| Patent Number |
Title Of Patent |
Date Issued |
| 6856575 |
Monitoring a microseismic event |
February 15, 2005 |
| A method of monitoring a microseismic event includes detecting the event to produce a first signal dependent on the event. The first signal includes noise at a frequency of, for example 50 Hz. A first sample of the first signal is taken. Then a second sample of the first signal is taken, |
| 6823936 |
Fluid flow control apparatus |
November 30, 2004 |
| A first passageway (17) provides a first fluid flow path, in a well between a first zone (9) and a, common region (26). A second passageway (23), outside the first passageway (17), provides a second fluid flow path; between the second zone (10) and the common region (26). The first p |
| 6817416 |
Flow control device |
November 16, 2004 |
| A flow control device comprises an outer sleeve having an outer sleeve wall and at least one aperture through the outer sleeve wall; a inner sleeve having an inner sleeve wall and at least one aperture through the inner sleeve wall; and means for providing relative sliding movement of th |
| 6761222 |
Packer system |
July 13, 2004 |
| Packers are expandable sealing devices used to seal off zones in a well. Packers are expanded to seal the bore of the well by means of expansion fluid supplied via individual pipelines. However, packers near the top of the well have to accommodate all of the pipelines for packers below. |
| 6644848 |
Pipeline monitoring systems |
November 11, 2003 |
| An oil pipeline, which connects a Christmas tree at its lower end to an oil rig at its upper end, is fitted with a stainless steel tube sheathed telecommunications grade optical fiber, forming part of a distributed temperature measurement device, such as to be in thermal contact with the |
| 6561043 |
Oil well flow meter with circumferentially extending pocket |
May 13, 2003 |
| A flow meter for use in an oil well has a central bore region in which an annular tube is fixed co-axially with the central bore region by a ring, which also seals the gap between the inner bore of the central bore region and the tube at its downstream end, thus forming a pocket open to |
| 6555807 |
Sensing strain in hydrocarbon wells |
April 29, 2003 |
| An apparatus for sensing strain applied to a region of a hydrocarbon well comprises an optical fiber in communication with the region. The optical fiber is responsive to strain applied to the region and to a light signal transmitted through it, in order to produce a sensing light signal |
| 6450257 |
Monitoring fluid flow through a filter |
September 17, 2002 |
| It is desirable to be able to monitor the condition of a filter in a fluid flow system, for example a sandscreen 3,4 in a fluid well. The invention provides monitoring apparatus including an optical fibre 6 having a pressure sensor 7. Pressure is exerted on the sensor, by fluid flowing |
