Recoverable once pipe column fracture-acidizing well completion process and tool thereof

A fracturing acidification and tool technology, applied in wellbore/well components, production fluids, earthwork drilling, etc., can solve the problems of low pressure resistance level, low performance, inconvenient use, etc. Reasonable effect

Inactive Publication Date: 2012-07-18
荆州市赛瑞能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different formations have different fracture pressures and formation temperatures. Currently, commonly used acid fracturing tool strings have simple functions, low performance, and are inconvenient to use.
For example, the commonly used mechanically removable

Method used

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  • Recoverable once pipe column fracture-acidizing well completion process and tool thereof
  • Recoverable once pipe column fracture-acidizing well completion process and tool thereof
  • Recoverable once pipe column fracture-acidizing well completion process and tool thereof

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Embodiment Construction

[0033] The present invention will be further described below by specific examples.

[0034] The retrievable one-trip string fracturing and acidizing well completion process and its tools use a hydraulically removable packer with high pressure resistance, with a temperature and pressure resistance level of 150°C and 70 MPa, and a matching recovery packer is designed. The tool enables it to realize a string acidizing fracturing completion process in ultra-deep wells.

[0035] The specific steps of the retrievable one-trip string fracturing and acidizing well completion process are as follows:

[0036] The first step, entering the well string:

[0037] Connect the SRH packer 7 with the milling extension cylinder 8, the sealing extension cylinder 11, and the mechanical switch sliding sleeve 14 in sequence, and the lower part is connected to the upper dead block; Connect the insertion rod 45 in sequence, and insert it into the SRH packer 7 pipe string, connect the anchor sealing ...

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Abstract

The invention relates to a recoverable once pipe column fracture-acidizing well completion process and a tool thereof, which belong to the technical field of well completion treatment. The tool comprises an SRH packer, an SRH packer recovery tool, a mechanical switch sliding bush assembly and other matching tools. A pipe string is connected on the ground and then placed in an oil well, ball setting and seat sealing can be performed before fracturing construction, a production layer can be opened and closed at any time, and the recovery tool can be descended into the oil well to recover all the technical pipe columns when the pipe string needs to be taken out. Constructions of acidizing, producing, sealing, well completion and the like can be completed once, construction time is saved, construction cycle is shortened, construction procedures are simplified, construction safety is improved, and probability of occurrence of accidents is lowered. After the oil pipe column is separated from the packer, the production layer can be completely isolated to avoid pollution of the production layer, the once pipe column fracture-acidizing well completion process can be completed in ultra-deep wells, and the process and the tool are especially suitable for the ultra-deep wells having characteristics of easiness in injection and leakage after acidizing of a carbonatite stratum.

Description

technical field [0001] The invention relates to a retrievable one-trip pipe string fracturing acidification well completion process and a tool thereof, belonging to the technical field of well completion treatment. Background technique [0002] During the production of oil and gas wells, in order to increase production, it is usually necessary to perform acid fracturing on oil and gas wells. Acid fracturing is to use high-pressure acid liquid to depress the formation and perform chemical dissolution to restore or expand the channel of oil flow in the well zone of the oil layer, improve the permeability of the reservoir, and increase the productivity of oil and gas wells. Oil and gas wells usually have higher production after acid fracturing. [0003] During acid fracturing, it is necessary to run an acid fracturing string. The lower acidizing fracturing string can allow acid liquid to enter the formation through the string, and the casing can also be protected by the acidi...

Claims

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Application Information

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IPC IPC(8): E21B43/27
Inventor 王琼程市君龚文冲陶风
Owner 荆州市赛瑞能源技术有限公司
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