Unlike Helical Surfaces On Relatively Wobbling Rotating Member And Encompassing Cylinder (e.g., Moineau Type) Patents (Class 418/48)
  • Patent number: 10895256
    Abstract: A progressing cavity pump or a positive displacement motor includes an external member having three or more lobes and an internal member extending through the external member and having one less lobe than the external member. One of the internal member and the external member rotates with respect to the other. The curvature of a profile of each of the internal member and external member is finite at all points. A ratio of a lobe volume of the external member to a valley volume of the external member enclosed between a minor external member diameter and a major external member diameter is between 0.9 and 1.2. A lobe height of the external member is related to a ratio of a minor internal member diameter to one less than the number of internal member lobes.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: January 19, 2021
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Anton Kolyshkin, Maxim Pushkarev
  • Patent number: 10837444
    Abstract: Rotary positive displacement machines based on trochoidal geometry, that comprise a helical rotor that undergoes planetary motion within a helical stator are described. The rotor can have a hypotrochoidal cross-section, with the corresponding stator cavity profile being the outer envelope of the rotor as it undergoes planetary motion, or the stator cavity can have an epitrochoidal cross-section with the corresponding rotor profile being the inner envelope of the trochoid as it undergoes planetary motion. In some embodiments, the geometry is offset in a manner that provides structural and/or operational advantages in the rotary machine.
    Type: Grant
    Filed: February 29, 2020
    Date of Patent: November 17, 2020
    Assignee: Rotoliptic Technologies Incorporated
    Inventors: Greg John Montie, Bryan Allen Callaway
  • Patent number: 10774832
    Abstract: A stator assembly for a progressing cavity pump is provided. The stator assembly includes a number of stator laminates having a planar body defining a primary, inner passage and a number of outer passages, the outer passages disposed effectively adjacent the inner passage whereby the inner passage is at least partially defined by a band, wherein the band is outwardly flexible. The stator laminates are coupled to each other in a stack wherein the stator laminate body inner passages define a helical passage. The helical passage is a flexible helical passage.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: September 15, 2020
    Assignee: Penn United Technologies, Inc.
    Inventors: Jesse Benedict Rothschild, Dwight Patrick Jones, Mark Phillip Noah
  • Patent number: 10767646
    Abstract: A pump housing for an eccentric screw pump, with a longitudinal axis and a hollow space constituted running axially between a drive-side opening and a pump-side opening, wherein the pump-side opening is enclosed by a main housing body and a lid fastened removably thereto, wherein the main housing body includes a ring segment-shaped axial guiding surface lying opposite the lid.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 8, 2020
    Assignee: NETZSCH Pumpen & Systeme GmbH
    Inventors: Mikael Tekneyan, Philipp Nübl, Magdalena Brüning
  • Patent number: 10760570
    Abstract: A stator-rotor system of an eccentric screw pump including a rotor with a rotor screw and a stator with an internal thread. The stator includes a support element and an elastomer part. The support element surrounds the elastomer part in sections around the whole circumference. The stator-rotor system includes a mechanism for adjusting the stator, having two adjustment elements arranged on the stator-rotor system, which are distance-variable relative to one another. In a first working position the two adjustment elements have a first distance from one another and in a second working position, a second distance. The cross-section and the length of the elastomer part of the stator in the second working position are changed compared to the cross-section and the length of the elastomer part in the first working position.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: September 1, 2020
    Assignee: NETZSCH Pumpen & Systeme GmbH
    Inventors: Stefan Voit, Christian Kneidl, Hisham Kamal, Christian Bindig, Mikael Tekneyan
  • Patent number: 10648337
    Abstract: The invention relates to an eccentric screw pump, comprising at least one stator (1) composed of an elastic material and a rotor (2) that can be rotated in the stator (1), the stator (1) being surrounded by a stator casing (3) at least in some regions. The stator casing (3) consists of at least two casing segments (19) as a longitudinally divided casing and forms a stator clamping device, by means of which the stator (2) can be clamped against the rotor (1) in the radial direction.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: May 12, 2020
    Assignee: SEEPEX GMBH
    Inventors: Dirk Overmeier, Marcel Griesdorn, Stefan Goethel
  • Patent number: 10590929
    Abstract: A stator assembly for a progressing cavity pump is provided. The stator assembly includes a number of stator laminates having a planar body defining a primary, inner passage and a number of outer passages, the outer passages disposed effectively adjacent the inner passage whereby the inner passage is at least partially defined by a band, wherein the band is outwardly flexible. The stator laminates are coupled to each other in a stack wherein the stator laminate body inner passages define a helical passage. The helical passage is a flexible helical passage.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: March 17, 2020
    Assignee: Penn United Technologies, Inc.
    Inventors: Jesse Benedict Rothschild, Dwight Patrick Jones
  • Patent number: 10527037
    Abstract: A mud motor stator or a pump comprising of a tubular outer portion; a number of lobes extending radially inwardly from the tubular outer portion, at least one of which comprises a skeletal structure and method for producing a mud motor stator or a pump comprising of placing material and bonding the material together in a pattern dictated by the design shape of the stator or pump.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 7, 2020
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Christoph Wangenheim, Witali Huber, Frederik Goeing
  • Patent number: 10435981
    Abstract: A sealing arrangement having inboard and outboard dynamic seals in a housing separated by a barrier fluid and having a sealed relationship with a relatively movable bearing-guided shaft. A bearing chamber having bearing lubricant exposed to the inboard dynamic seal. The inboard dynamic seal is a hydrodynamic seal having a hydrodynamic pumping action in response to relative rotation between the shaft and the inboard dynamic seal. The hydrodynamic pumping action forcing a film of the bearing lubricant between the inboard dynamic seal and the shaft. The hydrodynamic pumping-related leakage of the inboard dynamic seal being returned to the bearing chamber in which the shaft guidance bearings are located.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: October 8, 2019
    Assignee: KALSI ENGINEERING INC.
    Inventor: Aaron Paul Richie
  • Patent number: 10309395
    Abstract: A stator and a method of manufacturing at least a portion of a progressive cavity motor or pump include disposing a cylindrical shell within a cylindrical housing, disposing a stator mold within the cylindrical shell, disposing an elastomeric material between the stator mold and the cylindrical shell, removing the stator mold from within the elastomeric material, thereby forming an elastomeric material layer having a stator profile within the cylindrical shell, and removing the cylindrical shell from within the cylindrical housing, thereby forming a cartridge having the elastomeric material layer disposed within the cylindrical shell.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: June 4, 2019
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Julien Ramier, Peter Cariveau, Pierre Lauric Dubesset
  • Patent number: 10265055
    Abstract: An improved flexible endoscopic instrument to precisely and efficiently obtains samples of flat polyps and multiple polyps from a patient by debriding one or more polyps and retrieving the debrided polyps without having to alternate between using a separate cutting tool and a separate sample retrieving tool and may be used with an endoscope. In one aspect, the cutting tool is coupled to a flexible torque coil or torque rope that is configured to transfer rotational energy from a powered actuator through the length of the endoscope onto the cutting tool.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: April 23, 2019
    Assignee: INTERSCOPE, INC.
    Inventors: Cosme Furlong, Michael W. Marcoux, Richard Stephen Wisdom, William R Rebh, Jr., Evan Costa, Stephen C. Evans
  • Patent number: 10245075
    Abstract: In a nondestructive means of ectopic pregnancy management, a baby is delivered with the gestational sac intact and then submerged in an incubator containing ventilating fluid; the baby is placed in an absorbable transfer capsule and transcervically transferred to the uterine cavity; the capsule dissolves after a period of time to leave the gestational sac abutted to the endometrium so the baby can reattach. To maintain the baby's life support, the means includes fluidic ventilators and ventilation catheters to perfuse the gestational sac with ventilating fluid during such times as delivery, incubation, transfer, and reimplantation. Advantageously, the transfer capsule protects the baby during transfer and serves as a convenient vehicle for placing devices such as the ventilation catheter in the uterus along with the baby.
    Type: Grant
    Filed: March 15, 2014
    Date of Patent: April 2, 2019
    Inventor: Eurica Califorrniaa
  • Patent number: 10240599
    Abstract: A uniaxial eccentric screw pump includes: a casing; a stator having one end portion thereof connected to the casing and having an inner peripheral surface which is formed into a female threaded shaped; a rotor configured to be insertable into the stator and formed of a shaft body having a male threaded shape; and an end stud connected to the other end portion of the stator. The stator is configured to be expandable and shrinkable in a radial direction.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: March 26, 2019
    Assignee: HEISHIN LTD.
    Inventor: Kei Tanaka
  • Patent number: 10233923
    Abstract: Provided are a sliding member for pumps in which generation of a wear substance is quickly and accurately grasped even if the wear substance is generated when the sliding member slides while being in contact with another member, and a pump operation state detection system using the sliding member. The pump operation state detection system includes a uniaxial eccentric screw pump, a detection device capable of detecting metal powder in a fluid discharged from the uniaxial eccentric screw pump, and a determination device. In the uniaxial eccentric screw pump, a stator is arranged so as to be exposed to a fluid conveyance path through which the fluid flows. The stator is configured to slide while being in contact with a rotor along with operation of the uniaxial eccentric screw pump. The stator is made of a resin or a rubber and contains 10-30% of metal powder by weight ratio.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: March 19, 2019
    Assignee: HEISHIN TECHNO WERKE LTD.
    Inventors: Masahiro Tonami, Yuko Katayama
  • Patent number: 10174973
    Abstract: A system for cryocooling an optical sensor on a satellite to a temperature below 200K with minimal vibration comprising a miniature conical rotary screw compressor comprising an inner element configured to only rotate around a first stationary axis and an outer element configured to only rotate around a second stationary axis so that both elements revolve with minimal vibration; with at least one of a) a length of at least one of the inner element and the outer element is between 10 mm and 100 mm; b) a diameter of at least one of the inner element and the outer element is between 2 mm and 45 mm; c) a compression ratio of the rotary screw compressor is between 1:2 and 1:20; and d) a shaft speed of the conical rotary screw compressor is between 1001 and 20000 revolutions per minute.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: January 8, 2019
    Assignee: VERT ROTORS UK LIMITED
    Inventors: Oleg Dmitriev, Evgenii Tabota
  • Patent number: 10167868
    Abstract: A screw compressor includes compressor bodies, a motor disposed in a side of the compressor bodies, a gear box coupled to the compressor bodies and transmitting the drive force of the motor to a screw rotor, and a tubular coupling casing coupling the gear box and the motor and having horizontal axis. The coupling casing has a work hole in the horizontal direction. The work hole is used for maintaining a coupling accommodated in the coupling casing. The coupling casing has a rib extending in the up-down direction. It is thus possible to avoid reduction in the rigidity of the coupling casing with no cost increase, and to improve maintainability.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: January 1, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Yosuke Fukushima, Kazuki Tsugihashi
  • Patent number: 10160003
    Abstract: The purpose is to provide a discharge system that can reduce an adhered amount of fluid to a coupler on a discharging device side to be smaller than an adhered amount of the fluid to a coupler on a refilling device side during a refilling operation of the fluid to the discharging device. A discharge system includes a discharging device capable of discharging the fluid and a refilling device capable of refilling the discharging device with the fluid. A refill-side coupler provided to the refilling device side and a discharge-side coupler provided to the discharging device side is fitted and connected to refill the discharging device side with the fluid from the refilling device side.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: December 25, 2018
    Assignee: Heishin, Ltd.
    Inventors: Yusuke Tanaka, Kunihiro Ichida
  • Patent number: 10161397
    Abstract: An eccentric screw pump has at least one stator of elastic material and extending along an axis, a rotor rotatable about the axis in the stator, and an axially split stator housing at least partially surrounding the stator and, formed by at least two housing segments. A stator-clamping device presses the housing segments radially against the stator and thereby presses the stator against the rotor. It has one or more movable adjusting elements that bear radially inward on the housing segments for radially adjusting and clamping the stator and one or more actuators connected or provided with the adjusting elements for automatically positioning the housing segments.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: December 25, 2018
    Assignee: SEEPEX GMBH
    Inventors: Norman Dicks, Julian Harking, Oliver Stumpf
  • Patent number: 9856872
    Abstract: A method for operating a progressive cavity pump wherein the stator has at least first and second active stator sections that are at different locations on the stator, comprising inserting a first rotor having a first active rotor section that is aligned with the first active stator section, and rotating the first rotor relative to the first active stator section such that the aligned first active rotor and stator sections generate a pumping force. Subsequently, the first rotor is removed and a second rotor is inserted having a second active rotor section that is aligned with the second active stator section, and rotating the second rotor relative to the second active stator section such that the aligned second active rotor and stator sections generate a pumping force.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: January 2, 2018
    Assignee: Husky Oil Operations Limited
    Inventor: Stephen Gerard Barbour
  • Patent number: 9816503
    Abstract: A uniaxial eccentric screw pump for rotating a rotor about its axis and revolving the rotor without involving complicated operations and control is provided. The uniaxial eccentric screw pump includes a rotor drive mechanism capable of revolving a rotor while rotating the rotor about its axis. The rotor drive mechanism includes a rotation power transmission member rotatable about a predetermined center axis, and a revolution track formation member capable of revolving a proximal shaft portion of the rotor while allowing rotation of the proximal shaft portion about its axis. The rotor drive mechanism distributes power output from the same motor in parallel and transmit the power to the rotation power transmission member and the revolution track formation member, enabling the rotation power transmission member and the revolution track formation member to rotate about their axes while being synchronized mechanically, and enabling the rotor to revolve while rotating about its axis.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: November 14, 2017
    Assignee: HEISHIN LTD.
    Inventor: Nobuhisa Suhara
  • Patent number: 9776739
    Abstract: A system for cryocooling an optical sensor on a satellite to a temperature below 200K with minimal vibration comprising a miniature conical rotary screw compressor comprising an inner element configured to only rotate around a first stationary axis and an outer element configured to only rotate around a second stationary axis so that both elements revolve with minimal vibration; with at least one of a) a length of at least one of the inner element and the outer element is between 10 mm and 50 mm; b) a diameter of at least one of the inner element and the outer element is between 2 mm and 25 mm; c) a compression ratio of the rotary screw compressor is between 1:2 and 1:20; and d) a shaft speed of the conical rotary screw compressor is between 6001 and 20000 revolutions per minute.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: October 3, 2017
    Assignee: VERT ROTORS UK LIMITED
    Inventors: Oleg Dmitriev, Evgenii Tabota
  • Patent number: 9777728
    Abstract: A progressive cavity pump is provided, having a stator section and a rotor section axially aligned with and surrounded by the stator section, a drive shaft connection section and a suction chamber, arranged between the stator section and the drive shaft connection section; wherein the suction chamber is configured such that it can be disassembled without moving the stator section or the drive shaft connection section, thereby facilitating the performance of maintenance operations.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: October 3, 2017
    Assignee: NOV PROCESS & FLOW TECHNOLOGIES UK LIMITED
    Inventors: Gareth David Thomas, Paula Jane Edwards
  • Patent number: 9750525
    Abstract: The present invention is directed in various methods, devices and systems relating to rotational atherectomy. More specifically, an oscillating driver is connected to a drive shaft, or torque transfer tube, with abrasive element mounted thereon. The result provides a rotational working diameter for the rotating abrasive element that is larger than its resting diameter. Generally, the preferred abrasive element is concentric in profile and/or with center of mass collinear with the drive shaft's rotational axis. However, eccentric abrasive elements, both in terms of offsetting center of mass and/or geometric eccentricity may also be employed.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: September 5, 2017
    Assignee: Cardiovascular Systems, Inc.
    Inventor: Joseph Peter Higgins
  • Patent number: 9683566
    Abstract: A stator casing of an eccentric screw pump with an elastomer stator inner part including a plurality of shell-like casing segments and a production method for such a stator casing, with which the outlay for maintenance work can be reduced. According to the invention, casing segments adjacent in the longitudinal direction of the stator casing are disposed offset with respect to one another around the longitudinal axis of the stator casing, wherein each casing segment includes connection means and at least four casing segments engage with one another and form a composite. For the production of the stator casing, the casing segments are acted upon by an axial force component as a result of clamping, wherein the casing segments engage with one another, as a result of which a radial force component is generated and the composite is formed.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: June 20, 2017
    Assignee: NETZSCH Pumpen & Systeme GmbH
    Inventors: Christian Bindig, Frank Götz
  • Patent number: 9670779
    Abstract: A submersible pump assembly for use in a borehole, including a screw pump and/or an eccentric screw pump with a longitudinal axis. The submersible assembly further includes a drive and a bearing arrangement for taking up and diverting the axial and/or radial forces arising during the operation of the screw pump and/or eccentric screw pump. The drive is disposed, via a first coupling rod, at one end of the screw pump and/or eccentric screw pump and the bearing arrangement is assigned, via a second coupling rod, to the opposite end of the screw pump and/or eccentric screw pump along the longitudinal axis.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: June 6, 2017
    Assignee: NETZSCH Pumpen & Systeme GmbH
    Inventors: Klaus Heizinger, Arthur Zinke, Eudes Borchardt
  • Patent number: 9540933
    Abstract: A stator for a progressive cavity pump or motor includes a stator housing having a longitudinal axis. In addition, the stator includes a stator insert of a material moulded within the housing. The stator housing includes an outer tube having an inner surface. The stator housing also includes a plurality of framework elements disposed on the inner surface of the outer tube. Further, the stator housing includes at least one recess in the inner surface of the outer tube. The conjunction of the framework elements and the at least one recess define a plurality of chambers receiving insert material therein whereby the insert material is mechanically fixed axially, radially and torsionally within the outer tube.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: January 10, 2017
    Inventor: Andrew Morris
  • Patent number: 9506468
    Abstract: A progressive cavity pump comprising a casing, a helical stator including a helical cylinder and a helical rotor capable of rotating inside said helical cylinder. The helical stator also comprises at least one compensator arranged in said casing, between the casing and said helical cylinder; said helical cylinder and said compensator being deformable in a direction perpendicular to the longitudinal axis of the casing.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: November 29, 2016
    Assignee: PCM TECHNOLOGIES
    Inventor: Christian Bratu
  • Patent number: 9482223
    Abstract: A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: November 1, 2016
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Brian P. Jarvis, Nigel Wilcox, Brian Williams, Lance Underwood, William Murray, Peter Thomas Cariveau, Geoffrey Downton, Lawrence Lee, Shunetsu Onodera, Daniel Alvarado, Maxim Pushkarev, Gokturk Tunc, Andrei Plop, Warren Askew
  • Patent number: 9456842
    Abstract: A recanalization catheter assembly for recanalization of an occluded blood vessel is disclosed. The recanalization catheter assembly includes an elongate shaft having a tubular portion, a guide member, and a rotary ablation tool. The tubular portion includes a distal opening, from where the rotary ablation tool extends distally. The guide member extends distal of the distal opening and includes a guidewire lumen to receive a guidewire therethrough. The guide member is configured to advance over the guidewire in a subintimal space between a first tissue layer and a second tissue layer of a wall of the blood vessel, while the rotary ablation tool is advanced in a true lumen of the blood vessel.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: October 4, 2016
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Pu Zhou, Huisun Wang
  • Patent number: 9441627
    Abstract: A rotor for a progressive cavity device has a central axis and includes an outer tubular. The outer tubular has a radially outer surface and a radially inner surface defining a rotor cavity. The outer surface includes at least one helical rotor lobe. The rotor also includes a filler structure disposed within the rotor cavity. The outer tubular is made of a first material having a first density and the filler structure is made of a second material having a second density that is less than the first density.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: September 13, 2016
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventor: Alan H. Kitching
  • Patent number: 9416780
    Abstract: A method for use in producing a stator for a progressing cavity apparatus which includes the use of electroforming to produce the stator tube. A stator tube for a progressing cavity apparatus which is produced using electroforming and a stator for a progressing cavity apparatus which includes a stator tube produced using electroforming.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: August 16, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventor: David Joe Steele
  • Patent number: 9393648
    Abstract: A Moineau style stator includes a stator tube having a plurality of rigid helical lobes formed on an inner surface thereof. The helical lobes define a major internal tube diameter that is greater than a pass through diameter of the tube such that the major diameter undercuts the pass through diameter of the tube. A major liner diameter may also be less than the pass through diameter so as to provide a suitable interference fit between rotor and stator.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: July 19, 2016
    Assignee: SMITH INTERNATIONAL INC.
    Inventors: Lance D. Underwood, William D. Murray, Thomas K. Washburn
  • Patent number: 9382800
    Abstract: A pump assembly comprising a stator and a rotor having vanes of opposite handed thread arrangements is described. A radial gap is located between the stator vanes and the rotor vanes such that rotation of the rotor causes the stator and rotor to co-operate to provide a system for moving fluid longitudinally between them. The operation of the pump results in a fluid seal being is formed across the radial gap. The described apparatus can also be operated as a motor assembly when a fluid is directed to move longitudinally between the stator and rotor. The presence of the fluid seal results in no deterioration of the pump or motor efficiency, even when the radial gap is significantly greater than normal working clearance values. Furthermore, the presence of the radial gap makes the pump/motor assembly ideal for deployment with high viscosity and/or multiphase fluids.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: July 5, 2016
    Assignee: HIVIS PUMPS AS
    Inventor: Alastair Simpson
  • Patent number: 9347266
    Abstract: The present invention recites a downhole motor and method of manufacture wherein a mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator is provided. A flexible sleeve is provided over the mandrel and the flexible sleeve and the mandrel are provided into a mold. Additionally, a reinforcing material is introduced into the mold to fill space between the flexible sleeve and the mold. Said material is then solidified to bond the reinforcing material and the flexible sleeve. The solidified reinforcing material and flexible sleeve are then removed from the mold such that a stator insert is fabricated.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: May 24, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Hossein Akbari, Julien Ramier, Tony Camuel
  • Patent number: 9334691
    Abstract: A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: May 10, 2016
    Assignee: SMITH INTERNATIONAL, INC.
    Inventors: Brian P. Jarvis, Nigel Wilcox, Brian Williams, Lance Underwood, William Murray, Peter Thomas Cariveau
  • Patent number: 9309753
    Abstract: A surface drivehead drives a downhole pump by rotating a rod string at the surface. The downhole pump can be connected downhole to the rod string via a downhole latching mechanism. The surface drivehead has an assembly that can move the rod string upwards or downwards along an axis to either increase or decrease rod string tension. During rod string rotation, rod tension is monitored. If rod string tension changes during rotation, the surface drivehead can automatically compensate by moving the rod string upwards or downwards along the axis to either recapture or eliminate tension. In this way, the surface drivehead can maintain a substantially constant rod string tension to drive the downhole pump at high speeds.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 12, 2016
    Assignee: Weatherford Technology Holdings, LLC
    Inventors: Evan Noble, Eduardo Perdomini Lara
  • Patent number: 9228585
    Abstract: An eccentric screw machine (10) demonstrates a Stator (11) having an inner lining (17), which demonstrates teeth projecting inwards. The tips of these teeth are provided with micro-ribs (26 to 29), which are embodied asymmetrically with respect to the radials (R). They preferably demonstrate a flatly rising edge (30) and a steeply falling edge (31). This thus results in improved operating performance, depending on the direction of rotation.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: January 5, 2016
    Assignee: Wilhelm Kachele GmbH
    Inventor: Bruno Kachele
  • Patent number: 9163629
    Abstract: The present invention relates to a resilient material lined stator and method of forming. A method of forming a resilient material lined stator can include disposing a resilient material tube 400 with a profiled helical inner surface 401 into the bore of a body 420. A cast material 410 can be disposed therebetween. The cast material 410 can bond to the body 420 to form a resilient material lined stator or the body 420 can be removed. The cast material 310 can include a conduit 312 or conductor 314 extending therethrough. The cast material 310 can include a pathway 316 formed therethrough. The resilient material can be an elastomer.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: October 20, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Lawrence Lee, Michael Shepherd
  • Patent number: 9133841
    Abstract: Progressing cavity devices and systems are provided. In one embodiment, a system includes a metal stator of a progressing cavity device. The metal stator includes metal plates with apertures that are rotationally offset to form a winding rotor cavity. At least one of the apertures that form the winding rotor cavity has an elongated profile with enlarged ends having widths greater than that across the middle of the at least one aperture. Additional systems, devices, and methods are also disclosed.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: September 15, 2015
    Assignee: Cameron International Corporation
    Inventors: Derek L. Twidale, Majid S. Delpassand, Leonard J. Vogel, Allen T. Le
  • Patent number: 9127508
    Abstract: A drilling apparatus includes a progressive cavity device that includes a plurality of linearly coupled rotors. Each rotor is disposed in a separate stator. Adjoining stators are separated by a coupling device configured to provide lateral support to the rotors. The stators may be enclosed in a common housing. The adjoining stator sections may be rigidly connected to each other.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: September 8, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Kyle L. Taylor, Sundaie L. Klotzer
  • Publication number: 20150139842
    Abstract: A progressive cavity pump comprising a casing, a helical stator including a helical cylinder and a helical rotor capable of rotating inside said helical cylinder. The helical stator also comprises at least one compensator arranged in said casing, between the casing and said helical cylinder; said helical cylinder and said compensator being deformable in a direction perpendicular to the longitudinal axis of the casing.
    Type: Application
    Filed: May 28, 2013
    Publication date: May 21, 2015
    Inventor: Christian Bratu
  • Publication number: 20150125329
    Abstract: A progressing cavity pump/motor includes a stator (12) having a metal interior surface (14) and one or more spiraling internal lobes (16). The rotor (18) has a metal exterior surface (20) and one or more spiraling external lobes (22) for cooperating with the stator to form progressing cavities between the stator and the rotor during rotation of the rotor. At least one of the stator interior surface and the rotor exterior surface include a plurality of spaced grooves (30) in the respective surface, such that fluid flowing to a gap between the stator and the rotor is disrupted by the spaced grooves to reduce fluid leakage between the stator and the rotor.
    Type: Application
    Filed: December 9, 2014
    Publication date: May 7, 2015
    Inventor: Michael J. Guidry, JR.
  • Publication number: 20150118085
    Abstract: An eccentric screw pump for delivering fluid and/or granular media. The pump body of the eccentric screw pump includes an inlet region, a pump unit and an outlet region. A drive unit is assigned to the inlet region. The pump unit includes a rotor and a stator, wherein the rotor moves eccentrically in the stator. The inlet region constitutes the suction side and the outlet region constitutes the pressure side of the eccentric screw pump. A bypass connection with at least one safety valve is assigned to the eccentric screw pump in order to take up and return back-flowing medium between the pressure side and the suction side of the eccentric screw pump. The bypass connection and the safety valve may also be integrated into the pump body of the eccentric screw pump.
    Type: Application
    Filed: October 24, 2014
    Publication date: April 30, 2015
    Inventors: Lorenz Lessmann, Elimar Volkmann
  • Patent number: 8985977
    Abstract: An apparatus for use in a wellbore may include a stator having a bore and a rotor disposed in the bore. Either or both of the rotor and the stator may include a layer that has an asymmetrical material property profile along at least a portion of a circumference of that layer.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: March 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Carsten Hohl, Helmut G. Benning
  • Publication number: 20150078943
    Abstract: A well pump assembly includes a progressive cavity pump having a stator with an elastomeric inner portion. The stator has an axial cavity with internal lobes; a rotor with external lobes positioned within the axial cavity. An effector selectively increases and decreases a stiffness of the stator by changing a cross sectional area of the axial cavity in the stator. The effector may include a reservoir within the stator containing a fluid. A reservoir pump selectively increases and decreases a pressure of the fluid in the reservoir in response to sensing the flow rate from the progressive cavity pump and the torque of the motor. Alternately, the reservoir may contain a magneto-rheological fluid (MR fluid). A coil generates an electromagnetic field within the MR fluid to selectively increase and decrease a viscosity of the MR fluid.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 19, 2015
    Inventors: Shawn N. Gunter, Kenneth T. Bebak, Randall L. Maxwell, Thomas N. Hendryx
  • Publication number: 20150064037
    Abstract: A helical rotor intended to be arranged in a progressing cavity pump, said progressing cavity pump being capable of pumping a multiphase fluid from a fluid reserve, the helical rotor comprising at least one mixer capable of homogenizing the multiphase fluid located in said fluid reserve.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventors: Vasileios Kourakos, Souleymane Ramde
  • Patent number: 8967985
    Abstract: A stator for a helical gear device is formed from multiple rigid disks and support rings bonded to the disks. Each disk forms part of a profile consisting of radially equally spaced or opened lobes which interact with the convex portions of rotor lobes. The disks are arranged into a desired helical configuration and bonded to one another to form a disk stack defining a helically convoluted elongated chamber therein. The support rings are fixed concentrically against respective end disks of the disk stack. The rings are sized with an inside diameter substantially equal to the major diameter of the central aperture defined by the radially extending lobes of the rigid disks. As a rotor rotates and nutates inside the helically convoluted elongated chamber of the stator, it is supported at both ends of the disk stack by the support rings touching the tips of the rotor lobes. Thus the full force of the rotor's operational inertia is not borne by the disks alone, thereby increasing their life.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 3, 2015
    Assignee: Roper Pump Company
    Inventors: Edmond Coghlan, III, Tyson Bentley Anderson, John Eugene Purcell, Zachariah Paul Rivard
  • Patent number: 8944789
    Abstract: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber, nanotube, metal, ceramic, or polymer. A dispersing agent may be used to obtain a homogenous distribution. A magnetic reinforcing agent may be incorporated into a stator insert. The stator insert is subjected to a magnetic field to orient the magnetic reinforcing agent in a particular orientation. The magnetic field may also reposition the magnetic reinforcing agent within the stator insert. The stator insert may be formed by injection molding, transfer, or compression molding among other methods.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: February 3, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventors: Stefan Butuc, Jiinjen A. Sue, Harold A. Sreshta, Joshua A. Sicilian
  • Publication number: 20140377112
    Abstract: Downhole motors include a stator, which may be formed from a steel material and comprise a bore. At least one surface of the stator may be treated with a surface treatment. The surface treatment includes a nitrided region comprising nitrogen diffused into the steel material and a ceramic material adjacent to the nitrided region; the ceramic material defining an interior surface of the stator defining the bore. Methods of making downhole motors may include exposing a stator to an elevated temperature to heat the stator in a nitrogen-rich environment. Nitrogen may be diffused into a steel material of the stator and a nitrided region may be formed at one or more surfaces of the stator. The stator may be cooled. The stator may be removed from the nitrogen-rich environment. A ceramic material may be coated on the nitrided region of the stator.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Kyle L. Taylor, Chih C. Lin, Denis S. Kopecki
  • Publication number: 20140369875
    Abstract: Techniques are generally described for a progressive cavity pump and a methods for making and using a progressive cavity pump. In an example, a progressive cavity pump may include a stator, a rotor and/or a bearing. The stator may include a helical shaped interior with a first pitch. The rotor may be inside the stator. The rotor may include a helical shaped exterior with a second pitch. The second pitch may be different from the first pitch. The rotor may be effective to rotate with respect to the stator and effective to move eccentrically within the stator to define at least one cavity inside the stator. At least one bearing may be between the rotor and the stator. The bearing may be sized and shaped so that the rotor is effective to rotate inside the bearing and the bearing is effective to move eccentrically along with the rotor.
    Type: Application
    Filed: April 20, 2013
    Publication date: December 18, 2014
    Inventors: Abdus Samad, Ramasamy Karthikeshwaran