F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142, 166/62
F04B 47/02 (2006.01) F04B 53/14 (2006.01)
Patent
CA 1200436
"SUCKER ROD COUPLING" ABSTRACT OF THE DISCLOSURE An improved sucker rod coupling is provided for use in a rod string in a pumping oil well. An elongate, cylindrical body member is utilized. This member has internally threaded, longitudinal bores at each end thereof, for connection with the sucker rods which it is to join. Transversely extending, substantially diametric, longitudinally spaced apart, vertical slots are formed in the mid-portion of the body member. A wheel is mounted on a horizontally extending pin within each slot, for rotation therein. A portion of the wheel protrudes beyond each side of the body member, to thereby provide an anti-friction roller for the coupling when it contacts and slides against the surrounding tubing wall during reciprocation of the rod string. Preferably the wheel is spaced from the side walls of the slot, so as to be movable laterally within the slot. This arrangement permits the wheel to shift back and forth on its pin, to thereby expel sand and wax building up between the wheel and the slot walls. Additionally, the wheel is preferably manufactured of a lubricious material, such as nylon, so as not to score the tubing, and is formed with a lenticular configuration. This configuration appears to have the benefit of assisting in expelling sand and wax from the wheel slot. The coupling is effective to provide a long-lasting, anti-friction, centralizing means, which means are self-cleaning and thus do not readily seize up by clogging with sand and wax in the oil.
478526
Diversified Drilling Services Ltd.
Johnson Ernest Peter
LandOfFree
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