Restricted Orifice For Initially Delaying Escape Of Restraining Fluid Patents (Class 175/297)
  • Patent number: 10313766
    Abstract: The disclosed apparatus may include (1) a Field-Replaceable Unit (FRU) that (A) is designed to mate with a backplane of a telecommunications system and (B) facilitates communication among computing devices within a network and (2) at least one helical ejector that (A) is coupled to the FRU, (B) fastens to a housing of the telecommunications system to enable the FRU to mate with the backplane of the telecommunications system, and (C) includes at least one spring that, when the helical ejector is fastened to the housing of the telecommunications system, applies a force on the FRU that pushes the FRU toward the backplane of the telecommunications system. Various other apparatuses, systems, and methods are also disclosed.
    Type: Grant
    Filed: July 1, 2017
    Date of Patent: June 4, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Jimmy Chun-Chuen Leung, Franklin D. Boyden
  • Patent number: 9845660
    Abstract: A pressure responsive downhole tool comprises a power piston pressure relief valve that is selectively activated and deactivated to allow pressure-related operations to be conducted. The pressure relief valve will not open until the power piston is activated, which also requires the operating element (ball valve, for example) to be opened, thereby avoided situations in which the ball valve is inadvertently placed in the Lock Open position.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: December 19, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Paul David Ringgenberg
  • Patent number: 9732574
    Abstract: An apparatus for coupling between opposing first and second portions of a downhole tool string. The apparatus includes a housing having a port therein, a shaft extending within at least a portion of the housing, and a flow restrictor reducing a flow area of the port. The housing and the shaft move axially relative to each other. The port fluidly connects a space external to the housing with an annulus defined between the housing and the shaft.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: August 15, 2017
    Assignee: Impact Selector International, Inc.
    Inventor: Jason Allen Hradecky
  • Patent number: 9670731
    Abstract: An adjustable bent housing assembly for a deviated direction drill string having 1.5° adjustment increments between an index sub housing and mandrel has variances of less than 0.02° at 0.25 nominal degree increments between 0° and 3.00° of drill direction deviation.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: June 6, 2017
    Inventors: Paul Donald Roberts, Timothy Edward LaGrange
  • Patent number: 9328567
    Abstract: A downhole assembly, including a downhole tool, a downhole force-creating device, and a shock damper. The shock damper includes a hollow housing including an annular shoulder near each end and extending radially inward from the housing. The damper also includes a mandrel located at least partially inside the housing to form an annulus between the mandrel and the housing, the mandrel including an annular shoulder near each end and extending radially outward from the mandrel. A spring is located in an annular cavity formed by the annulus and between both the housing shoulders and the mandrel shoulders. The mandrel is movable relative to the housing to an expanded position in one direction and to a compressed position in the other direction.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: May 3, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Robert W. Evans
  • Patent number: 9016404
    Abstract: The invention relates to a ram boring device for creating horizontal boreholes, having an impact piston which moves in an oscillatory manner within a casing of the ram boring device and of which the impact frequency or impact intensity can be varied by displacing the center position of the impact piston inside the casing.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: April 28, 2015
    Assignee: TRACTO-TECHNIK GmbH & Co. KG
    Inventor: Franz-Josef Püttmann
  • Patent number: 8899354
    Abstract: A drill bit is disclosed, comprising: a drill bit head having a cutting face with one or more fixed cutting elements; a flow passage extending through the drill bit head to the cutting face; a flow interrupter within the drill bit head and positioned to interrupt flow of fluid through the flow passage; and a power section connected to drive the flow interrupter and cause, in operation, variable flow of fluid through the flow passage. A method of drilling is also disclosed comprising: flowing fluid through a flow passage extending through a drill bit head to a cutting face of the drill bit head, the cutting face having one or more fixed cutting elements; and driving a flow interrupter within the drill bit head with a power section to interrupt the flow of fluid through the flow passage and cause variable flow of fluid through the flow passage.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: December 2, 2014
    Assignee: Northbasin Energy Services Inc.
    Inventors: Laurier E. Comeau, Geir Hareland, Jeff Janzen, John Kaminski
  • Publication number: 20140338978
    Abstract: A percussion adapter that is driven to generate a percussive axial motion on a wellbore structure. One percussion adapter includes a drive connection to mechanically convert rotational drive to axially directed percussive motion. Another percussion adapter employs a valve that creates back pressure causing axially directed percussive motion. A wellbore tubular connection is also disclosed that transitions torque to resist back off when left hand or right hand torque is applied.
    Type: Application
    Filed: April 15, 2014
    Publication date: November 20, 2014
    Applicant: NOV WORLDWIDE C.V.
    Inventor: Bradley R. COTE
  • Patent number: 8813844
    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.
    Type: Grant
    Filed: November 27, 2008
    Date of Patent: August 26, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Christopher Hopkins, Niina Nobuyoshi, Stephen Bonner
  • Patent number: 8783353
    Abstract: A downhole jarring tool includes a mandrel having a small diameter portion and a large diameter portion, a detent cylinder sealingly disposed around the mandrel forming an enclosure, a divider disposed in the enclosure between the mandrel and the detent cylinder, wherein the divider partitions the enclosure into a storage chamber and a metering chamber, and a metering system disposed around the mandrel. A method of applying an impact force using a downhole jarring tool includes moving a mandrel with respect to a detent cylinder by applying an axial force, positioning the mandrel such that a metering system disposed on the mandrel enters a reduced diameter portion of the detent cylinder, transmitting energy to an energy storing component disposed inside the detent cylinder, metering a fluid through the metering system, and accelerating the mandrel with respect to the detent cylinder.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: July 22, 2014
    Assignee: Smith International, Inc.
    Inventors: Vishal Saheta, Arley G. Lee
  • Patent number: 8733469
    Abstract: A downhole tool comprises a pulse generator that can generate longitudinal pulses in a drill string. A poppet is longitudinally moved in and out of an orifice in the pulse generator reducing the flow of drilling mud temporarily, generating a longitudinal pulse. The longitudinal pulse generator may be combined with a conventional transverse pulse generator to create a pulse generator capable of generating pulses in both transverse and longitudinal directions.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: May 27, 2014
    Assignee: Xtend Energy Services, Inc.
    Inventors: Christopher Konschuh, Laurier E. Comeau
  • Patent number: 8695696
    Abstract: A jar comprises an outer housing; an inner mandrel within the outer housing to define a fluid chamber; a valve disposed within the fluid chamber with a restriction surface facing, during setting, a cooperating restriction surface on the outer housing and a pressure surface facing the inner mandrel, the valve movable between a seated position and an unseated position; the cooperating restriction surface cooperating with the restriction surface to set the jar for a jar in a first direction; the pressure surface being exposed to fluid within the fluid chamber when the jar is set and pressuring up for a jar in the first direction; the pressure surface being indented to cause uneven radial movement, in a plane perpendicular to a jar axis, of the restriction surface towards the cooperating restriction surface when the jar is set and pressuring up for a jar in the first direction; and jarring surfaces.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: April 15, 2014
    Assignee: Lee Oilfield Services Ltd.
    Inventors: Michael Shoyhetman, David Budney, Craig Budney, Glenn Budney
  • Patent number: 8657007
    Abstract: A hydraulic jar for delivering impacts downhole. The jarring mechanism includes a cup-type piston that moves through a seal bore. The cup is deformable in response to fluid pressure so that it expands each time it moves through the seal bore to compensate for wear on the lip. Since only minimum interference is required between the piston and seal bore, less material may be used. This reduces the force required to reset the tool, which is particularly advantageous in horizontal wells. The seal bore may be slightly wider at the exit; the cup expands to this exit diameter, ensuring an interference fit as the cup travels back through the smaller diameter entry section. The entry end of the seal bore may include longitudinal grooves. This prevents the piston cup from rupturing by preventing a fluid seal around the lip until the most of cup is inside the seal bore.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: February 25, 2014
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Brock W. Watson, Roger L. Schultz
  • Patent number: 8651202
    Abstract: A percussion drilling assembly for boring into the earth is disclosed. The percussion drilling assembly includes a top sub, a casing coupled to the top sub, and a feed tube assembly disposed within the top sub and the casing. The feed tube assembly includes a non-rigid coupling having a throughbore and a tubular body disposed therein. The tubular body is translatable in the radial position and/or rotatable relative to a longitudinal centerline extending through the non-rigid coupling.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: February 18, 2014
    Assignee: Smith International, Inc.
    Inventors: Shantanu Swadi, Lance Underwood, Jack Marshall, Charles Dewey, Kevin Harrington
  • Patent number: 8561730
    Abstract: A retaining assembly for a cylindrical member and support sleeve in the bore of a component of a DTH. The cylindrical member and support sleeve may, for example, be a foot valve assembly for insertion into a counter bore in a bit. The cylindrical member has a cylindrical member rigidity and at least a portion of the support sleeve has a rigidity greater than the cylindrical member rigidity. A gap is provided between the sleeve and the component bore of the DTH. The cylindrical member deforms in the gap, resulting in the cylindrical member being fixedly sandwiched between the support sleeve and the component bore.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: October 22, 2013
    Assignee: Atlas Copco Secoroc LLC
    Inventors: Jing James Yao, Paul Campbell, William H. Dell, II, Dale R. Wolfer, Timothy J. Plunkett
  • Patent number: 8550155
    Abstract: A method and apparatus for delivering repetitive jarring impacts to a stuck object downhole. The jarring tool is deployed on coiled tubing or other tubular well conduit, and fluid pressure is used to cycle the jar without reciprocating the well conduit at the wellhead. The tool includes a hydraulic reset assembly. The hydraulic chamber is in fluid communication with the flow path through the tool. Thus, when the internal fluid pressure inside the tool exceeds the external pressure in the well, the fluid pressure drives the piston in the hydraulic chamber to urge the tool toward the contracted position. In this way, the reset assembly can overcome the tendency of fluid pressure to extend the tool. The reset assembly can be configured to balance or equalize the extension pressure, to prevent undesired cocking of the tool, or to overcome the extension pressure to contract the tool for recocking the jar mechanism.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: October 8, 2013
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Andrew M. Ferguson, Michael L. Connell
  • Patent number: 8544567
    Abstract: A drill bit comprises: a drill bit head having a cutting face with one or more fixed cutting elements; a flow passage extending through the drill bit head to the cutting face; a flow interrupter within the drill bit head and positioned to interrupt flow of fluid through the flow passage; and a power section connected to drive the flow interrupter and cause, in operation, variable flow of fluid through the flow passage. A method of drilling comprises: flowing fluid through a flow passage extending through a drill bit head to a cutting face of the drill bit head, the cutting face having one or more fixed cutting elements; and driving a flow interrupter within the drill bit head with a power section to interrupt the flow of fluid through the flow passage and cause variable flow of fluid through the flow passage.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: October 1, 2013
    Assignee: Northbasin Energy Services Inc.
    Inventors: Laurier E. Comeau, Geir Hareland, Jeff Janzen, John Kaminski
  • Publication number: 20130248253
    Abstract: A hydraulic jar having multiple high pressure chambers includes a jar body comprising an inner body telescopically engaged by an outer body. There is a first contact surface carried by the inner body, and a second contact surface carried by the outer body that engage when the jar body is moved to the jarring position. A plurality of axially spaced pressure chambers are spaced axially along the jar body, with each pressure chamber having a hydraulic delay section and a jarring section. A piston separates the pressure chamber. A hydraulic delay is in fluid communication with a high pressure section and a low pressure section of each pressure chamber and permits movement of the piston toward the second end at a first speed. A jarring valve permits movement of the piston toward the second end at a second speed that is greater than the first speed when in a japing section.
    Type: Application
    Filed: March 25, 2013
    Publication date: September 26, 2013
    Inventor: Orren Johnson
  • Patent number: 8505653
    Abstract: A double-acting compounder comprises: an outer housing; an inner mandrel disposed telescopically within the outer housing to define a fluid chamber; an equalizer, such as an equalizer piston, between the fluid chamber and an exterior of the outer housing for equalizing pressure; a movable seal assembly within the fluid chamber with a first end defining an end of the fluid chamber; the inner mandrel having an outer shoulder for moving the movable seal assembly with the inner mandrel when the inner mandrel moves in a first direction relative to the outer housing to compresses fluid within the fluid chamber; and the outer housing having an inner shoulder for preventing the movable seal assembly from moving with the inner mandrel when the inner mandrel moves in a second direction relative to the outer housing to compresses fluid within the fluid chamber.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: August 13, 2013
    Assignee: Lee Oilfield Service Ltd.
    Inventors: Michael Shoyhetman, David Budney, Craig Budney, Glenn Budney
  • Patent number: 8365818
    Abstract: A method and apparatus for delivering repetitive jarring impacts to a stuck object downhole. The jarring tool is deployed on coiled tubing or other tubular well conduit, and fluid pressure is used to cycle the jar without reciprocating the well conduit at the wellhead. A hydraulic reset assembly is included. The hydraulic chamber is in fluid communication with the flow path through the tool. Thus, when the internal fluid pressure inside the tool exceeds the external pressure in the well, the fluid pressure drives the piston in the hydraulic chamber to urge the tool toward the contracted position. In this way, the reset assembly can overcome the tendency of fluid pressure to extend the tool. The reset assembly can be configured to equalize the extension pressure, to prevent undesired cocking of the tool, or to overcome the extension pressure to contract the tool for recocking the jar mechanism.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: February 5, 2013
    Assignee: Thru Tubing Solutions, Inc.
    Inventors: Roger L. Schultz, Andrew M. Ferguson, Michael L. Connell
  • Patent number: 8230912
    Abstract: A bidirectional jarring tool that allows repetitive firing in one direction without firing the tool in the opposite direction. One of the tubular members provides up and down anvil surfaces, and the other member provides up and down hammer surfaces. Inner and outer tubular members define a hydraulic chamber with a restricted section that divides the chamber into an upper section and a lower section. Upper and lower pistons, each with a valved flow channel, reciprocate through the restricted section to produce up and down jarring impacts. When the restricted section is disposed between the upper and lower pistons, the tool is in a neutral position and can be jarred repetitively in either direction.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: July 31, 2012
    Assignee: Thru Tubing Solutions, Inc.
    Inventor: Michael L. Connell
  • Patent number: 8205690
    Abstract: A double action locking jar is operable to provide a jarring force in an upward or downward direction. A pair of pressure pistons form a pressure chamber in which a Belleville spring stack is located. A metering orifice in one of the pistons serves to provide a delay mechanism for release of a mandrel within the housing. Two collets are located within the housing for mechanically releasing the mandrel when a tension or compression force is applied to the mandrel. The jar may be mechanically actuated only by allowing the pistons to freely move within the housing without hydraulic resistance.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: June 26, 2012
    Inventor: Robert W. Evans
  • Patent number: 8151910
    Abstract: A bidirectional drilling jar, capable of repeated unidirectional firing, including a sliding assembly that is disposed in a sliding relation to the interior of a barrel assembly. A portion of the inner diameter of the barrel assembly forms a restricted barrel segment. The restriction intermediate an upper chamber and a lower chamber. A metering system comprising an upper flange a meter valve, and a lower flange. The meter valve slideably disposed on the sliding assembly between the upper and lower flanges. The metering system travels between the upper chamber and the lower chamber providing limited, controlled flow of the fluid contained therein when passing through the restriction in order to pressurize the system and produce a jarring stroke. Alternatively, the metering system comprises an upper flange, a meter ring, a meter valve, and a lower flange. The meter valve and meter ring are slideably disposed on the sliding assembly intermediate the upper and lower flanges.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: April 10, 2012
    Inventor: Jerry L. Swinford
  • Patent number: 8127864
    Abstract: A down-the-hole assembly includes a housing assembly having a head end and a bit end. The housing assembly further includes an inlet joint having an inlet channel defined therein, a sealing portion positioned toward the bit end relative to the inlet joint, and an outlet portion positioned toward the bit end relative to the sealing portion. A hammer assembly including a piston has a piston channel defined therein that includes an inlet in fluid communication with the inlet channel and an outlet in fluid communication with the housing assembly.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: March 6, 2012
    Assignee: Longyear TM, Inc.
    Inventors: George Ibrahim, Christopher L. Drenth
  • Patent number: 8011427
    Abstract: A double-acting jar is disclosed comprising: an outer housing; an inner mandrel at least partially disposed telescopically within the outer housing to define a fluid chamber between the inner mandrel and the outer housing, the fluid chamber containing fluid and being sealed; a valve disposed within the fluid chamber on one of the inner mandrel and the outer housing; the valve having a downhole portion that is movable between a downhole seated position in which the valve seats against the one of the inner mandrel and the outer housing and an unseated position, the downhole portion having a downhole restriction surface; the valve having an uphole portion that is movable between an uphole seated position in which the valve seats against the one of the inner mandrel and the outer housing and an unseated position, the uphole portion having an uphole restriction surface; the other of the outer housing and the inner mandrel having a cooperating restriction surface that cooperates with the downhole restriction surfac
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: September 6, 2011
    Inventors: Michael Shoyhetman, David Budney, Craig Budney, Glenn Budney
  • Patent number: 8011455
    Abstract: A percussive assisted rotary drill includes a top sub for connection with a drill pipe. The drill pipe imparts torque to the drill and also supplies motive fluid to the drill. The drill includes a shank adapter to facilitate affixing a rotary drill bit to the drill. The motive fluid is divided between a bit flow which flows through the bit to clear debris at the bottom of the drill, and an actuator flow. An actuator, which may be in the form of a reciprocating piston, moves within the drill under the influence of the actuator flow to impart cyclical blows to the shank adapter. At least a portion of the actuator flow portion of the motive fluid is exhausted through the top end of the drill.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: September 6, 2011
    Assignee: Atlas Copco Secoroc LLC
    Inventors: Leland H. Lyon, Warren T. Lay
  • Publication number: 20110073373
    Abstract: The invention relates to an arrangement designed to be inserted in a cavity (19) in a front part (14) of a rock drilling machine with a shank adapter (16). The arrangement comprises a cartridge (1) with a flushing head (2) and a guide (3) coaxially arranged to create a longitudinal channel (5) designed as a passage for the shank adapter (16).
    Type: Application
    Filed: June 2, 2009
    Publication date: March 31, 2011
    Inventors: Jörgen Rodert, Peter Birath
  • Patent number: 7814995
    Abstract: A hydraulic jar for a drilling assembly is disclosed. In some embodiments, the hydraulic jar includes a tubular housing, a mandrel disposed in the housing, an annulus between the mandrel and the housing, and a pressure relief mechanism disposed in the annulus. The pressure relief mechanism generally divides the annulus into first and second portions. The pressure relief mechanism includes first and second annular members in engagement with one another when the pressure in the second annulus portion is less than a predetermined value and a fluid flow path between the first and second annulus portions. The fluid flow path has a first size when the pressure in the second annulus portion is less than the predetermined value, and a second size that is larger than the first size when the pressure in the second annulus portion becomes equal to or greater than the predetermined value.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: October 19, 2010
    Assignee: National Oilwell Varco, L.P.
    Inventors: Jeffery Ronald Clausen, Jonathan Ryan Prill, John Mitchel Cobb
  • Patent number: 7753116
    Abstract: A double-acting jar comprises an inner mandrel and an outer housing. The inner mandrel is disposed telescopically within the outer housing to define a fluid chamber in between. There is an uphole restriction and a downhole restriction spaced from one another within the fluid chamber. An uphole valve is disposed within the fluid chamber, the uphole valve having a first seating surface engageable with an uphole facing sealing shoulder in the fluid chamber. There is a downhole valve disposed within the fluid chamber, the downhole valve having a second seating surface engageable with a downhole facing sealing shoulder in the fluid chamber.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: July 13, 2010
    Inventors: David Budney, Craig Budney, Glenn Budney
  • Patent number: 7748478
    Abstract: A percussion drilling assembly for drilling through earthen formations and forming a borehole. In an embodiment, the percussion drilling assembly comprises a fluid conduit including a tubular body having a first end, a second end, a through passage extending between the first end and the second end, and an inlet port in fluid communication with the through passage. In addition, the percussion drilling assembly comprises an adjustable choke at least partially disposed in the through passage and including a first bypass port. The adjustable choke is adapted to decrease the volumetric flow rate of a compressed fluid through the first bypass port.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: July 6, 2010
    Assignee: Smith International, Inc.
    Inventor: Shantanu Swadi
  • Patent number: 7712552
    Abstract: A water hammer using a drive rod is provided.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: May 11, 2010
    Inventor: Suk Shin In
  • Patent number: 7665550
    Abstract: The present invention discloses a collapsible drilling assembly having field-replaceable cutter or stabilizer blades (214) and method of using and installing new stabilizer blades while at a job location. The drilling assembly is deployed upon a distal end of a drillstring, expanded to a gauge size, and used as an underreamer or alternatively a stabilizer. The drilling assembly operates between retracted and extended positions through the increase in pressure of drilling fluid flowing therethrough.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: February 23, 2010
    Inventor: Allen Kent Rives
  • Publication number: 20090308661
    Abstract: A bit assembly is for a percussive drill that includes a casing with an interior chamber and includes a bit connectable with the casing and having a longitudinal bore and an axis through the bore. The bore has a retainer portion with one or more generally. conical inner surfaces extending circumferentially about and facing generally toward the axis. A generally cylindrical valve has a longitudinal passage with an inlet fluidly connectable with the casing chamber and an outlet fluidly connectable with the bit central bore and an axis through the passage. An engagement portion with at least one generally conical outer surface extends circumferentially about and faces generally away from the valve axis. The valve engagement portion is disposable within the bit bore retainer portion such that the valve conical outer surface is disposed within and against the bit conical inner surface to retain the valve coupled with the bit.
    Type: Application
    Filed: April 27, 2006
    Publication date: December 17, 2009
    Inventors: Dale R. Wolfer, Timothy J. Plunkett, Leland H. Lyon
  • Patent number: 7617886
    Abstract: In one aspect of the present invention, a drilling assembly has a string of downhole tools connected to a drill bit with a bit body intermediate a shank and a working face. The drill bit is connected to the string of tools at the shank. A continuous fluid passageway is formed within the bit body and the string of tools. A valve mechanism disposed within the fluid passageway is adapted to substantially cyclically build-up and release pressure within the fluid passageway such that a pressure build-up results in radial expansion of at least a portion of the fluid passageway and wherein a pressure release results in a contraction of the portion of the fluid passageway. The expansion and contraction of the portion of the fluid passageway varies a weight loaded to the drill bit.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: November 17, 2009
    Inventor: David R. Hall
  • Patent number: 7461706
    Abstract: A drilling apparatus includes a cutting structure defined by a percussive action cutter and at least one other cutter. The percussive action cutter is adapted to be urged in a drilling direction by hydraulic pressure force, while the other cutter is urged in a drilling direction by mechanical force.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: December 9, 2008
    Assignee: Andergauge Limited
    Inventor: Alan Martyn Eddison
  • Publication number: 20080236894
    Abstract: A hydraulic jar for a drilling assembly is disclosed. In some embodiments, the hydraulic jar includes a tubular housing, a mandrel disposed in the housing, an annulus between the mandrel and the housing, and a pressure relief mechanism disposed in the annulus. The pressure relief mechanism generally divides the annulus into first and second portions. The pressure relief mechanism includes first and second annular members in engagement with one another when the pressure in the second annulus portion is less than a predetermined value and a fluid flow path between the first and second annulus portions. The fluid flow path has a first size when the pressure in the second annulus portion is less than the predetermined value, and a second size that is larger than the first size when the pressure in the second annulus portion becomes equal to or greater than the predetermined value.
    Type: Application
    Filed: March 19, 2008
    Publication date: October 2, 2008
    Applicant: NATIONAL OILWELL VARCO, L.P.
    Inventors: Jeffery Ronald Clausen, Jonathan Ryan Prill, John Mitchel Cobb
  • Patent number: 7419015
    Abstract: An axial bearing includes a first piston and a second piston. Axial contact surfaces between the pistons are arranged in the same pressure space. The same pressure fluid fed to the axial bearing acts on the contact surfaces and on working pressure surfaces of the pistons. A rock drilling machine is also provided with such an axial bearing.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: September 2, 2008
    Assignee: Sandvik Mining and Construction Oy
    Inventors: Timo Muuttonen, Esa Rantala
  • Patent number: 7392857
    Abstract: In one aspect of the invention a drill bit comprises an axis of rotation a body and a working face. The body comprises a fluid passageway with a first seat and houses a jack element substantially coaxial with the axis. A stop element is disposed within the passageway and has a first near-sealing surface. The jack element has a shaft intermediate an indenting end and a valve portion. The valve portion has a second near-sealing surface disposed adjacent the first near-sealing surface and a second seat disposed adjacent the first seat. As a formation strongly resists the jack element, the distance between the sealing surfaces narrows. This causes an increase in fluid pressure within the passageway and forces the indenting end down into the formation. This movement of the jack element relieves the pressure build up such that the formation pushes the jack element back, thereby oscillating the jack element.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: July 1, 2008
    Inventors: David R. Hall, Scott Dahlgren
  • Patent number: 7377338
    Abstract: A pressure fluid actuated downhole percussion tool includes a reciprocating piston hammer with differential transverse pressure surfaces cooperable with a cylinder housing, a guide sleeve and a bit carried exhaust tube to form opposed pressure fluid chambers to which pressure fluid may be conducted to deliver repeated impact blows to a bit having circumferentially spaced bosses and replaceable cutting inserts. The bit is drivenly connected to the tool by plural drive pins supported in circumferentially spaced grooves in the bit shank and in a removable sub supported by the tool housing. Improved earth penetration performance is realized utilizing a claw bit with a pressure fluid actuated percussion tool providing rotation as well as selective deliverance of impact blows through the bit.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: May 27, 2008
    Inventor: Grey Bassinger
  • Patent number: 7347287
    Abstract: A jar for use in a downhole environment comprises an hydraulic timing device which allows pressure to be controllably increased to a desired level and, on firing, a near-instantaneous release of that pressure, and which allows for selective bi-directional firing of the jar.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 25, 2008
    Inventor: Roger Chancey
  • Patent number: 7290604
    Abstract: A downhole tool is provided that creates balancing forces that allow a tool such as ajar to continue to function when intrusion of gas into the fluid chamber of the jar occurs to cause gas pressure in the jar to exceed hydrostatic pressure. The excess pressure is balanced by forming an area acted on by the gas pressure equal to the cross-sectional area of the mandrel, such that the forces on the mandrel are equal and opposite.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: November 6, 2007
    Inventor: Robert W. Evans
  • Patent number: 7219726
    Abstract: An apparatus for use in a wellbore comprises a housing having a longitudinal axis and a mechanism having one or more impact elements adapted to move along the longitudinal axis in an oscillating manner to impart a back and forth force on the housing to vibrate the housing. In another arrangement, an apparatus for use in a wellbore comprises a housing and at least one impact element rotatably mounted in the housing. The at least one impact element is rotatable to oscillate back and forth to impart a vibration force to the housing.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: May 22, 2007
    Assignee: Schlumberger Technology Corp.
    Inventors: Shunfeng Zheng, Benjamin P. Jeffryes, Hubertus V. Thomeer, Lawrence J. Leising
  • Patent number: 7073610
    Abstract: A downhole tool for generating a longitudinal mechanical load. In one embodiment, a downhole hammer is disclosed which is activated by applying a load on the hammer and supplying pressurizing fluid to the hammer. The hammer includes a shuttle valve and piston that are moveable between first and further position, seal faces of the shuttle valve and piston being released when the valve and the piston are in their respective further positions, to allow fluid flow through the tool. When the seal is releasing, the piston impacts a remainder of the tool to generate mechanical load. The mechanical load is cyclical by repeated movements of the shuttle valve and piston.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: July 11, 2006
    Assignee: Rotech Holdings Limited
    Inventor: Hector Fillipus Alexander Van Drentham Susman
  • Patent number: 7066263
    Abstract: A tension multiplier jar apparatus which multiplies the tension by a multiple factor using a compressible energizing fluid acting on differential areas to provide greater over-pull to jar objects in the well. There is first included an overall assembly which includes a lowermost anvil and metering sub attached on its upper end to a hammer and compression sub which is secured on its upper end to a multiplier sub which is secured on its upper end to a fourth upper spline sub. In additional embodiments there is provided a spring such as Belleville springs or coiled springs to replace the energizing fluid as well as downward firing tool that can be activated without any external attachment to the wellbore. There is further provided a mechanism for cocking and firing the tool in place of the metering system.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: June 27, 2006
    Inventor: David E. Mouton
  • Patent number: 7017681
    Abstract: The proposed invention relates to wellbore technologies and is intended to produce action on productive rock. Device for hydrodynamic action on wall of a well comprising a casing jointed with the pipe conduit directly or via a roller support and inside of which the mechanism for cavitating of flow of a liquid, mechanism for directing and splitting of the flow and mechanism for interrupting of the discharge jets are sequentially placed. The mechanism for cavitating of flow of a liquid is made in form of an auto-oscillating system. And specifically it can be made in a form of a ball with its diameter ratio to inner diameter of the casing of 0.9–0.98 and a limiter of axial motion; or a ball with its diameter ratio to inner diameter of the casing less than 0.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: March 28, 2006
    Assignee: Whirlwind International B.V.
    Inventors: Vladimir Ivanovich Ivannikov, Ivan Vladimirovich Ivannikov
  • Patent number: 6953098
    Abstract: A hydraulic accumulator for use in a drill string having a fluid passage for supply of fluid to a hydraulic drill string tool is provided. The accumulator comprises a body provided with connecting means for connecting the accumulator to the drill string and an expansion chamber in fluid communication the fluid passage when the accumulator is connected to the drill string by the connecting means. The expansion chamber is expandable between a first volume and a second volume which is larger than the first volume. Further, the expansion chamber is provided with means for moving the expansion chamber from the first to the second volume upon a fluid pressure increase in the fluid passage and for moving the expansion chamber from the second to the first volume upon a pressure decrease in the fluid passage.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: October 11, 2005
    Assignee: Shell Oil Company
    Inventors: Petrus Cornelis Kriesels, Djurre Hans Zijsling
  • Patent number: 6907927
    Abstract: An apparatus for use in a wellbore comprises a housing having a longitudinal axis and a mechanism having one or more impact elements adapted to move along the longitudinal axis in an oscillating manner to impart a back and forth force on the housing to vibrate the housing. In another arrangement, an apparatus for use in a wellbore comprises a housing and at least one impact element rotatably mounted in the housing. The at least one impact element is rotatable to oscillate back and forth to impart a vibration force to the housing.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: June 21, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Shunfeng Zheng, Benjamin P. Jeffryes, Hubertus V. Thomeer, Lawrence J. Leising
  • Patent number: 6729419
    Abstract: A drilling jar comprising a mandrel with a shoulder extending radially outward. The shoulder defines at least one openable and closeable orifice therethrough. An outer housing is slidably disposed about the mandrel to define an upper chamber above the shoulder and a lower chamber below the shoulder. The jar also comprises a magnetorestriction material that responds to a predetermined pressure in the upper chamber to open at least one orifice in the shoulder to allow rapid pressure communication between the upper and lower chambers.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: May 4, 2004
    Assignee: Smith International, Inc.
    Inventor: Arley Gene Lee
  • Patent number: 6725932
    Abstract: The down hole jar tool is a tool used to apply jarring forces to objects that may be obstructing the path of a down hole, or above-ground operation that requires a repetitive jarring action to dislodge or remove such objects. The tool is used by providing a linear input to a mandrel portion that draws back against a compressible unit of predetermined resistance until a releasing means abruptly releases the mandrel portion. The mandrel portion then rapidly moves in the direction of the linear input until it encounters a stationary anvil, which produces the desired jarring action. This tool may also be combined with accelerators and/or valves, as well as other tools, to create a more substantial jarring impact.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 27, 2004
    Inventors: Mark A. Taylor, Jeff L. Taylor
  • Patent number: 6655460
    Abstract: The present invention generally provides a downhole tool with an improved means of transmitting data to and from the tool through the use of wired pipe capable of transmitting a signal and/or power between the surface of the well and any components in a drill string. In one aspect, a downhole tool includes a body, and a mandrel disposed in the body and movable in relation to the body. A conducive wire runs the length of the body and permits signals and/or power to be transmitted though the body as the tool changes its length.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: December 2, 2003
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Thomas F. Bailey, Michael Nero, Timothy L. Wilson