Abstract: A well construction method in which a drilled bore is lined with a plurality of successively smaller diameter sections of bore-lining tubing including casing sections a liner section is provided. A liner is provided with an inner string extending to a distal end of the liner. The liner and the inner string are run into a distal section of a drilled bore. Settable material is pumped from surface through the inner string and through the distal end of the liner to partially fill an outer annulus surrounding the liner. Fluid displaced from the outer annulus and a portion of the settable material is permitted to flow from the outer annulus through a port in the liner and into an inner annulus between the inner string and the liner.

Abstract: A downhole sealing apparatus for location in a downhole tubular includes a ball and a downhole seat. The ball may comprise a rigid core and a deformable covering. The ball is translatable downhole towards the seat, the ball and the seat having an open first configuration and a sealing second configuration. In the open first configuration the ball and seat are spaced apart such that fluid may flow through the seat. In the sealing second configuration the ball and the seat are in sealing engagement and the ball is deformed to maintain the sealing engagement with the seat in response to a differential pressure acting in a first axial direction and in response to a differential pressure acting in an opposite second axial direction.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a valve member that comprises a first port associated with the first port of the tubular body; and a second port associated with the second port of the tubular body. The valve arrangement is configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed. The valve arrangement is configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed. The valve arrangement is configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement comprising a first valve member associated with the first port of the tubular body; and a second valve arrangement comprising a second valve member associated with the second port of the tubular body. The first valve arrangement and the second valve arrangement are configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; to lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and to lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A method comprising operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the first valve arrangement comprises one or more locking devices configured to lock a first valve member of the first valve arrangement in place relative to the tubular body. The method comprising operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement associated with the first port and comprising a first valve; and a second valve arrangement associated with the second port comprising a second valve. The valve arrangement is configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A coupling connects an inner string to a lower end of a bore-lining tubing, such as a liner. The coupling includes a catcher and may be provided in combination with at least one member for translating through the inner string and landing in the catcher. The member may be an occluding member, such as a ball for occluding a flow passage through the coupling.

Abstract: A method comprises operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed. The method comprises operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open; and moving the first valve arrangement to a third intermediate configuration between a second intermediate configuration and the third configuration, in which the first valve arrangement is locked, the second valve arrangement is locked and the first and second ports are closed.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement being configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed; configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed; and configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement comprising a first valve member associated with the first port of the tubular body; and a second valve arrangement comprising a second valve member associated with the second port of the tubular body. The first valve arrangement and the second valve arrangement are configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; to lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and to lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A method of locating bore-lining tubing, such as a liner (120), in a drilled bore (106) comprises selecting a buoyant material, such as air (138), having a density lower than the density of an ambient fluid, such as well fluid (180, 182). The buoyant material (138) and an inner tubing (140) are located within the bore-lining tubing (120) with the inner tubing (140) extending from a distal end of the bore-lining tubing to a proximal end of the bore-lining tubing. The inner tubing (140) is sealed to the distal end of the bore-lining tubing (120) and to a portion of the bore-lining tubing (120) spaced from the distal end to define an inner annulus (152) between the inner tubing (140) and the bore-lining tubing (120). A volume of the buoyant material (138) is retained within the inner annulus (152). An assembly (168) comprising the inner tubing (140) and the bore-lining tubing (120) and containing the volume of buoyant material (138) is run into a drilled bore (106).

Abstract: A downhole apparatus comprises a tubular body having first and second ports in a wall thereof and a first valve arrangement associated with the first port. The downhole apparatus includes a second valve arrangement associated with the second port and a sand control element operable to move between a first deactivated state to a second activated state, wherein the sand control element is in fluid communication with the first port of the tubular body.

Abstract: A method comprises operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed. The method comprises operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open; and moving the first valve arrangement to a third intermediate configuration between a second intermediate configuration and the third configuration, in which the first valve arrangement is locked, the second valve arrangement is locked and the first and second ports are closed.

Abstract: A method of operating a valve arrangement of a downhole apparatus (that includes a tubular body having first and second ports in a wall thereof) comprising operating the valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the valve arrangement includes a valve member including a first port, the first port associated with the first port of the tubular body, and a second port associated with the second port of the tubular body, wherein the valve arrangement comprises a further retaining member. The method includes operating the valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open.

Abstract: A method of operating a valve arrangement of a downhole apparatus comprising a tubular body having first and second ports in a wall thereof includes operating the valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the locked first configuration is an initial configuration of the valve arrangement. The method includes operating the valve arrangement from tile locked second configuration to a third configuration, in which the first port is closed and the second port is open.

Abstract: A method comprising operating a first valve arrangement and a second valve arrangement from a locked first configuration, in which the first port is closed and the second port is closed, to a locked second configuration, in which the first port is open and the second port is closed, wherein the first valve arrangement comprises one or more locking devices configured to lock a first valve member of the first valve arrangement in place relative to the tubular body. The method comprising operating the first valve arrangement and the second valve arrangement from the locked second configuration to a third configuration, in which the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a valve member that comprises a first port associated with the first port of the tubular body; and a second port associated with the second port of the tubular body. The valve arrangement is configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed. The valve arrangement is configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed. The valve arrangement is configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement comprises a first valve arrangement associated with the first port and comprising a first valve; and a second valve arrangement associated with the second port comprising a second valve. The valve arrangement is configurable to lock in a first configuration with the tubular body, such that the first port is closed and the second port is closed; lock in a second configuration with the tubular body, such that the first port is open and the second port is closed; and lock in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: A valve arrangement is for a downhole apparatus having a tubular body having first and second ports in a wall thereof. The valve arrangement being configurable to be locked in a first configuration with the tubular body, such that the first port is closed and the second port is closed; configurable to be locked in a second configuration with the tubular body, such that the first port is open and the second port is closed; and configurable to be locked in a third configuration with the tubular body, such that the first port is closed and the second port is open.

Abstract: The present invention relates to a downhole apparatus and a valve arrangement for a downhole apparatus having a tubular body having first and second ports in a wall thereof; and a method of operating a valve arrangement of a downhole apparatus. The valve arrangement has at least one locked configuration and the first port provides fluid communication with a tool or a device which is a sand control element having at least one fluid deformable device. The present invention also provides a method of setting a sand control completion, extending the sand control filter element thereof to a wellbore surface and isolating the reservoir from an upper portion of the wellbore.