Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1980-09-16
1982-08-31
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5739, B25B 1350
Patent
active
043466311
ABSTRACT:
A device for turning a section of well pipe to connect it to or disconnect it from a pipe string includes a power unit to be mounted at a side of a well and having a part, preferably a piston, which is power actuable in opposite directions, with that part acting upon movement in one direction to exert a pulling force on a flexible line connected to a tong for turning the pipe section, and with the specified part acting upon movement in the opposite direction to exert pulling force on a second elongated flexible element, preferably a chain, which extends about the pipe section and acts to spin it rotatably when the chain is pulled. The spinning element is desirably directed along a multiple reversing path giving that element increased longitudinal movement as compared with the tong actuating line for a predetermined length of movement of the piston, so that the spinning element can turn the pipe through a relatively large number of revolutions whereas the tong actuating line moves a shorter distance but can apply a greater torque to the pipe.
REFERENCES:
patent: 1615695 (1927-01-01), Grattan
patent: 1736009 (1979-11-01), Nixon
patent: 1826760 (1931-10-01), Foster
patent: 2089800 (1937-10-01), Jones
patent: 3516308 (1970-06-01), Ham et al.
patent: 3518903 (1970-07-01), Ham et al.
patent: 3692123 (1972-09-01), Gyongyosi
patent: 4253354 (1981-03-01), Walker
Drilco, "Ezy Torq" Hydraulic Cathead, 9-1-68, pp. 1-4.
Crews, S. T., Ezy Torq Hydraulic Cathead Insures High Make-Up Torques for Large Size Connections, Drilco, 4-15-69.
Green William P.
Jones Jr. James L.
Varco International, Inc.
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