Dongying Kaihao Petroleum Equipment Co. Ltd._Kelly cock valve
 
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Kelly cock valve

 

Name: Kelly cock valve

Brief introduction

Kelly cock valve is a manual control valve in drilling string cycle system .It is one of the effective tools for preventing blowout. It is divided into upper kelly cock valve and lower kelly cock valve. .Upper kelly cock is located at the position between lower end of swivel and the top of kelly stem. Lower kelly cock is located at the position between lower end of kelly stem and drilling rod or kelly stem saver sub. With special spanner according to instruction and requirement to roll operational key 90 degree, so that can achieve to open and close .In order to avoid blowout,it should be assembled kelly cock valve on two ends of kelly stem.

Specifications:  

 Upper parts

Model  

O.D(mm)

Water eyes  diameter (mm)

connection thread

LH

Working pressure (Mpa)

 Range

 

CS146

146

50

4 1/2REG-LH

35   70   105

Square kelly and hexagon  kelly

 

 

CS200

200

76

6 5/8REG-LH

35   70   105

 

 lower parts

Model  

O.D(mm)

Water eyes  diameter (mm)

connection thread

LH

Working pressure (Mpa)

 Range

 

XS105

105

41

NC31

35   70   105

Square kelly and hexagon  kelly

 

 

XS121

121

50

NC38

35   70   105

XS127

127

50

NC38

35   70   105

XS165

165

61

NC46

35   70   105

XS178

178

71

NC50  5-1/2FH

35   70   105

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