How To Run Mixed Lower Completion String To Bottom in Deepwater Extended-Reach Well

By: Florent COULIOU This ERD well in a Deepwater field has reached TD after 22 days. Tens of millions of dollars have been spent already. Now comes the tricky part: running the lower completion string. This is to connect the wellbore to the reservoir. If something goes wrong, those tens of millions of dollars will […]

How to get out of a predicament of an unexpected side-track

A geothermal well doublet producing from a 75°C aquifer, had been operated for over 29 years. The last calliper run performed to control the ID of the 9 5/8” casing indicated there was corrosion and sediments clogging the inner side walls of the injector well, which was hindering production. To regain well integrity, a workover was performed to clean out the 9 5/8” casing in order to reline it. During the workover operations, a cement squeeze-flash occurred causing the 3 ½” drill string being stuck in hole. Remedial operations using coiled tubing was stopped after over two weeks of unsuccessful attempts. The injector well was then suspended with a cement plug set on top of the fish.

DrillScan attending the SPE/IADC Drilling Conference & Exhibition, 29-31 Jan 2018, Abu Dhabi , UAE

DrillScan will be on SPE/IADC Middle East Drilling Technology Conference and Exhibition (29-31 Jan 2018)
Jumeirah at Etihad Towers Abu Dhabi , UAE

Please visit our booth #19

Continuous Inclination Measurements and BHA Modeling Help Detect Microdoglegs

Microdoglegs are a natural effect of any vertical or directional well that can explain a wide variety of downhole problems. A trajectory-prediction model able to calculate the inclination and azimuth approximately every 12 in. has been developed to estimate microdoglegs using standard surveys, bottomhole-assembly (BHA) data, and steering parameters. This new methodology combining downhole data measurements with drillstring-modeling analysis highlights the potential for drilling optimization and wellbore placement.