Selecting a Coiled Tubing Unit for CTD: Part Two

Following on from , this article continues to explore the areas required to select a suitable CT unit for Coiled Tubing Drilling operations.

Price & Performance

Price is the obvious one! However, the cost is never the only consideration and care should be taken to review the CTU provider’s performance history. Furthermore, you should look at their accident and incident records and their safety culture. CTD should always be considered as a technology that offers a high return on investment but this does not necessarily mean the lowest upfront cost.

A CTU provider may choose to charge in a number of ways. This could include a basic day rate with itemised charges for elements such as coil fatigue, mobilisation for example. Both the Operator and the CTU provider should be fully aware of exactly how the CT is going to be used i.e. the unique drilling practices associated with CTD.

Pressure Control Equipment (PCE)

Careful consideration must be given to the PCE and its pressure rating. A CTU provider may work on wells under a variety of pressures and so should have a selection of BOP stacks and other PCE available. The PCE must be selected in accordance with the expected well pressures and operations. All potential well control scenarios should be considered in a risk assessment along with the selected PCE.

Data Requirements

The quantity of data that it is possible to capture from a CTD project is vast. Serious consideration needs to be given to what information you would like to capture and how this can be achieved with the chosen CTU provider. Your CTD BHA provider should be able to provide the requested data acquisition services for all the services onsite if required. Choosing a CTU that has advanced data acquisition and transmission systems will facilitate displaying data to the interested parties whether you use the BHA provider as a hub or the CTU provider.

Completion Type

The operations that are carried out before and after drilling an open-hole section with coiled tubing can have extremely significant cost impacts. If there is a requirement to pull completion tubing before drilling and/or to run completion tubulars after drilling, then a workover unit may need to be used. This inevitably adds extra mobilisation costs and rig up/down time. The most effective way to carry out operations on wells like this is to utilise a hybrid CT unit. Whilst these units are capable of running pipe as well as coiled tubing, they are quite rare. However, if utilised, they can have significant, positive impacts on the economics of the well.

Author: Adam Miszewski

Read more

How To Achieve Step-By-Step Energy Transition
Read More
AnTech
Case Study: Longest Lateral Drilled in 24hrs on the North Slope using at-balance CTD
Read More
AnTech
Case Study: Coiled Tubing Drilling, Kuparuk Oilfield, North Slope Alaska (SPE 168250)​
Read More
AnTech
Case Study: Western Australia UBCTD Project That Boosts Oil Production
Read More
AnTech
Case Study: UBCTD That Enables Real-Time Decision Making
Read More
AnTech
Benefits Of Underbalanced Coiled Tubing Drilling
Read More
AnTech
Coiled Tubing String Retirement​
Read More
AnTech
Coiled Tubing: Repeated Bend Cycling And Microcracks​
Read More
AnTech
Understanding Coiled Tubing Fatigue Damage And Its Influencing Factors​
Read More
AnTech
Underbalanced Coiled Tubing Drilling in Tight Sandstone Case Study: Part Two​
Read More
AnTech
Underbalanced Coiled Tubing Drilling in Tight Sandstone Case Study: Part One
Read More
AnTech
Underbalanced Offshore Coiled Tubing Drilling Case Study: Part Three
Read More
AnTech
Underbalanced Offshore Coiled Tubing Drilling Case Study: Part Two​
Read More
AnTech
Underbalanced Offshore Coiled Tubing Drilling Case Study: Part One
Read More
AnTech
Possible use of Tractors for Coiled Tubing Drilling
Read More
AnTech
Cryogenic vs Membrane Nitrogen in CT Applications: The Big Picture
Read More
AnTech
Casing Exits For Coiled Tubing Drilling Operations
Read More
AnTech
Real-time, at-bit Geosteering for Coiled Tubing Drilling​
Read More
AnTech
Find Your Reason Why: Well Selection For UBCTD​
Read More
AnTech
What Is An Orienter?​
Read More
AnTech
Convert Your CT Unit To E-Coil​
Read More
AnTech
Reservoir Characterisation While Drilling Underbalanced​
Read More
AnTech
The Importance Of A Gyro In A Coiled Tubing Drilling BHA
Read More
AnTech
Modelling And Visualisation Of Drilling A Horizontal Well​
Read More
AnTech
Exploring The Mechanism Of Coiled Tubing Lock-Up
Read More
AnTech
Exploring The Mechanism Of Coiled Tubing Lock-UpExploring The Mechanism Of Coiled Tubing Lock-Up
Read More
AnTech
Applications For Coiled Tubing Drilling​
Read More
AnTech
Horizontal Directional Drilling: What's The Benefit?
Read More
AnTech
Why A Gyro System Is So Important For Horizontal Directional Drilling​
Read More
AnTech
Lesson 101: Setting Up And Operating A Test Facility For HPHT Equipment​
Read More
AnTech
The Importance Of Near Bit Sensors For Coiled Tubing Drilling​
Read More
AnTech
How To Drill An Openhole Sidetrack With Coiled Tubing Drilling
Read More
AnTech
Combating Lost Circulation Using Underbalanced Drilling & CTD​
Read More
AnTech
How Do You Drill A Directional Well With Coiled Tubing?​
Read More
AnTech
Why A Milling Monitoring Tool Is A Good Friend To Have On Plug Mill-Out Operations​
Read More
AnTech
How To Drill Faster With Coiled Tubing​
Read More
AnTech
Introduction to CTD Wellbore Hydraulic Modelling - Part Two​
Read More
AnTech
Selecting a Coiled Tubing Unit for CTD: Part One
Read More
AnTech
Introduction To CTD Wellbore Hydraulic Modelling - Part One
Read More
AnTech
How Computational Modelling Contributes To Planning A Successful CTD Campaign
Read More
AnTech
Jointed Pipe Versus Coiled Tubing Underbalanced Drilling​
Read More
AnTech
Ben​efits Of Drilling A Straight Hole With Coiled Tubing Drilling​
Read More
AnTech
Leading The Way - Quality Control Of Directional Measurements
Read More
AnTech
Why A Downhole WOB Sensor Is So Important When Drilling With CT
Read More
AnTech
What Is Underbalanced Drilling & How Does It Work?
Read More
AnTech

Search