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Surface control method of downhole sliding sleeve

A ground control and sliding sleeve technology, which is applied in wellbore/well valve device, earthwork drilling, and wellbore/well components, etc. Simple, low cost, high work efficiency

Active Publication Date: 2016-08-17
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 method of downhole sliding sleeve
  • Surface control method of downhole sliding sleeve
  • Surface control method of downhole sliding sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for controlling a downhole sliding sleeve on the ground, comprising the steps of:

[0054] a. 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;

[0055] b. 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;

[0056] c. 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, and continue to wait for the next ground command information;

[0057] d. If the instruction information is consistent with the control instruction assigned by the downhole sleeve...

Embodiment 2

[0082] 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

[0086] A method for controlling a downhole sliding sleeve on the ground, comprising the steps of:

[0087] 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;

[0088] 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;

[0089] 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;

[0090] 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 method for controlling downhole sliding sleeves on the ground, which comprises the following steps: a ground electromagnetic wave emitting device generates command information for controlling the opening or closing of a plurality of downhole sliding sleeves according to the input control commands, and the command information is amplified and sent to the downhole sliding sleeves. transmission; the electromagnetic wave receiving device set in each downhole sleeve receives the command information sent from the ground, and compares the command information with the control commands assigned in advance; if the command information is inconsistent with the control command assigned by the downhole sleeve, then The downhole sleeve that does not match the command information does not act, and continues to wait for the next ground command information; if the command information is consistent with the control command assigned to the downhole sleeve, the downhole sleeve will move to complete the opening or closing of the downhole sleeve required by the command information. Close work. 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 method for controlling a downhole sliding sleeve on the ground, which is used for staged fracturing and acidification transformation of horizontal wells, and belongs to the technical field of well completion transformation used in petroleum 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 m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/16E21B34/06E21B43/27
Inventor 石磊周正刘运楼钱斌尹丛彬张剑
Owner BC P INC CHINA NAT PETROLEUM CORP
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