Abstract: Disclosed is an apparatus for controlling sliding movement between two telescoping members of a jar or like apparatus for use in an oil well. The telescopic sliding movement between the two members is controlled by a hydraulic impedance device which is bypassed by a hydraulic fluid dump valve after a predetermined amount of telescopic movement between the two members. A dump valve opening means is releasably attached to the walls of one of the members and, after opening the dump valve mechanism, releases from the member wall to move with the telescoping member holding the dump valve mechanism in the open condition. Means is also disclosed for recocking the apparatus and for returning the opening means to its initial position such that the opening means is reattached to the wall of said one member.

Abstract: A hydraulically powered triplex pump having at least three pumping units, each operable in a cycle including suction, precompression and discharge phases, with the cycles being out of phase with one another, whereby simultaneous performance of these functions results in a substantially constant pressure and flow of both the pumped fluid and the power fluid. Separate power and cycle control circuits, which may employ different fluids, are provided. Control valve assemblies, each including two sleeve valves communicating with a common chamber, are operated by the control circuit fluid to condition power circuit flow for various phases of the pumping cycle. Precompression valves, a fill valve and a dump valve are operated by the control circuit to provide additional conditioning of power circuit flow to provide the precompression phase and to correct for variations in pumping unit stroke length.

Abstract: A universal fabricated backstop/buffstop comprising a pair of parallel, juxtaposed side plates, each side plate having a channel therein, a forward transverse member having the ends thereof secured to the pair of side plates and having a slot located in the center of the forward transverse member, and a rear transverse member having the ends thereof secured to the pair of side plates.

Abstract: A land vehicle for use as a blender for the mixing of dry, particulate, and liquid materials comprising a chassis having an articulated frame thereon, the articulated frame including a first translatable portion and a second translatable, rotatable portion rotatably secured to the first translatable portion whereby movement of the articulated frame with respect to the chassis between a first retracted position and a second extended position causes translational movement of the first translatable portion of the articulate frame and translational and rotational movement of the second translatable, rotatable portion of the articulated frame.

Abstract: A machinery skid unit comprising a machinery skid frame including a plurality of longitudinal frame members, cross-members mounted thereon and extending outwardly therefrom and a plurality of members secured to said longitudinal frame members in a horizontal plane below the cross-members. The machinery skid unit further comprises a plurality of engines, a plurality of positive displacement type pumps, a recirculating mixing system, a supply pump, and a recirculating pump.

Abstract: Packer for use in the disposal of abrasive fluids and well debris from a well drilling operation comprising: a packer mandrel; an upper slip support slidable on the packer mandrel; an upper slip wedge installed on the packer mandrel; a first plurality of slips; an elastomeric packer assembly installed on the packer mandrel; a lower slip wedge installed on the packer mandrel; a lower slip support; a second plurality of slips; a valve cage having a valve stem guide retained within the bore of the lower slip support; and a valve means having a stem slidable within the valve stem guide of the valve cage, the valve means being operable between a first position preventing and a second position allowing the flow of abrasive fluid and well debris through the bore of the lower slip support.

Abstract: Methods of acidizing a subterranean well formation, acidizing compositions and sequestering additives for preventing the precipitation of metal compounds in the formation.

Abstract: Oil well cementing compositions and processes are produced using a high efficiency sulfoalkylated lignin retarder composition and modifications thereof to produce cement compositions without gelation problems, having high early strength and with precisely controllable setting time.

Abstract: An explosive cutting device comprising an upper and lower member, each having a charge retaining area and a standoff area, a linear shaped explosive charge contained within each charge retaining area of the upper and lower member, a pair of anti-jet distortion members located on both the upper and lower member thereby defining an opening between the upper and lower member into which a target member to be severed is placed, a fastening means for securing the upper member to the lower member, and means for detonating the linear shaped explosive charge within the upper and lower member.

Abstract: A fabricated backstop/buffstop comprising a pair of parallel, juxtaposed side plates, each side plate having a central opening therein, a forward transverse member having each end thereof freely positioned in a portion of the central opening of each side plate of the pair of side plates and having a slot located in the center of the forward transverse member, and a rear transverse member having each end thereof freely positioned in a portion of the central opening of each side plate of the pair of side plates.

Abstract: Disclosed is a tester valve having a ball valve rotatable between the open and closed positions for use with a test string to test an oil well. The apparatus includes a ball closing piston in the valve operating mechanism which assists in rotating the ball to the closed position. One side of the ball closing piston is exposed to a first pressure of formation fluid flowing through the interior of the test string on the upstream side of the ball valve. The other side of the piston is exposed to a second pressure which is lower than the first pressure by a pressure drop caused as the fluid flows through the apparatus past the ball being rotated to the closed position. A bypass mechanism is additionally disclosed which is operable for equalizing the pressure on both sides of the ball closing piston when the ball is being rotated to the open position.

Abstract: The present invention relates to a composition for treating low temperature subterranean formations using novel gelled aqueous compositions wherein the treating composition is introduced into the formation and maintained therein until the composition reverts to a thin fluid. The composition comprises an aqueous liquid, a water soluble organic gelling agent, a free radical generating agent, and a reducing agent.

Abstract: A high stability, nondamaging spacer fluid is provided containing readily available weighting agents such as calcium carbonate and iron carbonate dispersed in water using a polymer viscosifier, a salt inhibitor, a primary sulfonated dispersant and a secondary fatty acid amide dispersion. Conventional high density weighting agents can also be used. The spacer fluid is stable over a temperature range of about 32.degree.-300.degree. F for extended periods with densities ranging from 11 to 17.6 pounds per gallon.

Abstract: A method and apparatus for inflating a plurality of packers installed in off-shore platforms and grouting the annuli between the piles and pile sleeves thereon utilizing a single line and a control valve system for inflating the plurality of packers and grouting the annuli between the pile and pile sleeves.

Abstract: Apparatus and a method for cutting round perforations and elongated slots in well flow conductors used in solution mining. The apparatus comprises a jet nozzle head for discharging a fluid to cut the perforations and slots, a string of continuous tubing for handling the jet nozzle head in a well bore, a tubing injector or tubing guide, a tubing storage reel having a flow conducting central hub connected with the tubing on the reel for forcing the abrasive fluid into the tubing at the reel, fluid pump and storage means connected with the reel hub, means for mounting the tubing injector above a well, and a wellhead having annular stripper rubber for sealing around the tubing and a side outlet for fluid returns.

Abstract: A method is disclosed for the cementing of casing in a well. The method involves lowering the casing into the wellbore, installing a device on a conduit and thereafter lowering the installed device and conduit to a predetermined position within the casing. The device is then actuated and fluid pressure is applied to the device to interlock the device with either the casing or an adapter previously inserted in the casing. Continued fluid pressure distends a seal member to isolate two regions of the casing. A cementing operation is then performed followed by closure of the device. Preferably, the conduit may then be retrieved for reuse.A device is disclosed for cementing a casing within a wellbore. The device includes a body for occupying a substantial portion of the interior of a region of the casing. The body is connectable to a conduit thereabove and has an external hydraulic seal to pack off the casing.

Abstract: A method of terminating the flow of formation fluids from an uncontrolled well comprising introducing a low viscosity fluid into the formation having the property of subsequently becoming highly viscous whereby the portion of the formation adjacent the uncontrolled well is surrounded by highly viscous fluid which blocks the flow of formation fluids to the uncontrolled well.

Abstract: A flow meter for measuring mass flow is disclosed having two vibrating U-shaped tubes, a means for vibrating the tubes, and sensors for detecting the coriolis force couple which results from the vibration and the flow of the material to be measured through the meter. The U-shaped tubes include spaced apart inlet and outlet sections connected to a fixed member at one end, and having the sensors at the other end thereof. The fixed ends are more closely spaced together than are the other ends having the sensors for increasing the moment arms acted on by the coriolis force couple for more easily detecting twist of said U-shaped tubes. The U-shaped tubes also are arranged to have the same natural of frequency for longitudinal oscillations and for torsional oscillations.

Abstract: A method of clarifying and removing water from water-solids suspensions wherein the solids are formed into flocculent masses and clarified water is continuously removed by the withdrawal thereof through a screen.

Abstract: A fluid flow measuring device comprising a hollow cylindrical housing having a plurality of recessed areas extending about a portion of the interior surface of the housing and through only a portion of the thickness of the housing; fluid flow straightening means having a plurality of recessed areas in the exterior surface of the fluid flow straightening means; a plurality of fastening means, each fastening means having a portion inserted in the area formed when a recessed area in the housing and a recessed area in the fluid flow straightening means are aligned while the remaining portion of the fastening means substantially conforms to the exterior surface of the fluid flow straightening means thereby fastening the fluid flow straightening means to the housing; and means for measuring the flow of fluid through the housing. Alternately, the housing may have a continuous recess about the interior surface in place of the plurality of recessed areas.