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March/April

North Sea HPHT case study: Monitoring of underreamer function status confirms in-gauge hole

Monitoring system helps Total to improve certainty around underreamed hole diameter By Tom Huggett, National Oilwell Varco; Mohammad Alahmad and Oliver Eatough, Total Underreaming tools are frequently needed in challenging applications, such as to facilitate running expandable liners, but underreaming operations can frequently leave uncertainty on final hole diameter. National Oilwell Varco (NOV) developed the IQ underreamer monitoring system to remove this uncertainty by monitoring cutter block position, wear and vibration, data that could be used in post-run drilling analyses as part of an optimization plan for future wells. The system also records downhole drilling dynamics at the underreamer, which means the system can determine, via memory data, the actual underreamer expansion size at any point during the run, allowing ...

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Intervention equipment, planning can mitigate complexities that come with multiwell pad spacing

With high-density well spacing, additional considerations are needed around equipment placement and how one well affects other wells on the same pad By Joe Coleman and Cliff Meade, Wild Well Control An intervention operation on one well that goes poorly can affect adjacent wells and cause an even greater problem. Well spacing on multiwell pads becomes an issue that concerns equipment placement footprints. Hot Tap, Valve Drilling and Freeze services can be used for gaining well access and placing temporary mechanical barriers when circumstances do not allow for conventional intervention methods. Freeze Operations Freeze operations can be used in compact spaces and are beneficial for use on multiwell pads. Freeze services have been used for many years to place a ...

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Hybrid system taps benefits of both MPD, underbalanced drilling, opens new horizons in southern Pakistan

Application of hybrid system allows operator to drill through, case off complicated sequence of formations without need for additional casing string By Qasim Ashraf, Weatherford International The northern Pothohar plateau of Pakistan is known to bear significant oil and gas reserves. Due to severe geological uncertainties, the area exhibits the most challenging drilling conditions in the region. The subject field is located in the southern part of the Pothohar plateau. Drilling challenges of severe loss circulation, high-pressure water influxes, low rate of penetration (ROP), simultaneous loss/gain issues and depleted reservoir formations are the most common problems experienced in the area. The subject well was a reentry well where the objective of the operator was to drill and produce the deeper ...

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Drilling & Completion Tech Digest

Transocean set to upgrade 5 additional floating rigs with Automated Drilling Control systems Transocean has entered into an agreement with Equinor to license and install Automated Drilling Control (ADC) systems on four high-specification, harsh-environment rigs on contract in Norway and a fifth semisubmersible that is expected to commence operations in the Norwegian sea this summer. The Transocean Enabler was previously equipped with the ADC system in 2017 and has delivered tangible improvements in overall drilling efficiency that have led to more cost-effective wells for Equinor. Further, the system has demonstrated improvements in well integrity, while enhancing safety and operations assurance. In addition to the Transocean Enabler, the upgraded floaters in Transocean’s fleet will include the Transocean Spitsbergen, Transocean Norge, Transocean ...

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Well maintained

Automated, integrated equipment, more powerful diagnostics and wireline renaissance boost intervention efficiency By Katie Mazerov, Contributing Editor As sure as the sun rises and sets each day, all oil and gas wells will, at some point, need an intervention to maintain or boost production. From basic drill-out and cleanout operations using wireline, coiled tubing or a snubbing unit, to full-scale workovers to remove and reinstall the wellhead to replace downhole equipment, well intervention is a fact of life in the oilfield. It is also becoming more critical as operators drill deeper and longer in hotter and more pressurized environments. Equipment that is often automated and integrated, specialty services to meet the rigor of today’s well environments, new wireline applications, and ...

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News Cuttings

IADC WellSharp Plus to integrate human factors into technical well control training IADC is preparing to launch WellSharp Plus, a new accreditation program that fully integrates human factors (i.e., crew resource management) into technical well control training and specifically targets experienced personnel. The primary goals of this new program are to reduce the potential for human error and to contribute to the competence of personnel during drilling operations. Throughout 2018, a workgroup comprising course designers, human factors experts and other stakeholders worked together to develop a human factors curriculum, program and course requirements, as well as a new “train-the-trainer” course for human factors instructors. Rather than creating an isolated human factors course or training module, course designers recognized the value ...

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Drilling & Completion News

Noble to buy newbuild jackup to work for Aramco Noble Corp has exercised an option for the purchase of a second newbuild Gusto MSC CJ46 design jackup from PaxOcean for $83.75 million. Like the Noble Johnny Whitstine jackup, which was purchased in September 2018 in connection with a Saudi Aramco contract, this newbuild, to be named the Noble Joe Knight, was built at the PaxOcean Graha shipyard in Batam, Indonesia. The rig is built for operations in moderate drilling environments and is capable of operating in water depths of up to 375 ft, with well depths of 30,000 ft. Enhanced drilling capabilities are supported by a modern drilling control system, along with a versatile cantilever skidding system and two blowout ...

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Killalea retires from IADC with legacy of leadership and innovation

Achievements over 28 years include pioneering of World Drilling, ART Committee and leadership of Drilling Contractor magazine, multimedia growth By Sarah Junek, Associate Editor After 28 years with IADC, Mike Killalea is retiring in March, leaving a legacy of mentorship and innovation. Mr Killalea joined the association in 1991 as Associate Editor of Drilling Contractor magazine and retires as Group Vice President and Editor/Publisher. His years at IADC reflect an unending energy for chasing good opportunities and trusting one’s instincts. Mr Killalea’s life has been marked by combined passions for science and the written word. After his service in the US Navy, Mr Killalea earned a degree in chemical engineering from the University of California at Davis in 1980. A ...

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Human factors integration puts spotlight on context first, the individual second

By Sarah Junek, Associate Editor Human performance is an outcome of what someone does, which is influenced by not just one human factor but many. An integration of the factors of human error – plant, process and people – will determine a particular outcome. Equipment might have a good/bad design feature, a procedure might not be explained or hidden in a manual that is too thick, and fatigue or organizational culture might influence the final result. Every situation and job site is different, so it’s important to look at how human factors can be integrated and determine how they influence each other in a particular decision, Sandra Adkins, Global Wells Organization Safety Advisor for Human Performance at BP, said at ...

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Industry must commit to next generation just as it’s committed to innovation, safety

By Jason McFarland, IADC President The beginning of the year represents a fresh start, a time to reflect on where we have been and where we are going. At IADC, this is exactly the approach that we take at the start of each new year; constantly evaluating what we offer to our members to ensure that it works for their needs and delivers value. As we look forward into 2019, I see a lot of opportunities for IADC. Specifically, we are contemplating ways to reach the next generation of oilfield workers and get them involved in IADC early in their careers. The prolonged downturn has a way of making those who would consider a career in oil and gas think ...

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