DUBAI, Dec 17 (Reuters) - ADNOC Drilling

, a unit of the United Arab Emirates' state oil

giant, said on Tuesday it has closed an agreement to create

Turnwell Industries, a joint venture with oilfield services

firms SLB and Patterson-UTI.

ADNOC Drilling holds 55% in the firm, created to tap

unconventional energy resources - oil and gas that requires

advanced extraction methods. SLB has a 30% stake and

Patterson-UTI owns 15%.

Abu Dhabi has an estimated 220 billion barrels of

unconventional oil and 460 trillion cubic feet of unconventional

gas, ADNOC Drilling said.

Earlier this year, the company secured a $1.7 billion

contract from parent ADNOC for drilling and associated services

of 144 unconventional oil and gas wells and said it would set up

Turnwell to execute it.

"Turnwell will leverage cutting-edge innovations in AI smart

drilling design, completions engineering, and production

solutions to responsibly deliver and secure the UAE's

unconventional energy needs and resources," ADNOC Drilling said.

Turnwell also benefits from a direct relationship with

Enersol, ADNOC Drilling's JV with Alpha Dhabi, a subsidiary of

International Holding Company (IHC).

IHC is part of a business empire overseen by its chair,

Sheikh Tahnoon bin Zayed al-Nahyan, who is also the UAE's

national security adviser and a brother of the country's

president.

Enersol, which invests in technology for the energy sector,

has made four acquisitions this year.

(Reporting by Yousef Saba; Editing by Mrigank Dhaniwala)