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Multi-stage well isolation and fracturing

Inactive Publication Date: 2015-11-19
RESOURCE COMPLETION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution simplifies the deployment process, reduces rig time, enhances safety, and ensures reliable multi-stage fracturing by eliminating the need for pup joints and threaded connections, while maintaining effective fluid communication and adaptability to various ball sizes.

Problems solved by technology

An important challenge in oil and gas well production is accessing hydrocarbons that are locked in formation and not readily flowing.

Method used

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  • Multi-stage well isolation and fracturing
  • Multi-stage well isolation and fracturing
  • Multi-stage well isolation and fracturing

Examples

Experimental program
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Embodiment Construction

[0018]A frac valve tool is provided that improve on existing ball drop, multi-stage, horizontal fracturing tools, by providing increased safety during installation, reduced rig time and greater dependability in fracing multiple stages in a horizontal section of the wellbore.

[0019]By combining both a slim outside diameter and short length, the present frac valve tool eliminates the need for handling pup joints, thereby reducing the rigidity of the liner. These features permit the more flexible, reduced outside diameter tool string to be deployed into the wellbore with greater ease.

[0020]The present frac valve tools can be lifted by hand and hand threaded onto the liner, which is typically gripped at the rig floor, and then a section of upper liner, typically gripped in an elevator or similar device, can lowered onto the frac valve tool and the one piece body of the frac valve tool allows torque to be applied from the upper liner section, through the frac valve tool and into the liner...

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PUM

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Abstract

In a first aspect, a frac valve tool is taught, said tool comprising one or more ports a sleeve movable between a closed position in which the sleeve prevents fluid flow through said one or more ports and an open position in which the sleeve allows fluid flow through said one or more ports and a ball receiving seat removably connected to the sleeve wherein receipt of a ball on the ball receiving seat moves said seat and said sleeve from closed to open positions. In a second aspect, a frac valve tool is taught, said tool comprising a ball receiving seat removably received within said tool, said seat comprising a seating profile for receiving a ball; wherein said seating profile matches a radius of said ball to nondeformably grip said ball.

Description

FIELD OF INVENTION[0001]The present invention relates to devices for multi-stage, horizontal well isolation and fracturing.BACKGROUND OF THE INVENTION[0002]An important challenge in oil and gas well production is accessing hydrocarbons that are locked in formation and not readily flowing. In such cases, treatment or stimulation of the formation is necessary to fracture the formation and provide passage of hydrocarbons to the wellbore, from where they can be brought to the surface and produced.[0003]Fracturing of formations via horizontal wellbores traditionally involves pumping a stimulant fluid through either a cased or open hole section of the wellbore and into the formation to fracture the formation and produce hydrocarbons therefrom.[0004]In many cases, multiple sections of the formation are desirably fractured either simultaneously or in stages. Tubular strings for the fracing of multiple stages of a formation typically include one or more fracing tools separated by one or more...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B34/12
CPCE21B2034/007E21B34/12E21B33/1285E21B34/14E21B2200/06E21B33/1216E21B34/103
Inventor HUGHES, JOHNRASMUSSEN, RYAN D.SCHMIDT, JAMES W.
Owner RESOURCE COMPLETION SYST