Outside casing conveyed low flow impedance sensor gauge system and method
US8555712B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | May 20, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present document describes a sensing apparatus for lowering into a well and cementing therein at a certain depth. The sensing apparatus comprises an elongated casing and a sensor device protruding from an outside surface of the elongated casing for generating measurement data and sending the data to the surface of the well using a cable extending from the sensor device along the outside surface of the casing. A flow of cement is provided between the outside surface of the casing and the well for cementing the casing in place and isolating different layers of the well. Presence of the sensor device and the cable creates an obstruction within the flow path of the cement which may result in the formation of micro-annulus around the sensor device and the cable. In order to address this problem, a plurality of fins is provided around the casing, the fins being shaped to cause a straight flow of cement received at the fins to rotate around the longitudinal axis of the casing when exiting the fins for increasing cement flow between the elongated casing and its surrounding environment to mitigate micro-annulus formation. Another means to address this problem is to provide cable attachm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.