Modular Mini-Derrick Reduces Cost
In the Gulf of Mexico (GOM) alone, there are approximately 4,000 platforms that must eventually be abandoned and removed, in accordance with Minerals Management Service requirements. In view of this, BJ Tubular Services recognised a gap in the market for a more efficient means of carrying out this necessary process. Traditionally, service companies have relied upon casing jacks to remove the conductors when abandoning a well. However, given that casing jacks can only pull 10-foot sections of conductor, and sea growth had to be stripped from the conductor to prevent slippage while the casing jacks gripped them, it was a costly and time-consuming method.
Rigless Intervention System Speeds Up Dismantling Process
By pinning the conductor section and lifting it with slings, less time is required to carry out the extraction process by enabling 50-foot sections to be cut and laid out.
Well Abandonment: How it Works
Field-proven Rigless Intervention System Saves Time and Money in GOM
An innovative swivel system was developed by BJ to overcome problems associated with pulling through undersize bell guides. BJ used the bowl and slips to hold the pipe before installing the pins. The Rigless Intervention System was then used to pick up the 50-foot joints. The estimated timesaving achieved with the system was in excess of 1.25 days per well, resulting in dramatically reduced costs per well when compared with conventional jacking systems.
In recent months, BJ Tubular Services also used the Rigless Intervention System to extract 15 conductors for a major operator in the GOM in the southern Marsh Island area: five on Platform A and 10 on Platform B.
"We are very excited about the benefits realised recently by our clients in the GOM, as a direct result of using the Rigless Intervention System," said Kenny Watt, division manager of BJ Tubular Services. "Its successful performance in the field demonstrates the system's ability to reduce the amount of time required to abandon a well in a safe and environmentally friendly manner. For operators faced with the prospect of abandoning thousands of wells around the world during the next 20 years, the long-term savings of time and money is truly significant," he added.
Beyond the Gulf of Mexico
Watt is confident that with the number of multi-well platforms scheduled for abandonment in the Persian Gulf, Southeast Asia and West Africa, BJ Tubular Services will soon be carrying out abandonment operations well beyond the Gulf of Mexico.
The Rigless Intervention System became a central feature of BJ Tubular Services's hammer services portfolio in 2003. BJ Tubular Services has a history of 30 years in the hammer services business. It has delivered hundreds of single slot hammer conductor and caisson-driving operations worldwide, in Europe, Latin America, India, Malaysia, Vietnam, Indonesia, Trinidad, China, the Middle East, West Africa and the Gulf of Mexico.
With the 2003 acquisition of hydraulic and diesel hammer services specialist Petro-Drive of Lafayette, Louisiana, BJ Tubular Services expanded its range to include drive pipe whipstocks, high penetration drive shoes, guardian and batter pile installations and the Rigless Intervention System.
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