Continuous Improvement on the Performance of Innovative 360 Rolling Diamond Element and Conical Diamond Element Bit led to Save 2.9 Days from Drilling in Hard and Abrasive Sandstone Formation

Author:

Ngo Vi Lan1,Khobchit Wanwarang1,Teerachotmongkol Teerawat1,James Biju1,Abbasgholipour Ali1,Kongsirinurak Thamonwan2,Tungperachaikul Thanakorn2,Amranand Sorawit2,Panmamuang Nawapol2

Affiliation:

1. Schlumberger

2. PTTEP

Abstract

Abstract Mid Nam Phong Formation in Thailand’s Sinphuhorm Field consists of hard and abrasive sandstone with unconfined compressive strengths (UCS) of 12,000–24,000 psi. Polycrystalline diamond compact (PDC) drill bits used for the 8.5-in. section through this formation were providing low rates of penetration (ROPs) and showing heavy wear, with just 50–180 meterage drilled per run. Multiple bit runs were raising drilling costs. A new drill-bit design to address these challenges is presented. Rolling cutter (RC) 616—an 8.5-in. drill bit with 16 mm cutters that rotate 360°—is holding the ROP record in offset wells, delivering 3.1 m/h compared with the average 2.15 m/h, a 44% improvement. Rolling elements use the entire circumference of the cutting edge to cut the formation, enabling them to stay sharper and longer. Conical diamond elements (CDE), which provide improved impact strength and greater resistance to abrasive wear, replaced some of the conventional cutters. Based on this result and lessons learned, a new and more robust bit design was proposed featuring 19 mm rolling cutters and conical diamond elements. To combat the damaging vibration observed in offset wells, which could further reduce ROP and increase the likelihood of premature drill-bit and downhole tool failure, a special bottom hole assembly that combined a rotary steerable system and a downhole motor was deployed to reduce stick/slip. Comprehensive simulations provided a detailed road map of drilling parameters that were used to minimize shock and vibration. The new 8.5in. drill bit and BHA drilled the entire section through the Mid Nam Phong Formation in one run and at a record ROP of 4.9 m/h—58% higher than the maximum rate achieved by the RC616 bit—saving 57.8 hours. The assembly also drilled an additional 179 meterage into the Lower Nam Phong Formation, eliminating the separate bit run that had been required in offset wells. The customer saved 2.9 days or USD 130,000 in total and a new standard of drilling performance was established. The new concept of PDC bit combining 19 mm rolling cutters and conical diamond elements expands the limit of PDC bit durability drilling hard and abrasive sandstone formation. This new type of bit can efficiently drill in those challenging geological condition reducing the drilling time and cost. This paper will discuss the application and evolution of rolling cutter bits, along with the results achieved by this bit.

Publisher

SPE

Reference5 articles.

1. M. Pak , D.Gumich, I.Zinnatullin, S.Mukkisa, I.Gaynullin.: "Unique Approach to Bit Design Coupled with Innovative Rolling PDC Cutter Sets New Performance Benchmark Drilling Extremely Abrasive Sandstone Formations, Usinsk Region Russia", paper SPE-183958-MS presented at the SPE Middle East Oil & Gas Show and Conference held in Manama, Kingdom of Bahrain, 6-9 March 2017

2. James Platt , SomasundaramValliyappan, VenkateshKaruppiah.: "Innovative Rolling Cutter Technology Significantly Improved Footage and ROP in Lateral and Vertical Gas Applications in Saudi Arabia", paper SPE/IADC-178201-MS presented at the SPE/IADC Middle East Drilling Technology Conference and Exhibition held in Abu Dhabi, UAE, 26-28 January 2016.

3. Martin Giumelli , PaulO’Shea, AlbertoMaliardi, PaulSosnowski, AaronShepherd, Sagar SudhakarSadawarte, MaurizioScordella.: "Offshore Exploration Program Benefits From Rolling PDC Cutter Technology, Timor Sea Australia", paper IADC/SPE-170532-MS presented at the IADC/SPE Asia Pacific Drilling Technology Conference held in Bangkok, Thailand, 25-27 August 2014.

4. Greg Bruton , MarkSmith, LeviMueller, RobertFord.: "Constructing Difficult Colony Wash Lateral with Innovative Rolling Cutter Technology Improves Drilling Performance", paper IADC/SPE 167956 presented at the 2014 IADC/SPE Drilling Conference and Exhibition held in Fort Worth, Texas, USA, 4-6 March 2014.

5. Lan Ngo Vi , WanwarangKhobchit, TeerawatTeerachotmongkol, ZayyanMohammad, AliAbbasgholipour, SanyapongJiratawaree, ThanakornTungperachaikul, SorawitAmranand, ApimukSoontarerat, YindeeAkeratchataphun, AdirujUdomsak, AtthawatChantimapong.: "Saving 2.2 Days from Drilling in Hard and Abrasive Sandstone Formation with Innovative 360 Rolling Diamond Element Bit Technology", Paper IPTC-21792-MS presented at the International Petroleum Technology Conference, March 23–April 1, 2021.

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