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US 2003/0164071 A1Published application
Spinner device
AssigneeNational Oilwell Norway AS
InventorsMagne Moe, Per Olav Haughom, Jorn Pollestad
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AssigneeNational Oilwell Norway AS
InventorsMagne Moe, Per Olav Haughom, Jorn Pollestad
Estimating the term…
In spinner tongs, a so-called spinner (30), incorporated in an iron roughneck and thus serving to rotate a drill pipe during connection thereof to a drill string or during division of the drill string into individual pipes, the aim has been to reduce damage on the threaded connections (the pin-and-box joints) in the screwing/unscrewing operations. This is realized in an operation for the simultaneous centring and rotating of the drill pipe. Four spinner rollers (42) known in themselves, which are brought to bear on the drill pipe when surrounding it, are mounted according to the invention, preferably in pairs, at the outer ends of driven clamping arms (46), by bogies (50). At their opposite outer ends the clamping arms (46) are pivotally supported on a fixed frame part/structure (56) and are jointed to each other by means of a piston and cylinder (48) driven by pressure fluid and arranged to carry the clamping arms (46) towards and away from each other. For their forced centring the clamping arms (46) have a centring stay (58) arranged thereto, which is connected by its outer end to one clamping arm (46), and is connected by its other outer end to the other clamping arm (46). For the parallel displacement of the rollers (42), each bogie (50) has a parallel stay (54) arranged thereto, whose other end is supported on a fixed frame part/structure (56).
A spinning tong/spinner device of the kind incorporated in an iron roughneck, for use in screwing/unscrewing operations in connections with pin-and-box joints/threaded connections (22a,22b) of drill pipes (22) for the formation of a continuous drill string (24), and for the division thereof into individual pipes/sections/lengths (22) after use, respectively, comprising preferably four rotatable, driven spinner rollers (42) arranged to a aligning/guiding device (68, 66) for the vertical direction and formed to impart a rotary motion to the drill pipe (22), characterized in that the spinner rollers (42) are mounted, preferably in pairs, through bogies (50) or similar intermediate elements to driven clamping arms (46) movable towards and away from each other, there being mounted between said clamping arms (46) and jointed thereto, an actuator, for example a piston and cylinder (48) driven by pressure fluid, which effects the forced motion of the clamping arms (46), the clamping arms (46) having, for forced centring, a common centring stay (58), whereas a parallel stay (54) is arranged to each of the bogies (50) for the parallel displacement of the rollers (42).
A device according to any one of the preceding claims, characterized i n that the spinner unit (30) is arranged to be moved vertically along guides or guide rails (66).
Dependencies are inferred from the claim text.