Abstract: The invention relates to a safety gate including a frame with a horizontal base member and usually two vertical upright post members affixed to each end of the base member at its lower end; a door mounted for hinged opening movement, hingedly attached to the vertical upright post member; the frame being held in position by frictional engagement against supporting walls of an opening, provided and adjusted by attachment means which are mounted on adjusting rods; the door includes an upper bar and a lower bar connected together with a number of pales spaced apart to form an effective barrier; the door also including a closing mechanism for releasibly retaining the door in the closed position.

Abstract: A blocking mechanism for preventing the opening of a tail gate on a vehicle having a hitch member, the blocking mechanism comprising a triangularly shaped frame having two horizontal members and two diagonal members, wherein each of the two diagonal members include an upper and lower end and each of the two horizontal members include a proximal and distal end; the lower ends of the two diagonal members are rotationally connected to a connecting bracket and the upper ends are attached to angled brackets, wherein the connecting member is attached to hitch member; the distal ends of the two horizontal members are attached to the angled brackets and the proximal ends are joined via a pair of connection elements; and a padlock is configured to lock the pair of connection elements.

Abstract: A vehicle door handle assembly includes an actuating element, which is actuated by a user gripping the handle from behind. The actuating element protrudes outward through a recess in the handle from an inner cavity through a wall of the handle over an outer contour of the handle. The actuating element is movable through the recess in the direction of the handle inner cavity against an elastic restoring force. The actuating element is at least in sections made of a metal. Located inside the handle is a stationary electric module with an inductive distance sensor so that when the actuating element moves, the distance of the actuating element in relation to the inductive distance sensor changes. An evaluation unit detects the signals of the inductive distance sensor, detects an actuation as a function of the signals, and provides an output signal.

Abstract: A vehicle door opening mechanism includes a biasing structure operatively coupled to a vehicle door, the biasing structure movable between a first position and a second position, a portion of the biasing structure engageable with a vehicle body surface to bias the vehicle door from a closed position to a partially open position. Also included is a retaining structure disposed proximate the portion of the biasing structure that is engageable with the vehicle body surface, the retraining structure retaining the vehicle door in the partially open position to prevent the vehicle door from moving toward a fully open position.

Abstract: A door-lock device having a casing, a slider, arranged within said casing, a locking hook with a body and a locking portion, said body having a cam shape which abuts said slider, said locking hook capable to assume a rest position, in which said locking portion is disengaged from said recess, and an operative position, in which said locking portion is inserted, and engaged with, said recess, and pushing capabilities, for keeping said slider in contact with said cam surface, so when said door is closed, said locking hook passes from said rest position to said operative position, said cam shape compressing said pushing capabilities, so that said pushing capabilities accumulate energy and said slider exerts a resistance to the closing of said door, and, then, allowing said pushing capabilities to release said energy, so that said slider exerts a return action on said locking hook and on said door.

Abstract: A door locking device includes: a pivot end wall portion extending from a pivot end side of a door 131, and having a first through-hole formed therein; an opposed wall portion 20 being opposed to the pivot end wall portion when the door 131 is closed, and having a second through-hole 23A, 23B formed therein; a key cylinder including a movable element 33 configured to be displaced in accordance with unlocking/locking operation; and a pivot hook 40A, 40B configured to interlock with the movable element 33. When the door is unlocked, the pivot hook 40A, 40B retreats to an inner side of the door 131 with respect to the first through-hole, whereas when the door is locked, the pivot hook enters the second through-hole 23A, 23B via the first through-hole to keep the door 131 and a door 132 closed.

Abstract: An operator cab for a machine such as a motor grader includes an access door coupled to a frame by way of a hinge mechanism. The hinge mechanism has abutting cam and follower surfaces with geometry to control the swinging of the access door such as under the force of gravity. The cam surface has a double-sloped profile of rotation about the pivot axis of the hinge mechanism so that the access door swing is controlled in either of a first or a second swing direction toward a dwell location of the access door.

Abstract: An electronic device with an enclosure having a base and a base is disclosed. The electronic device can include a shaft coupled with the base and the base. The shaft can be coupled with a torque component engagement feature that provides a frictional engagement with the shaft. The torque component engagement feature can magnetically couple with a magnet, or magnets. The electronic device can also include a magnetic assembly configured to magnetically couple with the shaft engagement. The magnetic assembly can provide a first magnetic field that magnetically couples the torque component engagement feature with the magnetic assembly. However, the magnetic assembly can change to a second, reduced magnetic field less than the first magnetic field. When the display assembly is rotated toward the base, the magnetic assembly changes to the second magnetic field, and the torque component engagement feature magnetically decouples from the magnetic assembly based on the reduced magnetic field.

Abstract: A system and method for inhibiting inadvertent movement of a window sash out of a fully open position. Brake shoes travel in the guide tracks as the window sash is moved between a fully open position and a fully closed position. A stop is mounted within the guide tracks. The brake shoe and the stop contact and interconnect when the window sash is moved to its fully open position. The brake shoe is separable from the stop when a closing force is manually applied to the window sash that acts to move the window sash away from its fully open position. The force applied must exceed a threshold level. In this manner, the window sash will remain in its fully open position and will not inadvertently drift closed due to gravity, vibrations or contact with another window sash.

Abstract: A window balance assembly may include a carrier, a spring element, and a mounting bracket. The spring element may include first and second portions. The first portion may be coupled to the carrier. The mounting bracket may engage the second portion of the spring element and may selectively engage the carrier. The mounting bracket may include a first mounting surface disposed at a non-perpendicular angle relative to an exterior surface of carrier when the window balance assembly is in an uninstalled configuration. The first mounting surface may be substantially parallel to the exterior surface of the carrier when the window balance assembly is in an installed configuration and the mounting bracket is disengaged from the carrier.

Abstract: A trolley for use with a folding door to suspend the door from an overhead track. The trolley has a mounting post for use in connecting the trolley to a folding door with a cylindrical mounting axle extending from the post. The trolley has a wheel unit comprising a short wheel axle with a wheel rotatably mounted at each end. The wheel unit is mounted on the post with the mounting axle on the post extending through the wheel axle between the wheels. The post is rotatable relative to the wheel unit.

Abstract: A door closer assembly configured for replacing a previous door closer assembly and installing using pre-existing mounting holes. The door closer assembly includes a closer having a closer housing and a pair of universal mounting brackets. The closer housing has an abutment surface along an axis of the closer. Each universal mounting brackets has mounting openings aligning with the pre-existing mounting holes. The closer is secured to the universal mounting brackets.

Abstract: A hinge for doors of appliances, including a box-shaped element and a first lever pivoted on the box-shaped element by a first pin; one of the box-shaped element or the first lever being fixable to a frame and the other fixable to a door, to make the door tiltably movable relative to the frame between a closed position and an open position; a first elastic device supported by the box-shaped element for applying an elastic action on the first lever, a rod for connecting the first lever to the first elastic device, the connecting rod being positioned in a slidable fashion inside the box-shaped element; a damping member for applying a damping action during the reciprocal motion of the first lever and the box-shaped element, in the proximity of reaching the closed position; a cartridge containing the hydraulic damping member, the cartridge being fixed to the box-shaped element.

Abstract: A method for controlling a door, comprising the steps of storing energy during a manual opening of a door, sensing an object within a doorway, selectively applying a force derived from the stored energy, to close the door, based on the sensing of an object in the doorway. The closure is preferably controlled by an electronic control. A door closing device comprising an energy storage device for storing energy during door opening and releasing the stored energy to subsequently close the door, a damping system for damping a closure of the door, a sensor for detecting an object within a doorway, having an output, a controllable device for selectively restraining the energy storage device from closing the door, and a control system for controlling the controllable device based on the output.

Abstract: A door holding apparatus fixed to an upper portion of a refrigerator uses magnetic force to hold a first door thereof and a second door thereof in an open state, wherein the refrigerator comprises a body, the first door provided with an opening, and the second door provided in the front of the first door to open and close the opening, the apparatus includes a first holder provided with a first magnet, a second holder provided with a second magnet, and a fixation unit fixed to an upper portion of the body and provided with a first fixation unit fixing the first door by magnetic force with the first magnet in a state where the first door is opened, and a second fixation unit fixing the second door by magnetic force with the second magnet in a state where the second door is opened.

Abstract: A rebound suppression system for a sliding door is provided with a sliding door, a rail provided on an outer frame of the sliding door, a roller secured to the sliding door and configured to rotate in accordance with opening and closing motions of the sliding door, a fitting portion having a width smaller than the width of the roller and provided on at least a part of the rail, a rebound preventing roller having a width smaller than that of the fitting portion, and a pressing mechanism configured to press the rebound preventing roller against the rail and the fitting portion by an elastic body.

Abstract: Provided is a security device and method for preventing burglary of a container. The method includes igniting, via ignition means, an explosive substance in the container, so that the explosive substance is combusted before it reaches a critical mass. The method further includes conveying atmosphere from inside the container to the ignition means.

Abstract: A door jamb configured to provide a flush in-swing door when viewed in the direction of door in-swing.

Abstract: A spacer element for a double glazed article, a kit for assembling the spacer element, and a double glazed article including the spacer element. The spacer element includes a frame section. The frame section has a first substantially planar mounting surface located on a first side of the frame section for mounting a first sheet of glass on the spacer element at a periphery of the first sheet of glass. The frame section also has a second substantially planar mounting surface located on a second side of the frame section opposite the first side, for mounting a second sheet of glass on the spacer element at a periphery of the second sheet of glass. The spacer element also has a cavity located in-between the first and second mounting surfaces for accommodating a lock and/or roller mechanism of the double glazed article at a periphery of the double glazed article.

Abstract: A window shade includes a top box, a bottom bar and a shade connected between the top box and the bottom bar. Multiple wire units extend through holes of the shade. Each wire unit includes two connection wires and multiple cross wires which are spaced and transversely connected between the connection wires. Each wire unit has an operation wire for controlling the shade, the operation wire alternatively extends between the cross wires along the longitudinal direction of the shade. The holes in the shade each include two passages formed at two inner ends thereof. The connection wires extend through the two passages. At least one tooth extends from each of two insides of each of the holes and located between the two passages. When the wire unit is pulled outward, the cross wires are restricted by the teeth so that the operation wire is restricted from being pull out.

Abstract: A covering for an architectural opening including a support tube and a panel operably connected to the support tube and configured to be wound around the support tube. The panel includes a support sheet and at least one vane or slat connected to the support sheet. The at least one vane includes a vane material operably connected to a first side of the support sheet and a support member operably connected to the vane material and configured to support the vane material at a distance away from the support sheet when the panel is in an extended position with respect to the support tube.

Abstract: Disclosed is a hammer reamer that comprises similar features to prior art reamers such as cutting wheels and a product-pulling feature. An exemplary hammer reamer, however, also includes a hammer component operable to deliver a percussive cycle of an internal piston component. Notably, an internal impact surface within the head of the hammer reamer is positioned relative to the piston component in the hammer consistent with a “sweet spot” position of a drill bit used in a pilot boring configuration. Unlike a slidably engaged drill bit, however, the internal impact surface in the hammer reamer is fixed in place so that the impact surface remains in the “sweet spot” of the piston stroke range. In this way, even though the hammer reamer is being pulled back through a bore while the drill string is being retracted, the hammer component may continue to deliver percussive blows to the hammer reamer head to introduce a vibratory force that contributes to the efficiency of the reaming process.

Abstract: A method for producing modular down hole, hydraulic motor components involving the formation of replaceable stator slugs to be collectively housed within a stator housing to form a stator assembly, including, in some embodiments, replaceable lobe components for the stator slugs for altering the interference with a selected rotor for such motor.

Abstract: A center-pillared full-face shaft drilling machine comprises a center pillar (1), device platforms (2), a derrick (3), a driving system (4), a personnel and material conveying system (5), a well wall support and protection system (6), a safeguard system (7), and an operation chamber (8). The derrick (3) is mounted at a wellhead. The operation chamber (8) is disposed on the derrick (3). The center pillar directly leads from the well bottom to the wellhead and is connected to a slide rack comprised in the derrick on the ground. The driving system (4) is mounted at the front end of the center pillar (1) of a device. The multiple device platforms (2) are sequentially mounted on the center pillar (1) of the device from rear to front. The personnel and material conveying system (5) and the safeguard system (7) are separately mounted on the device platforms at the rear of the driving system (4) and on the ground.

Abstract: A helical displacement well with preassembled segments includes a preassembled shaft-forming penetrator tube including helical plates mounted to its exterior that may be rotated to propel the casing into the ground. A hydraulic drill motor rotates the penetrator tube as it moves deeper into the ground. Extension tubes may be added to and coupled to the penetrator tube. A bolt including a threaded stem sized to engage the threaded bolt opening of the male connector and a cap of larger breadth than the threaded stem and sized to fit within the unthreaded tension bolt opening of the female connector for connecting the female connector about the male connector.

Abstract: An earth-boring tool includes a cutting element comprising a hard material and at least one of a signal generator configured to provide an electromagnetic or acoustic signal to an interface between a surface of the hard material and a surface of a subterranean formation, and a sensor configured to receive an electromagnetic or acoustic signal from the interface. A method of forming a wellbore includes rotating the earth-boring tool within a wellbore and cutting formation material with a cutting element, transmitting a signal through the cutting element to an interface between the cutting element and the formation material, and measuring a response received at a sensor. A cutting element includes a transmitter oriented and configured to dispense a signal to an interface between the cutting surface and a surface of a formation and a sensor oriented and configured to measure a signal from the interface.

Abstract: A system for connecting drill pipe to facilitate bi-rotational drilling and methods of bi-rotational drilling using the system are described. The system includes a rotatable sleeve disposed on the end of one pipe joint and a guide on the other pipe joint in which both sleeve and guide have mating threads to pull the joint together and pipe end structures to prevent rotation when the joints are pulled together.

Abstract: A completion method involves a telescoping joint in the completion string that needs to be locked when pumping fluid through it as part of the completion method. The joint is locked with two locks and one is thermally activated using a shape memory locking member to handle the stresses from component contraction. The setting of the thermally actuated lock occurs when the temperature is lowered during pumping. At other times the temperature of well fluid defeats the thermal lock leaving a non-thermal lock actuated until such time that the telescoping joint can be used in production. The non-thermal lock is defeated so allow normal telescoping action during production. The non-thermal lock is defeated with string manipulation or pressure or other ways depending on its design.

Abstract: A rock drill telescopic arm is provided having a fixed arm which is sleeved on a movable arm; a telescopic oil cylinder; a plurality of adjusting blocks in the fixed arm along a circumferential direction thereof; a plurality of adjusting screw rods for respectively adjusting the position of each of the adjusting blocks on the fixed arm; a wear-resistant sliding block between at least part of the adjusting blocks and the movable arm; and a retainer at an opening end of the fixed arm for preventing the wear-resistant sliding block from moving along a telescoping direction of the movable arm, wherein the movable arm can be driven by the telescopic oil cylinder to slide along the wear-resistant sliding block. A rock drill equipped with the rock drill telescopic arm provides for convenient adjustment of a gap between the fixed arm and the movable arm.

Abstract: A fracturing liquid delivery hose for recovery of shale oil and gas, and manufacturing method and co-extrusion mold thereof are provided. The method includes extrusion of a cover layer with a first adhesive layer and an inner lining layer with a second adhesive layer, formation of an enhancement layer, heating and pressurizing for bonding between the cover layer and the enhancement layer and between the inner lining layer and the enhancement layer, so that the formed fracturing liquid delivery hose has resistance at least to high pressure and chemical corrosion. The cover layer and the inner lining layer can use different types of materials.

Abstract: A wireline riser tensioner system includes a set of tensioning units arranged about a first well with at least one tensioning cable connected to a first and a second tension ring of the first and second wells, respectively. Both wells can be serviced using the same set of tensioning units. The at least one tensioning cable is routed through a plurality of sheaves. If not being serviced, the first or the second well might serve as an anchor.

Abstract: A powered clamp for transmitting torque to a drill pipe comprises an outer housing disposed around an axial central passage and connected to a plurality of carrier guides defining a plurality of radial slots. An inner housing defines a coaxial central passage, is rotatably connected to the outer housing, and defines a plurality of actuator slots having a spiral configuration relative to the centerline axis. A carrier is slidably disposed in each slot between the carrier guides and has a carrier pin extending into a respective one of the actuator slots. At least one powered linear actuator is connected between the outer and inner housing to selectively rotate the housings relative to one another. This rotation causes the carriers to move radially inward and outward as the carrier pins travel along the actuator slots, selectively gripping and releasing the drill pipe.

Abstract: A power tong assembly includes a power tong and an interlock system operably coupled to the power tong. The power tong is configured to grip and rotate a tubular segment in a first direction to make-up a threaded connection with the tubular segment and in a second direction to break-out the threaded connection with the tubular segment. The interlock system is configured to selectively allow the power tong to rotate the tubular segment in one of the first direction and the second direction unrestricted while restricting the power tong to rotate the tubular segment in the other of the first direction and the second direction at a limited speed.

Abstract: A tube forming mechanism for application in a tube is provided with a band and clamping mechanism. The clamping mechanism is arranged within the tube, outside of which the band. A system for guiding a bore head is provided, including the tube forming mechanism, a head, mechanism transferring the pressing force to the bore head, and also a curled tube fed from the drum into the wellbore to transfer the pressing force exerted by the pressing mechanism via a mechanism releasably connected to the curled tube. A method of drilling a wellbore is described, wherein a bore head with a drill bit is lowered down the wellbore and pressed against its bottom, simultaneously inserting a tube into to wellbore. For pressing the head with the drill bit, a curled strip tube drawn from a drum is used, wherein the pressing force is applied to the tube via a mechanism releasably connected thereto.

Abstract: Killing a well by diverting flow in a drilling fluid circulation system to maintain kill mud pressure in a discharge piping during the well kill operation. It is determined that a target pressure of the kill mud in the discharge piping is not satisfied by a pressure of the kill mud discharged by a pump into the discharge piping. In response, a pressure of the kill mud is adjusted by at least partially opening a pressure control device to release kill mud into a bypass piping.

Abstract: A computerized control is used in controlling a choke when drilling a wellbore with a drilling system. The computerized control obtains a measured value of a parameter in the drilling system and controls the parameter in the drilling system using the choke. The computerized control obtains indications of an error between a set point of the parameter and the measured value of the parameter in the drilling system, a flow coefficient character of the choke, and a current position of the choke. Based on these indications, the computerized control then determines a position adjustment for the choke and adjusting the parameter in the drilling system by applying the position adjustment to the choke.

Abstract: A setting tool for performing a wellbore operation includes a mandrel, a cylinder slidably engaged with the mandrel, and a variable volume first chamber formed between the mandrel and the cylinder and a containment member having a second chamber adjacent to the first chamber. The setting tool also includes a support fluid disposed in the first chamber, a slidable support axially and circumferentially distributed inside the first chamber, and a valve disposed between the first chamber and the second chamber. The valve is configured to flow the support fluid from the first chamber to the second chamber. The support fluid and the slidable support, support the cylinder against a downhole pressure. The setting tool is conveyed into the wellbore and connected to a consumer. The setting tool is actuated to set the consumer.

Abstract: A tamper-evident sealing device for use with a ground well (such as, for example, a water well, gas well, oil well, or the like) has been developed which takes the form of a UV-resistant, micro-perforated polymer plastic device that can be easily sealed over a well cap by applying heat. Should an unauthorized individual attempt to gain access to the well, he/she will necessarily have to break through the sealed, ventilated plastic layer, thus leaving behind indications of the tampering. In a preferred embodiment of the present invention, a conventional well cap as used in prior art well structures remains in place, with the plastic protective covering of the present invention sealed directly over the cap.

Abstract: What is provided is a method and apparatus wherein a swivel can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections and allowing the fluid to be displaced in two stages, such as while the drill string is being rotated and/or reciprocated. In one embodiment the sleeve or housing can be rotatably and sealably connected to a mandrel. The swivel can be incorporated into a drill or well string and enabling string sections both above and below the sleeve to be rotated in relation to the sleeve. In one embodiment the drill or well string does not move in a longitudinal direction relative to the swivel. In one embodiment, the drill or well string does move longitudinally relative to the sleeve or housing of the swivel.

Abstract: A manifold trailer is provided and includes a chassis, a low pressure piping system disposed along a length of the chassis, and a single high pressure output manifold disposed along the length of the chassis, the high pressure output manifold terminating at a splitter that distributes fluids from the high pressure manifold to a wellhead.

Abstract: A sealing element is flanked by wedge-shaped extrusion ring assemblies. The rings climb a ramp on an adjacent pedestal ring on the way out to the borehole wall. Depending on the dimension of the gap to be spanned the extrusion rings slide part way up the pedestal ring ramp or to the top of the pedestal ring. An anchor ring is initially forced up an opposite ramp of the pedestal ring. If the sealing gap is short the anchor ring touches the borehole wall to act as an anchor for the plug while remaining spaced apart from the extrusion ring assembly. For larger gaps the anchor ring moves out far enough to the borehole wall and in contact with the extrusion ring located on top of the pedestal so that reaction forces are directed to keep the anchor ring wedged in position for support of the extrusion ring assembly.

Abstract: An expandable anchor/seal is pushed up a ramp until making contact with the surrounding tubular as or after the anchor/seal contacts the same tubular. The setting sleeve is made from high yield steel that has a weakened leading end to reduce the force required to push the leading end and the anchor/seal and an outer surface treatment at a leading end that engages or penetrates the wall of the surrounding tubular. Preferably a plurality of fingers are formed with axially oriented slots starting from a leading end allowing fingers to flex as they ride up the ramp on the mandrel for setting the anchor/seal and locking that set with the setting sleeve exterior surface configuration that can abut or penetrate the surrounding tubular.

Abstract: A method of providing cement isolators in an annular space about a tubular string in open hole uses a straddle tool that sequentially engages profiles in the tubular string so that prepositioned communication valves to the surrounding annulus can be straddled to force cement out through the straddle tool and into the annular space. The cement is formulated to stay in position and set up. Each valved opening in the string comes with an associated locating profile and another profile for a locking dog to secure the straddle tool in position for forced delivery from the tool and into the valve assembly for delivery into the open hole annulus where a sealing ring of cement will set up for isolation. The operation sequentially put in place as many barriers as there are valve assemblies to straddle and in a single trip generally working in an uphole direction.

Abstract: A running tool for a subterranean tool releases hydraulically. When used with a whipstock and anchor, the running tool can be dovetailed to the whipstock ramp to allow transmission of torque and downward force on the whipstock when positioning. An upward force can be transmitted to the whipstock from collet that is supported by a ball seat. The anchor is set and a passage opened through the anchor before cementing. The running tool is then released and a passage is opened for cementing. Release of the running tool results from shifting the ball seat that supports the collet. Cement can then bypass the seated ball and back through the ports in the ball seat. Removal of the running tool is assured by applying an upward force without needing rotation or other string manipulation that can be difficult in a deviated borehole.

Abstract: A composite cone assembly for use with a frac or bridge plug system is discussed herein having shaped outer contours and the strength needed for high pressure applications but with reduced machining requirements by forming part of the cone assembly from a high strength fiber material and the contoured surface from molding, such as from injection molding or compression molding.

Abstract: A layer of permeable material is positioned on an area of lost circulation lithology in a wellbore. An example of the permeable material includes a planar member with perforations that is rolled into and retained in an annular configuration. The permeable material is lowered into the wellbore adjacent the area of lost circulation and allowed to unroll and expand radially outward against walls of the wellbore. The wellbore wall along the area of lost circulation lithology can be reamed out so the layer of permeable material is out of the way of a drill bit. Applying a bridging agent on the interface where the permeable material contacts the wellbore wall forms a flow barrier.

Abstract: An inflow control device (ICD) that may include a piston located in a flow passage, a barrier that prevents fluid flow through the ICD, and a shear device that prevents movement of the piston. A method of actuating one or more ICDs may include preventing actuation of the devices by maintaining a pressure in an interior of a well tool (or tubing string) below an actuation pressure of the devices, where each device may include a piston located within a flow passage, a barrier that prevents fluid flow through the ICD, and a shear device that initially prevents movement of the piston. The method may include increasing the pressure in the well tool (or tubing string) to be greater than or equal to the actuation pressure, thereby shearing the shear device and moving the piston.

Abstract: Embodiments disclosed herein describe fracturing methods and systems, wherein pressure differentials and fluid flow rates may be utilized to stimulate multiple zones, sleeves, or ports with the same tool.

Abstract: A single element hydraulic open hole packer is provided. A method is provided for multistage isolation and fluid treatment of a borehole, in which a first frac valve tool and a second frac valve tool are provided, a first packer is mounted downstream from the first frac valve tool, a second packer is mounted between the first frac valve tool and the second frac valve tool, a third packer is mounted upstream from the second frac valve tool, at least one of the first, second and third packers being a hydraulic set packer having a single packing element, the first frac valve tool being moveable between a closed and an open position, the second frac valve tool moveable between a closed and an open position; running the liner into a wellbore; hydraulically setting the single element packers; conveying means for moving the first frac valve tool to the open position; and forcing stimulation fluid out through the first frac sleeve tool.

Abstract: A method and apparatus generally concerning the treatment of hydrocarbon-bearing formations adjacent a wellbore. In one embodiment, fracturing jobs are performed through the use of subs disposed in a casing string having profiles that interact with profiles formed on retractable keys of a tool.