Results 101 to 110 of about 1,256 (185)

Study on the Calculation Model of U-tubing Effect in Riserless Mud Recovery Drilling

Shiyou jixie, 2019
The U-tubing effect would occur for the riserless mud recovery (RMR) drilling when stopping pump, making a connection or tripping without drillstring valve.
Jiang Wenlong, Fan Honghai, Ji Rongyi
doaj  

Machine Learning Models for Equivalent Circulating Density Prediction from Drilling Data. [PDF]

ACS Omega, 2021
Gamal H, Abdelaal A, Elkatatny S.
europepmc   +1 more source

DRILLING FLUIDS DIFFERENTIAL STICKING TENDENCY DETERMINATION

Rudarsko-geološko-naftni Zbornik, 2005
Differential sticking is defined as stuck pipe caused by the differential pressure forces from an overbalanced mud column acting on the drillstring against filter cake deposited on a permeable formation.
Katarina Simon, Nediljka Gaurina-Međimurec , Borivoje Pašić   +2 more
doaj  

Research on a Measurement Method for Downhole Drill String Eccentricity Based on a Multi-Sensor Layout. [PDF]

Sensors (Basel), 2021
Li H, Wang R.
europepmc   +1 more source

CASING DRILLING TECHNOLOGY

Rudarsko-geološko-naftni Zbornik, 2005
Casing drilling is an alternative option to conventional drilling and uses standard oilfield casing instead of drillstring. This technology is one of the greatest developments in drilling operations.
Nediljka Gaurina-Međimurec
doaj  

Reaming While Drilling Drillstring Structure Optimization and Application Performance Evaluation

Shiyou jixie, 2016
The reaming tool BHA is the most important controllable factor during reaming while drilling operations,whereas the irrational drill string structure could lead to intensified drill string vibration.In view of this,the drill string-formation finite ...
Zhang Qiang, Fu Jianhong, Li Haoran
doaj  

Vibration behavior analysis of reamers based on drill string dynamics. [PDF]

Sci Rep
Fusheng Y, Yuchun K, Bin L, Qianwen C, Ming S.   +4 more
europepmc   +1 more source

Experimental study and dynamic characteristics analysis of partially liquid-filled annulus tubes. [PDF]

PLoS One, 2018
Sun H, Zhang A, Li H.
europepmc   +1 more source

An analytical model for quantitative evaluation of friction drag in directional sliding drilling. [PDF]

Sci Rep
Ma Z, Zhang H, Hu H, Li G, Tian S, Zhang Y, Wang T.   +6 more
europepmc   +1 more source

The impact of multidirectional excitation on the stick-slip vibration characteristics of a drill string. [PDF]

Sci Rep
Hongshan Z, Wenchang W, Kaixian A.
europepmc   +1 more source