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Down-hole positioning adjusting arm

A technology of positioning adjustment and arm clamping, applied in wellbore/well components, production fluid, measurement, etc., can solve problems such as misjudgment, water distributor stuck, and unrecoverable docking claw.

Active Publication Date: 2020-04-10
NORTHEAST GASOLINEEUM UNIV
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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 a docking signal at the tubing collar, packer, etc., which may easily cause misjudgment and may lead to inaccurate positioning deviation from the water distributor
In addition, the positioning adjustment mechanism used in the existing measuring and adjusting instrument still has the following problems: when the parts in the instrument fail, the docking claws of the positioning adjustment mechanism cannot be retracted, resulting in being stuck with the water distributor, and the experiment cannot be continued; Due to the movement of the docking claw, the exact docking position with the water distributor cannot be determined

Method used

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Experimental program
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Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing:

[0025] This kind of downhole positioning and adjusting arm includes a card arm bin 1, and the card arm bin 1 includes a left arm device 3, a right arm device 4, a cam 5, an arm screw 6, a spring 7, a mandrel 10, a copper coupling 11, etc. main part.

[0026] Such as figure 1 and image 3 As shown, the spring 7 is located at the inner end of the U-shaped groove 2 of the card arm compartment, and the set screws 8 are installed at the bottom of the left and right arm devices to block the spring 7. The set screws 8 give the spring 7 compression during the retraction process of the adjusting arm. The spring 7 makes the spring 7 have elastic force; during the extension process, due to the elastic force of the spring 7, a lateral force in the spring 7 ejection direction is given to the set screw 8. exist figure 1 , 3 In 6, the shape and size of the square through hole 20 insi...

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Abstract

A down-hole positioning adjusting arm comprises a left arm device, a right arm device, a cam, an arm connecting screw, a spring, a mandrel and a copper coupler. The left arm device and the right arm device are connected in the mode that the arm connecting screw penetrates through annular through holes in the side faces of the two arm devices, a cam mechanism is arranged in inner grooves of the twoarm devices, the cam is in threaded connection with the mandrel through a shaft connecting screw, and the mandrel and a motor are connected through grooves in the upper end and the lower end of the copper coupler, so that the motor, the copper coupler, the mandrel and the cam rotate synchronously. Magnetic steel is mounted in two adjacent holes in the outer surface of the copper coupler, a Hall element is mounted at a corresponding position in a straight groove of the side face of a motor shell, and the Hall element is used for generating an induction signal through induction with the magnetic steel. The adjusting arm can be retracted under the manual operation of a user, and the moving position and condition of the adjusting arm can be monitored in real time.

Description

technical field [0001] The invention relates to a positioning adjustment mechanism applied in the technical field of downhole docking measurement and adjustment. Background technique [0002] At present, water flooding technology is widely used in oilfields. Water flooding wells need to use downhole measuring and adjusting instruments to adjust the injection flow rate of water distributors in each layer. When adjusting, the downhole measuring and adjusting instrument first connects with the water distributor in the water well string, and then adjusts the water distributor, so as to control the water injection volume of the layer. How to judge whether the test and adjustment instrument is successfully connected with the water distributor plays an important role in the success of the test and adjustment and ensuring the effect of the test and adjustment. The traditional docking judging method is to generate a docking signal through the axial movement of the docking claw or ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B47/00
CPCE21B43/20E21B47/00
Inventor 任福深刘扬王中杨王宝金孙鹏宇范玉坤
Owner NORTHEAST GASOLINEEUM UNIV
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