CNPC USA

Application

• • Sealing elements for dissolvable plugs
• • Dissolvable sealing materials for various completion, drilling, and measurement tools

feature and Benefits

• CNPC-USA designed dissolvable rubbers formulations and manufacturing process
• Wide temperature ranges from 40°C to 175°C
• The dissolution and mechanical properties could be controlled. The dissolution rate of the CNPC-USA dissolvable rubber was faster than that of the dissolvable rubbers in the market
• The dissolvable rubber have elongation, > 300%, high modulus, high tear strength at high temperature
• The dissolution rate is not affected by the salinity
• The dissolvable rubbers could be fully dissolved at certain temperature

Field Cases

The dissolvable rubber elements developed at CNPC-USA have been successful applied in many fields in China, including Southwest, Daqing, Xinjiang Oil Fields, etc.

Field Case Example:

In June 2020, 20 dissolvable plugs with MT dissolvable rubber element were used in the Weiyuan Wei202H56-4 full well. The maximum pressure of the well was 88 MPa, and dissolvable plug was soaked for up to 16 hours, the dissolvable plug could maintain stable presseure holding. During the milling process, 13 stages passed through without any obstruction. For the rest of 7 stages, The maximum milling time was 10 minutes and the minimum was only 3 minutes.