Abstract: A method for modifying an element on a section of wellbore tubular includes positioning a wellbore intervention tool at a first location on the tubular, operating a penetration device to remove the element and create an orifice on the section of wellbore tubular, and operating an installation device to install a replacement element in the orifice.

Abstract: A system includes a bottom hole assembly and a core sampling tool. The bottom hole assembly includes a housing and a drill bit coupled to the housing. The core sampling tool includes a first compartment positioned within the housing, the first compartment including a motor; a second compartment positioned within the housing and radially spaced apart from the first compartment, the second compartment including a coring bit; and a flexible drilling shaft extending between and coupled to the motor and the coring bit.

Abstract: A swivel includes a male segment, a female segment, and a lock pin. The male segment can mate with the female segment, and the lock pin can pass through the female segment and engage with the male segment to prevent relative axial movement of the male segment and the female segment while allowing relative rotational movement of the male segment and the female segment. The male segment includes a first conductive ring configured to couple to a first wire. The female segment includes a second conductive ring configured to couple to a second wire. Contact between the first and second conductive rings establishes an electrical connection between the first and second wires.

Abstract: A technique facilitates drilling operations by combining a conductor with a conductor sharing offset shoe system. The conductor sharing offset shoe system protects against collision of boreholes by properly positioning and/or orienting a drill string during drilling of boreholes through the conductor. The conductor sharing offset shoe system may comprise a bullnose disposed at a lower end of the shoe system and an upper guide member disposed at an upper end of the shoe system with a guide opening sized to receive the drill string therethrough. A guide tubing extends from the guide opening into the bullnose to guide the drill string during drilling of a borehole. The guide tubing is sized to preserve sufficient space for accommodating movement of the drill string through the conductor sharing offset shoe system externally of the guide tubing during drilling of another borehole.

Abstract: An installation apparatus for installing a liner in a subterranean formation includes a housing having an internally arranged flexible member operatively connected to a bore-forming device at one end and to a control module at another end. An opening is arranged in a housing wall through which the flexible member and device may be passed. A liner is arranged around at least a portion of the flexible member between the opening and a first support member. The first support member is arranged to move inside the housing in a direction towards the opening, and a second support member is configured to movably support at least a portion of the flexible member in the region between the control module and the first support member. A method of installing a liner in an inverted drainhole is disclosed.

Abstract: Extendable elements of downhole tools are provided having an extension direction component perpendicular to a tool axis, wherein a force is applied to the extendable element when in operation. The extendable elements comprise a first cross-section that includes the extension direction component, a first surface configured to receive a first force component of the force, the first force component substantially perpendicular to the first surface and a second surface configured to transfer at least a portion of the first force component of the force to a body of the downhole tool. The second surface and the extension direction component perpendicular to the tool axis draw a first angle that is between 0° and 90°.

Abstract: A support device may include an upper portion that has a first width and a base portion that has a second width. The support device may be sized to be positioned within a tubing string. The support device may be removable from the tubing string. The support device may include a vertical support that connects the upper portion to the base portion. The vertical support may have a third width and defining a fluid flow path between the vertical support and an inner surface of the tubing string.

Abstract: An electric setting tool powered through a cable or wire line for setting bridge plugs or other settable downhole tools and which may be used in conjunction with a select fire perforating gun. The electric setting tool is adapted to receive DC power and set a tool in the range of 20 to 60 seconds while operating at under 2.0 amps. The composite tool may be comprised of multiple perf guns subs, the electric setting tool, and bridge plug or other settable tool.

Abstract: A downhole sampling tool includes a cam configured to rotate about a central axis. Two or more pistons engage a cam track such that rotation of the cam causes the pistons to reciprocate between first and second piston positions. Corresponding fluid flow lines are opened and closed when corresponding ones of the plurality of pistons reciprocate between the first and second piston positions.

Abstract: A coring bit assembly for conveyance via wireline or drillstring in a wellbore extending into a subterranean formation. The coring bit assembly includes a coring shaft and a thrust ring coupled to an end of the coring shaft. A static sleeve is disposed inside the coring shaft and having a flange coupled to the thrust ring to space the static sleeve from the coring shaft to form a drilling fluid passageway between the coring shaft and the static sleeve. An axial fluid pump is disposed on the coring shaft to engage with the static sleeve to drive drilling fluid through the drilling fluid passageway formation.

Abstract: A downhole coring tool conveyable within a borehole extending into a subterranean formation, wherein the downhole coring tool comprises a housing, a hollow coring bit extendable from the housing, a first motor operable to rotate the coring bit, and a second motor operable to extend the coring bit into the subterranean formation through a sidewall of the borehole in a direction not substantially parallel to a longitudinal axis of the borehole proximate the downhole coring tool. A static sleeve disposed in but rotationally independent of the coring bit receives a portion of a core sample of the formation resulting from extension of the coring bit into the formation. The static sleeve comprises a protrusion extending radially inward toward the core sample sufficiently to mark the core sample.

Abstract: A sidewall coring apparatus for obtaining a plurality of formation cores from a sidewall of a wellbore includes a core catching tube configured to be sealed downhole and to store at least one of the formation cores therein. The core catching tubes includes a first end that may be sealed by a first sealing mechanism, and an opposite end that may be sealed by a second sealing mechanism. The core catching tube also includes a fluid evacuation port that may be sealed downhole.

Abstract: Apparatus and the methods for deploying a sensor in the formation down a borehole. The apparatus comprises a downhole drilling system which is connected at a first end to the surface and is connected at a second end to a flexible drilling string downhole in the borehole. At least a portion of the flexible drilling string is locatable in a lateral hole of the borehole, and at least one downhole sensor is connectable to the portion of the drilling string that is locatable in the lateral hole.

Abstract: A WD sidewall coring tool includes: an outer cylinder set (34); a retrieving mechanism (35); a drilling sealer mechanism (36); a power mechanism (37); and a coring mechanism (38); wherein the outer cylinder set (34) includes a stabilizer (1), a limiting connector (22), and a turning connector (23) connected in sequence; wherein the retrieving mechanism (35) includes a retrieving cylinder (39), a retrieving head set (40), and a steel rope (33); wherein the drilling sealer mechanism (36) includes a connecting rod (28), a universal joint (24), a plug sleeve (29), and a sealing plug (30); wherein the power mechanism (37) includes a flat thrust bearing (17), a screw stator (18), a screw rotor (19), a limiting piston (20), and a first spring (21); wherein the coring mechanism (38) includes a coring cylinder (25), a core grabber (26), and a coring bit (27).

Abstract: An off-axis “cam” drilling tool is provided. The off-axis “cam” drilling tool includes an outer tubing having a throughbore therein, an inner tubing having a throughbore therein, the inner tubing being configured to be inserted within the throughbore of the outer tubing. An annulus is defined between the inner tubing and the throughbore of the outer tubing through which a medium may pass. A cam section can be configured on a portion of the exterior surface of the outer tubing. The outer tubing can be coupled to drill rods of a drill string. The cam section has an axis that is offset to an axis of the outer tubing, and the tool is configured to rotate about cam section axis to lift the drill rods coupled to the outer tubing above a centerline of a drill bore to beneficially orient the drill bit drilling the drill bore.

Abstract: A drilling assembly is tripped in a cased hole to make more open hole. The assembly features retracted scrapers and a closed circulation sub so that the drilling can commence with string pressure delivered to bit nozzles due to the circulation sub being in a closed position. When drilling is done and the bit is to be removed, an object lands on a seat on a sleeve that acts as a piston to break scraper retainers for casing scraping deployment and to open the circulation port. A bypass opens around the seated ball when the sleeve shifts to allow flow around the seated ball for circulation while scraping. Drilling and casing scraping are accomplished in a single trip.

Abstract: A coring tool having a coring mechanism for cutting cores from a borehole sidewall. The coring mechanism comprises a motor having a coring bit to cut 1.5 inch diameter, 2.5 inch long cores. Support plates fixed to the housing comprise guide slots having a longer leg and a shorter leg. Leading pins and follower pins extend from the motor into the guide slots. When the leading and follower pins are driven along the guide slots, the motor is rotated and then pushed into the formation. Drive plates positioned between the housing and the support plates comprise slots and pivot about a pin. The leading pins further extend into the drive plate slots. A hydraulic cylinder pivots the drive plates, pushing the pins along the guide slots to rotate the motor to a radial position and then urge the motor towards the formation.

Abstract: A system and method for drilling a wellbore along a desired well path is disclosed. The system and method employed a bearing housing which may be connected into a bottom hole assembly to facilitate drilling of deviated wellbore sections. The bearing housing has an internal bore with an axis that can be positioned to form a non-zero angle with the central or longitudinal axis of the bearing housing. The internal bore is designed to rotatably receive a drill bit shaft such that a drill bit is oriented at a desired angle with respect to the bearing housing. Alternatively, the internal bore may be positioned in a sleeve which is received in the bearing housing.

Abstract: A wireline drilling system for the hydrocarbon exploration and production industry incorporating a drilling cuttings removal system which acts to remove and store cuttings displaced by a drill bit during drilling operations. The cuttings removal system may employ a screw member having a tapered lower portion and a narrow upper portion to transport drilling cuttings to a cuttings basket and distribute the cuttings therein. Embodiments of the invention include an integral tractor to progress the wireline drilling system and provide weight-on-bit, as well as assist in retrieval of the wireline drilling system if the tool should become stuck.

Abstract: A lateral drilling system includes a device for drilling a first bore hole, preferably vertical or substantially vertical, and including a tool for boring a second bore hole in a direction transverse, preferably normal or substantially normal, to the first bore hole. The vertical boring tool may be any vertical boring device. A casing for the first bore hole may be used. The tool for boring the second bore hole includes a pipe launching section and a pipe receiving section. There is also a removable rack for holding a supply of pipe segments, each segment having a lead end of reduced diameter for fitting into a tail end of a preceding pipe segment, so that the segments form a conduit which may be used to treat surrounding ground. The tool includes a frame for holding the pipe receiving section, pipe launching section and pipe launching mechanism. The pipe launching mechanism includes a pushing arm and a power source to push each pipe segment one by one into the ground.

Abstract: A method for operating a coring tool includes moving a handling piston of a coring tool from a first position to a second position with respect to the coring tool where the handling piston moving through a coring bit to the second position. The method also includes measuring the distance of the movement of the handling piston between the first position and the second position to determine a core length, comparing the measured distance with a predetermined threshold, and operating a coring bit of the coring tool to obtain a core sample in response to determining that the measured distance is less than the predetermined threshold.

Abstract: A down-the-hole drill hammer is provided that includes a housing, a solid core piston mounted within the housing, a seal located between the solid core piston and the housing, and a backhead configured to exhaust working fluid volumes about a proximal end of the DHD hammer. The backhead includes a check valve assembly having a plug seal that can be moved to a closed seal position by gravity. A DHD hammer having a segmented chuck assembly is also provided. The segmented chuck assembly includes a plurality of chuck segments forming a cylindrical chuck assembly.

Abstract: An apparatus and system that permits radial passages and lateral passages to be jetted into surrounding subsurface formation from existing or new wells. The system employs a casing cutting component that positionable by an anchored indexing device downhole to permit the formation of accurately positioned openings in the well casing. The system employs a passage jetting component employing extreme high jet fluid pressures and a method that allows for the downhole manipulation of the components so that the radial and lateral passages are achieved by minimum pulling work on casing, tubing or other components. The system is fully controllable and reduces dramatically the margins of error and failure that are inherent of the present day systems used for radial drilling.

Abstract: An apparatus for conveyance via wireline or drillstring in a wellbore extending into a subterranean formation, the apparatus comprising a coring bit assembly, a first motor operatively coupled to the coring bit assembly via a gear box to rotationally drive the coring bit assembly, and a second motor to drive the coring bit assembly into the formation while the coring bit assembly is rotated by the first motor, wherein the coring bit assembly comprises a feature to permit the coring bit assembly to be broken when the coring bit assembly becomes stuck in the formation.

Abstract: Various embodiments of methods and systems for wireless power and/or data communications transmissions to a sensor subassembly above a mud motor in a bottom hole assembly are disclosed. Power and/or data are supplied by rotary modulator and power generation system positioned above the mud motor. Wires may connect to an annular coil. Power and/or communications are transmitted through the annular coil to an inductively coupled second, mandrel coil that is attached to the rotor. By leveraging resonantly tuned circuits and impedance matching techniques for the coils, power and/or data can be transmitted efficiently from one coil to the other despite relative movement and misalignment of the two coils.

Abstract: A system and methodology facilitates use of a diverter latch assembly in cooperation with a lateral wellbore. The diverter latch assembly comprises an upper latch assembly coupled with a lower latch assembly via a swivel. The upper latch assembly also comprises a releasable latch positioned to engage a tieback receptacle located in the well. The swivel and the releasable latch are designed to enable rotation of the releasable latch relative to a tubing of the lower latch assembly during release of the diverter latch assembly from the tieback receptacle. The rotational release system helps provide controlled release and withdrawal of the diverter latch assembly while reducing risk of damage to the diverter latch assembly or other downhole components.

Abstract: A sidewall coring apparatus for obtaining a plurality of formation cores from a sidewall of a wellbore includes a core catching tube configured to be sealed downhole and to store the plurality of formation cores therein. The core catching tubes includes an inner sleeve and an outer sleeve concentric with the inner sleeve. The inner and outer sleeves include corresponding slots configured to align in response to relative movement of the inner and outer sleeves, and when aligned the slots of the inner and outer sleeves allow evacuation of fluid from the core catching tube as each of the plurality of formation cores is inserted into the core catching tube.

Abstract: A down-the-hole drill hammer having a housing, a backhead and a tubular sliding check valve assembly that includes a distal end, a threaded male proximal end, a supply inlet and an exhaust port. The exhaust port communicates between an interior of the backhead and an exterior of the backhead. The tubular sliding check valve assembly includes a distributor, a sliding valve, and a biasing member. The distributor has a central opening extending through the distributor, an aperture extending through the distributor, and an exhaust gallery. The sliding valve is slidable along the central opening. The biasing member biases the sliding valve to a closed position.

Abstract: A debris removal tool has a lower end pickup hose into which debris laden fluid is pulled when there is circulation through the debris removal tool from the surface. An anchor near the open end of the hose stabilizes the lower end near a recess or groove from which debris is to be removed. Once the anchor is set the hose can be extended or retracted as well as rotated on its axis to pick up debris. A camera can be located in or near the hose opening to be able to see where the debris is located and for confirmation that the debris is being removed and that the debris has fully been removed.

Abstract: A drilling system for drilling and completing a lateral borehole from a main borehole comprises a liner unit for storing one or more prefabricated liners for installation into the lateral borehole; and a drilling unit operable to drill the lateral borehole into the formation surrounding the main borehole and to install the prefabricated liner in the lateral borehole after drilling. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the system in the main borehole at a location of interest; operating the drilling unit to drill a lateral borehole from the main borehole; completing the lateral borehole by deploying the liner from the liner unit into the lateral borehole.

Abstract: A horizontal drilling device according to the invention includes a linear drive, a rotary drive that can be displaced by means of the linear drive, a drill rod assembly and a rod assembly receiver, the drill rod assembly being hollow and the rod assembly receiver being designed as a receiving mandrel, which allows the drill rod assembly to be placed on the receiving mandrel

Abstract: A sidewall coring apparatus for obtaining a plurality of formation cores from a sidewall of a wellbore includes a core catching tube configured to be sealed downhole and to store the plurality of formation cores therein. The core catching tubes includes an inner sleeve and an outer sleeve concentric with the inner sleeve. The inner and outer sleeves include corresponding slots configured to align in response to relative movement of the inner and outer sleeves, and when aligned the slots of the inner and outer sleeves allow evacuation of fluid from the core catching tube as each of the plurality of formation cores is inserted into the core catching tube.

Abstract: An apparatus and method for improving control over the milling force applied to a milling bit that is turned through a rotary drive to form a hole in a wellbore casing. A bit-weighting sub is applied between the tubing used to lower the rotary drive's motor into the wellbore and the rotary drive itself, the sub serving to take the weight of the tubing off the rotary drive when the motor lands in operative connection with the drive, and further serving to apply a known milling force to the drive (and thus to the bit) independent of the weight of the tubing. In a preferred form the sub includes a spring that is compressed against the drive when the tubing and motor are landed.

Abstract: A tool and method for drilling a secondary hole (window) from a pre-determined position within a well bore into the adjacent rock or formation. The invention includes an internal (relative to the production tubing) primary deflection wedge transitioning into an externally attached (relative to the production tubing) conical device that aids in the exit from the production tubing through the production casing, where a significant standoff exists between the smaller production tubing (completion) and the larger ID production casing. The primary deflection wedge serves as a directional guide to exit the production tubing. The conical device provides a way to transition and support a milling device to exit the adjacent casing at a desired angle without having the milling device move off the preferred course. This two-part assembly is called a tandem wedge kick off assembly.

Abstract: A horizontal drilling device according to the invention includes a linear drive, a rotary drive that can be displaced by means of the linear drive, a drill rod assembly and a rod assembly receiver, the drill rod assembly being hollow and the rod assembly receiver being designed as a receiving mandrel, which allows the drill rod assembly to be placed on the receiving mandrel

Abstract: An apparatus comprising a sidewall coring tool configured to obtain a plurality of sidewall formation cores from a sidewall of a wellbore extending into a subterranean formation, wherein the sidewall coring tool comprises a core catching tube configured to store the plurality of sidewall formation cores therein, wherein the core catching tube comprises a fluid port configured to allow evacuation of fluid from the core catching tube as each of the plurality of sidewall formation cores is introduced therein, and wherein the core catching tube, including the fluid port, is configured to be sealed downhole without removing the sidewall coring tool from the wellbore.

Abstract: An apparatus and method for penetrating earth strata surrounding a wellbore including a nozzle assembly, a flexible tubing connected to the nozzle assembly, and a means to position the nozzle assembly downhole in a substantially horizontal direction into earthen strata, such that the nozzle assembly is connected to one end of the flexible tubing. Embodiments can provide horizontal jetting into the earth's strata from both cased and uncased wells utilizing a rotating, swirling, pulsing or cavitating nozzles which can keep a relatively cuttings free downhole environment.

Abstract: A coring tool having a coring mechanism for cutting cores from a borehole sidewall. The coring mechanism comprises a motor having a coring bit to cut 1.5 inch diameter, 2.5 inch long cores. Support plates fixed to the housing comprise guide slots having a longer leg and a shorter leg. Leading pins and follower pins extend from the motor into the guide slots. When the leading and follower pins are driven along the guide slots, the motor is rotated and then pushed into the formation. Drive plates positioned between the housing and the support plates comprise slots and pivot about a pin. The leading pins further extend into the drive plate slots. A hydraulic cylinder pivots the drive plates, pushing the pins along the guide slots to rotate the motor to a radial position and then urge the motor towards the formation.

Abstract: A method for constructing a multilateral well includes drilling a main well, drilling a first lateral well from the main well, installing a production reentry deflection tool in the main well, proximate the first lateral, the first production reentry deflection tool having a first inner diameter, drilling a second lateral well from the main well and above the first lateral well, and installing a second production reentry deflection tool in the main well, proximate the second lateral, the second production reentry deflection tool having a second inner diameter. The first inner diameter is smaller than the second inner diameter.

Abstract: An oilfield downhole cutting tool comprises a tool body that comprises a non-cutting stabilizing section. The cutting tool further comprises a plurality of cutters coupled to the tool body forward of the non-cutting stabilizing section, wherein a maximum cutting diameter defined by the cutters is less than 1.1 times a diameter defined by the non-cutting stabilizing section. The cutting tool further comprises a cutting rate limiting component coupled to the tool body.

Abstract: A coring apparatus that includes a housing that is selectively pivotable in a downhole tool, a rotatable coring bit, a gear drive rotatively coupled to the housing, and a key member configured to engage an inner surface of the gear drive and an outer surface of the coring bit and configured to maintain a rotational relationship between the coring bit and the gear drive. A pinion is rotatively coupled to the housing and configured to engage an outer surface of the gear drive, and a motor is affixed to the housing and operatively coupled to the pinion. The gear drive, the key member, the pinion and the motor are configured to pivot in unison with the housing.

Abstract: A method and apparatus for completing a lateral channel in a subterranean formation using a flexible hose with a waterjet that may be directed down a well casing and into a waterjet guide. The waterjet guide has a diverter assembly configured to receive and divert the flexible hose in a shortened radius. The diverter assembly includes an inlet curvature and a pivot curvature, where the pivot curvature pivots between stowed and deployed configurations in response to forces provided through a mandrel assembly communicably coupled thereto.

Abstract: A drilling system for drilling a lateral borehole from a main borehole comprises a tubular conduit through which a fluid can be pumped, and a drilling assembly connected to the tubular conduit so as to receive fluid pumped therethrough. The drilling assembly comprises a power conversion unit, through which the fluid flows and which operates to provide a downhole power output; a drilling unit including a drilling apparatus powered by the output of the power conversion unit and operable to drill a lateral borehole into the formation surrounding the main borehole, and a liner unit for storing one or more liners for installation into the lateral borehole; and an anchor unit operable to anchor the drilling assembly in the main borehole when the drilling unit operates to drill the lateral borehole.

Abstract: A central slant hub tool is provided which is capable of receiving tubing or a tool such as a drill from the surface and directing the tube or tool laterally outward using an exit line slant surface or directing the tube or tool downward to an area below the tool. In this way, the tool acts as a hub to communicate with both lateral branches and lower zones of the main casing. Fracture window tools may be installed in the lateral and lower branches to selectively open the bores for drilling, testing and/or production or may be sealed by a bridge plug or the like when not in use.

Abstract: A drilling system for drilling and completing a lateral borehole from a main borehole comprises a liner unit for storing one or more prefabricated liners for installation into the lateral borehole; and a drilling unit operable to drill the lateral borehole into the formation surrounding the main borehole and to install the prefabricated liner in the lateral borehole after drilling. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the system in the main borehole at a location of interest; operating the drilling unit to drill a lateral borehole from the main borehole; completing the lateral borehole by deploying the liner from the liner unit into the lateral borehole.

Abstract: A method and apparatus for completing a lateral channel in a subterranean formation using a flexible hose with a waterjet that may be directed down a well casing and into a waterjet guide. The waterjet guide has a diverter assembly configured to receive and divert the flexible hose in a shortened radius. The diverter assembly includes an inlet curvature and a pivot curvature, where the pivot curvature pivots between stowed and deployed configurations in response to forces provided through a mandrel assembly communicably coupled thereto.

Abstract: The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. The estimated permeability is useful in determining whether carbon dioxide can be effectively sequestered in the formation below or at the depth of measurement without significant leakage through the cement annulus.

Abstract: The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in hydraulic contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. By drilling into the cement and making additional measurements of the change of pressure in the probe over time, a radial profile of the cement permeability can be generated.

Abstract: A device useful for conducting lateral or transverse excavating operations within a wellbore comprising a rotating drill bit with jet nozzles on a flexible arm. The arm can retract within the housing of the device during deployment within the wellbore, and can be extended from within the housing in order to conduct excavation operations. A fluid pressure source for providing ultra high pressure to the jet nozzles can be included with the device within the wellbore. The device includes a launch mechanism that supports the arm during the extended position and a positioning gear to aid during the extension and retraction phases of operation of the device.

Abstract: An oil tool forms holes or perforations which extend horizontally away from the borehole and into the formation for recovering additional oil and gas from the formation. The tool provides a downhole tool capable of drilling horizontally into a formation and further capable of operating in a relatively small well bore, such as those having a diameter of less than six inches. In addition, the tool does not tend to spiral or otherwise deviate from horizontal during drilling operations. The tool of the present invention includes a drill capable of drilling or tunneling through the formation, a magazine or carrier which contains a plurality of hollow joints or segments, a hydraulic pump and a mechanism for assembling and disassembling the segments. Once in place, the assembly mechanism removably attaches a segment from the magazine to the drill.