Jining Donghong Machinery Co., Ltd
Quality supplier of drilling rig parts for Bomco,Lanzhou LS, Honghua, Sj petro, Rg Petro, Beijing BPM, Shenkai, Kingdream, CCDC

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Kelly Valve 
Brand: 0012
Present point: 0
Point offset: 0.0
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Kelly Valve


Introduction:

Kelly valve is a manually operated ball type valve for the drill stem, divided into upper and lower sections. The upper Kelly valve is connected between lower end of swivel and upper end of Kelly. The lower Kelly valve is connected between upper end of drill pipe and lower end of Kelly or lower end of Kelly saver subs. The Kelly valve   can   be opened or closed off by simply turning a special operating wrench 90° according to indicated direction.


Sealing principle:

The sealing principle for Kelly valve is to ensure a close seat between the ball and the ball seat. The lower seat is supported by a spring. The force provided by the spring keep the ball securely in place with lower seat. During normal drilling operation, the hole is kept unblocked by turning the stem to “on” position; In case of kick or blowout, turn the operating stem to “off” position to close off the internal bore of drill string, the kick or blowout accident is avoided due to a high pressure sealing situation betweenball and the ball seat.


Type of kelly valve:

upper kelly valve, lower kelly valve


Available model:

CS146K CS200K XS105K XS121K XS127K XS140K XS159K XS165K XS178K


When ordering please specify:

●Upper or Lower type;

●Tool OD;

●Working pressure: 5,000 / 10,000 / 15,000 psi;

●Tool connection.




Specifications - upper Kelly valve

1   upper kelly valve   CS 146K   146   4 1/2 REG   50   68.6

  2   upper kelly valve   CS 200K   200   6 5/8 REG   76.2   68.6



Specifications - Lower Kelly valve

  1   lower kelly valve   XS105K   105   NC31   40   68.6

  2   lower kelly valve   XS121K   121   NC38   44.5   68.6

  3   lower kelly valve   XS127K   127   NC38   44.5   68.6

  4   lower kelly valve   XS140K   139.7   NC40   57.2   68.6

  5   lower kelly valve   XS159K   159   NC46   61   68.6

  6   lower kelly valve   XS165K   165   NC46   61   68.6

  7   lower kelly valve   XS178K   178   NC50 , 5 1/2 FH   71.4   68.6