公开(公告)号：CA2479917C

公开(公告)日：2009-11-24

申请号：CA2479917

申请日：2003-03-18

Applicant: NAT OILWELL NORWAY AS

Inventor： MOE MAGNE ,  KYLLINGSTAD AGE

IPC: F04B53/10 ,  F04B39/10 ,  F16K15/02 ,  F16K15/06

Abstract: A valve arrangement for reciprocating machine, where the arrangement (1) comprises an in-valve (18) and an out-valve (19), each valve (18), (19) bein g a springloaded one-way valve designed to open for flow when the pressure differential in the direction of flow provides a force that exceeds the spri ng tension, wherein the valves (18, 19) are mounted in a casing (8) that forms or is connected to the cylinder head of the reciprocating engine (2). The in- valve (18) and the out-valve (19) are mounted in a sleeve (16) designed to b e fitted in a bore (9) in the casing (8), and where fluid may flow to the slee ve (16) from an inlet (11) in the casing (8) and into the sleeve (16) via the i n- valve (18), and where the sleeve (16) is provided with at least one perforat ed area where fluid may flow radially out of or into the sleeve (16) via holes (50, 51), thereby flowing to or from a passage (14, 15) that forms a perpendicular or near perpendicular connection with the bore (9).

公开(公告)号：NO20081474L

公开(公告)日：2009-09-28

申请号：NO20081474

申请日：2008-03-26

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: H02K29/14 ,  G06F17/14

公开(公告)号：NO20074261L

公开(公告)日：2009-02-23

申请号：NO20074261

申请日：2007-08-21

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: G01M3/26 ,  G01M3/02

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.

公开(公告)号：CA2685799A1

公开(公告)日：2008-11-06

申请号：CA2685799

申请日：2008-04-21

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: G01M3/24

Abstract: A method for detection of a malfunction related to a fluid affected compo nent of a piston machine (1), where the method includes: - attaching a vibra tion sensor to or near at least one valve block (14', 14", 14'''), of the pi ston machine (1); - measuring the vibrations from the valve block (14', 14", 14'''); - presenting the obtained vibration signal from the vibration senso r (16', 16", 16''') for analysis by a human or a computer; and - analyzing t he signal with respect to revealing a malfunction related to a fluid affecte d component of the piston machine (1).

公开(公告)号：DK1759087T3

公开(公告)日：2008-06-16

申请号：DK05754084

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.

公开(公告)号：NO323418B1

公开(公告)日：2007-04-30

申请号：NO20051916

申请日：2005-04-20

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: G01M3/26 ,  F04B49/00 ,  F04B51/00 ,  F17C20060101 ,  G01M3/02

Abstract: A method of determining a leakage in a piston machine comprising at least two pistons is provided. The rotational velocity of the piston machine, and therefore the volume flow through the piston machine, is varied periodically as part of a time-limited active test while measuring the differential pressure and the angular position. An angular position-based Fourier analysis of the measured values from differential pressure and rotational velocity measurements performed during the test are used to experimentally determine the amplitude ratio and phase angle difference between volume flow variations and pressure variations. The amplitude ratio and phase angle difference are used, together with an angular position-based Fourier analysis of the measurements of differential pressure and rotational speed made after the active test, to determine the amplitude and phase of the leakage flow.

公开(公告)号：DE60308491D1

公开(公告)日：2006-11-02

申请号：DE60308491

申请日：2003-03-18

Applicant: NAT OILWELL NORWAY AS

Inventor： MOE MAGNE MATHIAS ,  KYLLINGSTAD AGE

IPC: F04B53/10 ,  F04B39/10 ,  F16K15/02 ,  F16K15/06

公开(公告)号：PL360701A1

公开(公告)日：2004-09-20

申请号：PL36070101

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.

公开(公告)号：NO20042651D0

公开(公告)日：2004-06-24

申请号：NO20042651

申请日：2004-06-24

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: E21B20060101 ,  E21B47/18 ,  E21B

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.

公开(公告)号：CA2482417A1

公开(公告)日：2003-10-23

申请号：CA2482417

申请日：2003-04-10

Applicant: NAT OILWELL NORWAY AS

Inventor： KYLLINGSTAD AGE

IPC: F04B49/10 ,  G01M3/02 ,  G01M3/26

Abstract: A method of and device for detecting a leak in reciprocating machinery (1), comprising at least two pistons (2, 2'), by the volume flow at least out of the reciprocating machinery (1) being monitored and analysed, e.g. by means of Fourier analysis, in order to make it possible to detect a flow component, where the flow component has a frequency that differs from the fundamental frequency of the reciprocating machinery, the fundamental frequency of thereciprocating machinery being constituted by the rotational frequency of the reciprocating machinery multiplied by the number of pistons (2, 2') in t he reciprocating machinery.