing multi-layer fracturing string has the problems of obvious throttling effect and high friction, which inhibits the increase of displacement.

Method used

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  • Large-diameter multi-layer fracturing string applicable to environment of 120 DEG C and 70 MPa
  • Large-diameter multi-layer fracturing string applicable to environment of 120 DEG C and 70 MPa
  • Large-diameter multi-layer fracturing string applicable to environment of 120 DEG C and 70 MPa

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with accompanying drawing:

[0014] Depend on figure 1 and figure 2 As shown, a large-diameter multi-layer fracturing string suitable for 120°C and 70MPa environments includes a safety joint 1 and a plug 6. The bottom of the safety joint 1 is connected to a hydraulic anchor 2, and the bottom of the hydraulic anchor 2 is connected to a There are several packers 3, the upper part of the packer 3 is connected with a sand blaster, and the bottom of the pipe string is connected with a plug 6.

[0015] The hydraulic anchor 2 includes a short joint 31, the lower end of the short joint 31 is threadedly connected to a housing 39, and the housing 39 is provided with a plurality of fluke holes 37, and there are 12 fluke holes 37 along the shaft. There are 4 rows, 3 in each row, and the fluke holes 37 in each row are evenly distributed along the circumferential direction, and the fluke holes 7 between two adjac...

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PUM

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Abstract

The invention relates to a large-diameter multi-layer fracturing string applicable to an environment of 120 DEG C and 70 MPa. The large-diameter multi-layer fracturing string applicable to the environment of 120 DEG C and 70 MPa mainly solves the problems of obvious throttle effects and high friction resistance of existing multi-layer fracturing strings and is characterized in that the bottom of a safe joint (1) is connected with a hydraulic anchor (2), the bottom of the hydraulic anchor (2) is connected with a plurality of packers (3), the upper portions of the packers (3) are connected with a sand blaster. The large-diameter multi-layer fracturing string applicable to the environment of 120 DEG C and 70 MPa achieves a large channel and has the advantages of reducing throttle losses and friction resistance.

Description

technical field [0001] The invention relates to the field of oil fields, in particular to a large-diameter multi-layer fracturing pipe string applicable to high-temperature and high-pressure environments of 120°C and 70MPa. Background technique [0002] In the field of oilfield fracturing, hydraulic fracturing technology, as an important measure to increase production and injection of oil and water wells, has been widely used in the development of low-permeability oil layers, and its fracturing scale is also increasing year by year. Large-scale fracture network fracturing can promote the productivity and ultimate recovery of reservoirs, and the corresponding fracturing construction requirements are also increased, with the characteristics of large displacement, large liquid volume, and continuous multi-stage fracturing. However, due to structural reasons, the existing multi-layer fracturing string has the problems of obvious throttling effect and high friction, which inhibi...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 李国庆赵岭杰
Owner DAQING FUWANTONG PETROLEUM SCI & TECH
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