Mixed form tubular centralizers and method of use

A centralizer for installing about a tubular, the centralizer comprising:

• a resilient inner sleeve arranged circumferentially about the tubular, the inner sleeve having opposing axial ends and a central bore adapted for slidably receiving the tubular therein;
• a tubular outer support body arranged circumferentially about the inner sleeve, the outer support body forming opposing axial ends, a body central bore for receiving the inner sleeve therein and one or more protrusions extending radially outwardly therefrom for engaging the wall of a wellbore, and for spacing the tubular from the wellbore;
• and
• a pair of annular end collars configured to secure to the tubular at opposing axial ends of the support body for preventing axial movement of the support body therebetween, each of the end collars having
• an annular overlap portion having a first diameter section for overlapping a portion of the respective axial ends of the support body and the inner sleeve respectively, the annular overlap portion preventing outward radial movement of the axial ends of the support body from about the tubular;
• and
• a clamping bore portion having a second diameter section for engaging the tubular, the second diameter section being smaller than the first diameter section and corresponding to a diameter of the tubular,
• wherein, when the pair of end collars are installed to the tubular, the axial ends of the support body and the inner sleeve are received within the respective first diameter sections and the second diameter sections form stop shoulders therebetween.