Throw-in type drill rod drift diameter gauge and application method thereof

An investment-type, caliper technology, applied in the field of petroleum exploration, can solve the problems such as the inability to adapt to conventional variable diameter drill pipes, and the inability to detect the residual mud cake on the wall. Simple to use effect

Active Publication Date: 2019-12-10
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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  • Throw-in type drill rod drift diameter gauge and application method thereof
  • Throw-in type drill rod drift diameter gauge and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0068] Throwing the device into the water hole at the high-end side of the drill pipe placed vertically or inclined at a large angle without initial velocity can ensure that the device can fall freely inside the drill pipe. The device falls under gravity. If it encounters obstacles during the fall , failing 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, and needs to be moved from the working area to the non-working area for follow-up treatment, and the inner wall surface can be cleaned before entering the well.

example 2

[0070] Throwing the device into the water hole at the high-end side of the drill pipe placed vertically or inclined at a large angle without initial velocity can ensure that the device can fall freely inside the drill pipe. The device falls under gravity. Then the whole device goes down to the bottom outlet of the drill pipe smoothly. At this time, the guide head and the buffer spring drill out the low-end water hole. The buffer spring touches the ground first, and then the lower pin drills out the low-end water hole. The lower water hole was taken out smoothly, which indicated that the inner diameter of the drill pipe was normal, which met the requirements for running into the well and could be put into the well.

[0071] Except for the rubber oil bag, the device is made of metal, or other materials with the same strength as the metal. This device does not make specific requirements on the size of each part of the device, but only provides the idea of ​​the device. It adopts ...

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Abstract

The invention provides a throw-in type drill rod drift diameter gauge and an application method thereof, and belongs to the field of oil exploration. The device comprises a center shaft and a sealingsleeve sleeving the center shaft, wherein a sealing space is formed between the inner wall of the sealing sleeve and the outer wall of the center shaft; liquid is fully filled in the sealing space; and when a force along the axial direction of the center shaft is applied to the sealing sleeve, the outer diameter of one part on the sealing sleeve can be enlarged. According to the device, the problem that an existing drift diameter gauge cannot detect a mud cake with a certain thickness and other similar adherent objects adhered to the wall surface of a diameter enlargement section of an inner cavity of a drill rod can be solved, the inner cavity of the drill rod is ensured to be clean and smooth to the utmost extent, and the risk of entering a well and being blocked is reduced; the device adopts modular designing and assembling, the sizes of various parts are flexibly designed, the various parts are flexibly combined, so that the size requirements of drill rods with different specifications on site can be met to the utmost extent, and the aim of the drift diameter is achieved; the application method of the device is simple and high in reliability; and the device is easy to process and low in cost.

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] The existing drill pipe diameter gauge cannot be well adapted to the inner diameter of the conventional variable diameter drill pipe. 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/00
CPCE21B31/00
Inventor 张晋凯周仕明甘新星初永涛肖京男方春飞张林海
Owner CHINA PETROLEUM & CHEM CORP
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