METHOD TO DETECT DRILLING DYSFUNCTIONS - EXXONMOBIL UPSTREAM RES CO

Title:

METHOD TO DETECT DRILLING DYSFUNCTIONS

Document Type and Number:

WIPO Patent Application WO/2014/078027

Kind Code:

A3

Abstract:

Methods and systems for detecting downhole bit dysfunction in a drill bit penetrating a subterranean formation comprising receiving a plurality of drilling parameters characterizing a wellbore drilling operation and calculating bit aggressiveness (μ) at each of a plurality of points during drilling, wherein each point corresponds to time, depth, or both. A depth-of-cut (DOC), time derivative of bit aggressiveness (µ̇), calculated as dμ/dt, or both, is calculated at each of the plurality of points. A two-dimensional data representation of the plurality of points, comprising μ in one dimension and DOC, μ̇, or both, in another dimension is created. Data features are extracted from the two-dimensional data representation and downhole bit dysfunction is identified by comparing the extracted data features with predefined criteria.

Inventors:

WANG LEI (US)
BAILEY JEFFREY R (US)
O'DONNELL BRIAN J (US)
CHANG DAR-LON (US)
PAYETTE GREGORY S (US)

Application Number:

PCT/US2013/066210

Publication Date:

July 10, 2014

Filing Date:

October 22, 2013

Export Citation:

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Assignee:

EXXONMOBIL UPSTREAM RES CO (US)
WANG LEI (US)
BAILEY JEFFREY R (US)
O'DONNELL BRIAN J (US)
CHANG DAR-LON (US)
PAYETTE GREGORY S (US)

International Classes:

E21B7/06

Foreign References:

US20120123757A1	2012-05-17
US20100032210A1	2010-02-11
US20090250264A1	2009-10-08
US20060149478A1	2006-07-06

Other References: