DEVICE AND METHOD FOR PRESSURE REGULATION OF A WELL

摘要

A device for the pressure regulation of a well is provided with a return pump for drilling fluid. The operating level of drilling fluid in an annulus which is fanned between an outer pipe and an inner pipe is at a height level between the upper portion of the outer pipe and the bottom portion of the well. The return pump is in the annulus.

主权项

1. A device for the pressure regulation of a well comprising a return pump for drilling fluid, operating level of drilling fluid in an annulus which is formed between an outer pipe and an inner pipe is at a height level between an upper portion of the outer pipe and a bottom portion of the well, wherein the annulus axially open past the return pump, wherein the return pump is positioned in the annulus and wherein a return pipe extends through the annulus from the return pump and out of the well.