1
Swoboda Jr John J, Swoboda Norman L: Racking arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations. Richards Harris & Medlock, October 8, 1974: US3840128 (124 worldwide citation)

The specification discloses a racking arm having a telescoping boom with a supported end and a free cantilevered end. A pipe gripping head is secured to the cantilevered end of the boom for clamping about elongated members such as pipe sections, drill collars, riser pipes or the like. The supported ...


2
Swoboda Jr John J, Swoboda Norman L: Raching arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations. Richards Harris & Medlock, May 27, 1975: US3885679 (76 worldwide citation)

The specification discloses a racking arm having a telescoping boom with a supported end and a free cantilevered end. A pipe gripping head is secured to the cantilevered end of the boom for clamping about elongated members such as pipe sections, drill collars, riser pipes or the like. The supported ...


3
Swoboda Jr John J, Swoboda Norman L: Racking arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations. Richards Harris & Medlock, May 13, 1975: US3883009 (39 worldwide citation)

The specification discloses a racking arm having a telescoping boom with a supported end and a free cantilevered end. A pipe gripping head is secured to the cantilevered end of the boom for clamping about elongated members such as pipe sections, drill collars, riser pipes or the like. The supported ...


4
Swoboda Jr John J, Swoboda Norman L: Constant tensioning system. November 9, 1971: US3618897 (10 worldwide citation)

A winch drum or capstan or the like upon which a load-bearing cable or rope is reeled is operated by an hydraulic, hydrostatic transmission through a suitable gear reduction. The transmission is adjustable as to direction as well as output rate by means of a feedback system including a servomotor or ...


5
Swoboda Jr John J, Swoboda Norman L: Racking arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations. Richards Harris & Medlock, April 1, 1975: US3874518 (7 worldwide citation)

The specification discloses a racking arm having a telescoping boom with a supported end and a free cantilevered end. A pipe gripping head is secured to the cantilevered end of the boom for clamping about elongated members such as pipe sections, drill collars, riser pipes or the like. The supported ...