China Petroleum Network (Reporter Elsie in the news correspondent Chen Xiang) 12 21, A new cone bit in the smooth Ke 30-P Well to drill through 50 meters coal, drilling for the large segment of the safety problem of coal found a new way.

    Ke 30-P well is a horizontal well Kekeya block. By design, this well to 57 degrees inclination in the case of nearly 50 meters across the seam section. Depth, well deviation large, thick coal seam and easy to collapse is the biggest problem of drilling. This is a block drilling speed has been plagued by Kekeya the biggest problem.

    For large section of seam horizontal well construction problems, Tuba Drilling Technology Research Institute to design a new type of drilling for coal seam roller bit. This bit of mud flow through the optimization of design, to avoid drilling in the coal section of the jet on the wall of the role of erosion damage, a significant increase in annular flow through the channel space, cuttings, etc. can be improved through capacity.

    Ke 30-P in the well, drilled to a depth of 3176 meters when entering coal, has begun to drill down into the new. Drilled from a depth of 3226 meters, security through the coal seam 50 meters. Compared with the normal three-cone drill, in the short pull and from the drilling process significantly reduced the resistance card phenomenon.