and slips 37 to be inserted over the collar 21 the inner sleeve 49 and fingers 50 will move up and down relative to the outer sleeve 47 inner sleeve 49 has an annular band or piston 51 on its exterior piston 51 has a seal that seals to the interior of outer sleeve 47 a shoulder 53 faces upward on the interior of outer sleeve 47 a space between piston 51 and shoulder 53 defines a chamber 55 a passage 57 connects chamber 55 to a source of hydraulic liquid under pressure applying hydraulic pressure to chamber 55 will cause the inner sleeve 49 to move upward relative to the outer sleeve 47 in operation if the casing string 17 becomes stuck the operator will cement the casing in place before the cement sets completely the operator will assemble running tool 45 with the slip bowl 23 as shown in fig1 the inner sleeve 49 will be pushed downward relative to the outer sleeve 47 the inner sleeve fingers 50 will extend downward into the clearances 42 to retain the slips 37 in a retracted position the inner sleeve fingers 50 will radially expand the slip bowl 23 to a diameter greater than the outer diameter of collar 21 the lower portion of the inner.