Abstract: A method for removing a flapper seat assembly that is replaceable from a safety valve positioned downhole in a wellbore is described herein. For example, the safety valve is positioned downhole in a wellbore and can include a housing. Additionally, the safety valve can include a flow tube coupled to a downhole tool. The flow tube can be removed from the safety valve in response to a first force applied by the downhole tool. A first tool profile can be coupled to a first assembly profile for coupling the downhole tool to the flapper seat assembly after removing the flow tube. A second assembly profile can be detached from a housing profile to remove the flapper seat assembly from the wellbore in response to a second force applied by the downhole tool. After removing the flapper seat assembly, a second flapper seat assembly can be attached to the safety valve.

Abstract: An expansion cone useful for expanding an expandable tubular, the expansion cone includes: a base material selected from a group consisting of alloyed steel, tungsten carbide coated alloyed steel, and cemented tungsten carbide; an intermediate buffering layer; and a coating deposited on an outer surface of the intermediate buffering layer; wherein the intermediate buffering layer is deposited between an outer surface of the steel alloy base material and the coating, wherein the intermediate buffering layer is one or more selected from a group consisting of Silicon (Si), Titanium (Ti), and silicon carbide (SiC), and wherein the coating is a diamond containing coating.

Abstract: A downhole torch system and method of use includes a cylindrical housing, a protective material provided on at least one of the cylindrical housing and the fuel load, and a fuel load located within the cylindrical housing. The protective material is provided between the fuel load and the cylindrical housing to protect the cylindrical housing from adverse effects caused by the reaction of the burning fuel and/or the subsequent production of combustion products for cutting and/or perforating processes during operation of the torch system. The protective material significantly improves the cutting and/or perforating performance of the torch system.

Abstract: An apparatus and method for assisting transportation of a tool down a wellbore. The apparatus comprises an elongate body having an exterior surface extending between top and bottom ends, a connector at the bottom end operable to be secured above the tool and at least one passage formed into the exterior surface defining a first flow path having an entrance and an exit oriented towards the top end of the elongate body. The method comprises securing the elongate body to a top end of a tool in a wellbore, directing a flow of fluid down the wellbore to a position above the elongate body, separating the flow of the fluid into an inner portion and an outer portion through radially separated paths and redirecting the inner portion to flow upwards into the outer portion of the flow of the fluid.

Abstract: The present invention relates to a locking mechanism or tool adapted for connection to a remotely operated vehicle and adapted for at least one of the group consisting of connection and disconnection of two plates. The present invention also concerns a system adapted for at least one of the group consisting of connection and disconnection of two plates, where the system comprises said locking mechanism or tool.

Abstract: An actuating tool actuable by degradation of at least a portion of a seal assembly to set an auxiliary tool downhole in an oil and gas wellbore. A system and method for actuating the auxiliary tool downhole in the oil and gas wellbore using the actuating tool by degrading at least a portion of the seal assembly of the actuating tool.

Abstract: A method of making a connection between a first tubular and a second tubular includes gripping the first tubular using a power tong; gripping the second tubular using a backup tong; applying a torque to the first tubular using a power tong; and moving the power tong at a predetermined speed to compensate for a weight of the power tong.

Abstract: A circulating sub having an elongate outer member and an elongate inner member positioned within the outer member. Locking members releasably maintain the inner and outer members in a longitudinally fixed relationship. The sub may be activated by a single ball. The ball engages with the locking members and unlocks the inner member from the outer member. The increase of fluid pressure within the sub causes the inner member to move downward within the outer member. Downward movement of the inner member opens exit ports on the outer member to allow fluid to flow into a wellbore surrounding the sub. The decrease of fluid pressure within the sub causes the inner member to move upward within the outer member. Upward movement of the inner member seals the exit ports and deactivates the sub. Once the sub is deactivated, the ball may be expelled from the sub.

Abstract: A subsea well assembly includes a high pressure wellhead housing; and a port for monitoring and/or controlling fluid within an annulus within the high pressure wellhead housing. The port extends through the high pressure wellhead housing. The subsea well assembly further includes a wellhead support for laterally supporting the high pressure wellhead housing, wherein, at an axial height of the port, the wellhead support surrounds the high pressure wellhead housing at circumferentially discrete locations and the port is located at a circumferential location where the high pressure wellhead housing is not covered by the wellhead support. A method of monitoring and/or controlling fluid within the annulus within the subsea well assembly is also provided.

Abstract: A rotating control device includes a bowl housing with an inner aperture to receive a seal and bearing assembly. A plurality of hydraulically-actuated fail-last-position latching assemblies are disposed about an outer surface of the bowl housing to controllably extend a plurality of piston-driven dogs radially into a groove of the seal and bearing assembly. The seal and bearing assembly includes a housing, a mandrel disposed within an inner aperture of the housing, a first interference-fit sealing element attached to a bottom distal end of the mandrel, a plurality of tapered-thrust bearings indirectly mounted to the housing, a preload spacer disposed between top and bottom tapered-thrust bearings, a plurality of jam nuts to adjust a preload of the tapered-thrust bearings, and a lower seal carrier attached to the seal and bearing housing comprising a plurality of dynamic sealing elements that contact the mandrel.

Abstract: A method for deploying a fiber optic line from a surface to a desired location in a wellbore includes the steps of identifying a heater cable deployed in the wellbore, where the heater cable includes one or more conductors and a first capillary tube. The method continues with the step of loading a terminal end of the fiber optic line into the first capillary tube from the surface. Next, the method includes the step of pumping a working fluid into the first capillary tube from the surface to inject the fiber optic line through a portion of the first capillary tube. The method concludes with the step of stopping the injection of the fiber optic line when the terminal end of the fiber optic line reaches the desired location in the wellbore.

Abstract: A single use setting tool for actuating a tool in a wellbore includes an inner piston extending through a central bore of an outer sleeve. The inner piston has a seal adapter portion and a piston cavity housing an initiator holder for receiving a push-in detonator. A gas diverter channel is open to and extends from the piston cavity through an annular wall of the piston, to transfer gas pressure to a gas expansion chamber for stroking the outer sleeve. A method of actuating a wellbore tool with a single use setting tool includes inserting an initiator into the initiator holder, attaching a tandem seal adapter to the seal adapter portion of the inner piston, and relaying an electrical signal to a line-in portion of the initiator, to initiate the initiator. The single use setting tool may be used in a wellbore tool string.

Abstract: A pressure control device may include a body having a central axis extending therefrom; at least one rotatable seal within the body, the rotatable seal configured to seal against a tubular extending through the pressure control device along the central axis and rotate within the body with the tubular; at least one coil within the body wrapped at least once around the central axis, wherein the at least one coil is configured to send characteristics of the tubular to a controller; an outlet to divert fluid from an annulus, wherein the outlet being located axially below the at least one rotatable seal, wherein the controller is configured to control the at least one rotatable seal and its engagement against the tubular based on the characteristics of the tubular received by the controller.

Abstract: The invention relates to a multi-stage hydraulic fracturing tool and system for controllably exposing selected locations along a wellbore to a pressurized fluid. The system comprises an elongated casing (for disposal within the wellbore) defining an internal borehole extending longitudinally, and having one or more ports; an actuation member configured for travelling down the borehole and includes a wedged portion and a groove having a first length in the longitudinal direction, formed at least partially circumferentially around an outer surface of the actuation member, a sliding sleeve member having an aperture for receiving the actuation member, and one or more inward-facing protrusions having a length less than or equal to the first length, connected to the sliding sleeve member and at least initially protruding radially into the aperture.

Abstract: The invention relates to a multi-stage hydraulic fracturing tool and system for controllably exposing selected locations along a wellbore to a pressurized fluid. The system comprises an elongated casing (for disposal within the wellbore) defining an internal borehole extending longitudinally, and having one or more ports; an actuation member configured for travelling down the borehole and includes a wedged portion and a groove having a first length in the longitudinal direction, formed at least partially circumferentially around an outer surface of the actuation member, a sliding sleeve member having an aperture for receiving the actuation member, and one or more inward-facing protrusions having a length less than or equal to the first length, connected to the sliding sleeve member and at least initially protruding radially into the aperture.

Abstract: A resettable pressure activated device (100), comprises an inner wall (102), a return spring (105), a resilient element (110) and an axially movable piston (120) arranged around the inner wall (102). The piston (120) comprises a radially extending piston area (121) in fluid communication with a central bore (101) within the inner wall (102) such that the piston (120) moves in an activation direction when a bore pressure within the central bore (101) exceeds the pressure around the device by a predetermined release pressure. The return spring (105) is configured to provide a return force that is directed opposite the activation direction and has a magnitude sufficient to return the piston (120) to an idle position when the bore pressure drops below a predetermined reset level. The resilient element (110) provides a retaining force, e.g. a friction force, equal to the difference between the release force and the return force.

Abstract: A valve system for an inner tube assembly is described. The inner tube assembly is arranged to be used in a drilling system to retrieve a core sample, and is arranged to be insertable into a drill string of the drilling system at a first end of the drill string. The valve system is arranged to be configurable in a first closed configuration, an open configuration, and a second closed configuration. The valve system moves to the first closed configuration when fluid is pumped along an interior region of the drill string towards the inner tube assembly in a direction from the first end of the drill string to the inner tube assembly. The valve system is arranged such that, when in the first closed configuration, a pressure of the fluid increases to facilitate deploying the inner tube assembly towards a second end of the drill string.

Abstract: An apparatus and method to raise and lower a well rod string is provided. The apparatus includes a top plate that engages a temporary polished rod clamp and lifting means and legs affixed to a well head. The lifting means provide elevation of the well rod string to adjust the position of the polished rod clamp relative to the carrier bar of a pumping unit.

Abstract: A milling-drilling section billet and anchoring device that is an improvement over current technology. The invention provides a device that incorporates an aluminum milling-drilling section billet and an anchoring device. The assembly is segregated into three main functional components: a setting tool connector system, an aluminum billet, and an anchoring section. The anchoring section has two slips, offset laterally and positioned 180 degrees apart on the device. When deployed, the slips lock the device in the formation and produce an offset of the billet within the formation. This angular positioning allows a milling head to be moved in a new direction from the existing well formation. Once the device is properly positioned in the wellbore, a frangible member breaks to allow removal of the setting tool prior to the renewed drilling operation.

Abstract: An apparatus for maneuvering a tool string within a borehole of a subterranean well includes a magnetic tractor casing with a central bore. A tractor body is located within the central bore of the magnetic tractor casing. A plurality of magnets are spaced along an outer surface of the tractor body, the plurality of magnets operable to generate a second magnetic field to interact with a first magnetic field of the magnetic tractor casing, to maintain an annular space between the tractor body and the magnetic tractor casing. A plurality of angled opening assemblies are spaced along the tractor body, each of the angled opening assemblies shaped to direct fluid away from the tractor body, to maintain an annular space between the magnetic tractor casing and the borehole of the subterranean well.

Abstract: A blowout preventer transport and handling system for a blowout preventer on a well rig. The system includes a skid for a receipt of a blowout preventer. A pair of trolley beams parallel to the skid are moveable between a lowered storage position and a raised use position. A trolley hoist mechanism is provided on each of the trolley beams. At least one cylinder moves the pair of trolley beams between the lowered storage position and the raised use position.

Abstract: A system of sliding valves wherein the inserts of multiple sliding valves may be shifted to an open position using a single shifting ball. Each individual sliding valve has a movable insert that, depending upon the position of the insert within the sliding valve, may either block, permit fluid to radially flow between the interior and exterior of the sliding valve at a first rate, or permit fluid to radially flow between the interior and exterior of the sliding valve at some different second rate.

Abstract: A snubbing apparatus for a wellhead has a snubbing stack with a upper sealing element and a lower sealing element that seal between the elongate string and the snubbing stack. A string driver carried by the snubbing stack manipulates the elongate string through the upper and lower sealing elements. There is a source of inert liquid connected to the snubbing stack between the upper sealing element and the lower sealing element. A pressure sensor is connected to sense the pressure below the lower sealing element and is connected to provide a pressure signal to the source of inert liquid. The source of inert liquid is configured to pressurize the snubbing stack between the upper sealing element and the lower sealing element in response to the pressure signal.

Abstract: A method for installing multiple fiber optic cables in coiled tubing in oil and gas operations.

Abstract: A method of deploying a downhole tool into a wellbore includes: lowering a cable into the wellbore; after lowering the cable, engaging a mold with an outer surface of the cable; injecting sealant into the mold and into armor of the cable, thereby sealing a portion of the cable; lowering the downhole tool to a deployment depth using the cable; engaging a seal with the sealed portion of the cable; and operating the downhole tool using the cable.

Abstract: A jack structure includes a cylinder, an air chamber piston rod disposed therein, an ejection piston rod disposed around the air chamber piston rod, a position-limiting component on top of the external cylinder, and a fastening component on top of the cylinder. The air chamber piston rod has a top with an air chamber piston, an internal portion with a first air chamber, and a sidewall with a gas passage in communication with the first air chamber. The ejection piston rod has an air chamber sealing cover, position-limiting portion, and ejection hydraulic piston. The air chamber sealing cover, ejection piston rod, air chamber piston rod, and air chamber piston together define a second air chamber communicating with the first air chamber. The ejection hydraulic piston, ejection piston rod, air chamber sealing cover, air chamber piston rod, and cylinder together define a hydraulic chamber communicating with the liquid passage.

Abstract: This device comprises a cable working line bearing a lower assembly and a winch for maneuvering the line. The hydraulic central unit (46) of the winch includes a tank (50) for storing a hydraulic control fluid, a pump (52) for driving the hydraulic fluid, connected to the tank (50) through an upstream conduit (54) and at least one hydraulic motor (56) for driving the drum (42) connected to the pump (52) through an intermediate conduit and connected to the tank (50) through a downstream conduit. The hydraulic central unit comprises a regulator (62) for the hydraulic fluid flow rate at the outlet of the pump (52). The regulator (62) is driven according to at least one hydraulic fluid pressure depending on the load exerted on the motor (56) by the rotary drum (42), said or each pressure being directly taken on one of said conduits.

Abstract: A rotating control device comprises an outer housing having a bore for receiving a tubular member. An inner housing and a piston assembly are rotatably disposed within the outer housing. An annular sealing assembly is disposed between the piston assembly and the inner housing so that axial movement of the piston assembly moves the annular sealing assembly into sealing engagement with the inner housing and the tubular member. A plurality of bearings is disposed between the inner housing and the outer housing. At least one of the plurality of bearings is a hydrodynamic journal bearing.

Abstract: Apparatuses and methods used for actuating downhole tools in which a ball is dropped from a surface of a wellbore until it contacts a ball seat of a downhole tool. The ball seat moves axially downward within the downhole tool and an expandable ball seating surface of the ball seat radially expands to pass the ball. The ball seat then moves axially upward within the downhole tool.

Abstract: A multiplier sleeve has a releasable seat coupled to a dog within the slidable sleeve allows a single sized ball, dart, or plug to actuate several sliding sleeves. Upon actuation by properly sized ball the ball, slidable sleeve, seat, and dog move downward where the dog is no longer supported allowing the seat to move within the slidable sleeve to a point where the seat is no longer supported thereby releasing the ball. With the slidable sleeve moved downward the port or ports in the sliding sleeve is exposed. A staged port and piston assembly inserted into the ports maintain pressure within the tubular assembly to allow the ball to move through and actuate the targeted sliding sleeves.

Abstract: A wellbore servicing apparatus comprising a housing defining an axial flowbore and comprising one or more ports providing a route of fluid communication between the axial flowbore and an exterior of the housing, a sliding sleeve disposed within the housing and comprising a seat and an orifice, the sliding sleeve being movable from a first position in which the ports are obstructed by the sliding sleeve to a second position in which the ports are unobstructed by the sliding sleeve, and the seat being configured to engage and retain an obturating member, and a fluid delay system comprising a fluid chamber containing a fluid, wherein the fluid delay system is operable to allow the sliding sleeve to transition from the first position to the second position at a delayed rate.

Abstract: A lock assembly for a mechanically set packer for deep deployments is described. The lock housing wall has at least one bore for a rod piston that is selectively actuated when wellbore hydrostatic is allowed to reach on side of the piston. Movement of the piston, after breaking a shear pin, allows a c-ring to spring outwardly and out of a locking groove in the mandrel so that the mandrel can be string manipulated with respect to the housing to set the packer. Once unlocked the lock assembly remains defeated. The piston can be optionally exposed to hydrostatic and will unlock at a given depth without manipulation of the wellbore annulus pressure. Other mechanisms to admit wellbore hydrostatic to move the piston or to move the piston in general by other techniques are described.

Abstract: A downhole tool includes a pressure activated flow switch for selectively actuating and deactuating a device, such as a reaming block. The flow switch is deployed external to the flow bore and includes a flow piston configured to reciprocate between axially opposed open and closed positions such that the device is actuated when the flow piston is in the open position and deactuated when the flow piston is in the closed position. The flow piston is configured to translate from the closed position to the open position when a differential pressure exceeds a predetermined threshold. The flow piston may be further configured to remain in the open position at differential pressures less than the threshold.

Abstract: The disclosed invention introduces an efficient lifting mechanism for reciprocating vertically a load system, the load consisting of the aggregate weights of a cargo payload in conjunction with “dead weights” of moving parts of the lifting apparatus. The disclosed invention uses a hydro-pneumatic linear actuator to lift the load and a pressurized accumulator, acting as a force intensifier. The pressurized accumulator, acting as a self-contained stored energy source, provides to the actuator adequate power to lift the “dead weights” plus part of the cargo payload. An external power source provides to the actuator adequate power to lift the remainder of the cargo payload. The disclosed invention saves significant amounts of power and energy in applications in which the “dead weights” are sizable compared to the cargo load. The disclosed invention provides also exceptional means for accurate motion control of the cargo payload.

Abstract: An improved method and apparatus for dropping a ball, plug or dart during oil and gas well operations (e.g., cementing operations) employs a specially configured valving member with curved and flat portions that alternatively direct fluid flow through a bore or opening in the valving member via an inner channel or around the periphery of the valving member in an outer channel. In one embodiment, the ball(s), dart(s) or plug(s) are contained in a sliding sleeve that shifts position responsive to valve rotation. An optional indicator indicates to a user or operator that a ball or plug has passed a selected one of the valving members.

Abstract: A method and apparatus for a wellbore assembly. The wellbore assembly may comprise a conveyance member including at least one of a continuous spooled rod, a wireline, and a slickline; an accumulator system connected to the conveyance member; and a setting tool connected to the accumulator system. The accumulator system may be configured to supply a fluid pressure to actuate the setting tool. A method of operating a wellbore tool may comprise lowering a wellbore assembly into a wellbore using a conveyance member including at least one of a continuous spooled rod, a wireline, and a slickline, wherein the wellbore assembly includes an accumulator system and a setting tool. The method may comprise actuating the accumulator system to provide a fluid pressure to the setting tool. The method may comprise actuating the setting tool using the fluid pressure.

Abstract: A down hole well tool for installing a casing or liner in a well bore includes a tool unit and an expansion module for expansion of the casing or liner. The expansion module has at least two sets of rolling means arranged along an axial direction of the expansion module, and each set of rolling means is provided at an outer circumference of the expansion module. The diameter of the rolling means decreases at least between the two sets along the expansion module, providing the expansion module with a decreasing diameter in an axial down hole direction of the well bore.

Abstract: A system for controlling a first module, a second module, and a third module. The system includes: an inlet configured to receive fluid from a fluid source; a first double-stage valve; and a second double-stage valve. The first double-stage valve is actuatable to a first position wherein fluid from the inlet flows through the first double-stage valve to the second double-stage valve and a second position wherein fluid from the inlet flows through the first double-stage valve to the third module. The second double-stage valve is actuatable to a first position wherein fluid flows from the first double-stage valve to the first module and a second position wherein fluid flows from the first double-stage valve to the second module.

Abstract: A hydraulic wellbore anchoring system for use with whipstocks or other tools in either cased or open hole wellbores. The anchoring system includes an upper slip system and a lower slip system. The anchor system may be set using hydraulic pressure and withdrawn by a predetermined upward force. While the slips of the upper and lower slip systems may be set substantially simultaneously, the anchoring system enables sequential disengagement of the slips to reduce the force required for withdrawal.

Abstract: A fluid container reloading tool for a downhole fluid sampling tool (114) is described. The reloading tool includes an elongated cylindrical body. The body may include a bottom opening sized to engage with a fluid sampling tool deployed within a borehole. A cache (263) of empty fluid containers (210) may be included within the body (201). A piston may be coupled to at least one of the fluid containers in the cache of fluid containers. The piston may be used to transfer the cache of fluid containers into the fluid sampling tool. The reloading tool may also include a pump in fluid communication with the piston.

Abstract: A wellbore servicing apparatus, comprising a housing defining an axial flowbore and comprising ports, a first sleeve, a second sleeve movable relative to the housing from (a) a first position in which the second sleeve obstructs fluid communication via the ports of the housing to (b) a second position in which the second sleeve allows fluid communication via the ports of the housing, and wherein the first sleeve is movable relative to the housing from (a) a first position in which the first sleeve does not allow a fluid pressure applied to the axial flowbore to move the second sleeve from the first position to the second position to (b) a second position in which the first sleeve allows a fluid pressure applied to the axial flowbore to move the second sleeve from the first position to the second position, and an expandable seat.

Abstract: Methods of actuating a well tool can include releasing chemical energy from at least one portion of a reactive material, thermally expanding a substance in response to the released chemical energy, and applying pressure to a piston as a result of thermally expanding the substance, thereby actuating the well tool, with these steps being repeated for each of multiple actuations of the well tool. A well tool actuator can include a substance contained in a chamber, one or more portions of a reactive material from which chemical energy is released, and a piston to which pressure is applied due to thermal expansion of the substance in response to each release of chemical energy. A well tool actuator which can be actuated multiple times may include multiple portions of a gas generating reactive material, and a piston to which pressure is applied due to generation of the gas.

Abstract: A method for reverse circulating a tool upwardly through a wellbore, the method including: providing a manipulator tool including an upper end and a lower end, conveying the manipulator tool down hole to a position adjacent a downhole tool, using the manipulator tool to manipulate the downhole tool, and reversing fluid flow through the well to create a pressure differential about at least one of the manipulator tool and the downhole tool such that the at least one of the manipulator tool and the downhole tool is lifted upwardly through the wellbore. A manipulator tool for use in a reverse circulating method is also described as are a tool catcher, a tool catching assembly and a tool catching method.

Abstract: An adjustable pressure hydrostatic setting module includes a collapsible pressure chamber and a setting chamber. The pressure chamber is precharged at a fluid pressure that is greater than atmospheric pressure and greater than the fluid pressure within the setting chamber. In a described embodiment, the setting module also includes a frangible rupture member that closes off the setting chamber from annulus pressure. A regulator governs the transfer of fluid pressure from the collapsible chamber to the setting chamber.

Abstract: A plunger system for maximizing the liquid lift potential of a plunger arranged for vertical travel in a conduit in a gas/oil production well. The plunger system comprises an elongated plunger body mandrel having an upper or first end and a second or lower end with a fluid transmitting bore extending longitudinally therethrough, from the second or lower end of the plunger body and into at least a central portion of the plunger body, a plurality of curvilinearly shaped, replaceable wear pads arranged in a controllably radially displaceable manner on the plunger body, and at least one fluid ejecting nozzle arranged extending through a side wall of the plunger body.

Abstract: The present invention relates to a pulling tool (1) for latching onto an object (30), such as a plug, downhole in a wellbore The pulling tool comprises a base element (10) extending in a longitudinal direction from a proximal end (10a) for being connected to a wireline tool to a distal end (10b) adapted to engage the object, and a latching mechanism (13) encircling the base element and being movable in the longitudinal direction between a deactivated position and an activated position, comprising a piston sleeve (13), a key element (17) for latching onto the downhole object, the key element being slidably received inside the piston sleeve and extending from an end of the piston sleeve towards the distal end of the base element, and a piston spring forcing (16a) the piston sleeve in the longitudinal direction towards the proximal end of the base element.

Abstract: Downhole tools that have a housing, a linearly indexing driver, a reciprocating shifter, and an actuation seat. The driver is adapted for linear indexing relative to the housing from an initial position sequentially through one or more intermediate positions to a terminal position. The shifter is adapted for axial reciprocation relative to the housing and is operatively connected to the driver and adapted to index the indexed driver from its initial position sequentially through its intermediate positions to its terminal position as the shifter reciprocates. The actuation seat is mounted on the shifter and is adapted to receive a ball for actuation of the shifter and to release the ball after the shifter has indexed the indexed driver. Thus, a series of such tools may be operated by deploying a series of balls, all of the same size, through the tools.

Abstract: System and method for circulating fluid within a well bore. A circulation sub configured with communication elements on its ends to link the sub to a downhole communication network. A slideable piston in the sub isolates or exposes an outer port on the sub to an inner fluid flow along the sub depending on a signal transmitted along the communication network. Methods for activating the circulation sub via signals transmitted along the downhole communication network.

Abstract: A method of lining a wellbore includes deploying the liner into the wellbore using a workstring and a setting tool. The method further includes engaging the setting tool with a casing or liner previously installed in the wellbore. The method further includes pressurizing a chamber formed between a seal of the setting tool and a shoe of the liner, thereby driving the liner further into the wellbore, wherein reactionary force is transferred to the previously installed casing or liner by the engaged setting tool.

Abstract: Methods of actuating a well tool can include releasing chemical energy from at least one portion of a reactive material, thermally expanding a substance in response to the released chemical energy, and applying pressure to a piston as a result of thermally expanding the substance, thereby actuating the well tool, with these steps being repeated for each of multiple actuations of the well tool. A well tool actuator can include a substance contained in a chamber, one or more portions of a reactive material from which chemical energy is released, and a piston to which pressure is applied due to thermal expansion of the substance in response to each release of chemical energy. A well tool actuator which can be actuated multiple times may include multiple portions of a gas generating reactive material, and a piston to which pressure is applied due to generation of the gas.