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Perforation/fracturing/packing integrated device and its multi-stage fracturing process string

A fracturing and consistent technology, applied in the direction of sealing/isolation, production fluid, wellbore/well components, etc., can solve the problems that the hydraulic isolation effect cannot be guaranteed, the packer is easy to fail, and the operation is discontinuous, etc., to achieve Avoid oil and gas layer pollution, shorten the construction period, and shorten the pressure bearing time

Active Publication Date: 2018-12-25
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

Among them, the "packer + sliding sleeve" layered fracturing string needs to be perforated before construction, which is easy to cause pollution to the oil and gas layers; the hydraulic jet layered fracturing string without the fixed string can not obtain the hydraulic isolation effect. Guarantee: The construction period of the dragging string hydraulic jet layered fracturing string is long, the operation is discontinuous, the perforation efficiency is low after the nozzle works for a long time, the packer is repeatedly set and unsealed, and the packer is prone to failure

Method used

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  • Perforation/fracturing/packing integrated device and its multi-stage fracturing process string
  • Perforation/fracturing/packing integrated device and its multi-stage fracturing process string
  • Perforation/fracturing/packing integrated device and its multi-stage fracturing process string

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

[0030] Such as figure 1 As shown, the perforating / fracturing / packing integrated device includes an upper joint 301, an outer cylinder 310, a center pipe 315 and a lower joint 317 which are screwed in sequence from top to bottom; wherein, the upper joint 301 is threaded on the outer cylinder 310 The inner side of the top end, the lower joint 317 is threaded on the outside of the bottom end of the center pipe 315, and the upper joint 301 and the lower joint 317 are respectively used to connect with the oil pipes above and below the device;

[0031] The upper claw spring ball seat 302, the inner cylinder 303 and the lower claw spring ball seat 306 connected in sequence are arranged from top to bottom inside the outer cylinder 310, and the three are integrally formed; the upper cl...

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Abstract

The invention discloses a perforation / fracturing / packing integration device and thereof. The device completes step-by-step opening of corresponding hydraulic ejectors, packers and sand blasting sliding sleeves by putting in balls of the same size twice successively, and the segmented series are not affected; each hydraulic injector only carries out the perforation operation of the corresponding layer section, and the perforation efficiency is high; the fracturing construction is carried out through the sand blasting sliding sleeves, and the displacement of construction is not affected; the packers are sealed in sequence, the time of pressure tolerating is short, the packing effect is more reliable, the change of the sleeve pressure (stratum pressure) can be monitored in real time, and sand blocking can be effectively prevented; when the upper layer is constructed, a lower layer packer is automatically unblocked, and the pipe column is easy to trip out; and the multistage fracturing technique pipe column composed of a plurality of perforation / fracturing / packing integration devices can achieve the integration of perforation, fracturing and packing, the operation is simple, safe and reliable, the pollution of an oil gas layer during perforation is avoided, the construction period is shortened, and the operating cost is reduced.

Description

technical field [0001] The invention relates to the technical field of low-permeability reservoir transformation, in particular to a perforating / fracturing / packing integrated device and a multi-stage fracturing process string. Background technique [0002] my country's oil and gas reservoirs are complex and diverse, and low-permeability oil and gas resources are abundant. Based on oil fields, PetroChina's oil and gas production and engineering technology service companies have carried out effective fracturing technology research and formed unique fracturing technologies. In recent years, vertical wells and horizontal wells have played an important role in the fracturing of low-permeability reservoirs, thin layers, and multi-layers. main technology. [0003] At present, “packer + sliding sleeve” layered fracturing, hydraulic jet hydraulic pack-in layered fracturing with immobile string and tubing dragged hydraulic jet layered fracturing are mainly used in layered fracturing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/114E21B33/126
CPCE21B33/126E21B43/114E21B43/261
Inventor 骆劲羽程智远张鹏刘志斌崔振锚詹鸿运王学正韩永亮王长在秦诗涛
Owner BC P INC CHINA NAT PETROLEUM CORP
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