US 9,175,559 B2 · Identification of casing collars while drilling and post drilling using LWD and wireline measurements

Abstract

Systems and methods identify and/or detect one or more features of a well casing by utilizing one or more downhole measurements obtainable by a downhole component. The one or more features of the well casing are identifiable and/or detectable from the one or more measurements associated with one or more properties of the one or more features of the well casing. The one or more measurements for indentifying and/or detecting a presence and/or a location of the one or more features of the well casing include sonic measurements, nuclear measurements, gamma ray measurements, photoelectric measurements, resistivity measurements and/or combinations thereof.

Claims17

Dependent claims

A system for identifying a casing collar joint of a well casing located within a wellbore, the system comprising:

a downhole component associated with the wellbore, wherein the downhole component is configured to obtain one or more sonic measurements associated with the casing collar joint of the well casing via (i) transmitting sound waves towards the well casing and (ii) receiving sonic waves reflected back from the well casing, and
a controller configured to identify a location of the casing collar joint based on a sonic slowness time coherence projection, the controller configured to generate a slowness time coherence plane from said one or more sonic measurements and to identify the location of the casing collar joint by a lack of coherence in the slowness time coherence plane.

Dependencies are inferred from the claim text.

Facts

Application

13/122,127Filed 2 Oct 2009 · us provisional application

Priority

3 Oct 2008

Published

US 2011/0290011 A11 Dec 2011

Granted

3 Nov 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

E21B 47/09
Survey of boreholes or wells: locating or determining the position of objects in boreholes or wells , e.g. the position of an extending arm;…
E21B 17/08
Couplings; joints: casing joints
E21B 47/12
Survey of boreholes or wells: means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the…
E21B
Earth or rock drilling

Identification of casing collars while drilling and post drilling using LWD and wireline measurements

Life of this patent

Identification of casing collars while drilling and post drilling using LWD and wireline measurements

Life of this patent

Abstract

Claims17