Abstract: Disclosed is an apparatus and method for collecting downhole debris wherein the apparatus comprises a tubular member extending between first and second ends connectable to a production string connectable in fluidic communication with the production string and having an open flow path therethrough between the first and second ends, at least one coiled member extending between first and second ends, said second end being operably connected to the tubular member and a top cap secured to the first end of the coiled member and adapted to sealably close a top end of the coiled member. The method comprises extending the coiled member in response to an upward flow through the tubular member so as to permit upward flow of fluids and solid particles and compressing the coiled member in response to a downward flow so as to permit fluid flow between coils of the coiled member while retaining solid particles thereover.

Abstract: An apparatus for selectably sealing an interior bore of a completion string comprises an elongate body extending between top and bottom ends having connectors for connecting the body in line with the completion string, an interior wall forming a bore through the elongate body between top and bottom ends and a rupturable barrier member fastened to and bridging the bore, the barrier member being deformable so as to permit passage therepast after being ruptured.

Abstract: An apparatus for selectively opening a passage through a downhole casing comprises an elongate cylindrical housing defining a central bore therein and having at least one passage extending therethrough between the central bore and an exterior of the housing, the housing being configured to be located in line within a downhole casing, a ball seat slidably located within the central bore so as to be operable to selectively cover or uncover the at least one passage and a sealing sleeve slidably located within the central bore between an open and closed position wherein the sealing sleeve valve covers the at least one passage in the closed position and uncovers the at least one passage in the open position.

Abstract: An apparatus and method for assisting transportation of a tool down a wellbore. The apparatus comprises an elongate body having an exterior surface extending between top and bottom ends, a connector at the bottom end operable to be secured above the tool and at least one passage formed into the exterior surface defining a first flow path having an entrance and an exit oriented towards the top end of the elongate body. The method comprises securing the elongate body to a top end of a tool in a wellbore, directing a flow of fluid down the wellbore to a position above the elongate body, separating the flow of the fluid into an inner portion and an outer portion through radially separated paths and redirecting the inner portion to flow upwards into the outer portion of the flow of the fluid.

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 perforating a wellbore casing comprises an elongate body having a plurality of segments, each of the plurality of segments having at least one perforating shot and a control section having a casing collar locator and a controller configured to count the number of casing collars located by the casing collar locator and also configured to cause each of the plurality of perforating shots to discharge at a desired location in the wellbore casing.

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 and method for controlling the flow of a fluid from a subterranean well zone to a pipe located within a bore in the well zone. The apparatus comprises an elongate tubular body having an interior passage and a valve passage extending between an exterior of the tubular body and the interior passage with a sliding sleeve adapted to selectably cover and uncover the valve passage. A chamber is formed on one end of the sliding sleeve with an elongate narrow passage extending thereto from the exterior of the tubular body, wherein a pressure drop of the fluid through the elongate narrow passage is adapted to move the sliding sleeve between a closed and an open position. A flow restrictor between the chamber and the interior passage of the tubular body has a pressure drop dependent only upon a flow rate of the fluid therethrough.

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.