oil-gas-petroleum-engineering-2018-accepted

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Journal of Industrial and Environmental Chemistry | Volume 2

December 06 -07, 2018 | Dubai, UAE

Pet roleum Engineer ing, Oil and Gas

International Conference on

Joint Event

Property enhancement of mandrel for SET Applications

Sayyad Zahid Qamar

Sultan Qaboos University, Oman

or more than a decade, solid expandable tubular (SET)

technology has been used for both completion and

production purposes in oil and gas wells. SET helps to increase

fracturing rates, thus resulting in improved conductivity and

superior hydrocarbon production. Expandable tubulars have

also proved their value as an alternative to conventional zonal

isolation techniques. SET technology is built around the cold

expansion of a tubular by forcing through it a conical mandrel

made from a special tool steel. Good design and manufacturing

cannot be achieved without indepth knowledge of the

mechanical properties of the cone material. A test rig has been

designed, fabricated, and commissioned at the Sultan Qaboos

University for full-scale expansion tests of SETs. This facility

uses expansion cones made from AISI D6 steel, which is a high-

carbon high chromium cold-work tool steel. Published work on

D6 steel is mostly focused on surface hardening methods and

wear related issues, rather than heat treatment. Work reported

in this paper is based on devising an optimum heat treatment

strategy for property enhancement of expansion conematerial.

The heat treatment process consists of annealing, hardening/

quenching, followed by single and double tempering.

Mechanical testing includes hardness, tensile properties (yield

strength, ultimate strength, and ductility), and impact strength.

Optimum material properties would ensure dimensional

accuracy of the expanded tubulars and a longer mandrel life.

Oil & Gas 2018 &

Petroleum Engineering 2018, Volume 2

DOI: 10.4066/2591-7331-C2-006