CONTINUOUS WELLBORE DRILLING SYSTEM WITH STATIONARY SENSOR MEASUREMENTS

摘要

The present invention provides continuous or near continuous motion drill strings which include motion sensitive and other MWD sensors which take stationary measurements while the drilling assembly is continuing to drill t he wellbore. For simultaneous continuous drilling and stationary measurements, the present invention provides a drilling assembly wherein a force applicati on system almost continuously applies force on the drill bit while maintaining a housing or drill collar section stationary. Motion sensitive sensors carried by the drill collar take stationary measurements. A steering device between the drill bit and the force application system maintains drilling of the wellbore along a prescribed well path.