Slip device for wellbore tubulars

A well safety system, comprising:

• a safety slip device forming a part of a bore and comprising a housing disposing an upper set of slips spaced axially above a lower set of slips, and a rack and pinion actuator connected to the upper set of slips and the lower set of slips to radially move the upper and the lower sets of slips in unison between an open position permitting a tubular to move through the bore and a closed position to grip the tubular and resist downward tubular movement and permit upward tubular movement;
• and
• a bi-directional slip device forming a part of the bore and comprising a housing disposing an upper set of slips spaced axially above a lower set of slips, and a rack and pinion actuator connected to the upper set of slips and the lower set of slips to radially move the upper and the lower sets of slips in unison between an open position permitting a tubular to move through the bore and a closed position to grip the tubular and resist upward tubular movement and to resist downward tubular movement, wherein the upper and the lower slip sets are simultaneously in the retracted or extended position.

A method of safing well, comprising:

• actuating a bi-directional slip device to grip a tubular extending through a bore of a well system, wherein the bi-directional slip device comprises a first set of slips axially spaced vertically apart from a second set of slips, the first set of slips resisting downward movement of the gripped tubular and permitting upward movement of the gripped tubular and the second set of slips resisting upward movement of the gripped tubular and permitting downward movement of the gripped tubular, wherein the actuating comprises radially moving in unison the first and the second sets of slips from an open position removed from the bore to an extend position gripping the tubular;
• and
• actuating a safety slip device to grip the tubular, wherein the safety slip device comprises an upper set of slips axially spaced above a lower set of slips, wherein the upper set of slips and the upper set of slips resist downward movement of the gripped tubular and permit upward movement of the gripped tubular, wherein the actuating comprises radially moving in unison the upper and the lower sets of slips from an open position removed from the bore to an extend position gripping the tubular.