Insulating pup joint used for underground mine drilling and manufacture method thereof

A technology of insulating pup joints and manufacturing methods, applied in the direction of drill pipes, drill pipes, drilling equipment, etc.

Inactive Publication Date: 2012-01-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no insulatin...

Method used

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  • Insulating pup joint used for underground mine drilling and manufacture method thereof
  • Insulating pup joint used for underground mine drilling and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Both the puppet body and the protection joint are made of 40Cr steel. The length of the puppet body is 70cm, the outer diameter is 69mm, and the inner diameter is 40mm. The length of the protection joint is 15cm, the outer diameter is 77mm, and the inner diameter is 35mm. The inner surface, outer surface and end surface of the pup joint body are coated with tungsten carbide ceramic insulating material layer, the Rockwell hardness is 70HRC, and the thickness of spraying is 0.5mm. The inner diameter of the cylindrical plastic template A is 74 mm and the length is 10 cm, and the outer diameter of the cylindrical plastic template B is 35 mm and the length is 10 cm. Use these two templates to pour hard glue and diamond with a thickness of 2 mm on the wear-resistant ceramic insulating material layer on the inner surface of the pup body and on the wear-resistant ceramic insulating material layer on the outer surface of the pup body that is not in contact with the protective joi...

Embodiment 2

[0058] Both the pup joint body and the protection joint are made of 45 steel. The length of the pup joint body is 60cm, the outer diameter is 55mm, and the inner diameter is 41mm. The length of the protection joint is 20cm, the outer diameter is 64mm, and the inner diameter is 36mm. The inner surface, outer surface and end surface of the pup joint body are coated with alumina ceramic insulating material layer, the Rockwell hardness is 75HRC, and the thickness of spraying is 0.8mm. The inner diameter of the cylindrical plastic formwork A is 60mm and the length is 12cm, and the outer diameter of the cylindrical plastic formwork B is 36mm and the length is 12cm. These two templates are used to pour 1.7mm thick hard glue and For the diamond particle mixed material layer 4, the volume ratio of diamond particles and glue is 1:3, the thickness of diamond particles is 100 mesh, the colloid is BD706, and its shear strength is 30 MPa. The two protective joints are fixedly connected wit...

Embodiment 3

[0060] Both the puppet body and the protection joint are made of 45 steel. The length of the puppet body is 70cm, the outer diameter is 84mm, and the inner diameter is 62mm. The length of the protection joint is 25cm, the outer diameter is 92mm, and the inner diameter is 62mm. The inner surface, outer surface and end surface of the pup body are coated with doped ZrO 2 and TiO 2 Al 2 o 3 The ceramic material layer based on the rockwell hardness is 82HRC, and the thickness of spraying is 0.9mm. The inner diameter of the cylindrical plastic formwork A is 89mm and the length is 10cm, and the outer diameter of the cylindrical plastic formwork B is 62mm and the length is 10cm. Use these two templates to pour hard glue with a thickness of 1.6mm and For the diamond particle mixed material layer 4, the volume ratio of diamond particles and glue is 1:2, the thickness of diamond particles is 110 mesh, the colloid is Loctite 4212, and its shear strength is 25-29 MPa. The two protecti...

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Abstract

The invention discloses an insulating pup joint used for underground mine drilling and a manufacture method thereof. The insulating pup joint at least comprises a hollow pup joint body and two hollow protection joints, wherein the hollow protection joints are respectively arranged on two ends of the pup joint body and are fixedly connected with the pup joint body; the inner surface, the outer surface and the end surface of the pup joint body are all coated with a wear-resisting ceramic insulating material layer; and the wear-resisting ceramic insulating material layer of the inner surface of the pup joint body and the wear-resisting ceramic insulating material layer on the outer surface of the pup joint body, which does not contact with the protection joints are coated with a hybrid material layer of ebonite and diamond particles. In the manufacture method, the pup joint body and two protection joints are firstly manufactured, and then, the two protection joints are respectively fixedly connected to two ends of the pup joint body. The insulating pup joint can be applied to the underground electromagnetic wave measurement while drilling in the underground mine industry to cause an upper drill pipe and a lower drill pipe to insulate. The manufacture method can be used for manufacturing the insulating pup joint suitable for underground electromagnetic wave measurement while drilling in the underground mine industry.

Description

technical field [0001] The invention relates to an insulating pup joint for geological and mineral drilling and a manufacturing method thereof, belonging to the field of geological and mineral drilling. Background technique [0002] The amount of geological and mineral drilling is increasing day by day. In order to improve the quality of holes and reduce the cost of drilling, electromagnetic wave measurement while drilling technology has been introduced. The electromagnetic wave measurement while drilling technology requires an insulating nipple to separate the drill string into two sections, so that the upper drill pipe, the formation and the lower drill pipe form an electrical circuit. Due to the small caliber of the drilling hole and the complex formation while drilling, and most of them are hard rocks, it is required that the insulated drill pipe pup joint has a small caliber and high wear resistance. In the prior art, there is no insulating pup joint for geological and...

Claims

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Application Information

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IPC IPC(8): E21B17/042E21B17/10B32B33/00
Inventor 邵春陈鹏飞
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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