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| Technology Conferences INTEC Participates in Subsea Tie-back Forum From 6 to 8 February, INTEC participated in the first Subsea Tie-Back Forum, held at the Moody Gardens Hotel in Galveston. This highly successful event, organized by Pennwell, was attended by more than 360 engineers and managers involved in deepwater oil and gas field developments. As exploration and production activities move into deeper water further off the continental shelf, subsea tie-backs are emerging as the development solution of choice for smaller fields. INTEC has been a leader in this field, providing subsea tie-back related engineering to Shell Deepwater, Texaco, Mariner Energy, Ocean Energy, TotalFina Elf, ExxonMobil, and other operators. INTEC Engineering managers, Bill Beran and John Weeks, served on the forum advisory board. INTECs Steve Cochran co-chaired the Flow Assurance Session, a very important aspect of subsea tie-back developments. INTEC Business Development Coordinator, Paul Kronfield met with clients and contractors at the INTEC exhibit, which showcased the BG West Delta Deep Project, the Texaco Agbami Project and other notable technological accomplishments. INTEC will also participate in the next Subsea Tie-Back Forum, scheduled to be held 5 to 7 March 2002 at South Shore Harbour, League City, Texas. |
EXITEP 2001
Second International Petroleum
More than 300 operator, engineering and service companies from countries such as the United States, Germany, Brazil, Canada, France, Holland, England, Japan, Venezuela and México, among others, were represented. Companies exhibited their products and services, and presented their capabilities to over 15,000 visitors from México and others Latin countries. INTEC Engineering, with an exhibit focused on marketing our services to Pemex and other | |
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Mobile Bay, A Decade Of Innovation
For more than a decade, ExxonMobil and INTEC have developed innovative engineering, material and construction methodologies to meet the high pressure, high temperature, and corrosive gas applications in environmentally sensitive Mobile Bay, Alabama. Developments in Mobile Bay typically produce high temperature sour gas. Initially, ExxonMobil developed this type of field by installing a flowline system from a new well template where high temperature gas would be cooled before flowing to the nearest production platform for further processing. Beginning in the late 1980s, ExxonMobil began to consider methods for eliminating the need for gas cooling facilities well template platforms, which would result in having to design in field flowlines for temperatures approaching 300° F. INTECs involvement goes back to our first Mobile Bay project in 1989 which was based on the first use of ultra-high strength corrosion resistant materials for carrier pipe applications. Hastelloy Grade 110 corrosion resistant alloy (CRA) line pipe was used for resistance to H2S and extreme hoop strength requirements.
This first project included detailed design, relevant material testing and installation supervision of several high temperature, high pressure insulated sour gas flowlines. A number of innovative techniques were applied to reduce cost, improve safety and ensure long-term protection of the environment. This required the development of a welding procedure that could be used with cold worked material. A pipe-in-pipe design configuration was used for the project. A 4-inch diameter CRA carrier pipe was contained in an 8-inch diameter carbon steel jacket pipe. Polyurethane foam with a mineral wool field joint buffer was used to meet insulation requirements. The flowlines were installed using a dedicated laybarge specifically developed for work in shallow water, and configured to install 4 flowlines simultaneously. Two barges were linked end to end to increase the number of weld stations for pipe-in-pipe make-up. The crossing of the Mobile Bay Ship Channel required directional drilling using an innovative wet-to-wet arrangement to avoid damaging the sensitive environment. The work was performed from 1989 to 1992.
In 1997, additions to the field were implemented with INTEC providing similar services. ExxonMobil decided to increase gas production in Mobile Bay by installing an 8-inch flowline between the existing 114C Well Template and the 115C Production Platform in Mobile Bay. INTEC was responsible for preliminary engineering including development of all material and construction specifications and cost estimates for detailed engineering, procurement and construction of the flowline. In 1998, ExxonMobil decided to add a new well to expand the gas production development in Mobile Bay. The high temperature, high pressure sour gas would be routed 2.6 miles via a new 4-inch by 8-inch insulated pipe-in-pipe flowline from the planned remote well template to the existing 62A Production Platform, and then continue to shore through existing pipelines. A 3-inch diesel/dilution water flowline and power cable umbilical would be installed with the flowline. The pipe-in-pipe flowline utilized existing surplus pipe-in-pipe consisting of 4-inch corrosion resistant alloy (CRA) carrier pipe due to the high H2S content of the gas, with an X65 8-inch carbon steel jacket pipe. INTEC was responsible for the preliminary engineering from September 1998 through March 1999, and detailed engineering during March to May 1999. The Mobile Bay MB63-2 well tie-back flowline bundle connects two well template platforms, MB63AB, an existing well template, and MB63AC a new well template. The well tie-back flowline bundle includes a Hastelloy/carbon steel pipe-in-pipe flowline, a diesel/water dilution service line and a power and communication cable. The production line is designed to transport sour gas at 300°F and 6,900 psi. Buried U-shaped expansion loops, at either end of the production line, will absorb an estimated 3 ft of expansion and will reduce pipeline axial forces to circumvent pipeline upheaval buckling. Engineering design began in late 1999, and construction was completed in the 4th Quarter of 2000.
In 2000, INTEC continued with the design of the MO 822-7 flowline system. This flowline system extends approximately 3 miles from a new remote well template to an existing production platform. Finally, INTEC is currently working on the detailed design of the MB 63-3 flowline and risers for a new ExxonMobil installation in Mobile Bay. A new well in Block 63 will be tied-back to an existing production platform in Block 62, a distance of approximately 8,100 ft. High temperature, high pressure (300°F/8,000psi) sour gas will be transported by a pipe-in-pipe flowline constructed from surplus pipe from the original project described above. The flowline will be installed in a bundle together with a 3.5-inch diesel/dilution line and a power cable. Approximately mid-way along the flowline route, the bundle will cross the Mobile Bay Shipping Channel. This 2,450 ft crossing will again be achieved by a water-to-water directional drilling method. Z-shaped expansion spools constructed from 4.5-inch Inconel pipe will be installed at each end of the flowline to control expansion into the risers. The completed flowline and expansion spools will trenched and buried. | ||
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| INTEC Engineering, Inc. Intercontinental Building 15600 JFK Boulevard, 9th Floor Houston, TX 77032, USA tel: (281) 987-0800 Primary Fax: (281) 987-3838 Admin Fax: (281) 987-2002 e-mail: info@intec-hou.com | ![]() | INTEC Engineering (SEA) SDN. BHD. Suite 12.2, 12th Floor Menara Aik Hua Changkat Raja Chulan 50200 Kuala Lumpur, Malaysia Tel: +60 (3) 202-2488 Fax: +60 (3) 202-3488 e-mail: info@intec-mal.com.my | ![]() | INTEC Engineering B.V. Poortweg 14 2612 PA Delft, The Netherlands P.O. Box 3178 2601 DD Delft, The Netherlands tel: +31 (15) 256-5675 FAX: +31 (015) 256-0194 email: info@intec-delft.com | ![]() | INTEC Engineering S.R.L. Lavalle #465 Planta Baja 1047, Buenos Aires Argentina tel: +54 (1) 14 327-4120 FAX: +54 (1) 14 327-4121 email: info@intec-hou.com | ![]() | INTEC-egis Adelaide House 200, Adelaide Terrace Perth, Western Australia 6000 tel: + 61 (8) 9220 9374 FAX: + 61 (8) 9325 9897 email: info@intec-hou.com |