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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
F
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.
e
:
sayyad@squ.edu.omOil & Gas 2018 &
Petroleum Engineering 2018, Volume 2
DOI: 10.4066/2591-7331-C2-006