PowerDrive X6. Rotary Steerable System for high-performance drilling and accurate wellbore placement
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1 Rotary Steerable System for high-performance drilling and accurate wellbore placement
2 The PowerDrive X6 RSS maintains control under the most difficult conditions, bringing the benefits of rotary steerable systems to the harshest environments. The PowerDrive* rotary steerable systems (RSS) were developed to optimize directional drilling. These systems represent a step change in reliability and efficiency, facilitating the drilling of longer runs, optimizing wellbore placement, and reducing drilling time by drilling shoe to total depth in one run at maximum ROP. The cost savings that result can be direct and substantial. Full rotation reduces drag, improves ROP, decreases the risk of sticking, and achieves superior hole cleaning. It also improves wellbore smoothness and decreases tortuosity, which reduces drilling torque and eliminates unplanned wiper trips. Penetration rates are improved because there are no stationary components, which eliminates the friction that reduces efficiency and anchors the BHA in the hole. The flow of drilled cuttings past the BHA is enhanced because annular bottlenecks are not created in the wellbore. Larger operating envelope The push-the-bit PowerDrive X6* RSS is the latest in the Schlumberger family of rotary steerable systems. With more robust and wider flow ranges, the PowerDrive X6 tool minimizes the effects of external drilling environment factors, improving performance and reliability. The robust, improved control of the PowerDrive X6 RSS is able to handle higher mud weights, wider flow ranges and drilling dynamics, aggressive muds, and small debris, making it suitable for harsh environments. Dual impeller control and a new impeller design provide a wider operating envelope, allowing the PowerDrive X6 tool to drill at higher mud weights with improved control. The higher operational envelope provided by the much wider flow range brings RSS benefits to wells where it was not previously possible. Full directional control The PowerDrive X6 RSS is designed for full directional control while rotating the drillstring. An automatic inclination hold and efficient downlink function minimize the interaction with the directional driller needed to maintain directional control while drilling ahead. Less time needed for surface interaction means more time spent drilling up to 15% improvement in drilling performance has resulted from increasing productive time on bottom every drilling day. Near-bit measurements, available in real time, ensure accurate, efficient drilling and wellbore placement. Efficient downlink systems and automatic inclination hold provide a smooth tangent section and improve true vertical depth accuracy in the horizontal section critical for maximizing recoverable reserves and the well s production potential. An MWD-type triaxial sensor package close to the bit provides accurate azimuth and inclination directional information, which allows fast, responsive directional control in either automatic or manual operation mode. Once a target formation has been penetrated, the trajectory can be locked in using the inclination hold functionality. No further input is required from the directional driller. New Features and Benefits Upgrades to the PowerDrive X6 control unit include new torquer design that provides extra torque for stick and slip and jamming situations new bearing design and materials that are more resistant to high temperatures and aggressive mud environments smarter electronic boards that enable power redundancy (dual impeller control) improve resistance to stick and slip optimize real-time communication increase the operating envelope new impeller design that increases available hydraulic torque, improving toolface control more sophisticated inclination hold algorithms, faster downlinks.
3 REDUCED COST, INCREASED CONFIDENCE The improved overall reliability of the robust PowerDrive X6 RSS increases confidence and reduces cost by expanding the operating envelope minimizing the effect of drilling dynamics such as stick and slip providing better control during jamming improving jam resistance maintaining toolface control for more precise steering maintaining real-time communications at all times achieving longer runs reducing NPT. Clients have experienced more than 25% improvement in reliability. Steering decisions are further aided by an optional real-time azimuthal gamma ray measurement and imaging of the wellbore to provide information on formation dip or fault boundaries. An azimuthal gamma ray sensor close to the bit enables drillers and geologists to identify bed boundaries quickly, allowing faster response to formation changes. This optimizes well placement and casing and coring point detection. It also minimizes penetration of formations to be cored and significantly reduces the chances of drilling through a potentially valuable core section or wasting time coring an uninteresting formation. Improved reliability The more robust PowerDrive X6 system maintains control while drilling in rough environments, including stick and slip situations and drilling dynamics. A robust steering section and advanced coating materials that mitigate wear ensure reliable, consistent performance in a wide range of drilling environments. Optimized flow profiles reduce the risk of sticking, limit the effects of mud solids, and reduce erosion of internal and external downhole components. The system s electronics, which are chassis-mounted for reliability and durability, can operate in downhole temperatures as high as 300 degf [150 degc]. All PowerDrive X6 external parts rotate, which reduces drag, improves ROP, decreases the risk of differential or mechanical sticking, and achieves superior hole cleaning and conditioning. Working in combination with the systems automatic trajectory functionality, the full rotation increases wellbore smoothness and decreases tortuosity. This reduces drilling torque, improves drilling efficiency, and eliminates the need for unplanned wiper trips. The smooth wellbore also makes it easier to run casing and simplifies activities later in the life of the well, such as coiled tubing intervention and electrical submersible pump installation. Proven results Reliability has increased significantly in locations where PowerDrive X6 is being used. In field tests, the PowerDrive X6 RSS has drilled more than 1 million feet and 32,000 operating hours. Clients have experienced more than 25% improvement in reliability running the PowerDrive X6 RSS, most noticeably in smaller hole sizes. More robust and wider flow ranges of the PowerDrive X6 RSS minimize the effects of external drilling environment factors, improving performance and reliability.
4 Specifications PowerDrive X6 475 PowerDrive X6 675 PowerDrive X6 825 PowerDrive X6 900 PowerDrive X Nominal OD (API) 4.75 in [120.7 mm] 6.75 in [171.5 mm] 8.25 in [209.6 mm] 9.00 in [228.6 mm] 9.50 in [241.3 mm] Hole size in to in in to in in to in 12 in to in in to 28 in Overall length ft [4.56 m] ft [4.11 m] ft [4.45 m] ft [4.45 m] ft [4.60 m] Max. collar dogleg 30 /100 ft [30 /30 m] sliding, 16 /100 ft [16 /30 m] sliding, 12 /100 ft [12 /30 m] sliding, 10 /100 ft [10 /30 m] sliding, 8 /100 ft [8 /30 m] and 4 /100 ft [4 /30 m] 10 /100 ft [10 /30 m] rotating 8 /100 ft [8 /30 m] rotating 6 /100 ft [6 /30 m] rotating 5 /100 ft [5 /30 m] rotating for hole sizes between in and in Build rate 0 8 /100 ft 0 8 /100 ft 0 6 /100 ft 0 5 /100 ft 0 3 /100 ft 4 /100 ft [4 /30 m] and 2 /100 ft [2 /30 m] for hole sizes between 20 in to 28 in Max. operating torque 9,000 ft.lbf [12,200 N.m] 16,000 ft.lbf [21,700 N.m] 32,000 ft.lbf [43,380 N.m] 48,000 ft.lbf [65,000 N.m] 48,000 ft.lbf [65,000 N.m] Max. operating load 340,000 lbf [1,500,000 N] 1,100,000 lbf [4,900,000 N] 1,100,000 lbf [4,900,000 N] 1,400,000 lbf [6,200,000 N] 2,280,000 lbf [10,140,000 N] Max. weight on bit As recommended by drill bit vendor As recommended by drill bit vendor As recommended by drill bit vendor As recommended by drill bit vendor As recommended by drill bit vendor Weight of assembly in air 754 lbf [3,300 N] 1,700 lbf [7,500 N] 1,900 lbf [8,455 N] 2,370 lbf [10,500 N] 2,584 lbf [11,490 N] Max. lost circulation 35 lbm/bbl medium nut plug 50 lbm/bbl medium nut plug 50 lbm/bbl medium nut plug 50 lbm/bbl medium nut plug 50 lbm/bbl medium nut plug material Flow range galus/min [380 1,430 L/min] galus/min [750 3,590 L/min] 300 2,000 galus/min [1,130 7,550 L/min] 300 2,000 galus/min [1,130 7,550 L/min] 300 2,000 galus/min [1,130 7,550 L/min] Lateral vibrations Shock level 3 (50-g n threshold), 30-min limit 30-min limit 30-min limit 30-min limit 30-min limit Stick/slip ± 100% mean rotational speed, ± 100% mean rotational speed, ± 100% mean rotational speed, ± 100% mean rotational speed, ± 100% mean rotational speed, 30-min limit 30-min limit 30-min limit 30-min limit 30-min limit Max. rotational speed 220 rpm 220 rpm 220 rpm 220 rpm 220 rpm for hole sizes between in to in 125 rpm for hole sizes between 20 in to 28 in Max. temperature 302 degf [150 degc] 302 degf [150 degc] 302 degf [150 degc] 302 degf [150 degc] 302 degf [150 degc] Max. hydrostatic pressure 20,000 psi [138 MPa] 20,000 psi [138 MPa] 20,000 psi [138 MPa] 20,000 psi [138 MPa] 20,000 psi [138 MPa] Pressure drop across tool Density (in lbm/galus) Flow 2 (in galus/min) Density (in lbm/galus) Flow 2 (in galus/min) Density (in lbm/galus) Flow 2 (in galus/min) Density (in lbm/galus) Flow 2 (in galus/min) Density (in lbm/galus) Flow 2 (in galus/min) 14,500 56, , , ,500 Recommended pressure psi [ MPa] psi [ MPa] psi [ MPa] psi [ MPa] psi [ MPa] drop across bit Mud sand content 1% by volume 1% by volume 1% by volume 1% by volume 1% by volume Rotary Connections Collar upper connection IF box IF box Reg box Reg box Reg box Bit box Reg Reg Reg Reg Reg Sensors Bit box to gamma ray 5.86 ft [1.79 m] 6.40 ft [1.95 m] 7.56 ft [2.30 m] 7.56 ft [2.30 m] 7.97 ft [2.43 m] Bit box to inclination 6.73 ft [2.05 m] 7.27 ft [2.21 m] 8.43 ft [2.57 m] 8.43 ft [2.57 m] 8.83 ft [2.69 m] Bit box to azimuth 8.83 ft [2.69 m] 9.37 ft [2.85 m] ft [3.21 m] ft [3.21 m] ft [3.33 m] Inclination accuracy 0.11 (at 1 sigma level) 0.11 (at 1 sigma level) 0.11 (at 1 sigma level) 0.11 (at 1 sigma level) 0.11 (at 1 sigma level) Azimuth accuracy 1.8 at 90 inclination (at 1 sigma level) 1.8 at 90 inclination (at 1 sigma level) 1.8 at 90 inclination (at 1 sigma level) 1.8 at 90 inclination (at 1 sigma level) 1.8 at 90 inclination (at 1 sigma level) Gamma ray accuracy, ± 5% (30-s averaging window) ± 5% (30-s averaging window) ± 5% (30-s averaging window) ± 5% (30-s averaging window) ± 5% (30-s averaging window) azimuthal 4-quadrant Shock detector threshold, 50 g n max. peak) radial Depending on weight on bit (WOB). Depending on mud weight values.
5 PRODUCTIVE DRILLING PUTS WELLS IN THE BEST PLACE IN LESS TIME WITH robust jam resistance for reliable control even in harsh formations near-bit inclination and formation evaluation measurements improved downlink and inclination-hold function for precise well placement real-time azimuthal gamma ray at bit for geostopping. *Mark of Schlumberger Other company, product, and service names are the properties of their respective owners. Copyright 2016 Schlumberger. All rights reserved. 10-DR-0233
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