In Reeves County, operators are faced with the challenge of drilling through the Delaware Mountain Group, which includes drilling through the Bell, Cherry, and Brushy Canyon. The notoriously troublesome Brushy Canyon requires a bit that will be able to overcome interbedded lithological challenges while maintaining a steady ROP.
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For drill bit engineers, knowledge truly is power. By analyzing everything from why bits fail to how cutters interact with different formation types, they are responding to the trend toward longer laterals with solutions that drill faster and stay in hole longer to reach total depth in fewer runs. The newest generation bit designs help achieve simultaneous improvements in rates of penetration and footage drilled through more effective hydraulics, fine-tuned cutting structures and novel cutter elements. These innovations could not have come at a better time. As average lateral lengths continue to rise, so has the demand for efficient drill bits. Longer laterals and increased drilling in North America helped the worldwide bit market grow 20 percent in 2018 to reach $3.3 billion, according to Spears & Associates.
Drilling with Bapetco, a joint venture between Shell and the Egyptian General Petroleum Cooperation, in Western Egypt involves drilling through multiple formations in the 12.25” and 8.5’’ sections. Starting off with chalky limestone in the Apolonia and Khoman formations in the 12.25” section, then interbedded formation in Abu Rawash Members (shale, limestone, and sandstone), and finishing the hole in the Bahareya in a sandstone formation in the 8.5’’ section. Typically, in this area, it takes at least one bit per section on a motor or RSS assembly to complete the well.
The Brushy Canyon is a well-known troublesome formation in Southeastern New Mexico that consists mainly of sandstone but contains some limestone lenses and thin beds of shale and chert. The inconsistency of drilling in this “ratty” formation leads to many drilling problems. The formation top is typically located at 7,000-8,000 ft. TVD and has a thickness of about 1,000 ft.
Oilfield Technology invited experts from BHGE, ULTERRA, and VAREL to share their knowledge on a variety of drill bit design topics. Ulterra weighed in to share their expertise on a variety of topics.
Air drilling technology is considered to be a cost-effective drilling method for operators – requiring minimal cleanup and disposal of fluid on the surface. Another huge benefit of air drilling is that it’s faster, but operators usually only drill the first 30-40 degrees of the curve on air.
For more than 100 years, World Oil has provided readers with the latest coverage on drilling, exploration, completion, and production of onshore and offshore oil and gas. For the last 17 years, World Oil has honored the upstream industry’s innovators and innovations. This year, World Oil received a record-setting 285 nomination submissions, and Ulterra’s SplitBlade™ technology is a finalist for the Best Drilling Technology Award.
This article first appeared in the June 2018 Edition of Oilfield Technology.
Chris Casad, Ulterra Drilling Technologies L.P., USA, discusses how new drill bit designs enhance cuttings evacuation and improve efficiency.
The push to address a longstanding problem has led to a new development in drill bit design.
The problem relates to the commonly held belief that the poor evacuation of cuttings from drilling operations can significantly limit bit performance, and ultimately the rate of penetration (ROP) – a major concern in drilling operations.
Click to download the PDF of this article.World_Oil_SplitBlade_Article_April_2018 Reposted by permission.
Ulterra Drilling Technologies (Ulterra.com) introduces its latest advancement in PDC bit engineering. The patent-pending SplitBlade™ breakthrough design improves cuttings evacuation as much as 200 percent faster than conventional PDC bits.
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