Patent ID: 6581455
Filing Date: 2003-06-24
Classification: E21B

Abstract:
An apparatus for testing an underground formation comprising:a) a work string disposed in a well borehole; b) at least one independently adjustable and extendable element mounted on the work string the extendable element being capable of sealing engagement with a wall of the borehole for isolating a portion of the well at the formation; c) at least one independently extendable gripper element_disposed on the work string axially spaced apart from a port, the port being selectively exposed to the isolated portion of the borehole wall, wherein the at least one extendable gripper element forcibly engages the borehole wall to anchor the work string radially, axially and circumferentially while the borehole wall is engaged by the at least one extendable gripper element; and (d) a test device for testing at least one characteristic of the formation.