Ram-shear and slip device for well pipe

Details Ram-shear and slip device for well pipe Ram-shear and slip device for well pipe

1976-03-29

1977-08-23

Purser, Ernest R.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

285145, E21B 2900

Patent

active

040433897

ABSTRACT:
Blowout prevention equipment for use in a well operation is described. The equipment includes a combination of a ram-shear designed to sever a pipe string extending through the blowout prevention equipment down into a wellbore and a slip device positioned below the ram-shear to hold the severed lower portion of the pipe string and to prevent it from falling down into the wellbore. The slip device and the ram-shear may be operated simultaneously by a hydraulic control system so that the slip device is in position to hold the severed pipe string as the pipe string is sheared. The slip device includes a split slip bowl movable into proximity of the pipe string and plurality of gripping segments carried by each section of the slip bowl.

REFERENCES:
patent: 1802564 (1931-04-01), Lacey
patent: 1802565 (1931-04-01), Lacey
patent: 3454289 (1969-07-01), Fowler
patent: 3561526 (1971-02-01), Williams, Jr. et al.
patent: 3692107 (1972-09-01), Slator et al.
patent: 3736982 (1973-06-01), Vujasinovic

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