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Surface control well sliding sleeve for staged fracturing and acidizing reconstruction of horizontal wells

A staged fracturing and surface control technology, applied in wellbore/well components, wellbore/well valve devices, production fluids, etc., can solve problems such as poor timeliness and sliding sleeves that cannot be closed, and achieve Low cost, conducive to post-production, large diameter effect

Active Publication Date: 2016-09-28
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

However, compared with similar foreign products, this type of sliding sleeve does not have the function of closing later
And the existing pitching sleeve operation needs to wait for the time it takes for the ground to drop the ball to the sliding sleeve ball seat, which is poor in timeliness

Method used

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  • Surface control well sliding sleeve for staged fracturing and acidizing reconstruction of horizontal wells
  • Surface control well sliding sleeve for staged fracturing and acidizing reconstruction of horizontal wells
  • Surface control well sliding sleeve for staged fracturing and acidizing reconstruction of horizontal wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A ground-controlled downhole sliding sleeve for staged fracturing and acidification reconstruction of horizontal wells, comprising a ground electromagnetic wave emitting device and a switch sliding sleeve, the switch sliding sleeve including an electromagnetic wave receiving device, a drive system and a sliding sleeve 23, the electromagnetic wave receiving device and The driving system is arranged on the sliding sleeve 23, and the shell of the sliding sleeve 23 has an injection hole 32, and the valve 22 of the sliding sleeve 23 has an injection hole 32; the ground electromagnetic wave transmitting device sends command information, and the electromagnetic wave receiving device Receive the instruction information sent by the electromagnetic wave emitting device and control the drive system to drive the valve 22 to move; when the valve 22 moves to the valve hole and the shell injection hole communicates, the sliding sleeve 23 is in an open state, and the valve 22 moves to W...

Embodiment 2

[0072] The invention is divided into two parts: a surface control part and a downhole execution part. The ground control part is an electromagnetic wave emitting device; the downhole part is an execution part, which is a switch sliding sleeve. In order to meet the needs of the current staged fracturing and acidizing process for horizontal wells, usually, multiple electrically controlled switchable sliding sleeves are connected to the completion string of a well at the same time, and they are lowered into the well together. Different instruction information is assigned. When the ground electromagnetic wave launcher sends a control instruction, each sliding sleeve receives the ground control instruction, and at the same time compares it with the instruction information assigned by itself. If the command information is different, the sliding sleeve will not act. If the ground control command is the same as the command information distributed inside the sliding sleeve, the sliding...

Embodiment 3

[0076] In this embodiment, the switch control of the sliding sleeve includes the following steps:

[0077] a. Multiple sliding sleeves are connected to the completion string at the same time, and each sliding sleeve is assigned a different control command to run into the well;

[0078] b. The ground electromagnetic wave transmitting device generates command information to control the opening or closing of multiple downhole sliding sleeves according to the input control commands, and the command information is amplified and then sent to the downhole sliding sleeves;

[0079] c. The electromagnetic wave receiving device installed in each downhole sleeve receives the command information sent from the ground, and compares the command information with the respective pre-allocated control commands;

[0080] d. If the command information is inconsistent with the control command assigned by the downhole sleeve, the downhole sleeve whose command information does not match will not act,...

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PUM

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Abstract

The invention discloses a ground control downhole sliding sleeve for staged fracturing and acidification transformation of horizontal wells, which comprises a ground electromagnetic wave emitting device and a switch sliding sleeve. The switch sliding sleeve includes an electromagnetic wave receiving device, a drive system and a sliding sleeve. The electromagnetic wave The receiving device and the driving system are arranged on the sliding sleeve, and the casing of the sliding sleeve is provided with injection holes, and the valve of the sliding sleeve is provided with injection holes; the ground electromagnetic wave transmitting device sends command information, and the electromagnetic wave receiving device receives electromagnetic wave emission The instruction information sent by the device controls the drive system to drive the valve movement; when the valve movement reaches the connection between the valve injection hole and the shell injection hole, the sliding sleeve is in an open state, and the valve movement reaches the valve injection hole and the shell injection hole. When the hole is not connected, the sliding sleeve is closed. The invention can remotely control the switch action of the downhole sliding sleeve through ground electromagnetic wave signals, and can control the switching action of the sliding sleeve in real time; and does not need to throw the ball.

Description

technical field [0001] The invention relates to a ground control well sliding sleeve used for staged fracturing and acidizing transformation of horizontal wells, and belongs to the technical field of well completion transformation used in oil exploitation. Background technique [0002] As a downhole tool that can communicate / isolate oil and gas wells and formation fluids, sliding sleeves are currently widely used in staged fracturing and acidizing strings for horizontal wells. At present, the staged fracturing and acidification of horizontal wells in oilfields adopts mechanical ball-throwing sliding sleeves. To open each level of sliding sleeves, fracturing balls of corresponding sizes need to be dropped. The inner diameter of the sliding sleeve ball seat and the fracturing ball are different. From the bottom to the top, the inner diameter of the sliding sleeve ball seat and the fracturing ball increases step by step, and the maximum cannot exceed the minimum inner diameter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/16E21B43/27
Inventor 石磊刘运楼钱斌黎宗琪
Owner BC P INC CHINA NAT PETROLEUM CORP
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