US 11,781,542 B2
Rod rotator assembly for well pumping rod strings
Nicolás Gayubas, Buenos Aires (AR); and Martin Ruiz Palero, Buenos Aires (AR)
Assigned to DALTEC OIL TOOLS SRL, Buenos Aires (AR)
Filed by DALTEC OIL TOOLS SRL, Buenos Aires (AR)
Filed on May 5, 2022, as Appl. No. 17/737,433.
Prior Publication US 2022/0412339 A1, Dec. 29, 2022
Int. Cl. F04B 47/02 (2006.01); E21B 43/12 (2006.01); E21B 17/10 (2006.01); F04B 47/12 (2006.01)
CPC F04B 47/026 (2013.01) [E21B 17/1071 (2013.01); E21B 43/127 (2013.01); F04B 47/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rod rotator assembly for well pumping rod strings of the type comprising a mechanical rod rotator and an actuating mechanism for the rod rotator, wherein the actuating mechanism has a lower part mounted around a first sucker or polished rod and an upper part connected to said rod rotator which is provided with a pivoting lever that rises and falls capable of rotating an internal mechanism of the rotator during up and down movement of the pivoting lever to rotate an upper rotator cover, which upper rotator cover in turn rotates an upper coupling or clamp of said first sucker or polished rod, to rotate the string of rods,
wherein the actuating mechanism comprises,
at least one tube having a top part connected to said pivoting lever, and a bottom part,
height-adjusting means guided and telescopically extending along an interior of the at least one tube to be selectively fixed between different height adjustment positions, to reciprocally actuate said at least one tube,
a fixing element passing through the at least one tube and said height adjustment means to fix said height-adjusting means to the at least one tube in a desired position,
at least one fork-shaped guide element having a fork part removably extending around the rod string and a fork base connected to a bottom part of the height-adjusting means and,
damping elements located at said fork part around the rod string, and
wherein, said rod rotator has at least one stop means comprising an auxiliary arm which has a first end mounted on a pivot point of the pivoting lever of said rod rotator and a free end that comes into operative contact with a stop arranged on a side of said rod rotator.