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A drop-in drill pipe gauge and its application method

A caliper and input technology, applied in the field of petroleum exploration, can solve the problems of inability to detect the residue of mud cake on the wall surface, inability to adapt well to conventional variable diameter drill pipes, etc. Simple to use effects

Active Publication Date: 2022-04-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents are not well adapted to the inner diameter of conventional variable-diameter drill pipes, nor can they detect the residual mud cake on the wall surface of the larger inner diameter section of a single variable-diameter drill pipe

Method used

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  • A drop-in drill pipe gauge and its application method
  • A drop-in drill pipe gauge and its application method
  • A drop-in drill pipe gauge and its application method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0086] Throw the device into a vertical or inclined drill pipe, and the device will fall under the action of gravity. If it encounters obstacles during the fall and fails to reach the exit at the bottom of the drill pipe, it means that the drill pipe does not meet the requirements for entering the well. The working area is moved to the non-working area for follow-up treatment, and the inner wall surface is cleaned before entering the well.

example 2

[0088] Throw the device into a vertical or inclined drill pipe, and the device will fall under the action of gravity. If there is no resistance during the falling process, the whole device will go down smoothly to the bottom exit of the drill pipe, and the touch rod will touch the ground. The limit of the sliding sleeve is released, the fixing of the support plate is released, and the support plate gradually gathers along the inner diameter of the drill pipe. The whole device can be smoothly taken out from the lower water hole of the drill pipe, indicating that the inner diameter of the drill pipe is normal, which meets the requirements for running into the well, and can be put into the well.

[0089] After the present invention enters the water eye at the high-end side of the drill pipe, the relative position of the sliding sleeve and the shaft is fixed by the locking pin, so that the rigid support piece is set to open a suitable angle and close to the wall surface of the diame...

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Abstract

The invention provides an input-type drill pipe drift gauge and a using method thereof, which belong to the field of petroleum exploration. The drop-in drill pipe gauge includes a coaxial shaft, a sliding sleeve, a guide head, and a support structure; the upper end of the guide head is connected to the lower end of the shaft; the sliding sleeve is installed on the shaft, and can slide up and down along the shaft body; a shaft limit hole is provided on the shaft body; a sliding sleeve limit hole is provided on the sliding sleeve; one end of the support structure is connected with the lower end of the sliding sleeve, and the other end It is connected with the end surface of the upper end of the guide head; when the sliding sleeve slides down along the shaft, the supporting structure is stretched, and when the sliding sleeve slides upward along the shaft, the supporting structure is closed. The device can well solve the defect that the existing drift gauge cannot detect the wall surface of the drill pipe inner cavity with a certain thickness of mud cake adhered to, to ensure the inner cavity of the drill pipe is clean and unimpeded to the greatest extent, and reduce the risk of blockage when entering the well; the device Modular design, simple structure, low cost and high reliability.

Description

technical field [0001] The invention belongs to the field of petroleum exploration, and in particular relates to an input-type drill pipe drift gauge and a using method thereof. Background technique [0002] Existing drill pipe diameter gauges cannot well adapt to the inner diameter of conventional variable diameter drill pipes. The existing diameter gauge must first ensure that its maximum outer diameter must be smaller than the water hole at the screw thread at both ends of a single variable diameter drill pipe. inner diameter, and then enter the inner cavity of the drill pipe with a larger inner diameter. Since the inner diameter of the inner cavity is much larger than the outer diameter of the existing conventional drift gauge, if there are mud cakes to varying degrees on the wall of the inner cavity of the drill pipe, as long as the existing flow gauge If the diameter gauge can pass through smoothly, the residual mud cake cannot be effectively detected, and the drill pi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 初永涛张晋凯周仕明甘新星肖京男张林海方春飞
Owner CHINA PETROLEUM & CHEM CORP
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