Horizontal well stage-unlimited sectional reconstruction method

A segmented transformation and infinite-level technology, which is applied to earthwork drilling, wellbore/well components, wellbore/well valve devices, etc., can solve complex operations, long construction periods, and inability to realize infinite-level segmental transformation, etc. problems, to achieve simple operation, improve reliability, and reduce mechanical failures

Active Publication Date: 2013-12-11
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

This method is complicated to operate and has a long construction period
[0006] Other existing technologies, such as the patented "Segmented Fracturing String for Openhole Horizontal Wells", "Segmented Fracturing Strings for Oil and Gas Horizontal Wells", and "Segmented Fracturing Strings for Hydraulic Sandblasting and Immovable Pipelines for Openhole Completion", etc. It is a multi-level segmental transformation using ball throwing, and there is a problem of level difference, which cannot meet the requirements of infinite level segmental transformation

Method used

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  • Horizontal well stage-unlimited sectional reconstruction method

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Embodiment 1

[0037] A method for infinitely staged segmental reconstruction of a horizontal well, comprising the following steps:

[0038] a. The signal receiver on the sliding sleeve sends the search signal within the set range;

[0039] b. Put the signal transmitter into the well. When the signal transmitter enters the set range, the signal transmitter receives the search signal and sends a control signal to the signal receiver;

[0040] c. After the signal receiver receives the control signal, it activates the power mechanism, pushes the piston to move upward, opens the sandblasting hole, opens the internal and external communication channels of the oil pipe, and under the action of the piston, the ball seat forming cylinder of the sliding sleeve forms a ball seat, Implement the first stage of transformation;

[0041] d. After the first section of transformation is completed, throw the ball to make it sit on the ball seat formed by the ball seat generating cylinder, block the first sec...

Embodiment 2

[0052] like figure 2 As shown, after the packer 8 and the guide shoe 4 are set, the sliding sleeve with the outer diameter similar to the oil pipe 13 or casing 14 is connected to the oil pipe or casing, and lowered to a predetermined position. By putting a low-frequency signal transmitter into the well, the signal receiver 11 sends a coded signal to search for the signal transmitter within the effective range to approach, and when the signal transmitter receives the signal, it will decode and verify the coded signal , when the signal transmitter is successfully identified, it will send a high-frequency coded message to the signal receiver 11 on the sleeve, and the signal receiver 11 will receive the high-frequency message and decode it. If the identified information matches, Then the igniter 10 will be excited, and the shaped energy bomb 9 will be ignited. The high-energy gas produced by the shaped energy bomb 9 will push the piston 5, expose the sandblasting hole, open the i...

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Abstract

The invention discloses a horizontal well stage-unlimited sectional reconstruction method. The method comprises the following steps that: a, a signal receiver on a sliding sleeve sends a search signal within a set range; b, a signal projector is put into the well, when the signal projector enters into the set range, the signal projector receives the search signal and sends a control signal to the signal receiver; c, the signal receiver stimulates a power mechanism after receiving the control signal, the power mechanism pushes a piston to move upwards and open a sand blasting hole, inner and outer communicated channels of an oil pipe are opened, and under the action of the piston, a ball seat generation tube of the sliding sleeve generates a ball seat, and the first section reconstruction is implemented; d, after the first section reconstruction is finished, a ball is added to block the first section reservoir, and the inner and outer communicated channels of the oil pipe are closed; e, the steps above are repeated for orderly performing reconstruction of subsequent sections. By the horizontal well stage-unlimited sectional reconstruction method, stage difference is avoided, the number of stages of sections is not limited by the inner diameter of the well bore, and stage-unlimited large-scale sectional fracturing reconstruction can be realized.

Description

technical field [0001] The invention relates to a method for infinitely staged segmented reconstruction of a horizontal well, which belongs to the technical field of well completion reconstruction used in petroleum exploitation. Background technique [0002] With the deepening of exploration and development, shale gas and tight gas reservoirs have entered the stage of large-scale development, and large-scale fracturing methods such as horizontal well staged fracturing and volume fracturing have gradually become the main technology for oil and gas field development. The fracturing technologies mainly include: open-hole packer + sliding sleeve staged fracturing technology, drillable bridge plug staged fracturing technology, double-seal single-pressure staged fracturing technology, and hydraulic jet staged fracturing technology. There are certain limitations. The open hole packer+sliding sleeve technology requires the cooperation of different differential balls and ball seats ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/267E21B34/14
Inventor 任雁鹏邹鸿江黄超张承武王兴建李童徐洋
Owner BC P INC CHINA NAT PETROLEUM CORP
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