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High-cost subsea sector faces test of economics


Risk, cost and safety and environmental concerns impact every aspect of oil and gas recovery, but these challenges are especially daunting in the subsea sector. Here, as operators drive into increasingly deeper reservoirs and high-pressure, high-temperature (HPHT) fields, a single failure can be catastrophic.

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PDC bit uses staggered cutter configuration to take energy from vibrations to drill ahead


Excessive vibration caused by unrestrained lateral forces in directional wells can wreak havoc on drilling operations. In addition to reducing ROP, directional control (i.e., steerability) and overall drilling efficiency, torsional vibration at the bottomhole assembly (BHA) is often pegged as the source of a number of costly issues, including broken cutters, dull bits, trips and even damaged formations. To address such vibration-related problems, Ulterra Drilling Technologies has developed CounterForce, a patent-pending technology with a cutter orientation design inspired by the machining industry. It features a staggered cutter configuration capable of improving mechanical specific energy by dampening vibration, reducing bit reactive torque and redirecting force back into the rock. The cutting structure features pairs of cutters with opposing side rakes (angles), which allows the bit to harness reactive forces from the formation to counter the lateral forces from the drillstring.

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From the President/CEO: Through tough times, IADC will maintain focus on safety, crew competence, cost reductions

Stephen Colville, IADC President/CEO

Our industry is facing the most difficult of times. Internally within your companies, shareholders, executive boards and senior leadership are asking you to do more with less. Outside, customers are beating you over the head on costs and performance metrics, while competitors are nipping at your heels and regulators continue to crack the safety whip.

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Deepwater, high-pressure completion tubular maximizes combined-load capabilities


This article discusses a two-year comprehensive effort to design, test, manufacture and deploy a new high-pressure completion tubular for Chevron’s deepwater Gulf of Mexico operations. The major challenge was to design, test and manufacture a subsea completion string that would provide efficient hydraulics during the fracturing operations while ensuring mechanical and pressure integrity.

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HSE&T Corner


The use of chemicals is fundamental to all economies, including the oil and gas drilling industry. Hazardous chemicals have the potential to cause injury to employees who work with and around them and, in a worst-case scenario, exposure to hazardous chemicals can be fatal. For example, in 2007, an employee died from an apparent chemical overexposure while working on a drilling rig. When the employee began showing signs of dizziness, the employee was sent to the doghouse while the crew continued to run more than 25 stands of pipe in the hole.

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D&C News


Bentec recently announced three multimillion-dollar contracts. Under the first contract, the company will build its first complete drilling rig for offshore operations in the Caspian Sea, off the coast of Azerbaijan. The rig will be built for Nobel Oil. The offshore drilling package will include the company’s recently launched 750-ton top drive and new 3,000-hp drawworks.

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D&C Tech Digest


Subsea Services Alliance, the collaboration among Helix Energy Solutions Group, OneSubsea and Schlumberger, has announced the first joint technology project between OneSubsea and Helix to engineer and manufacture a 15,000-psi intervention riser system. This technology advances the alliance’s objectives to offer well intervention solutions to service the increasing number of high-pressure wells in the subsea environment. The system, which will be available on a rental basis in mid-2017, is being engineered and built at OneSubsea facilities in Leeds, UK

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On-command reamer allows for digital confirmation of multiple activations, blade status

The GaugePro Echo on-command digital reamer is downlink-activated and can be activated and reactivated as many times as necessary. This enables selective reaming of problem formations and sidetrack windows to facilitate open-hole sidetracks. The reamer also provides real-time confirmation of blade status and position.

Expandable reamers were developed to improve efficiencies and reduce risk when drilling through problematic formations in deepwater and other offshore wells. While mechanical and hybrid expandable underreamers have been used for some time in offshore applications, they have not provided the communication, operational reliability and flexibility that operators desire in high cost-per-foot drilling applications.

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From the Chairman: Ensuring crew competency through WellSharp prepares industry for future growth in the next upturn


We are surrounded with warning systems as we go through our everyday routines. From those that are small – an alarm to wake us up in the morning, the low battery warning on our computers, the engine warning light on our cars – to the large, like tornado, hurricane and severe storm warnings. In all cases, we have, or should have, the knowledge, skills and abilities to react to the warnings we receive.

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