What is TDH?

  • TDH is a fully-featured torque, drag, and hydraulics modelling package for drilling engineers working in oil, gas, geothermal, and carbon capture environments.
  • TDH is a ground-up redesign of Merlin’s own in-house software, used daily on the world’s most complex wells.
  • TDH allows engineers in the office or in the field to build a model quickly, analyse and interpret results, reducing risk in planning and improving performance during execution.
  • TDH avoids the need for a local computer installation, improving usability and flexibility.
  • TDH is customizable, code-light and ready for easy modification.

Built by Engineers for Engineers

  • As drilling engineers ourselves, we want speed and simplicity from our tools. Time spent building models rather than analysing results is time wasted.
  • If you are an intermittent T,D, and H model user, the last thing you need is to relearn the software from scratch every time. TDH improves on the original version in terms of simplicity and ease of use.
  • TDH incorporates advanced elements of functionality such as scenario comparison tools, advanced rheology correction based on heat flow, casing wear, casing design*, cementing and multifluid analysis* and real-time data streaming*.
  • Model friction reduction tools, floated casing strings and assess tortuosity effects with simple, built-in functionality – no need for complex workarounds.

*Coming soon

Package Options

TDH-Core

Comprehensive torque, drag & hydraulics modelling with cloud-based flexibility.

✔️ Torque, Drag & Hydraulics modelling

✔️ Multiple output options

✔️ Cloud based

✔️ PVT Functionality

✔️ User support included

✔️ Software updates included

Book A Demo

TDH-Plus (Coming Soon)

Advanced modelling, additional casing wear, cementing & design modules.

✔️ Torque, Drag & Hydraulics modelling

✔️ Multiple output options

✔️ Cloud based

✔️ PVT Functionality

✔️ User support included

✔️ Software updates included

✔️ Casing Wear Module

✔️ Cementing Module

✔️  Casing Design Module

Book A Demo

TDH-Live (Coming Soon)

Real-time data streaming & live reporting for enhanced decision-making.

✔️ Torque, Drag & Hydraulics modelling

✔️ Multiple output options

✔️ Cloud based

✔️ PVT Functionality

✔️ User support included

✔️ Software updates included

✔️ Casing Wear Module

✔️ Cementing Module

✔️  Casing Design Module

✔️ Live Data Streaming

✔️ Live plan to actual reporting

✔️ Warnings when near limits

Book A Demo

TDH-Custom

Customised TDH solutions tailored to your exact specification.

Book A Demo

Key Features

  • Runs in-browser. No need for a local installation.
  • Fully featured torque, drag, and hydraulics modelling software – drilling, tripping, back-reaming casing/liner running and floating, and completions.
  • Temperature corrected hydraulics for drilling, swab/surge, ECD modelling, standpipe pressure optimization and more.
  • Quickly compare scenarios to choose the most effective solution.
  • Import data via file or real-time* for comparison or hindcasting.

Ease of Use

  • Flexible and easy to use output reports and charts – templates built in for the most important functions.
  • TDH is highly customizable – we have number of customers that have features tailored for their tools and workflows.
  • TDH is used by operators, multinational and domestic service companies, and tool vendors.
  • Flexible licencing model – choose your duration and number of users.
  • Run in offline mode.

Book a Demo with a Merlin Engineer

Allow one of Merlin’s Senior ERD Engineers to show you around the software, demonstrating how TDH can help you optimize your wells.
Name(Required)
Please provide a short summary of your TDH software requirements.

TDH Clients

TDH is used by operators, multinational and domestic service companies and tool vendors.