Through Tubing Rotary Drilling: A Cost-Effective Method for Sidetracking Wells 
in Mature Assets

Kleverlaan, Martijn; Lawless, Angelique

doi:10.2523/91005-ms

Cited by 1 publication

(4 citation statements)

References 1 publication

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“…In 2000, TTRD was identified some years ago as the ideal drilling method for North Cormorant and a successful campaign of five wells was executed in 2003. 1,2 Many potential TTRD targets still remain in North Cormorant, as well as in other fields. However, slot constraints and relative target vicinity make it more and more difficult to string a campaign of TTRD wells together.…”

Section: Rss For North Sea Assets: the Business Casementioning

confidence: 99%

“…Therefore, it is worth mentioning that there are a couple of emerging technologies that contributed to the success in the last Shell TTRD North Cormorant campaign. 1 Those technologies, along with the ultra slim RSS, will contribute to the growth of TTRD activity. One of those technologies was the use of the micro-max drilling fluid in which the conventional weighting agent is replaced by manganese tetra-oxide to give a low-rheology fluid with enhanced antisag characteristics.…”

Section: Going Forward With Ttrd and Rssmentioning

confidence: 99%

“…The use of this fluid provides better ECD control, enabling the drilling of wells with tighter tolerances between the ECD (due to higher mud weight requirements) and fracture gradients at the casing exits. 1 Another technology was swelling packers that swell naturally when exposed to the appropriate swelling agent. Those packers have been successfully used as a replacement for traditional mechanical packers and cement to provide zonal isolation.…”

Section: Going Forward With Ttrd and Rssmentioning

confidence: 99%

“…The advantages and limitations of TTRD are well documented. 1,2 Many mature fields are slot-constrained and contain significant remaining reserves located in discreet, small isolated pools. TTRD offers an attractive option for incremental investment and returns.…”

Section: Introductionmentioning

confidence: 99%

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Ultra Slim Rotary Steerable System Enhances Brownfield Production

El-Kholy¹,

Kuyken²,

Kleverlaan³

et al. 2005

Proceedings of Offshore Europe

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractSchlumberger has worked collaboratively with Shell U.K. Limited (Shell), BP and Statoil to develop a 3 ¼-in. ultra slim through tubing rotary steerable system (RSS) with the objective of extending the production profile of offshore maturing fields. Through tubing rotary drilling (TTRD) is a very attractive option for enhanced reservoir development at low cost. Current methods use motor bottomhole assemblies (BHAs) in TTRD applications, but these have limitations. The introduction of the RSS will extend the reach of TTRD to pursue more distant targets, enhance production through precise directional control, improve drilling performance, reduce drilling cost, and improve ultra slimhole hydraulics. The tool has entered its field test stage and has two successful downhole runs to date.This paper provides a brief overview of TTRD as a method of sustainable development of mature oilfields (brownfields). A detailed overview of the tool development is given, including the main milestones and a system description. The joint RSS development project is presented as a best practice in industry collaboration and a good example of a collective visionary approach to future brownfield development.

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Section: Rss For North Sea Assets: the Business Casementioning

confidence: 99%

Section: Going Forward With Ttrd and Rssmentioning

confidence: 99%

Section: Going Forward With Ttrd and Rssmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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