Plug insert for a frac plug tool and method of assembling thereof
AssigneeHalliburton Energy Services, Inc.
InventorsDavid J. Wilcox, Kevin B. Chaffer
Life of this patent
Estimating the term…
Abstract
A plug insert for use in a frac plug tool comprising a plug top, a plug body and an elastomeric O-ring, The plug top is shaped to rest on a seat of an upper end of a mandrel of the frac plug tool and the plug body is shaped to fit in a flow passage of the mandrel wherein the plug body includes a shear pin opening. The elastomeric O-ring is locatable around a portion of the plug body and sized to block fluid flow through the flow passage of the mandrel when the plug body is located in the flow passage. A frac plug tool for use in a well comprising the plug insert and a shear pin to hold that insert above the mandrel seat of the tool and method of assembling the tool are also disclosed.
Claims20
A plug insert for use in a frac plug tool, comprising:
- a plug top shaped to rest on a seat of an upper end of a mandrel of the frac plug tool;
- a plug body shaped to fit in a flow passage of the mandrel wherein the plug body includes a shear pin opening;
- and
- an elastomeric O-ring locatable around a portion of the plug body, the elastomeric O-ring sized to block fluid flow through the flow passage of the mandrel when the plug body is located in the flow passage, wherein the plug insert is configured to pass down through the flow passage of the mandrel when located in a wellbore at a pressure differential above a hydraulic fracturing pressure differential between formation intervals of the wellbore located above and below the frac plug tool.
A frac plug tool for use in a well, comprising:
- a mandrel having a flow passage there through, an upper end of the mandrel having a seat;
- a plug insert having a plug body, a plug top, and an elastomeric O-ring, wherein:
- the plug top is shaped to rest on the seat;
- the plug body is shaped to fit inside of the flow passage of the mandrel, wherein the plug body includes a shear pin opening, and
- the elastomeric O-ring is locatable around a portion of the plug body, the elastomeric O-ring sized to block fluid flow through the flow passage of the mandrel when the plug body is located in the flow passage;
- and
- a shear pin, an end portion of the shear pin configured to pass through a sidewall opening in an upper end of the mandrel and into an opening of the plug body such that the plug top is held above the seat when the plug body is located in the flow passage.
A method of assembling a frac plug tool for use in a wellbore, comprising:
- providing a mandrel having a flow passage there-through, an upper end of the mandrel having a seat;
- providing a plug insert having a plug top, plug body and elastomeric O-ring;
- connecting the plug insert to the upper end of the mandrel, wherein the plug body is located inside of the flow passage, the plug top is shaped to rest on the seat and the elastomeric O-ring, located around a portion of the plug body, is configured block fluid flow through the flow passage of the mandrel;
- and
- inserting an end portion of a shear pin through a sidewall opening in the upper end of the mandrel and into an opening of the plug body, such that the plug top is held above the seat.
A plug insert for use in a frac plug tool, comprising:
- a plug top shaped to rest on a seat of an upper end of a mandrel of the frac plug tool;
- a plug body shaped to fit in a flow passage of the mandrel wherein the plug body includes a shear pin opening;
- an elastomeric O-ring locatable around a portion of the plug body, the elastomeric O-ring sized to block fluid flow through the flow passage of the mandrel when the plug body is located in the flow passage;
- and
- a shear pin, an end portion of the shear pin configured to pass through a sidewall opening in an upper end of the mandrel and into an opening of the plug body such that the plug top is held above the seat when the plug body is located in the flow passage.
Dependencies are inferred from the claim text.