Resultsnn Drilled 1,946 ft (593 m), 4% farther than plan required

nn Drilled an average ROP of 32.8 ft/hr (10 m/hr), 250% faster than impregnated bits, and 37% faster than the offset average

nn Saved 5.7 days of drilling time and an estimated USD 240,000

nn Attained vertical trajectory according to plan

nn Generated larger cuttings for lithology evaluation

Challengesnn Improve ROP and drilling efficiency in formation of hard anhydrites along with interbedded hard carbonates that included up to 60% concentration of chert

Baker Hughes solutionnn Heavy-set Talon PDC bit with Stabilis cutters, specifically designed by Baker Hughes’ DART™ Application Review team

nn The Baker Hughes AutoTrak V automated rotary steerable drilling system

Challenged by an application that consisted of anhydrite and hard interbedded carbonate formations with extended chert inclusions, an operator in Kazakhstan sought a bit solution that would not only provide durability, but also maintain higher speeds than that seen with diamond impregnated bits.

The unconfined compressive strength (UCS) of the formation typically ranged from 10,000 to 20,000 pounds per square inch (PSI), but would spike up to 35,000 PSI when chert was encountered. Typically, PDC bit cutters would experience excessive damage when drilling the chert, so Baker Hughes recommended its heavy-set, eight-bladed 8½-in. Talon™ high-efficiency PDC bit fortified with Baker Hughes Stabilis™ reinforced cutters to tackle the varying formations.

The Talon 8½-in. PDC bit with Stabilis cutter technology, with its stable design, durable profile and efficient cutting structure, provided the strength and speed to outpace competitor impreg bits, hybrid bits, and PDC bits with conical diamond cutters in this difficult chert formation. The Baker Hughes AutoTrak™ V automated rotary steerable drilling system (RSS) ensured the bottomhole assembly would stay on trajectory and drill a vertical hole.

The goal for the first run of the section was to drill 1,870 ft (570 m) until chert content reached 10% with a target rate of penetration (ROP) of 26 ft/hr (8 m/hr). The beginning section of 295 ft (90 m) consisted of hard plastic anhydrite. Following that was a 656 ft (200 m) section through interbedded and hard carbonate formations with chert levels of up to 60%. Total distance drilled

Talon PDC Bit with Stabilis Reinforced Cutters and AutoTrak V Automated RSS Saved 5.7 Days of Rig TimeLocation: Kazakhstan

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Planned Actual Depth  In    8,858  ,  MD  

Depth  Out  10,803  ,  MD  

8½-­‐in  Sec8on  Run1:  Talon  Bit  8½-­‐in  T508X    

5.7  Days    Rig  Time  Saved  

CASE HISTORY| bakerhughes.com

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.

© 2015 Baker Hughes Incorporated. All rights reserved. 42395 REV 08/2015

reached 1,946 ft (593 m), a 4% improvement over the plan. The rate of penetration (ROP) drilled was 32.8 ft/hr (10 m/hr), a 250% increase over previous impregnated drill bit runs, and an increase anywhere from 110% to 200% over competitor PDC type drill bits.

The Talon PDC bit also provided the added benefits of creating larger cuttings than previous impreg bit runs for better lithology identification. The bit also required less weight on bit, reducing torque and mitigating bottomhole assembly damage.

Together, the Talon PDC bit with Stabilis reinforced cutters and the AutoTrak V automated RSS saved the client 5.7 days of rig time that equated to an estimated USD 240,000.

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Baker Hughes Talon PDC bit Competitor PDC bit Competitor hybrid bit Impreg bits

Talon with Stabilis Cutters

CASE HISTORY