if desired to promote removal of the patch from the well if desired in some embodiments of the patch several slips will hold in each direction when actuated in the illustrated embodiment a biasing member 24 which may be a spring gas charged member or another member which itself is driven to extend urges slips 20 to climb ramp 16 thereby causing slip s 20 to move in a direction to bite into a stub 26 with which the patch 10 is to engage slips 20 therefore are automatically engaged with the stub 26 when the patch 10 comes in engaging contact therewith another feature of housing 12 is a pressure channel 28 that is formed within the housing 12 as illustrated or may be attached thereto as a separate structure if desired the channel 28 has the function of providing a pressure passageway to a volume changeable chamber 70 seen only in fig2 through port 30 which is connected by channel 28 to inlet port 32 the housing further includes as illustrated a pressure relief port 36 and a toothed section 38 complementary to a body lock ring 40 mounted at an end housing 42 of a seal 44 the body lock ring functions to maintain a compression load on the seal 44 that is created by application of pressure to port 30 simultaneously as the compression load is applied to the seal the fluid supplied through port 30 to chamber 70 exerts a driving force on a drive piston 46 to actuate slips 22 thus it will be.