The present invention relates to a system, a method, and a computer program product for detecting a process disturbance from entrained gas or particulates within a fluid flowing in a vibrating flow device (5). In one embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value and a comparison between a void fraction and a void fraction threshold value. In another embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value, a comparison between a void fraction and a void fraction threshold value, and a comparison between a measured mass flow rate and a nominal mass flow rate threshold value. In yet another embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value and a comparison between a measured pick-off amplitude and a pick-off amplitude threshold value.

A method for forming a flameproof transmitter is disclosed. The transmitter includes a flameproof housing including an interior surface, a display aperture and a shoulder adjacent to the aperture at first end of the housing. A transparent panel including an outer face and a perimeter is inserted into the housing from a second end to threadingly engage a fastener feature located on the interior surface of the housing such that the fastener element contacts the transparent panel and retains the transparent panel against the shoulder. A perimeter interface region between the perimeter of the transparent panel and the interior surface of the flameproof housing creates a perimeter gap that does not exceed a predetermined flameproof gap limit and a face interface region between the outer face of the transparent panel and the shoulder creates a face gap that does not exceed the predetermined flameproof gap limit.

An apparatus having a shaft, a bearing sleeve for rotatably supporting the shaft, a housing, in which at least one part of the bearing sleeve is arranged, and a sealing element, which seals a gap between a wall of the housing and the bearing sleeve. The sealing element divides the gap gas-tight into a first partial space adjacent to the front side of the sealing element and a second partial space adjacent to the back side of the sealing element, the sealing element having a flexible part, which is in contact with the wall of the housing and/or the bearing sleeve, and the housing having a first barrier gas inlet for introducing barrier gas into the first partial space as well as a second barrier gas inlet for introducing barrier gas into the second partial space.

A multichannel flow tube (300) for a vibratory meter (5), and a method of manufacturing the multichannel flow tube are provided. The multichannel flow tube comprises a tube perimeter wall (304), a first channel division (302b), and a first support structure (308a). The first channel division is enclosed within and coupled to the tube perimeter wall, forming a first channel (306b) and a second channel (306c). The first support structure is coupled to the tube perimeter wall and the first channel division.

Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency, and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to kinematic viscosity, inverse Stokes number, and drive frequency; velocity of sound and drive velocity; or the length of the flow tube. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the kinematic viscosity, inverse Stokes number, and effective diameter; or velocity of sound and effective diameter.

A system and method of maintaining back pressure located downstream of the Coriolis meter maintains the pressure downstream of the Coriolis meter in relation to the surface back pressure (SBP). At least one flow control device is located downstream of the Coriolis meter. The flow control device of the present invention (the BPV) automatically maintains the downstream pressure to less than or equal to fifty percent (50%) of the surface back pressure. A pressure regulator sets the back pressure to allow for a standalone device. Additional valves allow adjustment of the back pressure and allow for pressure relief and full flow bypass.

A flowmeter (5) is provided. The flowmeter (5) has a wetted assembly (200) comprising one or more conduits (208, 208), and at least one driver magnet (218, 218) attached to the one or more conduits (208, 208). A dry assembly (202) houses a driver coil (224), and meter electronics (20) are in electrical communication with the driver coil (224). A case (236) at least partially covers the wetted assembly (200) and the dry assembly (202). The dry assembly (202) is removably attachable to the wetted assembly (200). The driver coil (224) is in magnetic communication with the at least one driver magnet (218, 218) when the dry assembly (202) is attached to the wetted assembly (200), and the driver coil (224) is configured to provide a vibratory signal to the at least one driver magnet (218, 218) when the dry assembly (202) is attached to the wetted assembly (200).

A first and second vibratory meter (5), and methods of manufacturing the same are provided. The first vibratory meter includes a pickoff (170l), a driver (180), and a flow tube (400) comprising a tube perimeter wall with: a first substantially planar section (406a), a second substantially planar section (406b) coupled to the first substantially planar section to form a first angle ?1#191 (404), and a first curved section (406c). The second vibratory meter includes a pickoff, a driver, and a flow tube (700) comprising a tube perimeter wall with: a first substantially planar section (706a), a second substantially planar section (706b) coupled to the first substantially planar section to form a first angle ?1#191 (704), a third substantially planar section (706c), a fourth substantially planar section (706d), and a fifth substantially planar section (706e).

A downhole tool includes a membrane to separate water from a formation fluid and a meter that operates as a densitometer and a Coriolis effect flowmeter.

Vibratory meters (5), and methods for their use measuring a fluid are provided. Each vibratory meter includes a multichannel flow tube (300) comprising two or more fluid channels (302), a pickoff (170), a driver (180), and meter electronics (20) configured to apply a drive signal to the driver at a drive frequency , and measure a deflection of the multichannel flow tube with the pickoff. In examples, at least one fluid channel has an effective diameter that is related to kinematic viscosity, inverse Stokes number, and drive frequency. In further examples, the driver may apply a drive signal to the driver having a drive frequency proportional to the kinematic viscosity, inverse Stokes number, and effective diameter.