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US 8,783,341 B2Granted
Composite cement retainer
OwnerW. Lynn Frazierinventor
Life of this patent
Estimating the term…
Abstract
A downhole plug includes a body and an element system disposed about the body. The plug further includes a first and second back-up ring member having two or more tapered wedges. The tapered wedges are at least partially separated by two or more converging grooves. First and second cones are disposed adjacent the first and second back-up ring members.
Claims23
A tool for use in a wellbore, comprising:
- an element system;
- a slip;
- a first back-up ring member positioned between the element system and the slip, wherein an outer surface of the first back-up ring member has a groove formed thereabout that allows a portion of the first back-up ring member to pivot radially outward during expansion;
- a housing having first, second, and third shoulders disposed on an inner surface thereof, wherein the shoulders are spaced axially apart from one another;
- and
- a collet disposed within the housing, the collet comprising:
- a body comprising a section having an enlarged outer diameter, the body adapted to slide between first and second positions, wherein a first axial end of the section abuts the second shoulder when the body is in the first position, and the section mates with the third shoulder when the body is in the second position;
- and
- two or more fingers coupled to the body, the end of each finger having an enlarged outer diameter, wherein the end mates with the first shoulder when the body is in the first position.
6 more elements
A tool for use in a wellbore, comprising:
- an element system;
- a slip;
- a first back-up ring member positioned between the element system and the slip, wherein an outer surface of the first back-up ring member has a groove formed thereabout that allows a portion of the first back-up ring member to pivot radially outward during expansion;
- a housing having first, second, and third shoulders disposed on an inner surface thereof, wherein the shoulders are spaced axially apart from one another;
- and
- a collet disposed within the housing, the collet comprising:
- a body comprising a section having an enlarged outer diameter, the body adapted to slide between first and second positions, wherein the section mates with the second shoulder when the body is in the first position, wherein the second shoulder prohibits axial movement of the section of the body past the second shoulder, wherein the section mates with the third shoulder when the body is in the second position, and wherein the third shoulder prohibits axial movement of the section of the body past the third shoulder;
- and
- two or more fingers coupled to the body, the end of each finger having an enlarged outer diameter, wherein the end mates with the first shoulder when the body is in the first position, and wherein the two or more fingers slide axially past the first shoulder when the body moves from the first position to the second position.
6 more elements
A plug for use in a wellbore, comprising:
- an element system;
- a slip;
- a first back-up ring member positioned between the element system and the slip, wherein an outer surface of the first back-up ring member has a groove formed thereabout that allows a portion of the first back-up ring member to pivot radially outward during expansion;
- a housing having first, second, and third shoulders disposed on an inner surface thereof, the shoulders spaced axially apart from one another;
- and
- a collet disposed within the housing, the collet comprising:
- a body including a section having an outer diameter that is enlarged with respect to another section of the body, the body being adapted to slide between open and closed positions, wherein the body mates with the second shoulder when the body is in the closed position, wherein the second shoulder abuts a first axial end of the section of the body when the body is in the closed position, wherein the body mates with the third shoulder when the body is in the open position, and wherein the third shoulder abuts a second axial end of the section of the body when the body is in the open position;
- and
- a plurality of fingers extending axially from the body and including a first end having an outer diameter that is larger than a remaining portion of the fingers, the first end adapted to engage the first shoulder of the housing when the body is in the closed position,
- wherein the collet and the housing each have one or more ports formed therethrough, wherein at least one port on the collet substantially aligns with at least one port on the housing when the collet is in the open position, and wherein the third shoulder is positioned in the housing such that the section of the body mating with the third shoulder prevents the port in the collet from passing the port in the housing.
7 more elements
A downhole tool, comprising:
- a tool body having a non-metallic element system disposed thereabout, the element system being sealable against a wellbore;
- a slip disposed about the tool body;
- a first back-up ring member positioned between the element system and the slip, wherein an outer surface of the first back-up ring member has a groove formed thereabout that allows a portion of the first back-up ring member to pivot radially outward during expansion;
- a housing coupled to the tool body and extending axially therefrom, the housing comprising:
- a first section having first and second shoulders disposed on an inner surface thereof, and one or more housing ports formed through the first section;
- and
- a second section having a third shoulder disposed on an inner surface thereof;
- and
- a collet disposed within the housing, the collet comprising:
- a body including a section having an enlarged outer diameter and first and second axial ends, the body being adapted to slide between open and closed positions, wherein the first axial end is adapted to abut the second shoulder when the body is in the closed position and the second axial end is adapted to abut the third shoulder when the body is in the open position;
- one or more collet ports formed through the body and positioned such that when the body is in the open position the one or more collet ports are substantially aligned with the one or more housing ports;
- and
- a plurality of fingers extending axially from the body and including a first end having an enlarged outer diameter, the first end adapted to engage the first shoulder of the housing when the body is in the closed position and to slide past the first shoulder when the body slides toward the open position.
10 more elements
Dependencies are inferred from the claim text.