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A personal fall protection system for securing a worker to an elevated and exposed structure defining a work area is disclosed. The fall protection system includes a safety belt supported on the worker's body with a body harness. The safety belt includes two belt couplings movable in a channel aroun

A personal fall protection system for securing a worker to an elevated and exposed structure defining a work area is disclosed. The fall protection system includes a safety belt supported on the worker's body with a body harness. The safety belt includes two belt couplings movable in a channel around the belt, each adapted to be attached to a lanyard. Two spaced apart rails are mounted adjacent opposite side limits of the structure. A movable anchor for securing the end of a lanyard is mounted to each rail. A lanyard ties off the worker at each belt coupling to an anchor. The fall protection system thereby secures the worker to both sides of the structure while allowing the worker to rotate relative to the lanyards within the work area and move freely forward and backwards throughout the work area between the rails.

대표청구항 ▼

A personal fall protection system for securing a worker to an elevated and exposed structure defining a work area is disclosed. The fall protection system includes a safety belt supported on the worker's body with a body harness. The safety belt includes two belt couplings movable in a channel aroun

A personal fall protection system for securing a worker to an elevated and exposed structure defining a work area is disclosed. The fall protection system includes a safety belt supported on the worker's body with a body harness. The safety belt includes two belt couplings movable in a channel around the belt, each adapted to be attached to a lanyard. Two spaced apart rails are mounted adjacent opposite side limits of the structure. A movable anchor for securing the end of a lanyard is mounted to each rail. A lanyard ties off the worker at each belt coupling to an anchor. The fall protection system thereby secures the worker to both sides of the structure while allowing the worker to rotate relative to the lanyards within the work area and move freely forward and backwards throughout the work area between the rails. rface formation, comprising: (a) a derrick; (b) a drill string including tubing, said drill string being conveyed from said derrick into the wellbore; (c) a drilling assembly associated with said drill string; (d) a drill bit at an end of said drilling assembly; (e) a force application device capable of continuously applying force on the drill bit to move the drill bit in the wellbore to drill said wellbore; (f) a slidable assembly uphole of the force application device having a slidable drill collar, said drill collar having a locking device, wherein the locking device engages the drill collar with the wellbore inside to maintain the drill collar stationary relative to the wellbore while the force application device travels a predetermined distance from an initial position in the wellbore and thereafter disengages from the wellbore inside and allows the drill collar to move toward the force application device by the predetermined distance; and (g) a st