CASE HISTORY | bakerhughes.com Baker Hughes Directional Drilling Systems Approach Saves Operator USD 4 million Location: Congo, West Africa Results nnSaved USD 4 million total in both 12¼-in. and 8½-in. sections compared with average offset performance nnCut total bit trips by 50% nnImproved nnReduced average ROP by 65% offset average NPT by 80% Challenges nnDirectional, J-type wells with TD at approximately 3,000 m (9,843 ft) MD An operator in Congo, West Africa, drilled for more than 2 years with competitor bottomhole assemblies (BHA). Over the course of four wells, multiple trips, and various suppliers, the operator experienced steerability, vibration, and tool-failure issues. The challenge was to find an effective balance between steering control and drilling efficiency. Baker Hughes recommended an integrated solution using its Kymera™ hybrid drill bits, AutoTrak™ X-treme™ rotary steerable system (RSS), and CoPilot™ measurement while drilling (MWD) system. The Kymera bit technology combines roller cones and PDC fixed cutters into a single, patented design to reduce drilling time in the most complex applications. In this case, the Kymera bit was used to tackle high vibration and stick-slip issues for better speed and fewer bit trips. The AutoTrak X-treme RSS, a breakthrough technology that enables operators to steer wellpaths with more power at the bit, was used to keep the rate of penetration (ROP) optimized during directional drilling. As an added economic benefit, a CoPilot sub was added to the BHA, allowing service experts to monitor downhole vibrations in real time. nnAlbian and Cenomanian formations with highly interbedded, hard carbonates layers nnPrevious runs using competitor bits had up to 13 BHA failures, 17 days of NPT, and steerability loss due to severe vibration Baker Hughes solution Having full, two-way communication with the steering unit, the AutoTrak X-treme system precisely steered the highly complex trajectory without sacrificing ROP, even when the torque was high. Reservoir navigation was performed and, due to precise steering, the well’s total depth (TD) of 9,679 ft (2,950 m) was extended by 656 ft (200 m) to a measured depth (MD) of 10,276 ft (3,132 m). nnIntegration of a Kymera drill bit, AutoTrak X-treme, and CoPilot MWD system nnBit and BHA collaborative systems approach developed by DART™, the Drilling Application Review Process Team CASE HISTORY The combination of a well-suited Kymera bit, additional power from the AutoTrak X-treme system, and real-time interpretation of the CoPilot weight-on-bit data optimized the weight transfer to the bit, improving ROP through through both the 12¼-in. and 8½-in. sections. The average competitor ROP across four 12¼-in. sections was 20 ft/hr (6 m/hr), while the Kymera bit drilled 39 ft/hr (12 m/hr). In the 8½-in. section, the Kymera bit drilled at a rate of 23 ft/hr (7 m/hr), beating the competitor average of 16 ft/hr (5 m/hr) by 40%. Overall, the Kymera bit outpaced competitor ROP on average by more than 65%. An integrated solution of Baker Hughes technologies and expertise reduced bit trips from 10 to 5 and cut nonproductive time (NPT) by 80%, saving the operator USD 4 million. Disclaimer of Liability: This information is provided for general information purposes only and is believed to be accurate as of the date hereof; however, Baker Hughes Incorporated and its affiliates do not make any warranties or representations of any kind regarding the information and disclaim all express and implied warranties or representations to the fullest extent permissible by law, including those of merchantability, fitness for a particular purpose or use, title, non-infringement, accuracy, correctness or completeness of the information provided herein. All information is furnished “as is” and without any license to distribute. The user agrees to assume all liabilities related to the use of or reliance on such information. BAKER HUGHES INCORPORATED AND ITS AFFILIATES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, EXEMPLARY OR CONSEQUENTIAL DAMAGES FROM ANY CAUSE WHATSOEVER INCLUDING BUT NOT LIMITED TO ITS NEGLIGENCE. © 2014 Baker Hughes Incorporated. All rights reserved. 40330 05/2014