Dual Activities Without the Second Derrick
- Dennis Denney (JPT Technology Editor)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- June 2008
- Document Type
- Journal Paper
- 60 - 63
- 2008. Society of Petroleum Engineers
- 2 in the last 30 days
- 89 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||Free|
|SPE Non-Member Price:||USD 15.00|
This article, written by Technology Editor Dennis Denney, contains highlights of paper SPE 112869, "Dual Activities Without the Second Derrick - A Success Story," by Tamara Webb and Kasim Selamat, SPE, Murphy Sabah Oil; and Bill Fletcher, SPE, Seadrill, prepared for the 2008 IADC/SPE Drilling Conference, Orlando, Florida, 4-6 March. The paper has not been peer reviewed.
Kikeh field is 120 km from Labuan, offshore Sabah, Malaysia. The field, in 1330-m water depth, is the first deepwater development in Malaysia and consists of subsea and surface-piercing-articulated-riser (SPAR) development wells. Considering the wide scope of completion work outlined in the program, a detailed work assessment was conducted focusing on processes for which offline activities could be conducted safely and efficiently. As a result, at least seven completion-related activities were identified. During the first batch of SPAR completions, which involved five wells, several activities were completed offline successfully, allowing the rig to be used for critical-path operations.
Completion operations played a major role in the overall Kikeh deepwater development, with 25% of the total field development and 58% of the capital expenditures attributed to well completions. Early focus was on timesaving opportunities that could be performed off of the rig’s critical-path operations. Many factors were assessed including rig capabilities, SPAR capabilities, and personnel. The need for extensive planning and proper communication was investigated, as were completion activities and equipment design.
The scope of SPAR-completion activities was divided into nine phases: production tensioner and riser installation, wellbore cleanout, tubing-conveyed perforation, lower-completion installation, upper-completion installation, tree installation, riser-annulus dewatering, well cleanup, and testing. In addition, several completion-phase activities were identified: cement- and riser-evaluation logging and installation/commissioning of the umbilicals and flowline jumpers.
During the first completion campaign, the following eight activities were consistently performed off the rig’s critical-path operations. The work description and how the work objectives were achieved are detailed in the full-length paper.
Tubular Makeup and Racking Back. Rig design contributed to the success of offline activities. The offline-activities cantilever (OAC), shown in Fig. 1, consists of two dedicated mouse holes capable of handling various ranges of pipe and an overhead crane mounted in the derrick, which accommodated racking tubulars on both the driller side and the off-driller side of the derrick. The OAC provides adequate space to set up a power tong inclusive of a torque turn system.
|File Size||420 KB||Number of Pages||3|