Drill string bridge coupler and actuator

Details Drill string bridge coupler and actuator Drill string bridge coupler and actuator

1992-06-17

1994-01-04

Neuder, William P.

Boring or penetrating the earth

With orienting or racking means for unconnected tools or...

285140, 285333, 2853342, 294266, B23P 1900, E21B 1916

Patent

active

052752461

ABSTRACT:
A bridge coupling for connecting between a drill pipe and an upper tubular member, such as a kelly cock safety valve in a drill rig and an actuator mechanism for the coupling. The bridge coupling permits rapid and accurate coupling at lower torque levels than with prior couplings. The coupling basically includes a stem having a lower male threaded end adapted to connect with female threads on the upper end of a drill pipe and a threaded upper end adapted to connect with an upper member on a drill rig. A shoulder sleeve surrounds and is secured to the stem intermediate the ends thereof. A spacer sleeve surrounds the stem at the lower stem end, spaced from the shoulder sleeve. A shoulder on a spacer sleeve engages the upper edge of the drill pipe when the drill pipe is threaded onto the stem to low torque, typically by a kelly spinner. An actuator sleeve surrounding the stem and shoulder sleeve is movable to drive a wedge ring between the stem and shoulder ring, tensioning the stem and loading the shoulder engaging the pipe end to provide the required forces locking the pipe in place. A bridge coupler actuator includes an upper fork adapted to engage the stem and a lower fork adapted to engage the actuator sleeve. A hydraulic cylinder system forces the lower fork away from the upper fork to make the connection and toward the upper fork to break the connection. A locking spring ring is provided to lock the connection in the engaged position and prevent accidental opening of the connection under vibration and automatically open when the connection is broken.

REFERENCES:
patent: 4830121 (1989-05-01), Krasnov et al.
patent: 5125148 (1992-06-01), Krasnov

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