HPHT Onshore Well - Occidental Oman Gas LL - Exploratory HPHT Wells - Sultanate of Oman

The project at a glance

Read about Drill Cool's FX Geo-Cooler™

Immediate risk: surface temperature nearing 180°f / 83°c

Drill Cool Systems installed 2 Geo‑Coolers in parallel maintaining mud pit temperatures to a stable and safe condition.

Project Information

Drilling Conditions

  • Location: Maradi Huraymah field - Oman
  • Block: 62
  • Type: Exploratory HPHT Wells
  • Depth: 15,000-20,000
  • Surface returns: 180°F / 83°C
  • Circulation Rate: Various thru sections

On Drill Cool Solution

Client Testimonial

“Please note that the Drill Cool Mud Coolers™ appear to be operating very well at present and we have been able to maintain temperatures in the 130°F – 140°F for the most part.”

Phil Green - Drilling Fluids Specialist Occidental of Abu Dhabi Ltd. Abu Dhabi UAE

The risks for Drill Cool's Case Study in Oman


There were risks to Personnel
There were risks to Well Control Equipment
There were risks to Surface Equipment
There were risks to Drilling Fluid Stability

Drilling mud was: 50°F /29°C above safe operating temperatures recommended by the ABA of 140°F / 60°C

The solutions for Drill Cool's Case Study in Oman


DCS Engineering Services

Thermal Hydraulic Wellbore Modeling

Wellbore Models

Drill Cool offers in-house Wellbore Modeling Expertise, assisting the client to evaluate the total heat load from the drilling system making solutions clear.

Learn more about wellbore modeling
Drill Cool GEO‑COOLER™

(3 units ran in parallel)

The results for Drill Cool's Case Study in Oman


Surface Mud Return returns were reduced to: 130°F / 54°C

Total reduction to Surface Return Temp: 36°F / 20°C

Results Summary

Above is part of the record from an old well being drilled with WBM. You can see that the flowline temperature was a maximum of 91°C before the mud cooler was rigged up, almost immediately the flowline temp was reduced by 15 -20°C and we were drilling deeper so the flow line temperature would probably have reached about 96°C without the mud cooler. We have seen the flowline temperature as high as 98°C without a mud cooler in the 8 3/8″ section (oil based mud).

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