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DATE OF LAST YEARS COUNT |
UNITED STATES |
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1769 |
+5 |
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1301 |
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3/2013 |
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4/2012 |
World Oilfield Forum
Just put a National 610 D.W. on and it has hydraulic catheads and the torque gauges it has on it is in PSI and kpa instead of ft/lbs, I tried looking up a converson for psi & kpa to ft/lbs but everywhere I looked it says it not compatiable. Anyone know anything about it?
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Permalink Reply by Ahmed Bakheet on Dear Dustin
Psi (lb/in2) is pressure unit and ft/lb is torque unit, to find the relation you have to check the machine manual e.g. hydraulic power tong is gauge is measured by pressure but with some inputs like gear number follow the chart and will give you the torque value.
Regards
Well I got a psi to ft/lbs graph from OWI, haven't had a chance to check it against the line pull gauge as we have been using the st-80 that was put on at the same time but will give it a go on next well. Thanks for everyones help!!
Permalink Reply by roberto ruiz gonzalez on hi, dustin. how do you do. nice to michyou. well the conversion when i m used to work whit the presure of gauge is 6.896KpA= 1 psi. this is> 15 psi= 6.896kpa/1 psi x 15psi = 91kpa.
the other conversion is torque in ft/lb. 1 ft/lb=1.36kN, in this form 300 ft/lb = 1.36kn/1 ft/lb x 300 ft/lb = 390kN
this is the pull to joint the tp.
Permalink Reply by Jay Brown on What ever happened to pressure times tong length like we used to do it? Not sure if I ever had a gauge that read in torque (since the gauge don't know what tongs are there).
Heres a copy of what I was given, it works good except it doesn't tell you how to figure for double line pull but we are still using a line pull gauge and torquing 4 1/2 xh dp only requires 150 psi on double line on the break out tongs compared to the 1200 psi single line on the make up tongs. And on the formula the torque (lbs.ft) = line pull (lbs) x 4ft. (tong length) is suppose to be divide not times, just a slight misprint there!!!
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