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Ground control method for underground sliding sleeves

A technology of surface control and sliding sleeve, which is applied in the direction of wellbore/well valve device, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of poor timeliness and the sliding sleeve does not have the function of closing, and achieves cost reduction. Low, simple installation, large diameter effect

Active Publication Date: 2014-10-08
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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  • Ground control method for underground sliding sleeves
  • Ground control method for underground sliding sleeves
  • Ground control method for underground sliding sleeves

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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Abstract

The invention discloses a ground control method for underground sliding sleeves. The ground control method comprises the steps as follows: a ground electromagnetic wave emitting device generates command information for controlling opening or closing of a plurality of underground sliding sleeves according to input control commands, and the command information is sent to the underground sliding sleeves after amplification; an electromagnetic wave receiving device arranged in each underground sliding sleeve receives the command information sent from the ground, and the command information is compared with respective pre-assigned control commands; if the command information is not consistent with the assigned control commands of the underground sliding sleeves, the underground sliding sleeves which are not consistent with the command information do not act and continuously wait for next ground command information; and if the command information is consistent with the assigned control command of one underground sliding sleeve, the underground sliding sleeve acts and finishes opening or closing operation required by the command information. According to the ground control method for the underground sliding sleeves, opening and closing actions of the underground sliding sleeves can be remotely controlled by the ground electromagnetic wave signals and can be controlled in real time, and further, ball pitching is not required.

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 Applications(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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