Abstract: A centralizing device is configured to centralize/decentralize an associated tool in a well. The centralizing device includes a body that extends along a longitudinal axis X, the body having a bore that extends from one end to another end of the body; a first piston shaped as a cylinder and provided around a central portion of the body; a second piston shaped as a cylinder and provided around the central portion of the body; a bridge provided around the central portion of the body, between the first and second pistons; and a pair of arms, each arm being attached with one end to a corresponding one of the first and second pistons and with another end to each other. The second piston, the bridge, and the central portion of the body define a sealed chamber, which is sealed from the ambient.

Abstract: A method includes positioning a downhole tool in a borehole formed in a subsurface formation, wherein the downhole tool comprises a plurality of calipers arranged around a circumference of the downhole tool. The method includes detecting, using the plurality of calipers, a plurality of standoff measurements at different rotation angles and determining a plurality of apparent diameters of the borehole for the different rotation angles of the downhole tool based on the plurality of standoff measurements and at least one of a radius and a diameter of the downhole tool. The method includes determining a probability function based on the plurality of apparent diameters and determining a shape of the borehole based on the probability function.

Abstract: An assembly for use in subsurface drilling includes a downhole probe supported by a centralizer. The centralizer comprises a tubular member that extends around the downhole probe. A wall of the centralizer is fluted to provide inward contact points that support the downhole probe and outward contact points that bear against a bore wall of a section of drill string. The downhole probe may be supported for substantially its entire length.

Abstract: The present invention relates to a wireline cased-hole standoff (WCSO) for installation on a wireline cable of a wellbore logging tool. In embodiments, WCSO may be capable of significantly reducing wireline cable drag in a cased-hole section of a well or wellbore as well as reduce logging tensions and improve force transmission from wellbore surface to logging tool cable head during wireline logging operations. In one embodiment, WCSO comprises two cable insert halves, two opposing WCSO body halves (an upper body and a lower body), and two outer shells (an upper low-friction shell and a lower low-friction shell). Such components may be fastened together onto the wireline cable using screws, bolts, dowel pins, spigots, or any combinations thereof.

Abstract: This invention relates to a tractor for use in a wellbore, an apparatus for use in the tractor and related methods. In one embodiment the apparatus has a body, a drive wheel and a movable arm for supporting drive wheel. The arm may be rotatably movable using an actuator such that the drive wheel can be extracted from the body and brought into engagement with a wall of the wellbore, and may be arranged to be offset from a central region of the apparatus for providing accommodation space for the actuator in the body.

Abstract: Disclosed is a rotary steering drilling apparatus.

Abstract: A steerable sub for controlling an angular orientation of a well tool in a well, the steerable sub including a housing; a steering element attached to the housing and configured (i) to partially extend out of the housing and (ii) to change an orientation relative to the housing; and an actuation mechanism connected to the steering element and configured to change the orientation of the steering element relative to the housing.

Abstract: A flexible smart release tool enables a control unit at the surface to individually communicate with release tools that are located downhole. The release tools may be individually addressed using a unique logical identifier. Thus, a specific release tool may be sent a command to release an attached downhole tool string at any time. The release tool may include control logic for receiving the command and using an onboard clock for timing of activation of a release interface, as optionally specified in the command. A heartbeat function may be implemented between the release tool and the control unit.

Abstract: A push type rotary guide drilling system includes a drill bit and a rotating shaft, the rotating shaft including an upper rotating shaft and a lower rotating shaft; a steering portion, sleeving an outer side of the rotating shaft; a push assembly, including a plurality of push pieces spaced along a circumferential direction of the steering portion; a transmission device, including a transmission mechanism for driving the push pieces to extend out of the steering portion, the transmission mechanism including a driving electromagnetic gear arranged on the upper rotating shaft and a driven electromagnetic gear arranged on the steering portion and further including a motion conversion unit converting rotary motion of the driven electromagnetic gear into linear motion of the push pieces; and a control unit. The control unit is configured to modulate a magnetic field to make the driving electromagnetic gear and the driven electromagnetic gear realize linkage through magnetic coupling.

Abstract: A centralizer assembly replaces an existing centralizer of a wireline tool so the tool can be used with smaller casing, such as casing smaller than 6-in. The assembly includes first and second centralizer units that replace the existing centralizer on a mandrel. Each unit has a sleeve that fits in a recess of the mandrel, and each unit has slider blocks disposed together in the recess on opposing sides of a divider on the sleeve. Arms hingedly connected to the blocks on each unit connect together at a joint having a roller for engaging in the casing. On each unit, a common pin is disposed through the slider blocks, and biasing elements on the common pin bias the blocks toward one another with different amounts of bias.

Abstract: A device for centering a sensor assembly in a bore comprises a plurality of arm assemblies connected between first and second support members. Each arm assembly comprises a first arm pivotally connected to the first support member by a first pivot and a second arm pivotally connected to the second support member by a second pivot joint. A beam is connected between the first and second arms, the first arm pivotally connected to the beam by a third pivot joint and the second arm pivotally connected to the beam by a fourth pivot joint. A wheel is rotationally mounted to the beam on a rotational axis located axially between the third and fourth pivot joints to contact a wall of the bore in use. A third arm is pivotally connected to the first support member by a fifth pivot joint having a fifth pivot axis axially spaced from the first pivot axis, and is pivotally connected to the beam by a sixth pivot joint having a sixth pivot axis.

Abstract: The present invention relates to a wireline cased-hole standoff (WCSO) for installation on a wireline cable of a wellbore logging tool. In embodiments, WCSO may be capable of significantly reducing wireline cable drag in a cased-hole section of a well or wellbore as well as reduce logging tensions and improve force transmission from wellbore surface to logging tool cable head during wireline logging operations. In one embodiment, WCSO comprises two cable insert halves, two opposing WCSO body halves (an upper body and a lower body), and two outer shells (an upper low-friction shell and a lower low-friction shell). Such components may be fastened together onto the wireline cable using screws, bolts, dowel pins, spigots, or any combinations thereof.

Abstract: A downhole tool and method for orienting a tool string within a passage, wherein the passage is a wellbore or a tubular member disposed in a wellbore. The downhole tool may include a frame (210) operable for connection with the tool string (100), a first orienting feature (211) connected to a first side of the frame (210), and a second orienting feature (212) connected to a second side of the frame (210). The first orienting feature (211) may be rotatable relative to the frame about a first axis of rotation that is offset from a central axis of the tool string and the second orienting feature (212) may be rotatable relative to the frame about a second axis of rotation that is offset from the central axis of the tool string.

Abstract: A device for centering a sensor assembly in a bore comprises a mandrel, a first support member and a second support member axially spaced apart along a longitudinal axis of the mandrel. The first and second support members adapted to move axially along the mandrel. A plurality of arm assemblies are spaced circumferentially apart around the longitudinal axis of the device and connected between the first and second support members. Each arm assembly comprises a first arm pivotally connected to the first support member by a first pivot joint having a first pivot axis, a second arm pivotally connected to the second support member by a second pivot joint having a second pivot axis, and the first and second arms pivotally connected together via a third pivot joint having a third pivot axis.

Abstract: Lateral wellbores intersecting a main wellbore are located with calipers on a tool. Each caliper includes first and second segments pinned to one another. Ends of each first segment distal from the pinned connections pivotingly attach to the tool. Ends of each second segment distal from the pinned connections couple with shuttles that slide axially along the tool. Biasing means urge the shuttles toward the pivoting connections of the first elongated segments to urge the pinned connections radially outward. When downhole and away from a lateral wellbore, walls of the main wellbore prevent the calipers from projecting into a radial maximum extension. When adjacent a lateral wellbore, calipers facing the lateral wellbore are extendable to a maximum radial extension. Distances between the pinned connections and tool are estimated with sensors; and openings to lateral wellbores are detectable based on the estimated distances. A steering arm optionally steers the tool downhole.

Abstract: System and methods for measuring properties within a subterranean well include a ring assembly. The ring assembly includes a structural ring sized with a ring inner diameter to circumscribe a tubular string and a ring outer diameter to fit within a bore of the subterranean well. A measurement tool is integrated with the structural ring. Wheels are spaced around an inner diameter surface of the structural ring.

Abstract: A stator bore gage comprises a detector assembly comprising a wheel configured to engage an inside surface and to transduce the varying surface diameters into electrical or optical signals representative of the condition of the inside surface as the detector traverses the inside surface.

Abstract: A sensor deployment system for positioning within a well casing is provided. The sensor deployment system includes a deployment shuttle comprising a first end, a second end, and an inner surface and an outer surface extending between the first end and the second end. The inner surface is configured to define a channel between the first end and the second end. A sleeve is coupled to the outer surface and configured to move relative to the well casing. A wire support is coupled to the inner surface and extending into the channel.

Abstract: A centralizer assembly is disclosed that allows for the assembly to be deployed in-situ. The centralizer assembly includes flexible members that can be extended into the well bore in situ by the initiation of a gas generating device. The centralizer assembly can support a large load carrying capability compared to a traditional bow spring with little or no installation drag. Additionally, larger displacements can be produced to centralize an extremely deviated casing.

Abstract: Generally, the present disclosure is directed to noise isolation tools that may be used to minimize or even eliminate the detrimental effects that rogue noise events may have on the noise data acquired by a noise logging tool during a noise logging operation. In one illustrative embodiment, a noise isolation tool that is adapted to be used in a noise logging operation is disclosed, the noise isolation tool including, among other things, a body and at least one noise suppression element mounted on the body, the at least one noise suppression element having a substantially circular disc shaped configuration that is adapted to extend radially across at least a portion of a width of an annular space between the body and an inside surface of a wellbore casing during the noise logging operation.

Abstract: A system and methodology facilitates extending the reach of coiled tubing during a well operation. The technique employs tubing which is deployed along wellbore. A plurality of extended reach devices is positioned along the tubing. Each extended reach device has at least one internal guide member oriented for extension into an interior of the tubing. The guide member engages and guides the coiled tubing during movement of the coiled tubing along the interior of the tubing, thus enabling an extended reach during a wellbore servicing application.

Abstract: A downhole system includes a downhole string insertable within a subterranean wellbore and a roller assembly coupled with the string. The roller assembly includes rollers mounted on lateral sides of the downhole string for reducing the resistance of deploying the string within the wellbore. The string is rotatable about its axis with respect to the roller assembly; bearing surfaces, or low torque surfaces, are included in the roller assembly to further reduce rotational friction so the string precisely positions itself to a designated orientation.

Abstract: A method for estimating a steady state response of a drill string in a borehole includes calculating a first displacement of the drill string in a frequency domain for a first excitation force frequency and a number of multiples of this frequency using an equation of motion of the drill string. The equation of motion has a static force component, an excitation force component, and a non-linear force component with respect to at least one of a deflection and a derivative of the deflection of the drill string. The method further includes: transforming the first displacement from the frequency domain into a time domain; calculating a non-linear force in the time domain; calculating a frequency domain coefficient derived from the calculated non-linear force in the time domain; and calculating a second displacement of the drill string in the frequency domain using the equation of motion and the frequency domain coefficient.

Abstract: Disclosed are devices that can be used for improving wireline cable performance during logging operations in a variety of boreholes. An embodiment includes a wireline standoff that may ameliorate the effects of wireline cable differential sticking, wireline cable key seating, and high cable drags by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. An embodiment includes a wireline standoff. The wireline standoff may comprise a pair of opposing assemblies. The opposing assemblies may each comprise a half shell, a cable insert configured to be disposed in the half shell, and external fins coupled to the half shell. The wireline standoff may further comprise one or more fasteners configured to couple the opposing assemblies to one another.

Abstract: A wireline standoff that may ameliorate the effects of wireline cable differential sticking, wireline cable key seating, and high cable drags by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. An embodiment includes a wireline standoff. The wireline standoff may comprise a pair of opposing assemblies. The opposing assemblies may each comprise a half shell, a cable insert configured to be disposed in the half shell, and external fins coupled to the half shell. The wireline standoff may further comprise one or more fasteners configured to couple the opposing assemblies to one another.

Abstract: A downhole tool for positioning in a wellbore comprises a tool main body, an electric motor disposed within the tool main body, the motor comprising a rotor rotatably attached to a stator, and a linear actuator assembly disposed within the motor for transforming a rotary output of the motor into a linear displacement.

Abstract: A well completion arrangement and method is for removing at least a portion of a line running in an annulus between a tubing and a casing in a well. The arrangement comprises at least two clamping means spaced apart in the longitudinal direction of the tubing and fixed thereto, the clamping means being configured for fixing the line with respect to tubing, a splitting means for releasing the line from the interval defined by at least an upper clamping means and a lower clamping means of the at least two clamping means, a line manipulator apparatus for activating said release of the line, and a line retrieval apparatus for displacing into the tubing the portion of the line from said interval, thereby removing the line from the annulus.

Abstract: Many wellbore service operations involve placing a line in the wellbore. The line may be used to transmit power to downhole tools, convey signals from downhole-measurement instruments, or both. A problem associated with such operations involves drag forces experienced by the line as process fluids flow through the well, particularly the interior of a tubular body such as casing. The drag forces may cause the line to fail. Magnetizing the line solves this problem. During deployment, the line will migrate and become attached to the casing. Drag forces are significantly reduced because the line is no longer surrounded by moving fluid.

Abstract: The method and apparatus involves the positioning of an arm of a wellbore tool, such that the tool moves bidirectionally in a wellbore. Techniques also include predicting and acting in advance on the mechanism of an oilfield tool inside a wellbore, enhancing bidirectional movement and operation of the tool inside a wellbore environment typically for logging the well. Such regulation or control between different sensing parts may control placement of the sensors with respect to the wellbore wall.

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 downhole line tool assembly (200) for use in a wellbore. The downhole line tool assembly (200) includes a downhole power unit (206) having a moveable shaft (240) and a line motivator tool (208) having a drive assembly (246, 247) adapted to contact a line (204) passing through the line motivator tool (200) in the wellbore. The drive assembly (246, 247) is operably associated with the moveable shaft (240) such that rotation of the moveable shaft (240) rotates the drive assembly (246, 247), thereby moving the line (204) relative to the line motivator tool (208).

Abstract: A hardfacing composition composed of an Fe—Cr alloy. The alloy is comprised of 80 wt % iron, about 2 wt % to about 20 wt % Cr, less than 1 wt % Si and less than 1 wt % C. The alloy's microstructure is at least 80 vol % martensite; and less than 20 vol % austenite.

Abstract: A downhole line tool assembly (200) for use in a wellbore. The downhole line tool assembly (200) includes a downhole power unit (206) having a moveable shaft (240) and a line motivator tool (208) having a drive assembly (246, 247) adapted to contact a line (204) passing through the line motivator tool (200) in the wellbore. The drive assembly (246, 247) is operably associated with the moveable shaft (240) such that rotation of the moveable shaft (240) rotates the drive assembly (246, 247), thereby moving the line (204) relative to the line motivator tool (208).

Abstract: A wireline tractor includes a displacement mechanism and at least one driving wheel positioned on the displacement mechanism so that the driving wheel is held in a biasing manner against a well wall. The displacement mechanism is rotatable or movable between a first position at which the driving wheel bears against the well wall on one side of the wireline tractor, and a second position at which the driving wheel bears against the well wall on the opposite side of the wireline tractor.

Abstract: A fluid saver tool for deploying in a wireline string comprises a main shaft having a concentric seat attached to a lower end of the main shaft and a variable-diameter piston assembly concentrically disposed on the main shaft and seated against the concentric seat. A concentric thrust bushing is installed on the main shaft in contact with an upper end of variable diameter piston opposite from the concentric seat. The tool enables the deployment operation to be accomplished with much less water, lower pump pressures and energy losses, and substantially less time required to complete the operation.

Abstract: A reelable slickline for use in downhole or subsea operations has a structural core comprising a plurality of non-metallic fibres in a matrix. The fibres represent in the region of 30 to 50% of the volume of the core.

Abstract: A centralizer for a well logging instrument includes a mandrel, a plurality of bow springs arranged circumferentially about the exterior surface of the mandrel and a biasing device in contact with one longitudinal end of each bow spring. The biasing device is configured to apply longitudinal biasing force to the longitudinal end of the respective bow spring.

Abstract: The present invention is a method and system for supplying grease to maintain a sealed well during deployment of line, in particular braided electrical wire. The subsea grease cartridge system includes a subsea assembly; first and second grease containers filled with grease; a pump; a switch; and a restoring device to replenish grease containers. The method of operating the grease cartridge system includes: attaching first and second grease containers to the subsea assembly; applying hydraulic pressure to the first grease container; pumping the grease of the first grease container to a grease head; switching hydraulic pressure from the first grease container to the second grease container instantaneously when the first grease container becomes unable to supply grease properly; and pumping the grease of the second grease container to the grease head. The method includes replenishing containers from cartridges and switching back and forth between the filled grease containers.

Abstract: An example method comprises securing a sleeve around at least a portion of a downhole tool, deploying the sleeve and the downhole tool into a wellbore penetrating a subterranean formation, and retrieving the sleeve and the downhole tool from the wellbore. The step of securing the sleeve around the at least portion of the downhole tool may be performed at the well site.

Abstract: The low friction wireline standoff improves wireline cable performance during borehole logging operations. The use of low friction wireline standoffs ameliorates the effects of wireline cable differential sticking, wireline cable key-seating, and high wireline cable drags, by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. The low friction wireline standoff comprises external wheels mounted on two finned half shells that clamp onto the wireline with precision cable inserts which are manufactured to fit a wide range of logging cables. The wheels reduce the cable drag down-hole resulting in lower surface logging tensions, aiding conveyance in deep and deviated wells.

Abstract: Disclosed are devices that can be used for improving wireline cable performance during logging operations in a variety of boreholes. An embodiment includes a wireline standoff that may ameliorate the effects of wireline cable differential sticking, wireline cable key seating, and high cable drags by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. An embodiment includes a wireline standoff. The wireline standoff may comprise a pair of opposing assemblies. The opposing assemblies may each comprise a half shell, a cable insert configured to be disposed in the half shell, and external fins coupled to the half shell. The wireline standoff may further comprise one or more fasteners configured to couple the opposing assemblies to one another.

Abstract: Tubular drill string component for drilling a hole with circulation of a drilling fluid around said component and in a direction going from a drill hole bottom to the surface. The component includes a first end including a female threading, a second end including a male threading, and a substantially tubular central zone. The component includes a communication tube arranged at least in the central zone and in contact with a bore of the central zone. A signal transmission cable is arranged in the tube. The communication tube includes a body formed from at least one metal strip arranged with an annular component. The body includes, in section along a plane passing through the axis of the tube, at least two axially elongated lengths, partially overlapping one another with an axial play selected to accommodate the maximum elastic deformation of the component under axial compressive and/or bending stress.

Abstract: A system and method for deploying one or more tools in a wellbore according to which a clamp is coupled to a flexible interconnect.

Abstract: A well servicing tool storage system for subsea well intervention is disclosed which provides a tool storage means as part of the intervention system and which has a plurality of tool storage arms deployed around the tool storage means. Each arm has a clamp capable of clamping a tool, and moving the clamped tool between a stored position near the perimeter of the tool storage means, and a deployed position in the centre of the tool storage means where the tool can be made up into a wireline connection.

Abstract: A borehole logging tool includes a housing oriented along a longitudinal axis, and a centralizer assembly that positions the housing substantially at the center of the borehole. In one example, the centralizer assembly includes a plurality of centralizer arms radially extendable outward from the longitudinal axis. The borehole logging tool further includes a scanning head that rotates a plurality of scanning sensors axially within the borehole about the longitudinal axis. The scanning head further includes a plurality of linkage arms coupled to the plurality of scanning sensors such that the scanning sensors are radially extendable outward from the longitudinal axis. The borehole logging tool further includes an extension assembly adapted to substantially concurrently control the radial extension of the centralizer arms and the plurality of sensors.

Abstract: A unique landing nipple has spaced control line connections and external control lines running from the surface to those connections. A hydraulic barrier valve, such as a ball valve, is run in to a predetermined landing nipple and latched in position where the control line connections are in the right locations to operate the valve. A landing nipple with a latching groove alone can be used with a wireline run barrier valve to latch it into position at the desired location. A shifting tool is used to operate the mechanically actuated valve. More than one valve can be positioned or used in the string at a time or the same valve can also be positioned at different landing nipples at different times to meet the production needs of the well operator.

Abstract: A centralizer for an instrument such as an in-place inclinometer is described. The centralizer has a clamp with an inner receptacle configured for coupling to the instrument housing, and a plurality of elongate fingers extending from the clamp that center the instrument in the casing. The fingers carry rollers that fit into grooves in the instrument casing. The fingers are arcuate and provide a spring-like contact force that causes the rollers to abut the instrument casing and stabilize the instrument.

Abstract: A method and apparatus for measuring formation properties comprising coiled tubing fitted with a bottom hole assembly, wherein said bottom hole assembly comprises means to measure formation fluid properties, means to transmit said formation fluid properties to a surface monitoring system, means to isolate a section of a wellbore, and means to control the flow of fluid entering said coiled tubing.

Abstract: The invention relates to a downhole device for incorporation into a downhole string and movement in a wellbore. The device comprises a body member, at least one roller arranged on the device to engage the inner surface of the wellbore and means to orient the device in the wellbore. The means to orient the device are provided on the or each roller. Preferably the means to orient the device comprise a projecting portion provided on the or each roller which projects radially outwardly from the body member. The projecting portion can be an eccentrically-shaped portion of the or each roller.

Abstract: An apparatus and method is provided for protecting control lines used with tool strings in a downhole environment. A control line protector assembly comprises a plurality of components formed into a unitary piece which includes a guard section having a first end section and a second end section, a slot on each of the first end section and the second end section, and a securing mechanism for coupling the guard section having the first end section and the second end section to the coupling. A control line protector assembly is formed using a metal stamping process.