Next Generation of Sakhalin Extended-Reach Drilling

Six of the longest-reach wells in the world have been drilled in Chayvo field on Sakhalin Island. Revised completions used standalone screens (SASs), predrilled liners, and swell packers to achieve a low-damage, sand-free completion with zonal isolation. Bit designs, bottomhole-assembly (BHA) configurations, and operations practices were modified to minimize the amount of backreaming, improve the overall rate of penetration (ROP), and achieve a "one-pass trippable hole" (OPTH). Improving rotary-steerable-system (RSS) reliability could eliminate trips to replace the tools.

Synopsis of SPE 99131

This article, written by Technology Editor Dennis Denney, contains highlights of paper SPE 99131, "The Next Generation of Sakhalin Extended-Reach Drilling," by R.A. Viktorin, SPE, J.R. McDermott, R.E. Rush Jr., SPE, and J.H. Schamp, SPE, ExxonMobil, prepared for the 2006 IADC/SPE Drilling Conference, Miami, Florida, 21-23 February.

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