Abstract: A diverting tool includes a ramp repositionable from a first position to a second position, a biasing member in operable communication with the ramp biasing the ramp toward the second position, and a tubular in operable communication with the ramp and the biasing member. The tubular prevents repositioning of the ramp when longitudinally overlapping with the ramp and allows repositioning of the ramp when not longitudinally overlapping with the ramp.

Abstract: A flexible milling assembly for milling an orifice through a well casing. One embodiment includes a drive yoke, and a plurality of straight and split yoke assemblies—all linked together and to a cutter head with universal blocks that enable the components to pivot relative to each other. A string of joint tubing connected to a prime mover on the surface is used to lower the milling assembly into a well and supply the driving torque. A split shoe coupled to a guide tube is positioned within the well casing where the orifice is to be milled. The milling assembly is guided through a curved passage within the split shoe to bring the cutter head into contact with the well casing. A protector assembly can be provided to enclose and protect the milling assembly when it is tripping into and out of the well casing.

Abstract: Multiple section mills are run in a single trip with an intervening mill preferably a watermelon mill to grind up any cuttings that get past the first mill in a direction toward the second mill below it. The blades of the second mill are held by the innermost tubular until the location of the initial cut is reached at which point the longer arms of the second mill can be extended and its body centralizes due to the flexibility of the connection between the mills.

Abstract: A system and method for enabling longitudinal and radial drilling in a wellbore is described. The system and method enable an operator to perforate the casing of a wellbore with an under-reamer at the end of a drill string and, without removing the drill string from the wellbore, initiate and complete lateral jetting of the wellbore into the surrounding formation. The system utilizes a perforation tool having a ball seat, which upon seating a drop ball in the ball seat enables the perforation tool to move from a closed position to an open position thereby allowing access to the formation using a jetting tool. Prior to seating the drop ball, an under-reaming operation may be performed using a hydraulic pressure activated under-reaming tool.

Abstract: A tool assembly and method for completing a well are provided. The tool is deployed on tubing string and includes a fluid treatment assembly with cup seals above and below the treatment ports. An equalization valve beneath the fracturing assembly can be opened or closed to control fluid passage between the coiled tubing and treatment zone to the wellbore below.

Abstract: A rotatable downhole cutting tool configured for enhanced drive consistency in low power circumstances. The tool is equipped with a hydraulic axial drive actuator suitable for use in wireline deployment. The actuator itself includes a reciprocating piston with a ball screw that threadably interfaces a ball nut for dampening the axial drive imparted by the piston. As such, even though hydraulically driven at generally well under about 10 horsepower, bounce in the axial drive is substantially eliminated. This is particularly advantageous where cutting is to be applied to downhole metal based obstructions.

Abstract: The present invention relates to apparatus and methods to stimulate subterranean production and injection wells, such as oil and gas wells, utilizing rocket propellants. Rapid production of high-pressure gas from controlled combustion of a propellant, during initial ignition and subsequent combustion, together with proper positioning of the energy source in relation to geologic formations, can be used to establish and maintain increased formation porosity and flow conditions with respect to the pay zone.

Abstract: A downhole propellant gas generator includes a propellant assembly that comprises a plurality of individual lengths of an energetic material packed in a selected configuration and at least one initiator. A method for creating a pressure pulse includes igniting an initiator, wherein the one or more initiators are packed with a plurality of individual lengths of an energetic material in a propellant assembly; igniting the plurality of individual lengths of the energetic material subsequent to the igniting of the one or more initiators. A method for stimulating a well includes disposing in the well a propellant gas generator having a propellant assembly that comprises a plurality of individual lengths of an energetic material, and at least one initiator packed among the plurality of individual lengths of the energetic material; igniting the at least one initiator, which in turn ignites the plurality of individual lengths of the energetic material.

Abstract: A well tool (2; 302a, 302b) and method for in situ introduction of a treatment means (151) into a region of an annulus (12), comprising: an anchoring body (38; 338); a perforation device (234) for making a hole (236) through a pipe structure (4); a storage chamber (142a, 142b) for the treatment means (151); a driving means (132, 144, 150) for the treatment means (151); and a flow-through connection device (192) for injection of the treatment means (151).

Abstract: A system that is usable with a well includes tubular body, at least one perforating charge that is disposed on the tubular body and at least one screen section that is disposed on the tubular body. The perforating charge(s) and the screen sectional(s) are adapted to be run downhole in a single trip into the well with the tubular body.

Abstract: A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the reamer at a location below the restriction; and urging the reamer back toward the restriction to remove the restriction.

Abstract: The techniques herein relate to a blade assembly of a blowout preventer for shearing a tubular of a wellbore penetrating a subterranean formation. The blowout preventer has a housing with a hole therethrough for receiving the tubular. The blade assembly includes a ram block movable between a non-engagement position and an engagement position about the tubular, a blade carried by the ram block for cuttingly engaging the tubular, a retractable guide carried by the ram block and slidably movable therealong, and a release mechanism for selectively releasing the guide to move between a guide position for guiding engagement with the tubular and a cutting position a distance behind the blade for permitting the blade to cuttingly engage the tubular.

Abstract: A tubing punch and setting tool (TPST), operating on a single run for improved well bore intervention. The tool includes a setting tool for connecting to and setting a reference tool in a tubing string, a punch tool for punching holes in the tubing string wall, and actuation means to trigger the sequencing of the setting tool and the punch tool. The tool can be run on wireline, e-line or coiled tubing and allows a reference tool to be run and set on the same trip as punching holes in the tubing string. The reference tool can be an anchor tool. With the distance known accurately between the anchor tool and the punched holes, a shortened retrofit gas lift straddle can be deployed.

Abstract: Apparatus and method for drilling drainholes into a subterranean formation around a well are provided. A tool body on tubing directs a mechanical cutter or jet bit to the casing. A hole is cut in casing and a rotary detent mechanism may be used to drill additional holes through casing and enable reliable alignment of a jet bit with the holes for drilling drainholes without removing apparatus from the well. This method significantly reduces operating time to drill multiple laterals at a given depth in a wellbore. Disposable nozzles in a guide channel or nozzles on the tool body may be used for drilling through casing.

Abstract: A tool assembly and method for completing a well are provided. The tool is deployed on tubing string and includes a fluid treatment assembly with cup seals above and below the treatment ports. An equalization valve beneath the fracturing assembly can be opened or closed to control fluid passage between the coiled tubing and treatment zone to the wellbore below.

Abstract: A technique is provided to facilitate fluid flow and pressure control in a well with an interventionless flow valve system. The valve system is coupled to a well component string deployed downhole in a wellbore. The valve system controls flow and pressure between an interior and exterior of the string and comprises a valve controlled by an activation device. The activation device is responsive to a unique pressure and time signal transmitted downhole.

Abstract: A method for forming and sealing a hole in a sidewall of a borehole may include conveying a bit and a sealer into the borehole using a carrier, forming a hole in the sidewall using the bit, and introducing a sealant from the sealer to the hole along a surface portion of the bit. An apparatus for forming and sealing a hole in a sidewall of a borehole includes a carrier conveyable into the borehole, a bit disposed on the carrier that forms the hole in a sidewall, and a sealer operable to introduce a sealant to the hole along a surface portion of the bit.

Abstract: The method of shearing drill collars used in the drilling of oil and gas wells, comprising providing an outer sleeve of a first material for carrying structural loads, providing a second material within the outer sleeve which is lower in shear strength and is greater in unit weight than the first material, and providing a hole in the second material for the circulation of fluids.

Abstract: An abrasive perforator tool with a bypass flow channel. The tool comprises a tubular body or housing with perforating nozzles in the sidewall. A sleeve assembly inside the central bore of the tool provides for sequential deployment of first and second sleeves. Prior to deployment of the sleeve assembly, pressurized fluid can be passed through the tool to operate other tools beneath the perforator in the bottom hole assembly. Deployment of the first sleeve diverts pressurized fluid through the nozzles for perforating. Deployment of the second sleeve redirects the pressurized flow through the outlet of the tool to resume operation of other tools below the perforator.

Abstract: The present disclosure discloses a firing assembly for detonating charges of a perforating gun. The firing assembly includes: one or more casings connected together to form a firing head containment body, the firing head containment body comprising a detonation chamber and actuation chamber; a detonator configured in the detonation chamber; a moveable actuator configured in the actuation chamber and operatively connected to the detonator, wherein the actuator is retained in a first position in the actuation chamber by a retention detent; a coupler operatively connected to the actuator opposite the detonator, wherein the coupler comprises a channel for communicating pressure through the coupler to the actuator that overcomes the retention detent and allows the actuator to move in the actuation chamber to a second position, wherein the detonator activates in dependence upon the actuator moving to the second position.

Abstract: A coiled tubing cutter assembly comprises a housing configured to be inserted in a length of coiled tubing. The housing forms a main bore and a first pathway through which cutting fluid can flow through the housing and be directed to impinge against an inner surface of the coiled tubing over which the housing is positioned so as to cut the coiled tubing. A sleeve is positioned in the main bore. The sleeve is movable between a first position and a second position within the main bore. The sleeve is configured so as to block the first pathway when in the first position and to allow cutting fluid to pass through the first pathway in the second position. A method of cutting coiled tubing is also disclosed.

Abstract: Apparatus and method for drilling drainholes into a subterranean formation around a well are provided. A tool body on tubing directs a mechanical cutter or jet bit to the casing. A hole is cut in casing and a rotary detent mechanism may be used to drill additional holes through casing and enable reliable alignment of a jet bit with the holes for drilling drainholes without removing apparatus from the well. This method significantly reduces operating time to drill multiple laterals at a given depth in a wellbore. Disposable nozzles in a guide channel or nozzles on the tool body may be used for drilling through casing.

Abstract: Methods for severing a tubular string having a cable in association therewith can include lowering a cutting apparatus into the tubular string and actuating the cutting apparatus to form a cut in the tubular string and sever the cable. Severing the cable in this manner can be performed through a single actuation of a single cutting apparatus, enabling at least a portion of the tubular string to be subsequently severed and retrieved, unimpeded by the cable.

Abstract: A perforating system and method for wellbore perforating. The system comprises a perforating string having a perforating gun with shaped charges, a communication module for receiving detonation signals, and a controller associated with each perforating gun. The module receives surface signals for gun detonation and wirelessly transmits the signals to selected guns via the associated controllers.

Abstract: A tubing cutter is run in with a bottom hole assembly that includes a seal and support within the tubing to be cut. A ported sub allows pressurized fluid pumped from the surface to enter the bottom hole assembly above the sealed support location and to be directed to set an anchor and to a fluid driven motor such as a progressive cavity motor that is in turn connected to the tubing cutter at the rotor of the progressive cavity motor. The rotation of the cutter with its blades extended cuts the tubular as the fluid exiting the stator goes to the lower end of the tubing being cut and can return to the surface through an annulus around the tubing to be cut. Other configurations such as cutting casing or cutting casing through tubing are also envisioned.

Abstract: A downhole tool having a cylindrical body, a sleeve having a contact portion disposed on a distal end, and a cutter having a radiused portion on a top surface operatively engageable with the contact portion. Also, a method of cutting drill pipe, the method including disposing a cutting tool in a wellbore around the drill pip and actuating a radiused cutter of the cutting tool, wherein the actuating includes radially extending the cutter into contact with the drill pipe. The method also includes applying a substantially constant force between the cutter and the drill pipe and rotating the cutting tool. Additionally, a cutter for a drill pipe cutting tool, the cutter including a work surface located at a first end of the cutter, an attachment point located at a second end of the cutter, and a radiused surface located between the work surface and the attachment point.

Abstract: Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a first blade on the first member having a projection projecting from a center of a blade body with point structure on the projection for puncturing the tubular and cutting surfaces on the projection for cutting the tubular; and cutting surfaces, as needed, on the blade body adjacent the projection for cutting the tubular.

Abstract: The present disclosure is directed to a cutting dart. The cutting dart comprises a dart body including a first pathway. The first pathway is configured to redirect cutting fluid flowing through a coiled tubing so that the cutting fluid flows radially to impinge against an inner surface of the coiled tubing. A seal is positioned around an outer circumference of the dart body. The present disclosure is also directed to an anchor dart. The anchor dart comprises a dart body and a swellable elastomer positioned around an outer circumference of the dart body. Methods of employing the cutting dart and anchor dart are also disclosed.

Abstract: A method of servicing a wellbore comprises running a toolstring into a wellbore to a first depth, actuating a controllably rotating sub-assembly of the toolstring to rotate, and activating a pressure activated bendable sub-assembly of the toolstring to bend, wherein actuating the controllably rotating sub-assembly to rotate and activating the pressure activate bendable sub-assembly are performed in any sequence or concurrently. The method also comprises running the toolstring into the wellbore beyond the first depth and stabbing the toolstring into a window in a wall of the wellbore to enter a lateral wellbore, wherein no whipstock is used to facilitate stabbing into the window. The method further includes running the toolstring into the lateral wellbore and performing a wellbore servicing operation in the lateral wellbore.

Abstract: An apparatus for setting an anchor in a borehole and milling a window in a side surface of the borehole in a single trip, comprising: a drill string; a mechanically-settable anchor (15) initially forming part of the drill string; a plug member position (16) below the anchor; and a milling assembly (8); wherein: when the drill string reaches a desired depth in the wellbore, the plug member may be activated from the surface, thus setting the plug member in position with respect to the wellbore; the anchor has an activation element which, when contacted in a predetermined manner, sets the anchor; and the plug member has an operation element adapted so that, when the anchor and plug member come into contact with one another in a predetermined orientation, the activation element is operated by the operation element, thus setting the anchor.

Abstract: An apparatus and method for removing a subsea structure wherein a housing defining a subsea structure receiving space and having a jetting system attached at or near the bottom of the housing is used to form an excavation around the subsea structure to the desired depth and a frame attached to or mounted in the housing carries a cutter assembly which is movable from a first position on the frame to a second position on the frame, the first position being on one side of the subsea structure, the second position being on the opposite side of the subsea structure.

Abstract: An abrasive slurry tool, the tool being attachable to a running string, the tool including a high-pressure assembly, the assembly including a nozzle assembly; and a low-pressure assembly in abrasive fluid communication with the high-pressure assembly, the low-pressure assembly comprising a low pressure holding tank configured to carry recharge abrasive fluid with the tool and method.

Abstract: The invention relates to a maintenance device for maintaining an elongated and in particular tubular hollow body (2), which is designed to conduct a fluid, having a sealing device (4) comprising a function unit (12), said sealing device being provided for sealing a working area (9) with respect to surroundings of the hollow body (2) and being movable in a direction along a surface of the hollow body (2), wherein the sealing device (4) comprising the function unit (12) can be moved at least partially in the longitudinal direction (B) of the hollow body (2), relative to the surface (7) of same, while preserving a tight seal. In addition, a method for forming a maintenance access on an elongated and in particular tubular hollow body is claimed.

Abstract: This patent application discloses method and apparatus to cut an extended slot connecting a well to a substantial cross section of a desired producing formation whereby material can flow freely between the formation and the wellbore and at least partially overcome the flow limitations of low permeability formations without the environmental issues associated with hydraulic fracturing. It is further disclosed that the connection between said slot and the formation may be further enhanced by explosive or combustive processes that rapidly generate gas pressure within the large surface area of the slot, thereby changing its characteristics and forcing open additional fractures into the cross section of formation exposed to the slot. The method may significantly increase the recoverable percentage of natural gas from low permeability deposits such as shale and coal.

Abstract: An apparatus and system for a single run process for well installations to cut or mill away a section of the casing of a well and then position an attached deflecting device to form radial boreholes or passages in a production formation that is intersected by the wellbore. This invention allows the lateral boreholes to be selectively oriented angularly upwardly or downwardly in relation to the casing space that has been formed or oriented in selectively radially spaced relation if desired.

Abstract: A device for perforating and fracturing a formation in a single trip includes shaped charges and a volume of a gas generator. When activated by detonation of the shaped charges, the gas generator forms a high-pressure gas, which includes steam, that expands to stress and fracture the formation. Suitable gas generating materials include hydrates and hydroxides. Other materials that can be employed with the gas generator include oxidizers and material such as metals that increase the available heat for the activation of the gas generator.

Abstract: A method and apparatus for perforating pipe from its interior, and in particular for perforating plastic well casing in situ. A linear actuator drives a claw-shaped bit. Linear motion of the cylinder is converted to a pivoting of the bit in a radial direction by a deflector. In a preferred embodiment, the linear actuator is a hydraulic piston-cylinder assembly and the deflector is an inclined surface. Operation of the actuator in a first direction drives the bit into the inclined deflection surface, which causes the bit to pivot and protract radially outward of the tool housing to perforate the wall of a pipe. Operation of the actuator in the opposite direction pulls the bit back into the tool housing so that the perforator tool can be easily moved with a well casing.

Abstract: A method for severing a tubular of a wellbore is provided. The method involves positioning a blowout preventer about a tubular, the blowout preventer having a plurality of rams slidably positionable therein and a plurality of blades carried by the rams for engaging the tubular. The method further involves piercing the tubular with a piercing point of at least one of the blades such that a portion of the tubular is dislodged therefrom, and raking through the tubular with a cutting surface of at least one of the blades.

Abstract: Techniques for severing a tubular of a wellbore penetrating a subterranean formation are provided. A blade is extendable by a ram of a blowout preventer positionable about the tubular. The blade includes a blade body having a front face on a side thereof facing the tubular. At least a portion of the front face has a vertical surface and at least a portion of the front face has an inclined surface. The vertical surface is perpendicular to a bottom surface of the blade body. The blade body includes a loading surface on an opposite side of the blade body to the front face. The loading surface is receivable by the ram. The blade also includes a cutting surface along at least a portion of the front face for engagement with the tubular, and a piercing point along the front face for piercing the tubular. The piercing point has a tip extending a distance from the cutting surface.

Abstract: A method and apparatus for down-hole cutting of pipe, such as casing, production tubing and other tubular goods. The apparatus has a central mandrel, retractable blades and opposing helical cam sleeves, and can be conveyed into a well and actuated via slickline or other non-conductive wireline. When the apparatus is positioned at a desired down-hole position relative to the pipe to be cut, the blades are extended radially outward to contact the pipe. Axial force applied to the opposing helical cam sleeves transfers torque to the blades which, in turn, rotate and cut the pipe. After the pipe is cut, the blades are retracted, and the apparatus can be retrieved from the well.

Abstract: The invention relates to techniques for severing a tubular. A blowout preventer is provided with a housing having a bore therethrough for receiving the tubular, an actuator positionable in the housing, and a plurality of cutting tools positionable in the housing and selectively movable into an actuated position with the actuator. Each of the cutting tools have a base supportable by the actuator and selectively movable thereby, and a cutting head supported by the base. The cutting head comprising a tip having a piecing point at an end thereof and at least one cutting surface. The piercing point pierces the tubular and the cutting surfaces taper away from the piercing point for cutting through the tubular whereby the cutting head passes through tubular.

Abstract: A method for milling a tubular cemented in a wellbore includes deploying a bottomhole assembly (BHA) into the wellbore through the tubular, the BHA comprising a window mill; and extending arms of the window mill and radially cutting through the tubular, thereby forming a window through the tubular, wherein a body portion of each window mill arm engages and stabilizes from an inner surface of the tubular after a blade portion of each window mill arm cuts through the tubular.

Abstract: A method of testing the through cut of a pipeline comprising at least the steps of: (a) transmitting an electromagnetic signal through the pipeline; (b) monitoring any reflected signal(s); and (c) interpreting the or each reflected signal to test for the through cut of the pipeline. In this way, a non-invasive electromagnetic signal can be passed through, along, across or otherwise within the pipeline, and any reflected signal(s) can be interpreted and analysed based on one or more characteristics of the received signal(s) to ascertain the change in the conductivity of the pipeline due to the cutting thereof, in particular when or whether the cutting of the pipeline is complete or has been completed such that there is a through cut.

Abstract: A methodology and apparatus for cutting shape(s) or profile(s) through well tubular(s), or for completely circumferentially severing through multiple tubulars, including all tubing, pipe, casing, liners, cement, other material encountered in tubular annuli. This rigless apparatus utilizes a computer-controlled, downhole robotic three-axis rotary mill to effectively generate a shape(s) or profile(s) through, or to completely sever in a 360 degree horizontal plane wells with multiple, nested strings of tubulars whether the tubulars are concentrically aligned or eccentrically aligned. This is useful for well abandonment and decommissioning where complete severance is necessitated and explosives are prohibited, or in situations requiring a precise window or other shape to be cut through a single tubular or plurality of tubulars.

Abstract: A tool assembly and method for completing a well are provided. The tool includes debris relief features that enable use in solids-laden environments, for example in the presence of sand. Forward and reverse circulation pathways to the isolated interval are present to allow clearing of debris from the wellbore annulus while the sealing device remains set against the wellbore.

Abstract: A tubular member for lining a wellbore, the tubular member comprising: an inner tubular member including a first end, an opposite end, an axial bore extending from the first end to the opposite end and an outer surface; an outer tubular including a base end and an outboard end, the outer tubular connected about the inner tubular adjacent its base end and a locating profile in the axial bore of the inner tubular.

Abstract: A perforating system and method for use in a wellbore. In operation, the perforating system is disposed in the wellbore and used to form perforations in the wellbore. Thereafter, the perforating system is used to perform a sequence of underbalance pulsations in the wellbore, wherein a first underbalance pulsation has a first underbalance signature and a second underbalance pulsation has a second underbalance signature that is different from the first underbalance signature such that perforating tunnel clean up can be optimized based upon wellbore conditions and without causing damage to the perforating tunnels.

Abstract: A method for perforating and fracturing a wellbore in a single trip may include installing one or more reservoir access subs on a liner at pre-determined intervals. The method may also include running the liner into the wellbore, securing the liner to the wellbore, and running a bottomhole assembly into the wellbore. The method may further include activating at least one of the reservoir access subs so as to allow fluid communication between the liner and the wellbore, and fracturing at least one interval proximate the activated reservoir access sub. The steps of running the bottomhole assembly into the wellbore, activating the reservoir access subs, and fracturing the interval may be performed in a single trip into the wellbore.

Abstract: Bottom hole assemblies for cutting windows in wellbore casing comprise a window mill, a first upper mill, a second upper mill, and a third upper mill. The first mill has an outer diameter that is smaller than the outer diameters of the window mill and the second and third upper mills. The first upper mill is disposed above the window mill at a distance measuring approximately twenty to thirty-seven percent of the distance measured from the window mill to the third upper mill. The second upper mill is disposed above the window mill at a distance measuring approximately fifty-five to seventy-five percent of the distance measured from the window mill to the third upper mill. The third upper mill is disposed above the window mill at a distance measuring approximately one-hundred twenty to one-hundred thirty percent of the length of a ramp of a whipstock for guiding the mills.

Abstract: A system and method for setting an anchor and/or whipstock attached to a downhole motor having a cutting tool attached to a tubular member, such as coiled tubing. In one aspect, the motor allows flow therethrough sufficient to actuate an upstream MWD or other position measuring tool, and an orienter if so equipped, and retain the orientation of the motor with the attached whipstock. An increased flow rate or pressure actuates the motor once the whipstock is set and rotation of the cutting tool or other equipment can begin.