Apparatus for connecting and disconnecting threaded members

Details Apparatus for connecting and disconnecting threaded members Apparatus for connecting and disconnecting threaded members

1989-11-27

1992-01-21

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5734, B25B 1350

Patent

active

050818880

ABSTRACT:
Apparatus for connecting and disconnecting threaded members including a power tong, a backup unit disposed below the power tong for gripping a second pipe, and apparatus for transmitting reaction forces generated by the power tong to the backup unit, the backup unit having devices for transmitting compressive or tensile forces between its members from the power tong which, in one embodiment, includes a hydraulic connection between a double acting hydraulic piston and cylinder assemblies incorporated in the members.

REFERENCES:
patent: 2737839 (1956-03-01), Paget
patent: 3288000 (1966-11-01), Foster
patent: 3516308 (1970-06-01), Ham et al.
patent: 3722331 (1973-03-01), Radulescu
patent: 3838613 (1974-10-01), Wilms
patent: 4061194 (1977-12-01), McCanse
patent: 4574664 (1986-03-01), Curry
patent: 4619159 (1986-10-01), Kurek
General Services and Products Catalog, Weatherford 1988-1989, pp. 25-28.
Composite Catalog 1982-1983, Joy Manufacturing Co., pp. 74-75.
Composite Catalog 1982-1983, Eckel Tongs Back-up Units, p. 2953.
Reactive Torque System For A Rotary Drive Apparatus And A Gripping Device, UK Patent Application 38987/78, 2 Oct. 78.
Apparatus shown in Fig. 1 of this Pending Application and Described in the Text.
Composite Catalog 1982-1983 Varco Oil Tools, pp. 5-9.

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