Case Study: Longest Lateral Drilled in 24hrs on the North Slope using at-balance CTD
21st Sept 2020
The two wells under consideration in this case study were injection wells. Extended reach laterals in a sand formation were planned with the . . .
10th July 2020
North Slope Alaska can boast one of the largest numbers for wells drilled using Coiled Tubing Drilling technology. As redevelopment of . . .
26th May 2020
This blog describes a Directional Coiled Tubing Drilling job that was performed in Western Australia. A multi-lateral well was . . .
1st May 2020
This blog focuses on the capabilities of Underbalanced Coiled Tubing Drilling (UBCTD) demonstrated in a project led by AnTech in . . .
16th January 2020
Underbalanced drilling (UBD) is an important technique for drilling mature fields with pressure-depleted reservoirs, narrow pressure windows and/or . . .
21st August 2019
Fatigue life modeling has extended the economic life of Coiled Tubing (CT), making the ability to predict the safe working life of . . .
17th July 2019
Fatigue life measurements appear to be a statistical phenomenon, which makes the measurement of the fatigue life of the Coiled Tubing (CT) string to . . .
12th Jun 2019
Coiled Tubing (CT) has been widely used for well intervention, servicing and drilling. It has become widely used due to its . . .
23rd Jan 2019
In a recent blog post we looked at how Underbalanced Coiled Tubing Drilling (UBCTD) has the potential to offer a more than viable method of . . .
9th Jan 2019
The low permeability of tight sandstone means it is notoriously difficult to achieve a productive well economically. However, it has been . . .
28th Nov 2018
With underbalanced drilling there is some additional equipment to be considered and installed. The usual coil equipment such as the . . .
21st Nov 2018
With a preliminary trajectory planned and the well pressures defined, the mechanical aspects of the coiled tubing drilling operation can now be . . .
14th Nov 2018
On a Monday morning, after the operational meetings, my boss walks into our cubicle and drops a pile of paper work, including some old . . .
10th Oct 2018
Directional Coiled Tubing Drilling (DCTD) is a highly effective and efficient method of accessing tight and isolated reservoirs. The ability to drill extended . . .
28th Sept 2018
For many drilling operations within the upstream oil and gas industry, nitrogen is an essential consumable and is required in significant quantities. In particular . . .
13th June 2018
Many wells drilled with underbalanced coiled tubing drilling (UBCTD) require a casing exit system to create a window in the original well through . . .
18th Apr 2018
When drilling a directional well, predicting the exact position of a target reservoir from surface is difficult. Logs from . . .
11th Apr 2018
A directional coiled tubing drilling string comprises a number of highly specialised components working in unison. One of the more interesting components is . . .
28th Mar 2018
A directional coiled tubing drilling string comprises a number of highly specialised components working in unison. One of the more interesting components is . . .
8th Feb 2018
Upgrading a coiled tubing unit to e-coil can add valuable versatility to a company’s service offering. The ability to transmit and . . .
1st Feb 2018
Drilling underbalanced on coiled tubing provides a treasure trove of information on reservoir characteristics and . . .
6th Dec 2017
If you've spent any time looking into directional measurement instruments, and particularly gyros then you'll know that there are two main types of . . .
29th Nov 2017
Let us recall that in academic and engineering contexts, a model is a construct which encapsulates the essential features of a . . .
2nd Nov 2017
Lock-up in CT is like death and taxes, it’s an inevitability of life. If you are going to try and set weight at the end of CT, the amount of weight you . . .
18th Oct 2017
With over 70% of the world’s oil and gas production being produced from mature fields, it’s not surprising that operators are looking at . . .
11th Oct 2017
Since the early days of the oil industry, operators have been drilling vertical wells to tap oil and gas reservoirs. The advantages are . . .
27th Sept 2017
Coiled Tubing Drilling is increasing in demand which is creating the need for tools to have higher downhole capabilities. Specifically, the . . .
19th Sept 2017
There is a reason why the drivers of 18-wheeler trucks are seated at the front of the vehicle. It’s so the drivers can steer the vehicle accurately between . . .
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 . . .
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. . .
+44 1392 933 100 | +1 800-868-1562