26th July 2017
When planning an openhole sidetrack there are a number of choices to be made which will affect the ease and speed at which the . . .
21st July 2017
A On November 20, 1980, Leonce Viator Jr, accompanied by his nephew, took his boat out onto Lake Peigneur in Louisiana to catch some catfish. At the same . . .
12th July 2017
A Directional Coiled Tubing Drilling (DCTD) BHA is made up of the following components: bit, motor/turbine with bent housing, sensor module . . .
5th July 2017
Frac plug milling is the final step on the journey to completing a shale producer. Return on the investment that has gone in to drilling the well and pumping the . . .
28th June 2017
We often get asked what is the effect of underbalance on ROP, so it’s nice to have a real-life example which shows the difference it can make. In this example . . .
22nd June 2017
In my last blog post I introduced the principles of hydraulic modelling for coiled tubing drilling. I left you with this beautiful chart, depicting . . .
24th Apr 2017
19th Apr 2017
In order to select an appropriate coiled tubing unit (CTU) and CTU provider for CTD operations, a few key steps must be taken, with focus on . . .
29th Mar 2017
In the last article I introduced the importance of modelling in the context of Coiled Tubing Drilling and explored how fit-for-purpose . . .
17th Feb 2017
As anyone with a succession of successfully executed Coiled Tubing Drilling jobs under their belt might tell you, ‘Coiled Tubing Drilling is . . .
1st Feb 2017
Underbalanced drilling (UBD) is defined as drilling when the effective downhole circulating pressure of the drilling fluid is equal to. . .
25th Jan 2017
In conventional directional drilling with a bent-sub motor the well trajectory is drilled with a combination of sliding stages and rotating stages. This . . .
28th Nov 2016
A direct measurement of downhole weight-on-bit is vital for accurate control of the drilling process during Coiled Tubing Drilling. Without it. . .
28th Nov 2016
Underbalanced drilling is when the pressure in the formation is greater than the hydrostatic pressure in the bore hole. This difference in. . .