Abstract: A screened vacuum enclosure for use in separating drilling fluid from drill cuttings in a vacuum-based shaker system, the screened vacuum enclosure including: a) a rectangular frame including downstream and upstream longitudinal outer frame members and transverse outer frame members, with one or more vacuum ports extending through or into one of the longitudinal outer frame members, the vacuum ports communicating vacuum suction to the interior of the screened vacuum enclosure; b) one or more inner frame support members connected to the outer frame members; c) a screen attached to the top surface of the frame; and d) a floor attached to at least part of the bottom surface of the frame.

Abstract: A screened vacuum enclosure for use in separating drilling fluid from drill cuttings in a vacuum-based shaker system, the screened vacuum enclosure including: a) a rectangular frame including downstream and upstream longitudinal outer frame members and transverse outer frame members, with one or more vacuum ports extending through or into one of the longitudinal outer frame members, the vacuum ports communicating vacuum suction to the interior of the screened vacuum enclosure; b) one or more inner frame support members connected to the outer frame members; c) a screen attached to the top surface of the frame; and d) a floor attached to at least part of the bottom surface of the frame.

Abstract: A screened vacuum enclosure for use in separating drilling fluid from drill cuttings in a vacuum-based shaker system, the screened vacuum enclosure including: a) a rectangular frame including downstream and upstream longitudinal outer frame members and transverse outer frame members, with one or more vacuum ports extending through or into one of the longitudinal outer frame members, the vacuum ports communicating vacuum suction to the interior of the screened vacuum enclosure; b) one or more inner frame support members connected to the outer frame members; c) a screen attached to the top surface of the frame; and d) a floor attached to at least part of the bottom surface of the frame.

Abstract: A system for recovering used drilling fluid from drill cuttings being processed on a shaker screen. The system includes: a vacuum screen attachment operatively connected to the underside of the shaker screen, the vacuum screen attachment operatively connected to a vacuum source by a vacuum conduit; a hydrostatic chamber located in the vacuum conduit downstream of the vacuum screen attachment, the hydrostatic chamber having a fluid dump port at or adjacent to its bottom surface; a means for setting a limit of fluid accumulation in the hydrostatic chamber, wherein fluid dumps from the fluid dump port when the limit of fluid accumulation is reached; and a conduit for conveying the fluid dumped from the fluid dump port to a storage tank.

Abstract: A method of automatic drilling of a well with coil tubing or drill pipe tubing utilizes AC motors coupled to variable frequency drives controlled by a programmable logic controller. For example, a coil tube injector is supported in a mast for injecting coil tube from a reel and into a wellbore for drilling the wellbore. The AC motors for the injector are driven for controlling a rate of injection of coil tube by the injector for maintaining at least one drilling parameter such as weight-on-bit, differential mud pressure or rate of penetration. The AC motor for the reel is also controlled for driving the reel and maintaining a relative rate of coil tube supplied from the reel to the injector. Drawworks and a top drive supported by the draworks can also be equipped with AC motors and variable frequency drives for controlling a drilling rate for maintaining at least one of the drilling parameters.

Abstract: A method of automatic drilling of a well with coil tubing or drill pipe tubing utilizes AC motors coupled to variable frequency drives controlled by a programmable logic controller. For example, a coil tube injector is supported in a mast for injecting coil tube from a reel and into a wellbore for drilling the wellbore. The AC motors for the injector are driven for controlling a rate of injection of coil tube by the injector for maintaining at least one drilling parameter such as weight-on-bit, differential mud pressure or rate of penetration. The AC motor for the reel is also controlled for driving the reel and maintaining a relative rate of coil tube supplied from the reel to the injector. Drawworks and a top drive supported by the draworks can also be equipped with AC motors and variable frequency drives for controlling a drilling rate for maintaining at least one of the drilling parameters.