Sentence examples for primary cementing from inspiring English sources
Primary cementing involves the Newtonian and non-Newtonian fluid displacements.
An improper performance of displacement work (primary cementing) may cause both financial losses and environmental damage.
Primary cementing constitutes the displacement of a cement slurry in an annular oil well.
The contact between the hydrated cement products and CO2 occurs when it is injected into the well, after the primary cementing or when it is already present in the rock formation.
For primary cementing of a well, successful displacement of drilling mud from the casing and annulus, and properly conditioning those surfaces to bond with the cement slurry, are paramount to achieve zonal isolation.
The experimental animal model where cemented hip prosthesis were implanted with a primary cement mantle defect in sheep lead to early biochemical changes at the implant bone interface that may be triggering the cascade of aseptic loosening of the metal implant.
Due to an unsuccessful primary cement job on the 9 5/8′′ production casing, and subsequent unsuccessful remedial cementations, the casing was heavily damaged to 2200 m depth after many string maneuvers and shocks.
However, even if a good primary cement job is achieved, variations in temperature and pressure over the lifecycle of the well are likely to induce different failure mechanisms that threaten the set cement sealing integrity.
The simulations predict a two-stage evolution of the cement porous matrix, after interaction with acid fluids from reservoir: (i) a first, "clogging" stage, characterized by a decrease in porosity due to calcite precipitation, and (ii) a second stage of porosity reopening, related to the disappearance of primary cement phases, and the re-dissolution of secondary minerals, such as zeolites.
Nevertheless, there was a tendency to have a higher concentration in the group with the primary cement mantle defect.
Significant differences were demonstrated between the 2 groups at 8 months, where the group II with the primary cement mantle defect showed higher activities (P = 0.04).
