Abstract: Multiple gas lift valves interposed in a well tubing string are each configured to have gas flow ports adapted to emit a predetermined acoustic signal for transmission through the well to a microphone or similar acoustic signal receiver whereby a determination may be made of which gas lift valves are open or operating properly. One or more of the gas lift valves may also include fluid pressure, temperature and viscosity sensors as well as a valve opening sensor and/or valve pressure setting control and an associated signal controller/generator arrangement for generating signals for transmission to the surface. The signal generators may be of the acoustic or so-called stress wave type.

Abstract: A method for setting a whipstock in a wellbore on a packer-anchor which employs a wireline that carries a setting assembly which severs a shear member carried by the setting assembly after the whipstock is set onto the packer-anchor.

Abstract: A method and apparatus for setting a whipstock onto a packer in a wellbore wherein the whipstock is laterally and rotatably movable after it is fixed to the packer, whereby the whipstock can move laterally while rotating so that opposite ends of the whipstock can be made to contact opposing inner walls of the wellbore.

Abstract: A method and apparatus for setting a whipstock in a subsurface well conduit using a combination of an accelerator tool, jar tool, and setting tool, and a whipstock being shearingly carried by the setting tool, and using the jar tool to shear and separate the whipstock from the setting tool.

Abstract: A method for forming a window in a subsurface well conduit using a coiled tubing unit together with standard rotary rig tools adopted for use with a coiled tubing unit, and a whipstock with no wear projection on the guide surface thereof, and controlling the angular relationship between the tools and the whipstock while forming the window.

Abstract: A well conduit cutting and milling apparatus conveyable into and out of a well on coilable tubing using a tubing injection unit. The apparatus includes tubing or casing cutting arms which are radially extendable and retractable with respect to a cylindrical support body by pressure fluid operated pistons. The apparatus is made up of multiple end-to-end connected units including one which supports interchangeable cutting and milling arms and units which have radially extensible and retractable stabilizing arms which engage the inner wall of the tubing or casing to centralize and stabilize the apparatus during operation. The cutter and milling arms are modified for milling away a section of tubing by moving the apparatus in an upward or out of the well direction. The cutting elements are preferably cylindrical hard metal members which are supported on the arms for cutting away an end face of the tubing in a tangential direction of movement.