A counter including a housing disposed about a tubular creating a space therebetween, a piston disposed in the space and responsive to pressure up events in the tubular to compress a transfer chamber, a supply chamber fluidly attached to the transfer chamber; a trigger chamber fluidly attached to the transfer chamber wherein sequential pressure events cause the piston to move fluid from the supply chamber to the trigger chamber. A counter including a fluid incrementing configuration, an activation member in fluid force communication with the fluid incrementing configuration, the activation member having a first position where a fluid port is blocked and a second position where the fluid port is unblocked, the fluid port being fluid pressure connected to a tool to be actuated when the activation member is in the second position.

A port sub comprises one or more standard flow ports, each having a low-pressure port assembly positioned therein to, and at least one control flow port having a high-pressure port assembly positioned therein. The low-pressure port assembly comprises an inner layer having a first rupture pressure and an outer layer configured to remain intact upon the rupturing of the inner layer. The high-pressure port assembly comprises an inner layer having a second rupture pressure that is greater than the first rupture pressure. The high-pressure port assembly is configured to be broken through upon the rupturing of its inner layer to allow fluid flow through the at least one control flow port, thereby allowing a dissolve fluid to flow therethrough to facilitate the disintegration of the outer layer of the low-pressure port assembly to open the one or more standard flow ports.

In an embodiment is provided a valve that includes a housing, a mandrel connected to the housing and defining an interior volume therebetween, a sleeve having a first end and a second end, the sleeve movably disposed in the interior volume, a chamber defined in the interior volume, the chamber having a first end and a second end, an inlet of a metering device coupled to the second end of the chamber, and an outlet of the metering device adjacent to the first end of the sleeve. In another embodiment is provided a method of using a valve that includes introducing pressure to a central bore of the valve such that a sleeve of the valve moves from a closed, locked position to a test position. The closed, locked position and the test position do not permit fluid communication between a central bore and an exterior of the valve.

A flow transported obturating tool for actuating a valve in a wellbore includes a housing including a first engagement member and a second engagement member, wherein the first and second engagement members each include an unlocked and a locked position, and a core disposed in the housing, wherein the core is configured to actuate both the first engagement member and the second engagement member between the unlocked and locked positions, wherein, when the first engagement member is in the locked position, the first engagement member is configured to locate the obturating tool at a predetermined axial position in the valve, wherein, when the second engagement member is in the locked position, the second engagement member is configured to shift the valve from an open position to a closed position.

A wellbore apparatus to control the flow of fluids into the wellbore, comprising: a housing; a passage disposed within the housing; a flow communicator for allowing communication into the passage; a flow control member; and frangible members releasably retaining the flow control member to the housing in a retained position, and configured, while the apparatus is disposed in an operative orientation, for becoming fractured in response to application of a force in a downhole direction to release the flow control member from the housing such that the flow control member becomes displaceable relative to the flow communicator; wherein: the flow communicator and the flow control member are configured such that, while the apparatus is disposed in the operative orientation within the wellbore, the flow control member is disposed uphole relative to the retained position while the flow communicator is disposed in the open condition.

A stage cementing system includes a stage cementing assembly having a stage tool. The stage tool has an outer mandrel, an inner mandrel coupled to and disposed inside of the outer mandrel, an annular chamber between the outer mandrel and the inner mandrel, a first outer port through the outer mandrel, and longitudinally spaced first and second inner ports through the inner mandrel. The stage cementing system further includes an inner string assembly configured to be located inside the inner mandrel. The inner string assembly has a tubular body having a central throughbore and longitudinally spaced first and second side ports, a lower external seal element below the first and second side ports, a middle external seal element between the first and second side ports, and an upper external seal element above the first and second side ports.

A counter including a housing disposed about a tubular creating a space therebetween, a piston disposed in the space and responsive to pressure up events in the tubular to compress a transfer chamber, a supply chamber fluidly attached to the transfer chamber; a trigger chamber fluidly attached to the transfer chamber wherein sequential pressure events cause the piston to move fluid from the supply chamber to the trigger chamber. A counter including a fluid incrementing configuration, an activation member in fluid force communication with the fluid incrementing configuration, the activation member having a first position where a fluid port is blocked and a second position where the fluid port is unblocked, the fluid port being fluid pressure connected to a tool to be actuated when the activation member is in the second position.

Stimulation sleeve (1) for well intervention in a subterranean wellbore, comprising: a housing (10) having a through channel (11) with a first end (11a) and a second end (11b), and one or more flow ports (14), and a sliding sleeve (13) disposed axially movable within the housing (10) to open or close said flow ports (14). Said sliding sleeve (13) is equipped with at least a first obturator seat (15) for receipt of a obturator (17) to partially or fully close fluid communication in the through channel (11) of the housing (10), and a time delay mechanism (20) to allow the sliding sleeve (13) to axially travel in the housing (10) at a predetermined speed to open or close said flow ports (14). The invention also discloses a method for well completion in a subterranean wellbore using a sliding sleeve (1).

Stimulation sleeve (1) for well intervention in a subterranean wellbore, comprising: a housing (10) having a through channel (11) with a first end (11a) and a second end (11b), and one or more flow ports (14), and a sliding sleeve (13) disposed axially movable within the housing (10) to open or close said flow ports (14). Said sliding sleeve (13) is equipped with at least a first obturator seat (15) for receipt of a obturator (17) to partially or fully close fluid communication in the through channel (11) of the housing (10), and a time delay mechanism (20) to allow the sliding sleeve (13) to axially travel in the housing (10) at a predetermined speed to open or close said flow ports (14). The invention also discloses a method for well completion in a subterranean wellbore using a sliding sleeve (1).

A downhole tool for time delaying a downhole activity. The downhole tool includes a housing having a bore; a moving sleeve configured to move relative to the housing; an electronic valve configured to open and close when receiving an electrical signal; and a switch that is responsive to a fluid pressure inside the bore. The downhole tool electronically counts down a set time.