Welltec A/s

Jimmy Kjærsgaard-Rasmussen

Jørgen Hallundbæk

Ulrik Weiland Robenhagen

Ulrik Robenhagen

Jørgen HALLUNDBÆK

A downhole tool for determining laterals in a borehole wall or a borehole casing, comprising a tool housing extending along a longitudinal axis and having a circumference perpendicular to the longitudinal axis and a plurality of sonic transceivers. Each sonic transceiver transmitting sonic signals from the housing and receiving sonic signals reflected from the borehole wall or borehole casing in a predefined angular segment. The sonic transceivers are arranged along the circumference of the tool housing having a mutual distance and are capable of transmitting sonic signals radially away from the tool housing in an entire central angle of 360 degrees towards the borehole wall or borehole casing. During a pulse time, one sonic transceiver transmits a sonic signal in the predefined angular segment of that sonic transmitter, and one sonic transceiver, during a subsequent echo time, receives a reflected sonic signal from the borehole wall or borehole casing.

Downhole tool for determining laterals

A downhole tool may include a tool housing extending along a longitudinal axis and having a circumference which is perpendicular to the longitudinal axis, the tool housing being adapted to be lowered into the inside of the borehole or borehole casing. The downhole tool may include a longitudinal transducer for transmitting a probing signal longitudinally from an end part of the tool housing into a fluid flowing in said borehole or borehole casing and for receiving a reflected signal reflected from reflective entrained surfaces in the fluid flowing along a longitudinal direction towards the end part of the tool housing. The downhole tool may include a plurality of electrodes arranged spaced apart around the longitudinal axis in the periphery of the downhole tool so that the fluid flows between the electrodes and a borehole wall or borehole casing wall.

Downhole tool for determining flow velocity using measurements from a transducer and a plurality of electrodes

The present invention relates to a logging tool for detecting an element present in a fluid surrounding the tool downhole. The element is at least one bubble, particle or debris in the fluid, and the tool has a longitudinal axis and comprising an emitting device for emitting radiation, a lens for transmitting the radiation in a predetermined pattern of radiation, and a receiving device.

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Birkerød, Denmark

Jimmy Kjærsgaard-Rasmussen