| Popis: |
This paper describes the basics of the Targeted Bit Speed (TBS) technology and results of its application during construction of a group of wells at Urengoyskoe field located in Yamal-Nenets Autonomous Area, Russia. It highlights the advantages of TBS technology as compared to drilling with conventional BHA with a hydraulic drilling motor. It also compares various BHA configurations incorporating the TBS system. The Targeted Bit Speed technology is designed to improve well drilling efficiency. The TBS technology is based on a conventional bent-housing positive displacement motor (PDM) with measurement-while-drilling (MWD) tools. TBS technology delivers the same advantages as rotary-steerable systems enabling full 3D directional control with continuous drillstring rotation. In those cases when the required dogleg severity cannot be achieved with TBS technology, the system's operation can be suspended without retrieving the BHA to the surface with further directional drilling by conventional PDM orientation method. This paper describes the results of well construction at Urengoyskoe field, where the TBS technology was used by the operator to drill S-shaped wells with a horizontal displacement of over 1,000m. This paper focuses on directional control improvements, increased rate of penetration (ROP) and rotary drilling share achieved by the new system. Information provided in the paper applies to the first wells drilled in West Siberia by the TBS method. |
