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

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Problems solved by technology

However, due to structural reasons, the existing multi-layer fracturing string has the problem

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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Example Embodiment

[0013] The present invention will be further explained below in conjunction with the drawings:

[0014] by figure 1 and figure 2 As shown, a large-diameter multi-layer fracturing pipe string suitable for an environment of 120°C and 70MPa includes a safety joint 1 and a plug 6. The bottom of the safety joint 1 is connected with a hydraulic anchor 2, and the bottom of the hydraulic anchor 2 is connected with A number of packers 3, the upper part of the packer 3 is connected with a sandblaster, and the bottom of the pipe string is connected with a plug 6.

[0015] The hydraulic anchor 2 includes a short section 31. The lower end of the short section 31 is connected with a housing 39 through threads. The housing 39 is provided with a number of anchor claw holes 37. There are 12 anchor claw holes 37 along the axis. There are 4 rows in each row, 3 in each row, the anchor holes 37 in each row are evenly distributed along the circumferential direction, and the anchor holes 7 between two a...

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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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