Banca de DEFESA: JORGE DANIEL ARAUJO PINTO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JORGE DANIEL ARAUJO PINTO
DATE: 07/08/2020
TIME: 09:00
LOCAL: Sala virtual
TITLE:

Evaluation of the mechanical behavior of Portland-micronized PU blends under vapor injection conditions

KEY WORDS:

Steam Injection, Cementing, Micronized polyurethane.

PAGES: 78
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

Steam injection is an economically viable alternative and it’s widely used for heavy oil recovery in oil wells. In this technique the temperature of the fluids present there is increased and consequently that of the well. This temperature increase causes the dilate of casing, which returns to its initial dimensions with the end of the injection cycle, generating stresses and cracks in the cement sheath. For this reason an appropriate cementation design should be done to avoid future failure of the cement sheath due to thermal stresses. For this goal, this work focused on the addition of a micronized polyurethane powder to the cement mass to increase its mechanical properties such as compressive strength and fracture energy during breakage. For this purpose, were accomplished compressive strength tests and  technological tests in fresh state. Slurries with 0, 1 and 4% polyurethane powder were formulated in addition to the cement and cured at temperatures of 38 ° C and 300 ° C for 1 and 7 days respectively and pressure of 2kpsi for slurries cured at 300 ° C, because they are slurries that simulate the injection of steam. A characterization was also made in SEM, XRD, TG / DTG and DSC. The results showed that the polymer had a good adhesion to the matrix which provided a good strength gain and absorbed energy before the fracture in the order of 75.48% and 61.99% respectively considering the formulation with 1% of the additive under study which was the one that got the best results.

BANKING MEMBERS:
Presidente - 1298936 - ANTONIO EDUARDO MARTINELLI
Externo ao Programa - 1064594 - EVANS PAIVA DA COSTA FERREIRA
Externo à Instituição - KLEBER CAVALCANTI CABRAL - UFERSA
Externo ao Programa - 1754344 - MARCOS ALLYSON FELIPE RODRIGUES
Externo à Instituição - ULISSES TARGINO BEZERRA - IFPB