In the field of oil and gas extraction, the top drive system replaces the traditional rotary table to drive the drill pipe, and the gas-liquid slip ring is responsible for the transmission of high-pressure mud between the rotation of the drilling rig and the ground pump station.

Working Challenges

When the drilling depth exceeds 5,000 meters, the mud pump needs to deliver drilling fluid at a pressure of more than 30MPa, and the top drive speed can reach 200 RPM. The gas-liquid slip ring needs to maintain sealing under severe vibration and abrasive scouring environment to avoid the risk of blowout caused by leakage of high-pressure mud. The advanced drive slip ring adopts tungsten carbide hard sealing ring, combined with a two-way lip seal design, with a service life of more than 5,000 hours.

Technological innovation

To adapt to ultra-deep well operations, some intelligent slip ring with integrated pressure sensors and flow meters to monitor mud density and flow rate in real time, and the data is transmitted wirelessly to the control center. In addition, the self-flushing design can reversely inject cleaning fluid when drilling is stopped to prevent mud solidification and blockage of the channel. On the Arctic Circle drilling platform, the addition of electric heating function enables the slip ring to start normally in a -50℃ environment.

Economic benefit analysis

The use of high-reliability gas-liquid slip rings can reduce unplanned downtime by about 15%, and the cost of drilling a single deep well can be reduced by more than one million US dollars. At the same time, precise mud control reduces the risk of formation rupture, and the environmental benefits are significant.

CENO have design and manufacture slip rings around 20 years, and have kinds of functions slip rings. For more information about how CENO slip ring can fit your special applications, please contact us.