... and subsurface location led to challenging well trajectory design options. Two of the primary options have been discussed in this paper of which the medium radius option was finally drilled. Further, the well design was changed from a 3 hole section to 2 hole section design to minimize drilling cost...

...% of the sliding mode of drilling has been the only option to achieve such high dogleg severity (DLS/100ft). Drilling medium-radius wells with a conventional motor assembly requires multiple runs, wiper trips to clean the hole, and multiple reaming trips before running the liner. These operations result in poor...

... and hence longer duration of slower rate of penetration (ROP). Responding to domestic demand for natural gas growth, Saudi Aramco started to focus on reducing unit cost and maximizing reservoir production. After a feasibility analysis, drilling medium-radius curve wells with steerable motors was put forth...

... Abstract Saudi Aramco's first medium radius horizontal sidetrack gas well, Haradh-AX1, was drilled and completed in June, 2008 in a record time of 48.7 days with 4,989 ft of reservoir contact and a 33% reduction in overall cost. The previous, Khuff-C Horizontal sidetracks which included...

... Abstract Saudi Aramco's first medium radius horizontal sidetrack gas well, Haradh-AX1, was drilled and completed in June, 2008 in a record time of 48.7 days with 4,989 ft of reservoir contact and a 33% reduction in overall cost. The previous, Khuff-C Horizontal sidetracks which included...

... the challenges of designing and drilling the first deep, medium radius, high pressure well bore sidetrack, from an existing production well, into the Jurassic HPHT reservoirs. These challenges include the necessity to mill up the existing liner hanger and 80 ft. of casing to allow for any future re-completion...

... reusable equipment where possible, example is wellhead, tubing, existing locations and materials from excess stock items. Abstract With the plan to achieve an operator aspiration of 1.76 MMBOPD by year 2004, a medium radius horizontal sidetrack campaign project was initiated by Operator to provide 33...

... The major design considerations were: To reduce footage by using medium to intermediate radius technology thereby reducing well equipment and accessories. Re-use old equipment (wellhead/tubings) where possible. Use existing facilities where possible e.g. existing locations and materials from excess...

... Abstract Improvements in horizontal drilling technology made it possible to drill almost in all types and shapes of reservoirs. No change, however, was made in the design of drill pipes to overcome the high stresses especially for drill pipe rotating in medium or short radius horizontal wells...

... Abstract In January 1991, Petroleum Development Oman L.L.C. began a campaign to drill six medium radius horizontal wells in the Nimr field in South Oman. The wells were drilled with a 12-1/4" build up section followed by an 8-1/2" horizontal section. On the basis of this campaign, a decision...

...SPE Society of Petroleum Engineers SPE 23013 Planning and Drilling Australia's First Medium-Radius Horizontal Wells T.J. Moo and M.w. Tweedy, West Australian Petroleum Pty. Ltd. SPE Members Copyright 1991, Society of Petroleum Engineers, Inc. This paper was prepared for presentation at the SPE Asia...

...SPE/IADC Society of Petroleum Engineers SPE/IADC 21988 Drilling a Medium-Radius Horizontal Well With Aerated Drilling Fluid: A Case Study S.B. Claytor* and K.J. Manning, * Smith IntI. Inc., and D.L. Schmalzried, Marathon Oil Co. "lADe Members SPE Members Copyright 1991, SPElIADC Drilling Conference...

... Abstract General techniques for designing the bottomhole assembly (BHA) for a medium radius horizontal well are reviewed with emphasis on achieving an integrated drilling system by optimizing bottomhole assembly performance via the proper selection of BHA components. Systems analysis includes...

... SPE Members Abstract Two horizontal wells, one with a medium radius angle build rate and the other with a long radius wellbore have been drilled into the same oil bearing sandstone in the Province of Alberta, Canada. The wells were drilled as development wells to test the concept...

... Abstract Sidetracking through casing window is an effective measure for developing old oil fields. Medium-short radius, as known as intermediate, horizontal well is required to produce the residual oil in the original well network for short landing point displacement. 5LZ95×7.0TW double bent...

... Abstract While traditional definitions classify short-, medium- and long-radius lateral wells by angle build rates, the technology now employed to achieve those build rates suggests an industry definition which characterizes lateral wells not only in ten-ns of wellbore geometry...