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    21.
    发明专利
    未知

    公开(公告)号：BRPI0815582A2

    公开(公告)日：2015-02-18

    申请号：BRPI0815582

    申请日：2008-07-25

    Applicant: NAT OILWELL NORWAY AS

    Inventor： KYLLINGSTAD AGE

    IPC: G01M3/26 ,  F04B51/00

    Abstract: A method for detection of a fluid leak related to at least one piston machine (1), where the method includes: —attaching a pressure sensor (18, 24) to at least a pressure side of the at least one piston machine (1); —measuring the pressure on the pressure side of the at least one piston machine (1); —attaching a transmitter (28) to the at least one piston machine (1), said transmitter (28) rendering a signal for calculating the rotational speed of the at least one piston machine (1); —calculating the speed of the at least one piston machine (1); —calculating the sum of nominal flow rates from all piston machines (1); —calculating a flow rate compensation factor; —calculating a normalized pressure (42) to be equal to the discharge pressure multiplied by the said compensation factor for the flow rate; and —monitoring the normalized pressure (42) to detect a leakage.

    23.
    发明专利
    未知

    公开(公告)号：DE602005005195D1

    公开(公告)日：2008-04-17

    申请号：DE602005005195

    申请日：2005-06-20

    Applicant: NAT OILWELL NORWAY AS

    Inventor： KYLLINGSTAD AGE

    IPC: E21B20060101 ,  E21B47/18

    Abstract: A method of filtering out pressure noise generated by one or more piston pumps, where each pump is connected to a common downstream piping system, and where the discharge pressure is measured by a pressure sensitive gauge, wherein the instantaneous angular position(s) of the pump(s)' crankshaft or actuating cam is/are measured simultaneously with the discharge pressure and used as fundamental variables in an adaptive mathematical noise model.

    24.
    发明专利
    未知

    公开(公告)号：BRPI0512401A

    公开(公告)日：2008-03-04

    申请号：BRPI0512401

    申请日：2005-06-20

    Applicant: NAT OILWELL NORWAY AS

    Inventor： KYLLINGSTAD AGE

    IPC: E21B20060101 ,  E21B47/18

    Abstract: A method of filtering out pressure noise generated by one or more piston pumps, where each pump is connected to a common downstream piping system, and where the discharge pressure is measured by a pressure sensitive gauge, wherein the instantaneous angular position(s) of the pump(s)' crankshaft or actuating cam is/are measured simultaneously with the discharge pressure and used as fundamental variables in an adaptive mathematical noise model.

    ARRANGEMENT AT A PISTON ENGINE AND METHOD OF CONTROLLING THEPISTONS
    25.
    发明专利
    ARRANGEMENT AT A PISTON ENGINE AND METHOD OF CONTROLLING THEPISTONS 未知

    公开(公告)号：CA2422039C

    公开(公告)日：2007-05-29

    申请号：CA2422039

    申请日：2001-09-13

    Applicant: NAT OILWELL NORWAY AS

    Inventor： MOE MAGNE ,  KYLLINGSTAD AGE

    IPC: F04B9/04 ,  F04B1/14 ,  F04B11/00

    Abstract: A piston engine in the form of a piston pump or a piston engine (motor) comprises two or more piston cylinders (14b, 14c), preferably positioned wit h the same angular distances of 180 degrees for two cylinders, 120 degrees for three cylinders etc. with regards to an axis, and each comprising a reciprocating piston with a projecting piston rod (18b, 18c). Via the piston rods (18b, 18c), each piston is given a controlled displacement matched to t he controlled, given displacement of another or other pistons. The control mean s is rotatable and influences the projecting outer end portions of the piston rods or parts fitted to these, for instance rotatable rollers (20b, 20c). By a piston pump of this type, the piston are to contribute to impelling a fluid flow, while a piston engine of this type shall be designed to be driven by a fluid flow. Operating conditions are aimed at which give a more even volume flow, i.e. without any significant fluctuations. For this purpose, said rotatable control means is designed with an encircling cam surface (52) whic h the piston rod ends abut via the peripheral surface of said rotatable roller s (20b, 20c). According to a feature of a method associated with the applicati on of such a piston engine, each piston may with advantage be driven at a constant speed through part of its power stroke.

    30.
    发明专利
    未知

    公开(公告)号：BR0113862A

    公开(公告)日：2003-07-22

    申请号：BR0113862

    申请日：2001-09-13

    Applicant: NAT OILWELL NORWAY AS

    Inventor： MOE MAGNE ,  KYLLINGSTAD AGE

    IPC: F04B1/14 ,  F04B9/04 ,  F04B11/00

    Abstract: A piston engine in the form of a piston pump or a piston engine (motor) comprises two or more piston cylinders ( 14 b, 14 c), preferably positioned with the same angular distances of 180 degrees for two cylinders, 120 degrees for three cylinders etc. with regards to an axis, and each comprising a reciprocating piston with a projecting piston rod ( 18 b, 18 c). Via the piston rods ( 18 b, 18 c), each piston is given a controlled displacement matched to the controlled, given displacement of another or other pistons. The control means is rotatable and influences the projecting outer end portions of the piston rods or parts fitted to these, for instance rotatable rollers ( 20 b, 20 c). By a piston pump of this type, the pistons are to contribute to impelling a fluid flow, while a piston engine of this type shall be designed to be driven by a fluid flow. Operating conditions are aimed at which give a more even volume flow, i.e. without any significant fluctuations. For this purpose, said rotatable control means is designed with an encircling cam surface ( 52 ) which the piston rod ends abut via the peripheral surface of said rotatable rollers ( 20 b, 20 c). According to a feature of a method associated with the application of such a piston engine, each piston may with advantage be driven at a constant speed through part of its power stroke.

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