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Real-time monitoring system and monitoring method for downhole tension of single-core cable for perforation

A real-time monitoring system and single-core cable technology, applied in tension measurement, measurement, earthwork drilling and mining, etc., can solve problems such as the inability to monitor the tension of single-core cables downhole in real time, and achieve easy maintenance, reliable communication, and high system reliability Effect

Active Publication Date: 2020-10-02
CHUANNAN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This short joint can only monitor the tension of the cable head, and it can only be used under the condition of multi-core cables, and cannot monitor the downhole tension of single-core cables in real time

Method used

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  • Real-time monitoring system and monitoring method for downhole tension of single-core cable for perforation
  • Real-time monitoring system and monitoring method for downhole tension of single-core cable for perforation
  • Real-time monitoring system and monitoring method for downhole tension of single-core cable for perforation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A single-core cable downhole tension real-time monitoring system for perforation, including uphole equipment and downhole equipment, the uphole part includes a display screen and a control panel, the display screen is connected to the control panel, and the downhole part includes a positioning nipple, a tension nipple and an explosion-proof The downhole instrument string is formed by connecting the isolation subs in sequence, the explosion-proof isolation subs are connected to the perforating guns, the control panel is respectively connected to the positioning subs, the tension subs and the explosion-proof isolation subs through single-core cables, the positioning subs, the tension subs and the The control circuit lines of the explosion-proof isolation pup joints are connected in parallel. Rely on the multi-core integrated socket to connect the single-core cable. When in use, you can input commands through the control panel to control switching to explosion-proof isolati...

Embodiment 2

[0062] This embodiment further illustrates the present invention in conjunction with the accompanying drawings.

[0063] The invention is located at the lower part of the bridle and the upper part of the perforating gun, and is suitable for cable perforation operations. The invention is compatible with the single-core cable depth correction system, and can also obtain the magnetic positioning signal (also called CCL signal) of the casing collar while the single-core cable obtains the tension signal; the invention can be used in the high temperature and high pressure environment underground; The invention can not affect the use of the electronic perforation selection system of oil and gas wells, that is, the communication of another set of single-core cables at the lower end of the pipe string can not be affected, and can not be affected by it; the invention can resist the impact of perforation.

[0064] A single-core cable downhole tension real-time monitoring system for perfo...

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Abstract

The invention discloses a real-time monitoring system of down-hole tension of a single-core cable used for perforating and a monitoring method thereof. The monitoring system comprises surface equipment and down-hole equipment, the surface portion comprises a display screen and a control panel, the display screen is connected with the control panel, the down-hole portion comprises a down-hole instrument string formed by sequentially connecting a locating sub, a tension sub and an explosion-proof isolation sub, the explosion-proof isolation sub is connected with a perforating gun, the control panel is connected with the locating sub, the tension sub and the explosion-proof isolation sub through the single-core cable separately, and control circuits of the locating sub, the tension sub and the explosion-proof isolation sub are connected with in parallel. By means of the system and the method, tension change of the down-hole cable is measured in real time, and tension signals are uploadedto the ground for display through the single-core cable, so that visual guidance is provided for cable tube column pumping operation of a horizontal well section, and a basis is provided for judging the stress state of a down-hole tube string.

Description

technical field [0001] The invention relates to a single-core cable downhole tension real-time monitoring system for perforation and its monitoring method, which is suitable for the field of oil and gas well cable conveying perforation (WCP), and is mainly used in cable clustering operations, especially for shale gas and water Flat well pumping cluster perforating operation. Background technique [0002] In the development of shale gas, due to the needs of horizontal well completion technology and fracturing formation, perforation operations generally adopt the wireline pumping process. This process needs to use the method of pumping liquid in the horizontal well section. After pushing the cable string to the target layer by the thrust of the liquid, first energize the bridge plug igniter, set the bridge plug to form a temporary plug, and then lift the pipe string Go to the predetermined position, energize and detonate the electric detonator to realize the perforation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00G01L5/04
CPCG01L5/04
Inventor 殷腾陈斌宋杰刘雪峰刘宗胜段威唐其林
Owner CHUANNAN ENERGY TECH CO LTD
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