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Innovating While Drilling®

Schlumberger announces new dual telemetry service to help reduce influence from drilling noise

The first day of the 2020 IADC/SPE International Drilling Conference in Galveston, Texas, saw Schlumberger launch a new dual telemetry drilling service, xBolt G2, that it says enables operators to switch from electromagnetic mud pulse and dual telemetry modes while drilling, reducing influence from drilling noise and potentially reducing lost rig time. In this video with DC following the product’s launch, Shadi Mussa, Global Product Champion at Schlumberger, speaks about the benefits the system may provide in well placement and geosteering.

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Stena Drilling: A journey from zero MPD capability to fully integrated, ‘owned and operated’ MPD service

Having functionally identical systems across MPD fleet and taking collaborative approach to develop procedures cited as key success factors By Nick Ward and Stuart Wyse, Stena Drilling Responding to a competitive deepwater rig market, as well as operators’ increasing requests for managed pressure drilling (MPD) capability in rig tenders, Stena Drilling identified a requirement to establish MPD capability within its deepwater fleet and, in February 2016, sanctioned the purchase and integration of two deepwater MPD systems. Since then, the company has successfully utilized both systems to drill seven deepwater MPD exploration and appraisal wells across multiple regions and for multiple operators. Following the successes of the first two MPD systems, a third system was approved in 2019, with three additional ...

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Gyro-while-drilling technology enables wellbore collision risk management in ERD application

Gyroscopic surveying system combined with advanced RSS helps operator to drill new well to access bypassed oil from aging Gulf of Thailand field By Manchukarn Naknaka and Praisont Prasertamporn, Mubadala Petroleum; Adrián Ledroz and Jayaneethe Naranasamy, Gyrodata; and Kesavan Ramasamy, Baker Hughes In complex oilfields with diminishing production values, accessing untapped reservoir areas is one method of improving overall field economics. Operators typically drill many wells in the same field, creating a risk to safety and production when attempting to drill a new prospect well near the existing ones. As the risk of wellbore collision increases, the value of drilling the well effectively decreases, and relying on MWD surveys opens the operator up to additional challenges with the quality of ...

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In evaluating the business case for implementing MPD, well design optimization is too often overlooked

Dynamic formation mapping and design kick tolerance among critical enablers to fully realize benefits of MPD By Oscar Gabaldon, Romar Gonzalez Luis, Patrick Brand, Sherif Saber, Anton Kozlov and William Bacon, Blade Energy Partners; and Catherine Sugden, Sugden Consulting Inherent to the unpredictable nature of high-pressure, high-temperature (HPHT) reservoirs and exploratory wells, especially in deepwater, are increased operational costs due to nonproductive time (NPT) and operational problems. Typically considered after the initial well design process, managed pressure drilling (MPD) techniques are well recognized as a cost-effective approach to increasing the likelihood of achieving well and cost objectives for challenging wells with narrow windows. However, the implementation of MPD early in the project life cycle offers further potential savings that many ...

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Surge and swab during drill pipe connections on floaters may affect pressure windows in calm weather

Significant rig-heave induced pressure variations revealed in study of drillship offshore Brazil, highlighting need for simulation tool for harsh conditions By John-Morten Godhavn and Banzi Olorunju, Equinor; Dmitri Gorski, Martin Kvernland and Mateus Sant’Ana, Heavelock Solutions; Ole Morten Aamo and Sigbjørn Sangesland, NTNU During drilling and completion, the downhole pressure in a well should be kept lower than the fracture pressure and higher than both the pore pressure and wellbore collapse pressure. Falling below that lower limit pressure could lead to wellbore stability challenges and a possible undesired influx of hydrocarbons into the well, while exceeding the upper limit could cause the well to fracture, resulting in costly mud losses. All of this means an increase in nonproductive time (NPT) ...

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A novel approach of analyzing well sections as MPD candidates

Simplified technique helps to understand relationship between mud weight and surface-applied choke pressure, impact on drilling hydraulics design By Hasan Malik, UPDC-Aramco KSA Among the list of unconventional drilling techniques that include a combination of single-phase and multiphase mixtures of gas and liquid or dual density of two single-phase fluids, managed pressure drilling (MPD) is by far the most commonly used technique today. Throughout the process of MPD, the change in the equivalent mud weight (EMW) value is carried out by manipulating the annular pressure from a choke on surface. MPD utilizes a mud weight whose hydrostatic head is lower than the formation pressure under static conditions. Lightweight fluid is the common theme in both underbalanced drilling (UBD) and MPD. ...

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Wellbore-shielding fluid additive during drilling, completions can help to boost potential production rates

Testing of cores from Venezuela, Colombia, Norway and Saudi Arabia confirm reduction in formation damage By Rodney Uchytil, Paul Craddock and Justin Mclellan, Impact Fluid Solutions While the production zone is typically the responsibility of the reservoir engineering team, taking proactive steps during drilling and considering the full life cycle of a well have been shown to minimize formation damage, thereby significantly enhancing potential production outcomes. Reducing damage, or skin effect, in mechanically weak and structurally complex reservoir geologies is critical to maximizing production and enhancing the net present value of an asset. Tightening margins, however, have prompted the universal strategy to reach the payzone and put the well on production as quickly and as economically as possible. Typically, that ...

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Electrically powered, open-platform wired drill pipe technology headed for commercial launch this year

Field tests show system can deliver stable downhole power while communicating at rate of 56 kB/sec during drilling By Ian Silvester, Reelwell Over the years, the drilling sector has experienced generational and innovative technologies. These include M/LWD tools, PDC bits, rotary steerable systems, high-specification drilling rigs and automation. Enabling next-generation drilling technologies by using a powered and wired enabled drill pipe string is arguably the next step-change in drilling performance. However, the market perception surrounding the wired drill pipe has historically centered around reliability and cost issues, alongside the positive benefits the technology can produce. With this in mind, extensive field tests have been carried out on Reelwell’s DualLink technology in Norway and the US. The technology, which is expected ...

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Statistical analysis helps to quantify benefits of new bit technology

Rather than rely on individual gut instinct, industry should look to trends from large-scale data sets to understand value and performance of new drill bits By Chris Gooch, Ulterra The drilling industry has relied too long on comparative experience and “gut instinct” when assessing new products and technologies and how they affect drilling performance. This is a problematic approach because applications vary wildly, even on the same pad or location, and no two wells are ever really drilled in the same way. The holy grail of the drill bit segment is the like-for-like test, whereby the engineer will find the closest offset well comparison in terms of matching all the different factors that define an application. However, this is next ...

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Chevron finds new ways to mix automation content into competency assurance programs

Automation has been a key driver in the pace of change for drilling operations in recent years, but the adoption of new technologies can unveil complex challenges, particularly in assuring worker competency. Learn more in this video with Kevin Taylor, WellSafe System IT SME at Chevron...

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