Abstract: An apparatus for selectably injecting materials into a well comprises an elongate inner casing having first and second sets of selectably closable passages therethrough and an outer casing extending between the first and second ends surrounding the inner casing so as to form an annular cavity therebetween. The first end of the outer casing is sealably connected to the inner casing and the second end of the outer casing has a free edge proximate to the second set of passages. The first set of passages extends through the inner casing into the annular cavity such that fluid passing through either of the first or second sets of passages enters an exterior of the apparatus at a common location.

Abstract: An apparatus for selectably injecting materials into a well comprises an elongate inner casing having first and second sets of selectably closable passages therethrough and an outer casing extending between the first and second ends surrounding the inner casing so as to form an annular cavity therebetween. The first end of the outer casing is sealably connected to the inner casing and the second end of the outer casing has a free edge proximate to the second set of passages. The first set of passages extends through the inner casing into the annular cavity such that fluid passing through either of the first or second sets of passages enters an exterior of the apparatus at a common location.

Abstract: An apparatus for use in forming a plug during hydraulic fracturing of a subterranean soil formation includes a top tubular retaining body extending between top and bottom ends and having a frustoconical outer surface extending from the bottom end thereof; and a plurality of slip arms located around the outer surface of the retaining body, each slip arm extending between top and bottom ends and having an inner surface extending from the slip arm top end corresponding to the outer surface of the retaining body and an exterior surface adapted to engage a wellbore. The plurality of slip arms extend from a ring surrounding the retaining body.

Abstract: An apparatus for use in forming a plug during hydraulic fracturing of a subterranean soil formation includes a top tubular retaining body extending between top and bottom ends and having a frustoconical outer surface extending from the bottom end thereof; and a plurality of slip arms located around the outer surface of the retaining body, each slip arm extending between top and bottom ends and having an inner surface extending from the slip arm top end corresponding to the outer surface of the retaining body and an exterior surface adapted to engage a wellbore. The plurality of slip arms extend from a ring surrounding the retaining body.

Abstract: An apparatus for use in forming a plug during hydraulic fracturing of a subterranean soil formation comprising a top tubular retaining body extending between top and bottom ends and having a frustoconical outer surface extending from the bottom end thereof. The apparatus further includes a plurality of slip arms located around the outer surface of the retaining body, each slip arm extending between top and bottom ends and having an inner surface extending from the top end corresponding to the outer surface of the retaining body and an exterior surface adapted to frictionally engage a wellbore; and a seal element located around the outer surface of the retaining body above the plurality of slip arms adapted to be displaced towards the top end of the retaining body by the plurality of slip arms so as to seal an annulus between the retaining body and the wellbore.

Abstract: An apparatus and method for displacing a sleeve within a downhole tool wherein the apparatus comprises an outer mandrel, and a sleeve extending between first and second ends slidably located within the outer mandrel wherein the sleeve and mandrel form first, second and third annular chambers therebetween. The first annular chamber is in fluidic communication with an interior of the sleeve. The second annular chamber is in fluidic communication with an exterior of the mandrel. The third annular chamber is substantially sealed. The method comprises pressurizing the second chamber through bores extending through the sleeve and releasing the pressure within the second chamber so as to permit a vacuum within a third sealed chamber and a pressure from an exterior of the mandrel to pressurize a first chamber to draw the sleeve towards a second end of the outer mandrel thereby uncovering the valve openings.

Abstract: An apparatus for use in forming a plug during hydraulic fracturing of a subterranean soil formation comprising a top tubular retaining body extending between top and bottom ends and having a frustoconical outer surface extending from the bottom end thereof. The apparatus further includes a plurality of slip arms located around the outer surface of the retaining body, each slip arm extending between top and bottom ends and having an inner surface extending from the top end corresponding to the outer surface of the retaining body and an exterior surface adapted to frictionally engage a wellbore; and a seal element located around the outer surface of the retaining body above the plurality of slip arms adapted to be displaced towards the top end of the retaining body by the plurality of slip arms so as to seal an annulus between the retaining body and the wellbore.

Abstract: An apparatus for selectably isolating a subterranean formation from a production string comprises a radially expandable ring located between upper and lower sleeves and retained at a position to intrude into a central passage extending therethrough. The expandable ring is permitted to radially expand into a recess upon displacement of the lower sleeve to permit a body retained thereon to move therepast. The apparatus includes a pair of inner and outer indexing rings which cooperate to permit the inner and outer indexing rings to move towards a bottom end thereof only to a fixed endwall whereafter further movement of the inner and outer indexing rings and lower sleeve is prevented.

Abstract: The disclosure pertains to methods for completing a well comprising locating a production tubing having a plurality of sleeve valves, each having a sliding sleeve therein within a well bore and locating a tool operable to open said plurality of sleeve valves within said production tubing. The method further comprises repeating for at least one of said plurality of sleeve valves the steps of opening a one of said plurality of sleeve valves with said tool, performing a fracturing operation and closing said one of said plurality of sleeve valves.

Abstract: An apparatus and method for displacing a sleeve within a downhole tool wherein the apparatus comprises an outer mandrel, and a sleeve extending between first and second ends slidably located within the outer mandrel wherein the sleeve and mandrel form first, second and third annular chambers therebetween. The first annular chamber is in fluidic communication with an interior of the sleeve. The second annular chamber is in fluidic communication with an exterior of the mandrel. The third annular chamber is substantially sealed. The method comprises pressurizing the second chamber through bores extending through the sleeve and releasing the pressure within the second chamber so as to permit a vacuum within a third sealed chamber and a pressure from an exterior of the mandrel to pressurize a first chamber to draw the sleeve towards a second end of the outer mandrel thereby uncovering the valve openings.

Abstract: An apparatus for selectably isolating a subterranean formation from a production string comprises a radially expandable ring located between upper and lower sleeves and retained at a position to intrude into a central passage extending therethrough. The expandable ring is permitted to radially expand into a recess upon displacement of the lower sleeve to permit a body retained thereon to move therepast. The apparatus includes a pair of inner and outer indexing rings which cooperate to permit the inner and outer indexing rings to move towards a bottom end thereof only to a fixed endwall whereafter further movement of the inner and outer indexing rings and lower sleeve is prevented.

Abstract: An apparatus for suspending a liner within a bore comprising a central tubular member and first and second sets of radially expandable arms. Each set of arms are expandable by corresponding longitudinally movable cones spaced apart along the tubular member. The apparatus further includes a seal located between the first and second sets of radially expandable arms and a selectably longitudinally compressible sleeve located between the first and second sets of radially expandable arms.

Abstract: An sleeve valve for a well assembly includes at least one set of passages extending through a tubular body between the central passage and an exterior of the tubular body and a sleeve slidably located within the central passage of the valve body adapted to selectably sealably cover or uncover the at least one sets of passages. A shifting tool for actuating the sleeve valve is connectable to a tool string and includes a shifting bore with an actuating piston extending from a central bore through the shifting tool and first and second key bores extending radially inwards from the outer surface each having a piston keys located therein. Each of the first and second piston keys is operably connected to the actuating piston so as to be extended from the outer surface when the central bore is supplied with a pressurized fluid.

Abstract: An apparatus and method for sealing against a bore in a soil formation. The apparatus comprises an elongate central member having a resilient tubular seal member extending between first and second ends therearound, a longitudinally moveable plunger surrounding the central member having a first wedge engagable upon the first end of the seal member and a backing ring engaging upon the second end of the seal member. The plunger is axially movable along the central member to compress the seal member between plunger and the packing ring and to press the first end of the seal member in a radially outward direction. The method comprises a locating the apparatus at a desired location and axially moving the plunger towards a corresponding backing ring so as to compress the seal member between plunger and the packing ring and to press the seal member in a radially outward direction.

Abstract: A method and apparatus for centering and engaging a casing against a wellbore. The apparatus comprises a valve body locatable in-line with the casing the valve body having an outer casing extending between first and second ends and a central passage therethrough, and at least one radially movable body extending therethrough. Each radially movable body has an aperture therethrough so as to permit an exterior of the valve body and the central passage to be in fluidic communication with each other. The apparatus further comprises a cylinder and a piston therein operable connected to the radially movable body in selective fluidic communication with the central passage. The method comprises locating the valve body in line with a wellbore casing, pressurizing the casing with a pressurizing fluid and transmitting the pressurizing fluid the cylinder so as to displace a piston located therein and extend the radially movable body.

Abstract: An apparatus and method for sealing against a bore in a soil formation. The apparatus comprises an elongate central member having a resilient tubular seal member extending between first and second ends therearound, a longitudinally moveable plunger surrounding the central member having a first wedge engagable upon the first end of the seal member and a backing ring engaging upon the second end of the seal member. The plunger is axially movable along the central member to compress the seal member between plunger and the packing ring and to press the first end of the seal member in a radially outward direction. The method comprises a locating the apparatus at a desired location and axially moving the plunger towards a corresponding backing ring so as to compress the seal member between plunger and the packing ring and to press the seal member in a radially outward direction.

Abstract: An apparatus and method for selectably opening a valve body having a central passage and a plurality of apertures therethrough. The apparatus comprises a sleeve slidably located within the central passage of the valve body adapted to selectably cover or uncover the apertures. The apparatus further comprises a shifting tool slidably locatable within the sleeve having at least one sleeve engaging member selectably extendable therefrom in parallel to a central axis thereto engagable upon the sleeve wherein the shifting tool is moveable. The method comprises positioning the shifting tool within the sleeve in a first or second position, extending the sleeve engaging members from the shifting tool in parallel to a central axis of the shifting tool into engagement upon the sleeve, and axially moving the shifting tool and the sleeve to the other of the first or second positions.

Abstract: An apparatus for suspending a liner within a bore comprising a central tubular member and first and second sets of radially expandable arms. Each set of arms are expandable by corresponding longitudinally movable cones spaced apart along the tubular member. The apparatus further includes a seal located between the first and second sets of radially expandable arms and a selectably longitudinally compressible sleeve located between the first and second sets of radially expandable arms.

Abstract: An sleeve valve for a well assembly includes at least one set of passages extending through a tubular body between the central passage and an exterior of the tubular body and a sleeve slidably located within the central passage of the valve body adapted to selectably sealably cover or uncover the at least one sets of passages. A shifting tool for actuating the sleeve valve is connectable to a tool string and includes a shifting bore with an actuating piston extending from a central bore through the shifting tool and first and second key bores extending radially inwards from the outer surface each having a piston keys located therein. Each of the first and second piston keys is operably connected to the actuating piston so as to be extended from the outer surface when the central bore is supplied with a pressurized fluid.

Abstract: A method and apparatus for centering and engaging a casing against a wellbore. The apparatus comprises a valve body locatable in-line with the casing the valve body having an outer casing extending between first and second ends and a central passage therethrough, and at least one radially movable body extending therethrough. Each radially movable body has an aperture therethrough so as to permit an exterior of the valve body and the central passage to be in fluidic communication with each other. The apparatus further comprises a cylinder and a piston therein operable connected to the radially movable body in selective fluidic communication with the central passage. The method comprises locating the valve body in line with a wellbore casing, pressurizing the casing with a pressurizing fluid and transmitting the pressurizing fluid the cylinder so as to displace a piston located therein and extend the radially movable body.