The One-pass Drilling Footage Of The Manshen Block in The Tarim Oilfield Reached 3,611 Meters

During the second opening of Well Manshen 807, it was necessary to use the BH-MWD instrument to track a well section of nearly 4,000 meters under the conditions of a large borehole of 333.4 mm. Not only was the vertical depth and bottom hole pressure large, but the displacement also varied greatly, which required the instrument to withstand impact. Corrosion resistance and signal amplitude stability pose greater challenges, posing challenges to construction.

This company selected experienced team leaders, selected high-quality pulse instruments and erosion-resistant instrument accessories, and fully tested the equipment. Conduct detailed technical briefings with the drilling team to find out the displacement range and optimize the ratio plan. According to the speed increase template, the gap in the mushroom head restrictor ring is increased to reduce the pulse pressure.
During the construction, the team leader strictly performed his duties and repeatedly reminded the mud technicians to reduce harmful solid phases in the mud, maintain mud performance, effectively extend the service life of instruments and equipment, and complete the second "one-trip drilling" project with high quality and efficiency.

In the end, the well was drilled to a medium completion depth of 4,820 meters in the second operation, with a pure drilling time of 220.5 hours and a speed increase of 14.2%. It set a new record for the "one-trip drilling" cycle in the second operation of the full-depth block and accumulated valuable experience for improving the efficiency of a single machine in the Tarim market.