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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 4. Отображено 4.
02-10-2013 дата публикации

Signal and power transmission in hydrocarbon wells

Номер: GB0002500849A
Автор: JOHANNESSEN KJETIL [NO], JOHANNESSEN KJETIL, KJETIL JOHANNESSEN
Принадлежит:

One aspect relates to a method of installing a transmission system in a hydrocarbon production well. The transmission system is operable for transmitting power and/or control signals down the well or for transmitting data signals back up the well. The well comprises a main well bore, a production tubing inside the main well bore and a branch off the production tubing. The branch comprises a side track tubing. The method includes: providing a sensor and/or load assembly in the branch; installing a first inductive coupler of an induced current transmission arrangement around the production tubing in the main well bore, and connecting the sensor/load assembly to the first inductive coupler via a communication link. Another aspect relates to a hydrocarbon production well installation.

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Номер записи: 1
30-10-2013 дата публикации

Improved electro-magnetic antenna for wireless communication and inter-well electro-magnetic characterization in hydrocarbon production wells

Номер: GB0002501636A
Автор: JOHANNESSEN KJETIL [NO], JOHANNESSEN KJETIL, KJETIL JOHANNESSEN
Принадлежит:

Methods, a system and antennas are provided for transmitting or receiving signals from a hydrocarbon production well. The well comprises a well bore formed in a formation, a production liner/tubing extending axially along the well bore, and an inductive coupling disposed around the liner/tubing. The liner tubing is electrically coupled to the formation at two axially separated locations and is electrically isolated from the formation between the locations. For transmitting, an alternating current signal to the inductive coupling to induce a current in the liner/tubing, the liner tubing forming a dipole antenna that generates an electromagnetic radiation signal propagating through the formation. For receiving, the dipole antenna is exposed to an electromagnetic radiation signal propagated through the formation which induces an alternating current signal in the tubing and the current signal is detected at the inductive coupling.

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Номер записи: 2
16-01-2013 дата публикации

Using distributed acoustic measurements for surveying a hydrocarbon producing well and for compensating other acoustic measurements

Номер: GB0002492802A
Автор: JOHANNESSEN KJETIL [NO], JOHANNESSEN KJETIL, KJETIL JOHANNESSEN
Принадлежит:

A method of surveying a hydrocarbon producing well comprising detecting propagation characteristics of acoustic signals travelling along the well by sampling the acoustic field at spaced locations along the well, and using the detected propagation characteristics to survey physical characteristics of the well and/or to determine data for suppressing a part of the acoustic field originating within and being guided along the well in order to detect acoustic signals originating externally to the well. The sampling may be performed using a distributed fibre optic acoustic sensor. The acoustic signals may be generated by normal hydrocarbon production processes. The propagation characteristics may be sound propagation velocity along the well or acoustic attenuation along the well. Various characteristics of the well may be detected using this approach, such as operation of valves, leaks, cement bonds, slugging etc. Different acoustic propagation modes may be identified.

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Номер записи: 3
26-12-2012 дата публикации

Flow control device and flow control method

Номер: GB0002492292A
Автор: JOHANNESSEN KJETIL [NO], JOHANNESSEN KJETIL, KJETIL JOHANNESSEN
Принадлежит:

A method and apparatus is disclosed for controlling the flow of fluid in oil and/or gas production, involving a control device or an autonomous valve (2) operating by the Bernoulli principle and comprising a moveable disk or body (9) provided within a housing (4) for opening and closing said valve (2), involving use of a material (24) within the valve (2) that changes its properties as to shape and/or volume and/or elastic modulus when exposed to a chemical substance contained in the flow of fluid and thus altering said flow of fluid.

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Номер записи: 4