Abstract: A technique facilitates use of tools downhole during well operations. According to an embodiment, the technique employs a frac stack which may be coupled to a wellhead. The frac stack may include a flow control device which opens and closes a bore extending through the wellhead. A lubricator may be coupled to the frac stack. The lubricator includes a tool trap which opens and closes to facilitate controlled movement of a tool along the bore. A tool position detection system is used to detect a position of the tool in the tool trap to ensure, for example, removal of the tool from the frac stack before closure of the flow control device.

Abstract: A technique facilitates use of tools downhole during well operations. According to an embodiment, the technique employs a frac stack which may be coupled to a wellhead. The frac stack may include a flow control device which opens and closes a bore extending through the wellhead. A lubricator may be coupled to the frac stack. The lubricator includes a tool trap which opens and closes to facilitate controlled movement of a tool along the bore. A tool position detection system is used to detect a position of the tool in the tool trap to ensure, for example, removal of the tool from the frac stack before closure of the flow control device.

Abstract: A method of forming a tubular conduit in a borehole, wherein the borehole is closed by means of a pressure barrier capable of sustaining a borehole pressure and having at least one pressure sealable inlet, comprises: introducing a substantially flat, elongate flexible member into the borehole; and forming the flexible member into a tubular form to define the conduit inside the borehole below the pressure barrier. An apparatus for forming a tubular conduit in a borehole closed by a pressure barrier capable of sustaining a borehole pressure and having at least one pressure sealable inlet, comprises: a supply of a substantially flat, elongate flexible member; a feed system for introducing the member into the borehole; and a former below the pressure barrier for forming the flat member into a substantially tubular conduit in the borehole.

Abstract: A spooling apparatus for use with a well intervention system. The spooling apparatus comprises a pressure vessel capable of being maintained at the same pressure as the well, a flexible line housed in the pressure vessel such that it can be spooled into or out of the pressure vessel, and guidance means directing the flexible line to the outlet. The guidance means is arranged so as to decouple the angle of the flexible line to the outlet from the windings of the flexible line in the pressure vessel. Moreover, the apparatus can be incorporated into wellhead equipment.

Abstract: Apparatus and a method for deploying a wireline tool in a borehole. The apparatus comprises a wireline cable which is connected at a first end at the surface and is releasably connected at a second end to a first end of an umbilical cable via a first connection means. A second end of the umbilical cable is releasably connected to the logging head of a wireline tool via a first latching means, wherein the logging head provides for mechanical and electrical connection between the wireline tool and the wireline cable via the umbilical cable. The umbilical cable is surrounded by umbilical pipe downhole, and the logging head also provides for mechanical and hydraulic connection between the umbilical pipe and the wireline tool. The wireline tool is releasable from connection with the umbilical cable by a release means in the first latching means, and is capable of being pulled through the first latching means and through the umbilical pipe so that it is retrievable from the borehole.

Abstract: A method of forming a tubular conduit in a borehole, wherein the borehole is closed by means of a pressure barrier capable of sustaining a borehole pressure and having at least one pressure sealable inlet, comprises: introducing a substantially flat, elongate flexible member into the borehole; and forming the flexible member into a tubular form to define the conduit inside the borehole below the pressure barrier. An apparatus for forming a tubular conduit in a borehole closed by a pressure barrier capable of sustaining a borehole pressure and having at least one pressure sealable inlet, comprises: a supply of a substantially flat, elongate flexible member; a feed system for introducing the member into the borehole; and a former below the pressure barrier for forming the flat member into a substantially tubular conduit in the borehole.

Abstract: A method for drilling a borehole in a producing subsea wellbore wherein a flexible conduit is connected at one end to a surface vessel and at the other end via a pressurized subsea wellhead to the producing wellbore such that a remotely operated electrical drilling device (RODD) can be deployed down the flexible conduit, the method comprising: directing a RODD to the location for drilling in the wellbore; and drilling a further wellbore section with the RODD; wherein the drilling comprises drilling in underbalanced conditions with respect to the formation; and using fluids produced from the formation to transport the drill cuttings away from the drilling device.

Abstract: A method for providing a flow conduit in a pressurised well is provided. The method comprising the steps of: providing a supply of material for forming the conduit outside the well; introducing the material into the well through a pressure control system; and forming the material into a tube in the well to define the flow conduit.

Abstract: A spooling apparatus for use with a well intervention system. The spooling apparatus comprises a pressure vessel capable of being maintained at the same pressure as the well, a flexible line housed in the pressure vessel such that it can be spooled into or out of the pressure vessel, and guidance means directing the flexible line to the outlet. The guidance means is arranged so as to decouple the angle of the flexible line to the outlet from the windings of the flexible line in the pressure vessel. Moreover, the apparatus can be incorporated into wellhead equipment.

Abstract: Apparatus and a method for deploying a wireline tool in a borehole. The apparatus comprises a wireline cable which is connected at a first end at the surface and is releasably connected at a second end to a first end of an umbilical cable via a first connection means. A second end of the umbilical cable is releasably connected to the logging head of a wireline tool via a first latching means, wherein the logging head provides for mechanical and electrical connection between the wireline tool and the wireline cable via the umbilical cable. The umbilical cable is surrounded by umbilical pipe downhole, and the logging head also provides for mechanical and hydraulic connection between the umbilical pipe and the wireline tool. The wireline tool is releasable from connection with the umbilical cable by a release means in the first latching means, and is capable of being pulled through the first latching means and through the umbilical pipe so that it is retrievable from the borehole.

Abstract: An apparatus for drilling a borehole in a well is provided. The apparatus comprises a tubular conveyance system; a drilling system connected to one end of the tubular conveyance system and comprising a bottom hole assembly; and a flow diverter positioned in the tubular conveyance system and comprising a first flow channel configured to receive fluid from inside the conveyance system and at least two side flow channels configured to direct fluid from the first flow channel out of the tubular conveyance system. The fluid flow between the first flow channel and each side flow channels is controlled by a valve which is operable to divert fluid out of the tubular conveyance system or to maintain the fluid in the tubular conveyance system.

Abstract: A method for drilling a borehole in a producing subsea wellbore wherein a flexible conduit is connected at one end to a surface vessel and at the other end via a pressurized subsea wellhead to the producing wellbore such that a remotely operated electrical drilling device (RODD) can be deployed down the flexible conduit, the method comprising: directing a RODD to the location for drilling in the wellbore; and drilling a further wellbore section with the RODD; wherein the drilling comprises drilling in underbalanced conditions with respect to the formation; and using fluids produced from the formation to transport the drill cuttings away from the drilling device.