SPE NL invites you to upcoming monthly meeting
Restoring Well Integrity from diagnosis to repair.
By Claudio Borlandelli (Archer, 'The well Company’)
and Theo Rijper (Seal-Tite® International Engineered sealing Solutions)
When operators are faced with issues involving e.g. casing leaks, tubing, completion component leaks, typical course of action is to pull the tubing and make efforts to identify and locate the source of the leak by logging or other mechanical means. If the leak source can be successfully located, a mechanical method is generally employed to patch the leaking casing. This methodology is time consuming and expensive.
Locating casing leaks with the tubing in place using conventional logging techniques has historically been difficult. Where some tools, such as temperature tools, may provide an indication of an anomaly in annuli, the data may be subjective or the leak may be too small to measure. Other leaks may be hidden behind the temperature change of the biggest leak.
When active, a leak will produce a spectrum of sonic frequencies that may be either audible, ultrasonic or both. Ultrasonic energy will pass through steel but travels relatively short distances. A tool developed around these principles has been successful in accurately locating casing leaks behind tubing.
In combination with the accurate diagnosis of a leak location and rate, Pressure-activated sealants have been used for a number of years to cure a wide variety of leaks in casing, tubing, control lines, and well heads as well as micro-annulus leaks in cement. For the purpose of repairing a casing leak behind tubing, the liquid sealant may be pumped into the annulus and displaced to the leak site. The liquid sealant will not polymerize until it is exposed to the differential pressure through the leak site. Knowing the leak rate, pressure and precise location of the leak aids in the selection of the sealant formulation and deployment method. This helps to reduce overall repair cost as well as increase the probability of a successful repair.
The presentation will explain the basic principle of the tools and their relation to each other, including some field examples followed by a presentation explaining the basic principle of Pressure Activated Sealant which can be used to remedy the problems discovered with Leak Point and Flow Point. Again followed by some field History cases.
The next SPE Netherlands Section Monthly Meeting is:
Monday 14th of April
in Hotel Carlton Ambassador,
Sophialaan 2, The Hague.
18:00 Social Hour
19:00 Lecture by Claudio and Theo
Please register here before Friday 11th of April 12:00
Entrance: Members € 30 Non-members € 35 Students: € 10
|SPE Netherlands proudly announces that it has become a partner of Jet-Net! Gasunie, TNO, Shell and the NAM are already Jet-Net companies who are active in the E&P sector. Is your company going to be part of the solution?
Visit Jet Net at http://www.jet-net.nl
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