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Volume 2, Issue 4
Product Performance Update
Diamond Edge Bit Drills Interval in One Run
In a recent application in Caddo Parrish, La., a major North American operator achieved success with a Varel Diamond Edge drill bit.
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| The 9-7/8" DE713PUX after completing the interval in just one run. |
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Challenge: The operator required a bit that would drill the Bossier Shale Formation, while passing through a known hard stringer, as quickly and efficiently as possible and maintain an acceptable rate of penetration (ROP).
Solution: Varel field engineers suggested the 9-7/8” DE713PUX, a seven-bladed Diamond Edge PDC bit equipped with power cutters, shock studs and back reaming/up drill cutters.
Results: The DE713PUX drilled to a depth of 11,070 feet through more than 2,230 feet of the Bossier Formation, reaching TD and maintaining an average ROP of 18.4 fph. The next closest offset in the area required two bits to complete a similar interval, adding the cost of
not only the drill bit, but also the resulting cost of an additional bit trip and the introduction of further hazards associated with tripping.
Field engineers performed a dull evaluation on the bit and noted the exceptional dull characteristics of the main cutting structure (pictured above).
For more information on this series, please visit our Web site.
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Varel in the News
Bit Redesign Improves Drilling Results
American Oil & Gas Reporter, September 2009
Article by Jack Burnett, Hoyle Granger and Chris Day
http://www.varelintl.com/content/includes/aogr_hoyle_and_chris_article.pdf
Managing Director Post for Ian Kirk at Expansive-Minded Downhole Products
Roustabout Energy International, June 2009
Courtesy of Energy International Magazine
http://www.varelintl.com/content/includes/roustabout_article_08.10.2009.pdf
Best Practices Emerging for ERD Wells
Hart's E & P, September 2009
Article by Dick Ghiselin
http://www.varelintl.com/content/includes/best_practices_emerging_for_erd_wells.pdf
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Downhole Products Launches New Web Site
 Downhole Products (DHP) has recently unveiled a redesigned Web site at www.Downhole.org. The site features a newly organized format that is easier to navigate. DHP Product Development Manager Andy Kirk spearheaded the project and continues to oversee the site's routine maintenance.
"We want to make certain that our information is available and accurate," Kirk stated. "This site is an extension of our company, part of our brand and our commitment to quality."
Bookmark the new site and check back often for updates. Send inquiries regarding the site to mail@downhole.co.uk.
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Downhole Products, Ltd. Enhances Reamer Shoe Line with Patent-Pending Advancement
 Downhole Products (DHP) has extended its technology leadership through modification of its already successful Pen-O-Trator™ line of reamer shoes with the inclusion of an enhanced aluminum nose with pre-stressed zones on the exterior surface.
The design modification, fueled by the request of a major international operator, assists in the breakup of the reamer shoe's aluminium nose during drill out of the shoe-track following cementing. The engineered pattern of stress zones allows the aluminum to fracture into small pieces when the drill bit encounters the inside of the nose. The smaller pieces are more easily milled, drilled and evacuated from the wellbore.
Previous reamer shoes have occasionally caused problems when large pieces of aluminum broke out and spun beneath the drill out bit, reducing penetration to a near standstill. In those cases, the PDC cutters affixed to the drill bit would sometimes get coated with heated aluminum, reducing their cutting efficiency.
Field testing of the enhanced reamer shoe has been conducted with the major operator over a 12-month period and continues to yield success.
DHP Pen-O-Trator reamer shoes have been equipped with this advancement and are available in sizes ranging from 6-5/8" to 20".
About Downhole Products
Downhole Products (DHP) specializes in the design and manufacture of engineered tubular enhancement products for the global upstream oil and gas industries. Since 1994, DHP has been developing and providing downhole solutions aimed at reducing torque and drag and improving casing running and cementing integrity. DHP is a Varel International Energy Services company. For more information, visit http://www.downhole.org.
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Varel International Announces Launch
of Compass™ Series Roller Cone Bits
 Varel International announces the commercial launch of Compass™ Series roller cone drill bits for slimhole applications. The tungsten carbide insert bits are available in sizes ranging from 3-3/4" to 7-3/8."
Compass Series bits are targeted for applications such as reduced size casing programs, horizontal drilling, re-entries, multi-laterals and coiled tubing drilling, which all require steerability, reliability and maximized rates of penetration. This series has been system engineered to perform well at low weight on bit, run longer hours and withstand high RPMs typical of motor applications.
Through the incorporation of an advanced cutting structure design and the inclusion of the highly successful High Energy™ technology suite, Varel's drill bit designers optimized the series for slimhole applications. Benefits of the design include enhanced steerability, a lower cost per foot average and reduced bit trips due to improved rate of penetration (ROP) and distance drilled.
Field tests have shown an above average ROP improvement in multiple applications. The responsiveness and durability of the bits have minimized costs associated with additional drill bit runs and tripping in areas where they have been tested.
In one slimhole application for a major operator in Western Canada, a 158.8mm Compass bit was challenged to increase meters drilled while maintaining an acceptable rate of penetration (ROP). This application requires the bit to pass through increasingly hard formations including the abrasive, sharp sands of the Cadomin/Nikanassin formations. Varel supplied the operator with the Compass CM44DMRS bit, which successfully drilled 180 meters to a total depth of 1985m. This performance netted a 19.4 percent improvement in meters drilled when compared to the closest competitor offset. Using this same competitor offset, a 31 percent improvement in ROP was realized.
For more information on this series, or to download the brochure, please visit our Web site.
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| New Marketing Materials Available
The new brochure for the Compass Series Roller Cone bits is now available for use. It can be found online and hard copies can be ordered by contacting Crystal Montanez in marketing.
The Compass Series PowerPoint presentation has also been uploaded to the Document Manager on BitNet. To access the presentation, please go to BitNet>Document Manager>Public>Marketing>Presentations.
The latest roller cone comparison charts are also available on the public Web site and BitNet. You'll find the document linked on the external roller cone Web page. On BitNet, it can be accessed through DocumentManager>Public>Marketing>Roller Cone Comparison.
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