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CHETRA Mechanical Seals for Oil & Gas

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Quality in detail – including for major projects.

In the Far East CHETRA fitted mechanical seals to the pipeline pumps and booster pumps in over 700 stations.

Special requirements due to the high pressure of up to 130 bar on the mechanical seal. The characteristics of the media – crude oil with up to 30 % wax content, sulphur content, contamination and solid matter must all be managed securely. In addition, there is also the outdoor location, with extreme temperature fluctuations.

 

Innovative solution – new off-shore project.

The "Sanha FPSO Project" is the first project in which the complete facilities for processing approximately 37,000 barrels of LGP per day in "portable" propane-butane products are arranged on a ship. The term FPSO stands for Liquified Petroleum Gas – Floating Petroleum Storage and Off-Take Vessel. This method means that the routine flaring of gas is dispensed with.

The processing ship "Sanha" lies off the coast of West Africa and is operated by a global oil group. CHETRA was fitting-out the 5 main compressors with mechanical seals and supply facilities. In view of the "explosive" environment, the highest safety standards were required to be met, with this involving the employment of new – unconventional – components.

 

Tailored solution – high standing time in "WIP" application.

In the Algyö oil field in southern Hungary the high abrasiveness of the medium and severe axial movements of the 8-stage "WIP" water injection pumps resulted in low standing times for the seals originally employed.

To keep production downtime caused by replacement to a minimum, the operator decided to switch to stationary CHETRA mechanical seals, designed specifically to deal with a high pv operating factor including the use of solid tungsten-carbide and silicon-carbide rings. The live time (MTBF) was subsequently improved by a factor of 4.