C & P: The Starting Point

Speaker Olli Coker
Altus Well Experts, Inc. Mr. Coker earned a BS Chemistry from the University of Arkansas in 1974.  He was an active duty USAF pilot from 1974 – 1980, flew KC135 tankers during Vietnam and later posted to EC135 Flying Command Post.  Mr. Coker began his oilfield career in 1980 with ...


Altus Well Experts, Inc.



Mr. Coker earned a BS Chemistry from the University of Arkansas in 1974.  He was an active duty USAF pilot from 1974 – 1980, flew KC135 tankers during Vietnam and later posted to EC135 Flying Command Post.  Mr. Coker began his oilfield career in 1980 with Phillips Petroleum as a drilling engineer in the Texas Panhandle and Permian Basin.  During this time he also taught at Odessa College, School of Drilling Technology while stationed in the Permian Basin.  Next, he transferred from the Permian Basin to the North Sea for Phillips Petroleum and worked out of Norway and U.K.  Upon completion of his North Sea rotation he was assigned to Houston with the Conoco Wells Technology division specializing on the use of Drilling and Computers.  During this assignment, he also returned to school and earned a MS Petroleum Engineering from Texas A&M in 2002.  Last posting within ConocoPhillips was to the Global Well Technology Group where he worked on  drilling, well design, computers, managed pressure drilling, and wellbore positioning.  During his time within the Phillips/ConocoPhillips organization he contributed to Phillips’ first horizontal land well, designed Phillips’ first offshore horizontal, helped design their first offshore and subsea multi-lateral well, and implemented their first use of managed pressure drilling (MPD).  Mr. Coker chaired the first MPD conference; he also authored the ConocoPhillips Wellbore Positioning Manual and  co-authored the ConocoPhillips Casing and Tubing Design Manual.  In 2009, Mr. Coker retired from ConocoPhillips and went to Altus Well Experts as a consultant working in thermal analysis and stress analysis for wellbore casing and tubing design.


Full Description
As engineers we all know that stress and strain calculations must be based on a difference between an initial and final condition pressures, temperatures, axial and torsion conditions).  Most engineering focuses heavily on determining the final condition and assumes that we know the initial condition completely.  For oil and gas wellbore design that is not true.  We often make inappropriate guesses at the undisturbed earth temperature profile (UDT) from only two points (or even sometimes less!) and them assume that the UDT is the initial condition temperature.  This is a dangerous and false assumption.  Disasters have occurred as a result of ignoring the initial condition.  Parts of the wellbore can be either over-designed (costly) or under-designed (dangerous).  This talk is focused on the reasons and methods for determining accurate initial conditions and their usefulness.
Organizer Jonathan Godwin

When?

Wed, Sep. 26, 2012
11:30 a.m. - 1 p.m. US/Central

How Much?

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Where?

Greenspoint Club
16925 Northchase Drive
Houston, TX 77060

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