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US 4,221,269 AGranted
Pipe spinner
OwnerRay E. Hudsoninventor
Life of this patent
Estimating the term…
Abstract
A pipe spinner for spinning drill pipe as used to dig deep wells includes a yoke with a torque arm. Three self-contained rotary hydraulic motors having urethane coated rollers on the exterior thereof are mounted upon the spinner, one in the central area of the yoke and one each on a swing arm pivoted to the end of the legs on the yoke. Hydraulic fluid for the three motors is supplied and removed axially thereof. The hydraulic fluid conduits are made flexible at the pivots.
Claims14
A pipe spinner for spinning pipe comprising:
- a. a main yoke having a central area,
- b. a right leg angling forward and to the right of the central area,
- c. a left leg angling forward and to the left of the central area,
- d. a torque arm tab extending directly back from the central area,
- e. a torque arm bolted to the torque arm tab,
- f. a pivot at the extreme end of the right arm,
- g. a pivot at the extreme end of the left arm,
- h. a swing arm pivoted to each pivot,
- j. said swing arm having an ear extending on the outside,
- k. a rotary hydraulic motor on the pipe side of said swing arm,
- m. a hydraulic cylinder having one end pinned to the torque arm tab and having a rod extending from the other end,
- n. said rod pinned to the swing arm ear,
- o. said tab pin, said ear pin, said pivot and said rotary motor axis all being parallel,
- p. a rotary hydraulic motor at the central area of the yoke and the axis of all of said motors being parallel.
11 more elements
Dependencies are inferred from the claim text.