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Method and device for judging reliable abutting joint of downhole testing and adjusting instrument and water distributor

A water distributor, measuring and adjusting instrument technology, applied in the directions of surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as easy to cause misjudgment, and achieve the effect of improving reliability and eliminating misjudgment

Pending Publication Date: 2017-10-24
贵州航天凯山石油仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional judgment method has certain limitations, especially for concentric water injection wells, the measuring and adjusting instrument will also generate docking signals at the tubing collars, packers, etc., which may easily lead to misjudgment

Method used

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  • Method and device for judging reliable abutting joint of downhole testing and adjusting instrument and water distributor
  • Method and device for judging reliable abutting joint of downhole testing and adjusting instrument and water distributor

Examples

Experimental program
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Effect test

Embodiment

[0018] The device used in this example is figure 1 As shown, it includes a water distributor 9 provided with a docking groove 10, and a support 8 is provided on the downhole measuring and adjusting instrument 11. The support 8 is hinged to one end of a set of docking claws 5 evenly distributed along the circumference via a pin shaft 7, and the outside of the docking claws 5 is the middle The double-inclined structure with high and low sides. A spring 6 is installed between the inner side of the butt claw 5 and the bracket 8. When the large diameter enters the small diameter pipe, the spring force can be overcome to make the butt claw 5 smoothly enter the small diameter pipe from the large diameter pipe. The other end of the docking claw 5 is provided with a magnet 4, the bracket 8 corresponding to the position of the magnet 4 is provided with a mounting seat 3, and the mounting seat 13 is provided with a magnetic field detection assembly 2; the bracket 8 has one end of the mounti...

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Abstract

The invention discloses a method and device for judging reliable abutting joint of a downhole testing and adjusting instrument and a water distributor. According to the method and device for judging reliable abutting joint of the downhole testing and adjusting instrument and the water distributor, a bracket of the downhole testing and adjusting instrument is provided with a set of elastic abutting joint claws which can rotate with a hinge pin as a pivot, the other ends of the abutting joint claws are provided with magnetic steel, and a magnetic field detection assembly is installed in the position, corresponding to the magnetic steel, on the bracket; the water distributor is provided with an abutting joint trough, the magnetic steel is driven to generate radial displacement through the abutting joint claws, and the magnetic field intensity detected by the magnetic field detection assembly is simultaneously changed; and when the magnetic field detection assembly detects a magnetic field change characteristic signal of abutting joint of the downhole testing and adjusting instrument and the abutting joint trough of the water distributor, the fact that the downhole testing and adjusting instrument is in reliable abutting joint with the water distributor can be determined, and then the water distributor is adjusted. According to the method and device for judging reliable abutting joint of the downhole testing and adjusting instrument and the water distributor, reliability of concentric well abutting joint detection is achieved, and the shortages of the prior art are overcome.

Description

Technical field [0001] The invention relates to a method and a device for judging the reliable docking of a downhole measuring and adjusting instrument and a water distributor, and belongs to the technical field of downhole instrument docking detection. Background technique [0002] At present, water drive technology is widely used in oilfields, and water drive wells need to use downhole measuring and adjusting instruments to adjust the injection flow rate of the water distributor of each layer. When adjusting, the downhole measuring and adjusting instrument is first connected with the water distributor in the water well string, and then the water distributor is adjusted to control the water injection volume of this layer. How to judge whether the measuring and adjusting instrument is successfully connected with the water distributor plays an important role in the success of the measuring and adjusting and the efficiency of the measuring and adjusting. The traditional docking ju...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B43/20
CPCE21B43/20E21B47/00
Inventor 魏炎红何天成李建军龙先明
Owner 贵州航天凯山石油仪器有限公司
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