Steerable Motors Hold Out Against Rotary Steerables

Warren, T.M.

doi:10.2118/104268-ms

Cited by 15 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Once a correction is completed, a straight section can be drilled at higher ROPs since the motor makes use of both rotary and hydraulic horsepower at the bit face. This clear mechanical advantage means that any competing products must ultimately make use of a similar hydraulic power section to keep pace with drilling motors in long tangent sections where borehole trajectory corrections are short or are unnecessary (Warren, 2006).…”

Section: Mud Motorsmentioning

confidence: 99%

Controlling Well Path Trajectory with Rate of Penetration Modulation

Farley

Maranuk²,

Hronek³

et al. 2011

All Days

View full text Add to dashboard Cite

The majority of footage drilled directionally is achieved by using bent-housing, positive displacement motors. This established technology uses oriented drilling intervals to maintain well trajectory. These intervals can be difficult and time consuming in many drilling environments; however, the economic advantages of this system often preclude the use of more capable rotary steerable assemblies. Operators have long needed a system that fills the widening gap between the two technologies.A new system of wellbore directional control has been developed that uses continuous string rotation above a positive displacement motor and bent sub. Path deviation is achieved by brief variations in the rate of penetration (ROP) that occur once during each rotation of the bent sub. Bit advance is increased during each rotation causing the bit to drill faster in the targeted direction. This directed variation in ROP allows manipulation of hole trajectory while the bent housing and drillstring are continuously rotating. Steering is accomplished by managing pressure fluctuations within the drillstring, creating slight oscillations in the flow rate through the mud motor. These controlled fluctuations in flow rate allow variations in drilling parameters to steer the well in any targeted azimuth.The goal of this system is to eliminate all oriented drilling in applications up to 3 degree per 100 feet by employing a low risk, low cost method that maximizes ROP and hole cleaning. At the Gas Technology Institute (GTI) Catoosa Test Facility in Oklahoma, drilling tests yielded successful well trajectory manipulation, delivering up to 3 degree per 100 feet of controlled directional performance in both 6 1 / 8 " and 8 1 / 2 " hole diameters. Because a standard bent housing assembly was used, oriented drilling was always available as needed. This allowed a redundancy in directional control (oriented or rotary), widening the operational scope and technical capability of the system.

show abstract

Section: Mud Motorsmentioning

confidence: 99%

Controlling Well Path Trajectory with Rate of Penetration Modulation

Farley

Maranuk²,

Hronek³

et al. 2011

All Days

View full text Add to dashboard Cite

show abstract

“…The impact of the technology to the drilling process has been recognized within the industry 4,5 Push-the-bit RSS used steers by using hydraulically actuated pads to push against the side of the wellbore, thus displacing the tool and the bit in the direction desired. The Bias Unit contain three pads sequentially pushing against the side of the borehole as the drillstring rotates, while the central control valve remains stationary.…”

Section: Application Of Rotary Steerable Technologymentioning

confidence: 99%

Utilization of Rotary Steerable Technology for Field Development and Drilling Shallow-TVD Horizontal Wells

Peytchev¹,

Crighton²,

Upadhyay³

et al. 2010

IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition

View full text Add to dashboard Cite

Cairn Energy India Private Limited (CEIL) started development in Mangala field with aggressive target of drilling 60-70 wells/year (7days/well). Therefore, the focus was to reach high drilling efficiency which will ultimately reduce the well cost. Some of the challenges faced were placing wells in greatly faulted zones, high uncertainty in shallow TVD reservoir, requirement of tangent for installation of ESP, smooth hole to avoid problem running screen and collision risk due to closely spaced wells. RSS was generally used only in complex, high-cost offshore projects where the savings realized were significant. The industry has been slower to adopt the use of RSS for onshore directional drilling applications however CEIL took a step ahead by deploying RSS for Mangala field development. RSS was utilized in directional wells to optimize drilling performance and deliver smoother hole profile. Advanced LWD services such as bed boundary detection tool along with RSS have brought value in successful landing and placement of horizontal wells in the best reservoir strata. Application of near-bit gamma ray and other LWD measurements to identify the top of reservoir as early as possible has helped to avoid the requirement of drilling pilot holes. This paper discusses such application in detail and presents its benefits.The result was a noticeable improvement in well delivery time, reduced drilling cost, and improved hole quality. This paper compares the drilling performances with PDM vs RSS in the same field and presents the lessons learnt in the process of field development. RSS delivered less tortuous hole which result in a problem-free liner or screen run. Hole cleaning was improved which allowed to drill at faster ROP without taking risk of well complication. Time versus Depth analysis clearly indicated that RSS was both technically and economically, a sound approach for drilling the wells in Mangala field. This paper showcases a case study where RSS application proven to be cost-effective solution even in low-margin onshore field development. Mangala Field OverviewThe Mangala Field is located in the northern Barmer Basin of Rajasthan state, India. The basin is a Tertiary rift, predominantly consisting of Palaeocene-Eocene sediments. The Mangala Field was discovered in January 2004 with Mangala-1 then appraised by drilling of 6 more wells, including acquisition of a 3D seismic survey, and major data gathering efforts involving core, fluids, and well testing 1 .The main reservoir unit in the Mangala Field is the Fatehgarh Group, consisting of interbedded sands and shales. The group has been sub-divided into the Lower Fatehgarh Formation dominated by well-connected sheetflood and braided channel sands, and the Upper Fatehgarh Formation dominated by sinuous, meandering, fluvial channel sands. Five reservoir units are recognized in the Mangala Field, named FM1-FM5 from the top downwards. FM1 and FM2 comprise the Upper Fatehgarh Formation and FM3, FM4 and FM5 form the Lower Fatehgarh Formation. The overlying Barmer Hill Form...

show abstract

“…On the other hand, the principal element to create a deviation of a well using the PUB technique is rotary steerable system (RSS) Schaaf et al (2007); Warren (2006). It requires a special BHA component to direct the well path toward the desired direction, so-called rotary steering device Ruszka (2003).…”

Section: Introductionmentioning

confidence: 99%

Rotary steerable systems: mathematical modeling and their case study

Andrade

Saavedra

Tunkiel

et al. 2021

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Directional drilling is a common and essential procedure of major extended reach drilling operations. With the development of directional drilling technologies, the percentage of recoverable oil production has increased. However, its challenges, like real-time bit steering, directional drilling tools selection and control, are main barriers leading to low drilling efficiency and high nonproductive time. The fact inspires this study. Our work aims to contribute to the better understanding of directional drilling, more specifically regarding rotary steerable system (RSS) technology. For instance, finding the solutions of the technological challenges involved in RSSs, such as bit steering control, bit position calculation and bit speed estimation, is the main considerations of our study. Classical definitions from fundamental physics including Newton’s third law, beam bending analysis, bit force analysis, rate of penetration (ROP) modeling are employed to estimate bit position and then conduct RSS control to steer the bit accordingly. The results are illustrated in case study with the consideration of the 2D and 3D wellbore scenarios.

show abstract

Steerable Motors Hold Out Against Rotary Steerables

Cited by 15 publications

References 15 publications

Controlling Well Path Trajectory with Rate of Penetration Modulation

Controlling Well Path Trajectory with Rate of Penetration Modulation

Utilization of Rotary Steerable Technology for Field Development and Drilling Shallow-TVD Horizontal Wells

Rotary steerable systems: mathematical modeling and their case study

Contact Info

Product

Resources

About