Abstract: Disclosed is an open-hole casing perforation tool having projecting fins around the circumference of a mandrel that have firing mechanisms and shape charges to allow flexible operation of geological formation fracturing at desired predetermined locations in an oil or gas well bore.

Abstract: A geothermal wellhead repair unit including a mechanically set packer to isolate the wellhead for removal and repair thereof. The packer is run into the well string using a running tool. The packer is set by placing tension on the mandrel to set the packing elements and the slip assembly. Once the packer is set, the running tool can be disengaged without fear of collapsing the packer and the wellhead removed for repair or replacement. Upon replacement of the wellhead, the running tool is used to unset and retrieve the packer.

Abstract: In the representative embodiment of the present invention described herein, several new and improved methods and apparatus are disclosed for simultaneously massaging the upper and lower back portions of a person lying face-up in a supine position on an upwardly-facing surface.

Abstract: In accordance with an illustrative embodiment of the present invention, a full bore drill stem testing system includes a tubular housing suspended in a well on a pipe string and having an open bore therethrough. An annular electrical contact sleeve is mounted on the wall of the housing surrounding the bore. A running tool that is lowered into the pipe string on electrical wireline includes inner and outer body members, with the outer body member carrying latch dogs that engage a shoulder in the housing to stop downward movement in a predetermined position. The inner body member carries a normally retracted annular elastomer element that has an electrical contact means on its outer periphery, and expander means responsive to upward movement of said inner body member relative to said outer body member is operable to expand the elastomer element to cause the contact means to engage the contact sleeve and enable drill stem test data to be transmitted to the surface via the electric wireline.