Apparatus for determining mechanical integrity of wells
OwnerClaude E. Cooke, Jr.inventor
Life of this patent
Estimating the term…
Abstract
Apparatus and method for detecting flow outside Casing in a well are provided. The flow may be detected by logging tools or by fixed equipment inside casing. An alarm system is provided for lack of mechanical integrity of a wellbore. Stationary temperature sensors are placed in contact with the inside wall of the casing. Electronic circuits are used to provide output signals sensitive to differences in temperature of the sensors.
Claims21
Apparatus for detecting flow of a fluid at a selected depth outside a casing of a well comprising:
- means for positioning a plurality of temperature sensors at fixed points in contact with the inside wall of the casing at the selected depth, the sensors being in proximity to a plane transverse to the axis of the casing;
- means for deflecting fluid flow inside the casing away from the sensors;
- and
- electronic means for measuring differences in temperature of the casing wall at the points of contact.
Apparatus for detecting flow of a fluid at a selected depth outside a casing of a well comprising:
- an inflatable packer adapted to be placed in a well having temperature sensors attached to the membrane of the packer such that the sensors may be positioned at fixed points of contact with the inside wall of the casing at the selected depth, the sensors being in proximity to a plane transverse to the axis of the casing;
- and
- electronic means for measuring differences in temperature of the casing wall at the points of contact.
Apparatus for detecting flow of a fluid at a selected depth outside a casing of a well comprising:
- a mechanically set packer or bridge plug having seals thereon, the packer or bridge plug being adapted to be placed in the well having temperature sensors affixed thereto, the sensors being positioned so as to contact the wall of the casing when the seals are activated;
- and
- electronic means for measuring differences in temperature of the casing wall at the points of contact.
Apparatus for detecting flow of a fluid at a selected depth outside a casing of a well comprising:
- means for attaching temperature sensors outside tubing and further comprising means for moving the sensors from a first position, the first position being used for positioning the sensors on the tubing at the selected depth, to a second position in contact with the inside wall of the casing;
- and
- electronic means for measuring differences in temperature.
The apparatus of claim 17 further comprising a wet connector.
Dependencies are inferred from the claim text.