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US 2001/0055537 A1Published application
Downhole roller vane motor and roller vane pump
OwnerArnold W.J. Gruppinginventor
Life of this patent
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OwnerArnold W.J. Gruppinginventor
Estimating the term…
A roller vane motor for downhole drilling comprises a housing (1) and a rotor (2). The housing contains wing deflector cams (5) that divide the space between housing and rotor into chambers (8a, b). The rotor is equipped with cylindrical rollers (7) in recesses (6), which rollers can move between an extended and a retracted position. Drilling fluid enters the chamber parts (8a) through inlet ports (10) in the upper bearing part of the housing (1) and pushes rollers (71) into their extended position and in a clockwise direction, making the rotor turn, whilst drilling fluid of lower pressure is pushed from the corresponding chamber parts (8b) through outlet ports (9) in the lower bearing part of the housing (1) and further to the drill bit below. When the rollers (71) reach the wing deflector cams (5) they are forced into the retracted position, their task being taken over by rollers (72).
A roller vane motor driven by a fluid, or roller vane pump for pumping a fluid, comprising a housing with axial ends located at opposite sides, with in between an imaginary principal axis, and a rotor that rotates around this principal axis in a rotor space inside the housing, with an annular space between the rotor and the inner wall of the housing, said housing being provided with an plurality of inwardly projecting wing deflector cams that divide the annular space between the rotor and the inner wall of the housing into chambers, said rotor being provided with a plurality of recesses located along the circumference of said rotor and extending substantially parallel to the principal axis, each recess having a cylindrical roller that is displaceable from an extended position, in which the roller is in contact with the inner wall of the housing between wing deflector cams, to a retracted position, in which the roller is in contact with a wing deflector cam, said roller dividing the chambers into a high-pressure chamber part and a lower-pressure chamber part, each wing deflector cam having a rising part that runs inward from the inner wall of the housing and forces a passing roller from its extended position into its retracted position, and a falling part that runs outward towards the inner wall of the housing and allows a passing roller to move from its retracted position towards its extended position, whereby inlet ports and outlet ports for the driving fluid or the pumped fluid are provided, that are connected to the rotor space, wherein between the axial ends of the housing a passage has been provided for passing the driving fluid or the pumped fluid.
A roller vane motor driven by a fluid, or roller vane pump for pumping a fluid, comprising a housing with axial ends located at opposite sides, with in between an imaginary principal axis, and a rotor that rotates around this principal axis in a rotor space inside the housing, with an annular space between the rotor and the inner wall of the housing, said housing being provided with a plurality of inwardly projecting wing deflector cams that divide the annular space between the rotor and the inner wall of the housing into chambers, said rotor being provided with a plurality of recesses located along the circumference of said rotor and extending substantially parallel to the principal axis, each recess having a cylindrical roller that is displaceable from an extended position, in which the roller is in contact with the inner wall of the housing between wing deflector cams, to a retracted position, in which the roller is in contact with a wing deflector cam, said roller dividing the chambers into a high-pressure chamber part and a lower-pressure chamber part, each wing deflector cam having a rising part that runs inward from the inner wall of the housing and forces a passing roller from its extended position into its retracted position, and a falling part that runs outward towards the inner wall of the housing and allows a passing roller to move from its retracted position towards its extended position, whereby inlet ports for the driving fluid or the pumped fluid are provided, that are connected to the rotor space, wherein the housing at one of its axial ends has a first bearing part for the rotor, in which first bearing part at or near each falling part of a wing deflector cam one or more inlet ports are provided, and wherein the housing at its other axial end has a second bearing part for the rotor, and wherein at or near each rising part of a wing deflector cam one or more outlet ports are provided that debouch into the outer surface of the housing between its axial ends.
A Roller vane pump for pumping a fluid, comprising a housing with axial ends located at opposite sides, with in between an imaginary principal axis, and a rotor that rotates around this principal axis in a rotor space inside the housing, with an annular space between the rotor and the inner wall of the housing, said housing being provided with a plurality of inwardly projecting wing deflector cams that divide the annular space between the rotor and the inner wall of the housing into chambers, said rotor being provided with a plurality of recesses located along the circumference of said rotor and extending substantially parallel to the principal axis, each recess having a cylindrical roller that is displaceable from an extended position, in which the roller is in contact with the inner wall of the housing between wing deflector cams, to a retracted position in which the roller is in contact with a wing deflector cam, said roller dividing the chambers into a high-pressure chamber part and a lower-pressure chamber part, each wing deflector cam having a rising part that runs inward from the inner wall of the housing and forces a passing roller from its extended position into its retracted position, and a falling part that runs outward towards the inner wall of the housing and allows a passing roller to move from its retracted position towards its extended position, whereby inlet ports and outlet ports for the pumped fluid are provided that are connected to the rotor space, wherein the housing at one of its axial ends has a first bearing part for the rotor in which first bearing part at or near each rising part of a wing deflector cam one or more outlet ports are provided, wherein the housing at its other axial end has a second bearing part for the rotor, and wherein at or near each falling part of a wing deflector cam the housing is provided with inlet ports between its axial ends for the supply of fluid to the rotor space.
A roller vane motor driven by a fluid, or roller vane pump for pumping a fluid as claimed in one or more of the previous claims, wherein at the falling part of each wing deflector cam a first passage is provided that, during the movement of a roller down this falling part from the retracted position to the extended position, forms an open connection between the chamber part that is situated ahead of said roller and the chamber part that is situated behind said roller.
A roller vane motor or roller vane pump as claimed in one or more of the previous claims, wherein at the rising part of each wing deflector cam a second passage is provided that, during the movement of a roller up this rising part from the extended position to the retracted position, forms an open connection between the chamber part that is situated ahead of said roller and the chamber part that is situated behind said roller.
Dependencies are inferred from the claim text.