A recirculating gravel pack system includes a tubular member having an outer surface, an inner surface defining a flow path, a first opening extending from the inner surface through the outer surface and a second opening, spaced from the first opening extending from the inner surface through the outer surface. A screen is positioned about the tubular member spaced from the outer surface defining a passage that is selectively fluidically connected to the second opening. A return tube extends between the screen and the outer surface running axially along the tubular member. The return tube includes a first end defining an inlet arranged in the passage and a second end defining an outlet positioned in a low-pressure zone outside the passage downhole from the first opening.

A valve apparatus that includes a first containment area having a fluid disposed therein at a first fluid pressure and a second containment area disposed below the first containment area having a fluid disposed therein at a selective fluid pressure where the selective fluid pressure can be increased and decreased, the second containment area in fluid communication with the first containment area. The valve apparatus also includes a valve disposed between the fluid in the second containment area at the selective fluid pressure and the fluid in the first containment area at the first fluid pressure. The valve apparatus includes a third containment area disposed below the second containment area having a fluid disposed therein at a third fluid pressure wherein the third fluid pressure is higher than the first fluid pressure, the second containment area in fluid communication with the third containment area. Furthermore, the valve apparatus includes a second valve disposed between the fluid in the third containment area at the third fluid pressure and the fluid in the second containment area at the selective fluid pressure. A method for passing an object through the valve apparatus from a low pressure area to a high pressure system.

Systems and methods include a plug activated mechanical isolation device that controls fluid flow inside a tubular in a wellbore. The device includes a sleeve for coupling to the tubular, and the sleeve includes an internal bore and port for fluid flow therethrough. A channel element is positioned in the internal bore and includes an internal channel and an orifice for fluid flow between the internal channel and internal bore. The channel element is attached to the sleeve via a breakable attachment portion, and the orifice is aligned with at least one port of the sleeve. The channel element is slidable within the sleeve, upon breakage of the breakable attachment portion with a force, to move the orifice out of alignment with the port of the sleeve so that a portion of the channel element covers the port of the sleeve to block fluid flow through the port.

Provided is an electro/hydraulic valve for use in a hydrocarbon production well, an electrically surface-controlled subsurface safety valve, and a method of operating an electrically surface-controlled subsurface safety valve. The electro/hydraulic valve for use in a hydrocarbon production well, in one aspect, includes a fluid chamber, and an electro/thermal expansion pump having a fluid inlet and a fluid outlet, and further wherein an inlet check valve is positioned in fluid communication between the fluid chamber and the fluid inlet and an outlet check valve is positioned in fluid communication between the fluid outlet and a hydraulically controlled actuation member.

A method and apparatus for completing a well that includes a subsurface barrier valve utilizes an injection valve which includes a variable orifice insert. The injection valve includes a mechanism for sensing pressure cycles that are employed during various well completion operations including pressure testing. The mechanism includes an indexing sleeve which will disable pressure functionality. Once this occurs, pressure cycling to open the barrier valve can proceed. Once the barrier valve opens, flow alone controls the injection valve during normal operations.

A zonal isolation device conveyed into the wellbore with a propped flapper valve. The zonal isolation device comprises a deformable sealing element and a support ring movably disposed within the inner bore of the sealing element. A flapper valve coupled to the support ring is configured to engage a sealing surface of support ring. The flapper valve blocks fluid flow through the zonal isolation device in a fully closed position, allows unrestricted fluid flow through the zonal isolation device in a fully open position, and allows restricted fluid flow through the zonal isolation device when held by a propping component in an intermediate or partially open position. The zonal isolation device is anchored to the wellbore by an anchoring assembly engaged with a wedge coupled to the downhole end of the sealing element.

A valve having a sealing surface that is rotated 90 degrees on axial floating hinge assemblies is provided. A sleeve moves into position to protect the valve mechanism when the valve is in an open position. A sleeve locks the valve sealing element in place in either a closed or open position. The valve may be used during drilling of wells to prevent flow into the casing when the drill pipe and bit are raised above the valve.

A releasable connection for coiled tubing drilling apparatus is presented wherein the connection has an outer body configured with an inner volume, a mandrel located at least partially within the outer body and in the inner volume, a plug located with the outer body and a structural weakpoint apparatus, wherein the structural weakpoint apparatus is configured to structurally fail at a predetermined tensile load placed upon the releasable connection apparatus, wherein the structural weakpoint apparatus is configured at a lower end of the mandrel.

A valve assembly has a housing defining a flow passage therethrough. A first flapper is disposed in the housing. A first sleeve retains the flapper in an open position. At least one lock ring holds the first sleeve in a first position. A tripping ball engages a plurality of disconnected bodies in the sleeve and a force is applied to move the first sleeve from the first to a second position.

A shutoff valve device for permitting and preventing fluid flow in a production string. In one embodiments, the shutoff valve device comprising: a body comprising a borehole, wherein the body is a top sub coupled to a bottom sub via a threaded fastener; a flow tube disposed within the body's borehole and capable of axial movement within the body's borehole, comprising a flow tube borehole; a bi-directional actuator attached to a bottom opening of the flow tube, comprising flexible flaps; and a flapper valve disposed within the body's borehole, wherein the flapper valve is hingedly coupled to a top surface of the bottom sub and capable of moving between a fully opened and fully closed position.