Centering spinning for down hole tubulars
AssigneeW-N Apache Corporation
InventorLee R. Hodge
Life of this patent
Estimating the term…
Abstract
A centering spinner for centering and spinning down hole tubulars having a range of diameters. The centering spinner includes a frame capable of admitting a down hole tubular therein and a plurality of roller assemblies pivotally coupled to the frame to converge upon and center the down hole tubular. According to a further feature, adjacent rollers of the roller assemblies of the centering spinner are axially displaced with respect to a down hole tubular retained therein.
Claims31
A centering spinner for centering and spinning down hole tubulars having a range of diameters comprising:
- a frame capable of admitting a down hole tubular therein, and
- a plurality of convergeable roller assemblies coupled to said frame for pivotal independent movement in relation therewith whereby a down hole tubular having a diameter within a large range of diameters can be centered and spun by said plurality of convergeable roller assemblies.
A centering spinner for down hole tubulars having a range of diameters comprising:
- a frame capable of admitting a down hole tubular,
- a first roller arm assembly pivotally coupled to said frame on one side of said frame,
- a second roller arm assembly pivotally coupled to said frame on the same side of said frame as said first roller assembly,
- a third roller arm assembly pivotally coupled to said frame on a side of said frame opposite said first roller arm assembly,
- a fourth roller arm assembly pivotally coupled to said frame on the same side of said frame as said third roller arm assembly,
- means for converging said roller arm assemblies, said converging means connected to said first roller arm assembly, said second roller arm assembly, said third roller arm assembly, and said fourth roller arm assembly, and
- means for spinning a down hole tubular, said spinning means connected to at least one roller arm assembly whereby a down hole tubular can be centered and spun.
A centering spinner for down hole tubulars having a range of diameters comprising:
- a frame capable of admitting a down hole tubular, and
- a plurality of convergeable roller assemblies coupled to said frame, said plurality of convergeable roller assemblies including a plurality of rollers that can center and spin a down hole tubular in the opening in said frame, and further wherein adjacent rollers are displaced from each other in the direction of the axis of a down hole tubular retained therein, whereby a down hole tubular having a diameter in a wide range of diameters can be centered and spun.
A centering device for down hole tubulars having a range of diameters comprising:
- a frame with an opening capable of admitting a down hole tubular, and
- a plurality of convergeable roller assemblies coupled to said frame and further in which said plurality of convergeable roller assemblies are adapted to converge from more than two directions upon a down hole tubular admitted in said frame.
A centering device for down hole tubulars having a range of diameters comprising:
- a frame with an opening capable of admitting a down hole tubular, and
- a plurality of convergeable roller assemblies coupled to said frame and adapted to converge upon and center the down hole tubular admitted in said frame, and further in which said plurality of convergeable roller assemblies are axially staggered.
Dependencies are inferred from the claim text.