Centralizer with integral stop collar
AssigneeCentergenics, LLC
InventorNapoleon Arizmendi
Life of this patent
Estimating the term…
Abstract
A centralizer is disclosed. The centralizer includes a bow spring body having a plurality of bows. The centralizer also includes a first collar assembly located at a first end of the bow spring body. The centralizer further includes a second collar assembly located at a second end of the bow spring body. Each collar assembly includes a grip ring that is configured to move from a retracted position to an engaged position, wherein the bow spring body, the first and the second collar assembly may move axially relative to the grip ring when in the engaged position.
Claims20
A centralizer for use with a casing, comprising:
- a bow spring body having a plurality of bows;
- a first collar assembly located at a first end of the bow spring body;
- and
- a second collar assembly located at a second end of the bow spring body, wherein each collar assembly includes a grip ring that is configured to move from a retracted position to an engaged position, and wherein the bow spring body, the first and the second collar assembly may move axially relative to the grip ring when in the engaged position.
A method of using a centralizer on a casing, the method comprising:
- placing the centralizer on the casing, wherein the centralizer includes bows and a grip ring;
- releasing the grip ring to allow the grip ring to contact the casing;
- energizing the grip ring by moving the centralizer in an axial direction relative to the grip ring;
- and
- allowing the centralizer to rotate and move axially relative to the grip ring and the casing.
A centralizer for use with a casing in a wellbore, comprising:
- a bow spring body having a plurality of bows;
- a first collar assembly located at a first end of the bow spring body;
- and
- a second collar assembly located at a second end of the bow spring body,
- wherein each collar assembly includes:
- a grip ring configured to move from a retracted position to an engaged position;
- and
- a radial gap between an inner surface of the collar assembly and an outer surface of the casing, wherein the radial gap allows upset ends of the bows to transfer a side load to the grip ring while preventing the bows from contacting the casing when the bows are compressed by a wellbore restriction;
- and
- wherein the bow spring body, the first collar assembly, and the second collar assembly are configured to move axially relative to the grip ring when the grip ring is in the engaged position.
Dependencies are inferred from the claim text.