Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.

Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.

Abstract: A stage tool includes an isolation mechanism for isolating the lower bore of a completion string. The isolation mechanism is initially in a deactivated configuration until sufficient hydraulic pressure is applied, at which time, the isolating mechanism is activated to isolate the lower bore from cement ingress. Concurrently or subsequently, a stage tool may be opened to facilitate cementing of an annulus between the completion string and the wellbore. After cementing, the isolation mechanism, or portions thereof, may be drilled out to re-establish flow through the stage tool.

Abstract: Downhole drop plugs, frac sleeves, and downhole plug-operated valves. The drop plugs may incorporate a ring part and a rod part. The valves may incorporate a bypass to accommodate material that gets stuck in the valve on flowback. The valves may incorporate a compound seat that passes a first ball of a first size and seats a second ball of the first size. Locking seats, dissolvable balls, and dissolvable mandrels are illustrated and discussed as well.

Abstract: A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.

Abstract: A stage tool includes an isolation mechanism for isolating the lower bore of a completion string. The isolation mechanism is initially in a deactivated configuration until sufficient hydraulic pressure is applied, at which time, the isolating mechanism is activated to isolate the lower bore from cement ingress. Concurrently or subsequently, a stage tool may be opened to facilitate cementing of an annulus between the completion string and the wellbore. After cementing, the isolation mechanism, or portions thereof, may be drilled out to re-establish flow through the stage tool.

Abstract: In one embodiment, a network device determines identities of each peer device in a second routing domain attached to edge devices in a first routing domain. The network device associates each address prefix reachable in the second routing domain with an identity of each peer device in the second routing domain that advertised the address prefix and with an identity of one or more edge devices in the first routing domain to which that peer device is attached. The network device determines an address prefix is associated with a same identity of a peer device in the second routing domain but with different edge devices in the first routing domain. The network device assigns the different edge devices in the first routing domain associated with the determined address prefix to a shared risk node group (SRNG).

Abstract: A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.

Abstract: The present invention generally relates to injecting steam into a wellbore using a device. The device includes a body having a bore configured to communicate steam through the body. The device also includes a sleeve movable in the bore of the body between a first position and a second position, wherein the sleeve in the first position blocks steam from exiting an opening of the body and the sleeve in the second position allows steam to exit the opening of the body. The device further includes a shroud disposed on a portion of the body such that an annulus is formed between the shroud and the body, wherein the annulus is configured to direct steam from the opening in the body toward steam outlets. In another aspect, a method of injecting steam into a wellbore using a steam tubular is provided.

Abstract: A liner hanger having a mechanical coupling between a liner hanger body and one or more cones is disclosed. The cones are coupled to the liner hanger body to resist axial and relative rotational movement without welding the cones to the hanger body, and without the need to use integral cones. In general, the mechanical coupling includes a hanger body or casing mandrel, a cone assembly journaled on the casing mandrel, at least one slot or groove in an outer wall of the casing mandrel, and at least one partially or fully annular slot on the inside surface of the cone assembly oriented to correspond with the groove(s) in the outer wall of the hanger body. At least one wire, or one or more bearings, is situated in the corresponding slot and the groove. The wire engages the flanks of the slot and groove sufficiently to resist axial or rotational movement of the cones relative to the hanger body.

Abstract: A technique for deploying a liner within a wellbore. The technique utilizes a flush bore running tool that may be coupled to the interior of the liner during deployment of the liner. The mechanism for coupling the running tool and the liner permits the use of the full diameter of the liner after the running tool is released and removed from the liner.

Abstract: A technique for deploying a liner within a wellbore. The technique utilizes a flush bore running tool that may be coupled to the interior of the liner during deployment of the liner. The mechanism for coupling the running tool and the liner permits the use of the full diameter of the liner after the running tool is released and removed from the liner.

Abstract: An apparatus for drilling holes in the steel casing of an a oil or gas well, and drilling into the surrounding earth, includes a number of components controlled by hydraulic fluid. A first hydraulic motor drives a steel milling assembly and a second hydraulic motor drives a rock drilling assembly. All assemblies are supported in a housing that is conveyed by conventional jointed pipe or coiled tubing down the well casing. Control components cause a carriage carrying the milling assembly to be indexed up a predetermined distance relative to the well casing, and then extend a mill bit gradually into contact with the well casing while being rotated by a hydraulic motor. After the mill bit completes a hole through the well casing, the hydraulic components retract the mill bit and index the carriage back down to its starting position to align a rock drilling bit with the hole that was just drilled in the casing.