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Hebei Shitan Machinery Manufacturing Co., Ltd.

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Double-wall drilling tools
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Double-wall drilling tools

Double-wall drilling tools include double-wall gas faucets or gas boxes, double-wall active drill rods, double-wall drill rods, double-wall drill collars, gas-water mixers, positive and negative conversion devices and connection joints. The double-wall drilling tool is suitable for both gas lift reverse circulation drilling and air reverse circulation drilling. The gas lift reverse circulation drilling process has high drilling efficiency, long bit life, good well quality, and drilling in complex formations. The drilling is safe and reliable, and can achieve continuous sampling (core) drilling, saving auxiliary time and reducing labor intensity, etc.; the air reverse circulation drilling process has low air consumption, fast rock cutting back speed, strong ability to carry cuttings, and holes The bottom is clean, the drilling efficiency is high, and the drilling stability is good.
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Double-wall drilling tools include double-wall gas faucets or gas boxes, double-wall active drill rods, double-wall drill rods, double-wall drill collars, gas-water mixers, positive and negative conversion devices and connection joints. The double-wall drilling tool is suitable for both gas lift reverse circulation drilling and air reverse circulation drilling. The gas lift reverse circulation drilling process has high drilling efficiency, long bit life, good well quality, and drilling in complex formations. The drilling is safe and reliable, and can achieve continuous sampling (core) drilling, saving auxiliary time and reducing labor intensity, etc.; the air reverse circulation drilling process has low air consumption, fast rock cutting back speed, strong ability to carry cuttings, and holes The bottom is clean, the drilling efficiency is high, and the drilling stability is good.

 

The double-wall drill rods are available in conventional and external flat styles. Various specifications are complete, and can be used with various rotary table and power head drills. The outer pipe of the conventional double-wall drill pipe adopts API standard thread connection, the outer pipe of the large-diameter conventional double-wall drill pipe adopts a special buckle connection, the outer pipe of the outer flat double-wall drill pipe adopts a special buckle connection, and the inner pipe adopts the belt Sealed plug-in connection. The drilling tool has a reasonable structure and a reliable seal. It is widely used in water wells, geothermal wells, dry hot rock wells, shale gas wells, coalbed methane wells, mine rescue rescue holes, gas discharge wells, large-diameter engineering construction and large-diameter pile foundation construction. Users require customized non-standard specifications.

 

Double-wall drill rod specifications

 

Drill rod form

Drill rod specifications

Outer tube outer diameter mm

Outer tube wall thickness mm

RSC type

Conventional

SG89/40

89

9.35/10

NC38

SG114/60

114

8.56

NC50

SG 127/60

127

9.19/10

NC50

SG 139.7/70

139.7

10.54

51/2FH

SG 146/90

146

10

51/2IF

SG 168/100

168

10

Special button type

SG 178/110

178

11

Special button type

SG 219/150

219

8.5

Special button type

Outside flat

WPSG73/32

73

9

Special button type

WPSG89/40

89

9.35

Special button type

WPSG114/60

114

8.56

Special button type

 

Double-wall active drill rod specifications

 

Square drill pipe specifications

full length m

Outer diameter mm

Internal thread type

External thread type

FSG108×108/60

12.534

168.0

NC50-LH

NC50   

FSG133×133/60

12.534

196.8

65/8FH-LH

NC50

FSG133×133/70

12.534

196.8

65/8REG-LH

51/2FH

FSG170×170/130

12.19

241.0

85/8REG-LH

85/8REG

 

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800 Zhongshan West Road, Shijiazhuang, Hebei Province

+86 13833170657 

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Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd is subordinated to Hebei Geology and Mineral Industries Department. As the designated production enterprise, Hebei Shitan Machinery Manufacturing Co., Ltd specialized in manufacturing drilling equipment and auxiliary tools. It is a member of China Mining Association,
See more information
Established in 1975, Hebei Shitan Machinery Manufacturing Co., Ltd is subordinated to Hebei Geology and Mineral Industries Department. As the designated production enterprise, Hebei Shitan Machinery Manufacturing Co., Ltd specialized in manufacturing drilling equipment and auxiliary tools. It is a member of China Mining Association,

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