摘要:
The invention relates to a transmission system for transmitting signals between an inner and an outer unit separated by an annular pipe section wall, wherein said inner unit is provided with a first antenna and the second unit is provided with a second antenna, the antennas preferably constituted by coils, being adapted to be brought into essentially the same positions along the pipe section, wherein said pipe section is made from a material having low magnetic permeability and wherein at least one of the antennas is provided magnetic shield having high magnetic permeability, the corresponding antenna being positioned between the pipe wall and the magnetic shield and the magnetic shield extending along the length of the antenna.
摘要:
Valve for throttling the flow rate of a fluid, distinguished in that it comprises a bolt (12), a pipe section (8) having inner dimension adapted to enclose the bolt sealingly, a groove (13) in at least one of the outer surface of the bolt and the inner surface of the pipe section, the groove providing a fluid passageway between the enclosed bolt and pipe section, an inlet port having fluid connection to an upstream end of the groove, an outlet port having fluid connection to a downstream end of the groove, and means to adjust a coaxial position of the bolt (12) relative to the pipe (8), by moving one or both of the bolt and pipe section, in order to adjust the throttling effect of the valve. System comprising valves of the invention.
摘要:
Electrical and/or optical connector housing (11) with a wet-mateable connector receiving part (17), adapted to receive a mating electrical and/or optical connector counterpart when surrounded by a hydrostatic pressure, such as the pressure of surrounding water. The connector housing (11) exhibits a compartment (19) that is pressure balanced with respect to said hydrostatic pressure, wherein one or more electrical and/or optical conductors (21) are guided from the receiving part (17) to a penetrator (15), said penetrator (15) constituting a pressure barrier between said compartment (19) and an opposite end of the penetrator (15). The housing (11) comprises at least one wall part (29) adapted to be flexed by an exterior hydrostatic pressure exerting force on the housing (11), thereby changing the volume of said inner compartment (19), whereby said wall part (29) constitutes at least a part of the encapsulation of said compartment (19).
摘要:
A well head barrier assembly (1, 2, 3) including a termination of an instrument tube (9) installed in a well and a primary pressure barrier (3) for the well pressure comprising a tool (10) arranged for being pushed into a passage (5) in which the instrument tube (9) is arranged. The closing of the passage (5) provides an additional secondary pressure barrier in the well head, thus enabling re-establishment of a double pressure barrier following a breakage of the instrument tube (9).
摘要:
Method and device for monitoring a zone (2)of a metal structure (1) in terms of its electrical resistance in order to detect possible defects in the structure, by periodically passing current through the zone in different directions while measuring and recording voltage drops in a number of selected unit areas (a ij ) within the zone (2), and by combining, for each unit area (a ij ), at least two measured values recorded during at least two measurements made with current passing in different directions, and by comparing values obtained by at least one similarly obtained value made earlier.
摘要:
This invention relates to a measuring instrument for measurement of a flow (1) comprising - a dielectric resonator sensor (3) arranged in a pipeline (2), said resonator (3) having a surface (4) facing a flow volume, - a sensor drive unit (12) being coupled to said sensor (3) and which is adapted to provide a driving or excitation signal to said sensor (3) resulting in the excitation of an electromagnetic resonance in said sensor causing a fringing electromagnetic field (5) adjacent to said surface (4) facing said wet gas flow (1), - a recording unit (10) coupled to said sensor (3) and which is adapted to measure a resonance property of said sensor (3) while said wet gas flow (1) moves past said sensor surface (4), and - a processing unit (11) which is adapted to estimate a property of at least a part of said wet gas flow (1).
摘要:
An electric system especially for measurement and control in an oil/gas well using transmission of electric signals and supply of electric power. The system is provided with a current loop (5,6) having an essentially constant current in a current loop and a number of downhole network nodes (1N) which are connected to the system.
摘要:
This invention relates to a compact density measuring instrument for measuring density of fluids in a volume in a container, especially in a fluid flow in a pipe, the instrument comprising a radiation source in the gamma range positioned on one side of the fluid and a detector positioned on the opposite side of the fluids for receiving said radiation, and the fluid being contained in the container, wherein the source is positioned in a source housing, said source housing being at least partially fitted into a corresponding recess in the container wall, said source housing comprises a source holder containing the gamma source positioned in the holder axis and comprising a coaxial opening from the source through one end of the holder, said one end adapted to be aimed toward the fluid.
摘要:
There is provided a differential pressure (dP) measurement device for use in flow measurement comprising a first microwave resonator (1) having a flexible or yieldable part or member (4) deformable or yieldable when subject to a differential pressure in such a way as to alter a resonant frequency of said resonator, and an electronic unit (12, 14) which is coupled to said resonator (1), and where said electronic unit is adapted to produce an output depending on a resonant frequency of said resonator (1).
摘要:
Apparatus for measuring the composition and flow rate of a fluid (1) comprising a mixture of e.g. oil and water in a pipe (2), wherein an integrated mechanical structure (3) serves as a microwave resonator sensor for providing permittivity measurements and where the mechanical structure also functions as a differential pressure element for providing flow rate measurements.