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Large-diameter tool inductor operating under pressure

A technology with pressure operation and large diameter, applied in surveying, wellbore/well components, earth-moving drilling, etc., can solve problems such as affecting the accuracy of electromagnetic induction, affecting on-site operations, and difficult to work.

Active Publication Date: 2014-08-20
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Operators are unable to monitor the tools, pipe string structure and overall dimensions that enter the pressurized operation equipment, making it difficult to carry out the next step
In the actual operation process, in order to facilitate the operation, some pressurized equipment is equipped with an additional electromagnetic sensor, but during the tripping operation, the accuracy of the electromagnetic induction will be affected by the sloshing of the pipe string and the dirt on the outer wall of the pipe string. work on site

Method used

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  • Large-diameter tool inductor operating under pressure
  • Large-diameter tool inductor operating under pressure
  • Large-diameter tool inductor operating under pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the mechanical sensor for large-diameter tools working under pressure is characterized in that: the upper end of the sensor head 2 is connected to the spring 4, one end of the mandrel 6 is connected to the sensor head 2, the other end is connected to the indicator rod 9, and the indicator rod 9 Connected with the flange 7, the pressure guide channel 10 is located in the mandrel, parallel to the axis, the induction head 2 drives the mandrel 6, and then drives the indicator rod 9.

Embodiment 2

[0019] Such as figure 2 , 3 As shown, it is basically the same as Embodiment 1, the difference is that a pressure guide channel 10 is designed in the device body 1, and this channel is used to balance the pressure in the front and rear chambers of the mandrel 6, so as to avoid the high pressure in the device from affecting the core. Movement of axis 6. The pressures in the front and rear chambers of the mandrel 6 are equalized, thereby effectively avoiding the influence of the high pressure in the device on the mandrel 6 . During the drilling operation with pressure, the induction head is in direct contact with the outer surface of the tool 11. When the large-diameter tool connected to the pipe string 12 is lifted up, it will touch the induction head 2, and the large-diameter tool will touch the induction head. The head 2 and the induction head 2 will drive the mandrel 6 to recover the compression spring together, and then the indicating rod 9 will move together with the ma...

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Abstract

The invention relates to the technical field of workover treatment of a gas well under pressure, in particular to one of important ground assistant tools for workover treatment of the gas well under pressure, more particularly a large-diameter tool mechanical inductor operating under pressure. The large-diameter tool mechanical inductor is characterized in that the upper end of an induction head is connected with a spring, one end of a mandrel is connected to the induction head, the other end of the mandrel is connected with an indicating stick, the indicating stick is connected with a flange, a pressure guide channel is positioned in the mandrel and is parallel to the axis, and the induction head drives the mandrel and further drives the indicting stick. The large-diameter tool mechanical inductor is implemented by a pure mechanical structure and is low in cost, small in error and simple and reliable. Compared with the electromagnetic induction device, the large-diameter tool mechanical inductor is low in cost, visual and reliable in data and simple to maintain and operate.

Description

technical field [0001] The invention relates to the technical field of snubbing workover operations for gas wells, in particular to a large-diameter tool sensor for snubbing operations, which is one of the important ground auxiliary tools for snubbing workover operations for gas wells. It is used in workover operations such as tripping out of gas wells under pressure. Background technique [0002] At present, with the continuous updating and progress of fracturing technology and technology, the fracturing tools used in wells have complex structures and various types. When it is necessary to carry out workover operations on the well, in order to reduce the damage to the formation, various oilfield companies implement snubbing workover operations (that is, snubbing operations), especially the work of snubbing workover operations for gas wells is gradually increasing. The most critical technology in snubbing operation is how to pull out the fracturing tool string. The usual me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/08
Inventor 苏敏文韩虎成邓小强隆世明张文王建树李景彬许建伟杜加玉宫娜娜张波徐红
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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