An apparatus (10) for downhole data acquisition and/or monitoring is configured to be disposed within a completion (12) and comprises a hanger (36) configured to latch into a control line spool (38), a retrofit valve (40) for location within the subsurface safety valve (16) of the completion (12), and a sensing arrangement (42) including an optical fiber line (44). In use, the apparatus (10) is configured to be run into the completion (12) and is operable to provide data acquisition and/or monitoring capability in the well, including up or near total depth and in particular but not exclusively in the region of the well subjected to an intervention operation, such as a chemical injection operation.

A retrievable in-flow control device (ICD) including a device body having a first end, a second end, an outer surface extending between the first end and the second end, and an internal flow path. A wireline connector is arranged at the first end. A latch mechanism is provided on one of the wireline connector and the device body. A flow control port extends through the outer surface to the internal flow path. An equalizer member including a first flow path for passing a first fluid and a second flow path for resisting flow of a second fluid. The retrievable ICD also includes a flow control device establishes a selected pressure drop of the first fluid through the retrievable ICD.

A system for controlling fluid flow in a subterranean well includes a first valve, a control line fluidly coupled to the first valve, an equalizing line disposed externally to and separate from the first valve, and at least a second valve disposed in the equalizing line and in fluid communication with the control line. The first valve includes a body defining a lumen, and an upper portion, and a lower portion. The equalizing line is in fluid communication with the lumen between the upper portion and the lower portion of the body. The second valve equalizes a pressure between the upper and lower portions of the body.

A surface-controlled wireline-retrievable safety valve includes a seat housing having a plurality of flow ports that is configured to house a hard seat. A closure device has a plurality of equalization ports, is disposed within the seat housing, and is configured to controllably move off the hard seat and expose the plurality of flow ports to a central lumen of the safety valve under hydraulic actuation. A power piston having a shoulder portion includes a top end that is attached to the closure device and the shoulder portion is disposed within a hydraulic chamber housing forming a differential area. A hydraulic actuation port may be configured to receive hydraulic actuation fluid from a surface pump. A hydraulic passage may be configured to convey the hydraulic actuation fluid from the hydraulic actuation port to the differential area via a hydraulic access port.

A technique facilitates monitoring of parameters related to a downhole operation, e.g. a water injection operation. A completion string may be deployed in a borehole with at least one water injection mandrel combined with a side pocket. A sensor tool is constructed for conveyance down through the completion string and into sealing engagement with the interior surface of the side pocket. The sensor tool comprises at least one sensor for sensing a desired parameter or parameters, e.g. pressure and/or temperature. Additionally, the sensor tool comprises a nose which is positioned to mechanically open a check valve coupled to the side pocket so as to enable monitoring of the desired parameter or parameters via the at least one sensor.

A downhole nipple assembly includes a main body with a central bore configured to receive a hydraulically operated wireline-retrievable subsurface safety valve (WLSSSV and a pressure chamber open to the central bore via a sidewall port. The pressure chamber is configured to receive a volume of wellbore fluid from the central bore via the sidewall port as the nipple assembly is disposed within the wellbore prior to receipt of the WLSSSV in the central bore, and such that the sidewall port is in fluid communication with a pressure inlet port of the WLSSSV is locked in the central bore. The nipple assembly also includes an electrically operated piston assembly comprising a motor operable to drive a piston in response to an electric signal, thereby decreasing the volume of the pressure chamber and generating an increase in hydraulic pressure of the wellbore fluid at the pressure inlet port of the WLSSSV.

A method can include positioning a tubular string in a riser string including an outer housing of a pressure control device and an annular seal operable to prevent flow through an annulus between the tubular and riser strings, the tubular string including an equalization valve and a running tool operable to convey a releasable assembly of the pressure control device through the riser string, and opening the equalization valve, thereby permitting fluid communication between the annulus and a flow passage extending longitudinally through the tubular string. A system can include a riser string including an annular blowout preventer with an annular seal, a tubular string including a running tool and an equalization valve releasably attachable to a releasable assembly including an annular seal, and the equalization valve selectively preventing and permitting fluid communication between a flow passage of the tubular string and an annulus between the annular seals.

A valve system for use in a wellbore, comprising a side pocket mandrel having a main bore for alignment with a wellbore tubular and a laterally offset side pocket bore separated from the main bore by an internal wall, the laterally offset side pocket bore comprising a first receptacle for a first device and a second receptacle for a second device, the internal wall having an opening through which each of the first device and the second device is independently retrievable. There is also provided a side pocket mandrel, a hydrocarbon well and a method of operating a hydrocarbon well.

A tubular system includes a side pocket mandrel having at least one side pocket defining a device storage zone. A conductor extends along the tubular system to the side pocket. A stored device is arranged in the device storage zone.

Programmable plug system for accessing and isolating formations during hydraulic fracturing, consisting of a Programmable Plug and plurality of Sliding Sleeve Valves installed in the casing string of a wellbore wherein Programmable Plug travels down the casing string, through the casing and Sliding Sleeve Valves wherein during its passage the Programmable Plug recognizes and counts each sleeve using on-board sensors, electronics and software and wherein the Programmable Plug utilizes recognition information to locate, activate and set itself into the Sliding Sleeve Valve according to programmed sequence stored in the on-board memory wherein this activation and setting of the Programmable Plug forms physical coupling between Programmable Plug and allows the Programmable Plug to engage and actuate the Sliding Sleeve and wherein applying the pressure from the surface causes opening of the Sliding Sleeve Valve, wherein this opening provides access to the zone adjacent to the Sliding Sleeve Valve while sealing and isolating the zones below the Sliding Sleeve Valve and wherein applying the pressure in the opposite direction, or pulling on the winch attached to the Programmable Plug causes the Programmable Plug to unset itself and travel up the casing string towards the next Sliding Sleeve Valve where setting, actuation, and opening is repeated for that Sliding Sleeve Valve.