F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142
F04B 47/02 (2006.01)
Patent
CA 1201327
"PUMP JACK FOR SLANT WELLS" ABSTRACT OF THE DISCLOSURE The pump jack is of conventional API front-mounted geometry Class III configuration, but is provided with an angularly disposed walking beam, so as to be able to pump a slant rod string. To incorporate versatility into the unit so that a single model can be used with different wells having different angularities, there is provided: means for altering the effective length of the Pitman arms (so that the angularity of the walking beam is changed, which permits the unit to be used with a rod string having a different slant); means for bringing the counterweight into phase with the well load; and means for altering the stroke length.
422872
Haverstock Wayne
Krywchuk David
Masak Peter
Johnson Ernest Peter
Universal Industries Ltd.
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