General Meeting - Society of Petroleum Engineers - Denver Section - September 20, 2006

SPE General Meeting

Date:              Wednesday – September 20, 2006

Speaker:            Tommy M. Warren, Tesco

Drilling with Casing - What it Can and Can't Do for an Asset

Place:             Denver Athletic Club       
    4th Floor
                                1325 Glenarm Place
                                Denver, CO 80204

Time:               11:30 am

Cost:               $25.00 ($30.00 at the door, if space is available)

Reservation Deadline:     Noon, Tuesday, September 19, 2006
                                           Register On-line or Call 303-620-9080 for reservations


Drilling with casing is an emerging technology for simultaneously drilling and casing a well. The casing is used as the drillstring – which may reduce well costs and enable problematic hole sections to be drilled. There are many situations where lost circulation, well control incidents, and borehole stability problems are directly attributed to tripping the drillstring and other situations where they prevent the drillstring from being tripped. These problems are significantly reduced by drilling with casing. Savings from reducing drillstring trips and handling times are important, but the potential to employ the technology to reduce risk and exploit reserves below troublesome formations are much more significant. 

Drilling with casing is gaining increasing acceptance in both onshore applications where entire wells are drilled with casing and offshore applications where it is used to drill selected intervals. Casing drilling opportunities range from very simple vertical intervals, where a drillable bit may be attached directly to the casing, to complex directional applications. For the latter, steerable motors or rotary steerable systems and MWD/LWD tools may be run as a retrievable drilling assembly that can be recovered from the casing and re-run as desired without requiring a drillstring trip. 

This talk reviews the current status and advantages and disadvantages of a technique that’s been used in the last few years to drill over a thousand intervals ranging from shallow surface holes using 20” casing to drilling to over 15,000 ft with 3-1/2” production tubing. 


Tommy is the Director, CASING DRILLING® Research and Engineering for Tesco Corp. He joined Tesco in 1999 after spending twenty six years with Amoco in operations and drilling research. His research has led to the publication of 60 technical papers and 35 patents. Tommy graduated from the University of Alabama with BS (1973) and MS (1976) Degrees in Mineral Engineering and was selected as a University of Alabama Distinguished Engineering Fellow in 1994.

Tommy is active in the SPE technical programs and served as chairman of the 1999 Annual Technical Conference and Exhibition, was a SPE Distinguished Lecturer in 1998-99 and is currently serving as chairman of the SPE Publications Coordinating Committee and member of the IADC/SPE Drilling Conference Program Committee. He was the recipient of the 1997 SPE Drilling Engineering Award, the 1985 SPE Cedric K. Ferguson Medal, the 1982 AIME/SPE Rossiter W. Raymond Award, and is the author of the casing drilling chapter for the upcoming SPE Advanced Drilling Engineering textbook.

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