Fluid loss device including a self-opening upside down flapper valve
AssigneeHalliburton Energy Services, Inc.
InventorsIbrahim El Mallawany, Francois Chevallier
Life of this patent
Estimating the term…
Abstract
Provided is a fluid loss device, a well system, and a method for fracturing a well system. The fluid loss device, in this aspect, includes a dissolvable member coupled to an opening sleeve, the dissolvable member operable to fix the opening sleeve in a first opening sleeve position when an internal prop sleeve is in the first prop sleeve position and for a period of time after the internal prop sleeve moves to the second prop sleeve position, and then dissolve triggering the opening sleeve to move from the first opening sleeve position to the second opening sleeve position.
Claims25
A fluid loss device, comprising:
- a wellbore tubular having an uphole region and a downhole region;
- a flapper seat coupled to the wellbore tubular;
- a flapper associated with the flapper seat, the flapper operable to rotate between an open position wherein a distal tip of the flapper is pointed toward the uphole region and a closed position wherein the distal tip of the flapper engages with the flapper seat;
- an opening sleeve located in the wellbore tubular, the opening sleeve operable to move from a first opening sleeve position allowing the flapper to remain in the closed position to a second opening sleeve position pushing and holding the flapper in the open position;
- and
- a dissolvable member coupled to the opening sleeve, the dissolvable member operable to fix the opening sleeve in the first opening sleeve position when the flapper is in the open position and for a period of time after the flapper moves to the closed position, and then dissolve triggering the opening sleeve to move from the first opening sleeve position to the second opening sleeve position to push and hold the flapper in the open position, wherein the dissolvable member is located within a chamber positioned between the opening sleeve and the wellbore tubular and isolated from wellbore fluid when the flapper is in the open position.
A well system, comprising:
- a wellbore extending through one or more subterranean formations;
- a wellbore tubular located within the wellbore, the wellbore tubular having one or more fracturing ports located at a fracturing zone of interest;
- and
- a fluid loss device positioned proximate the fracturing zone of interest, the fluid loss device, including:
- a flapper seat coupled to the wellbore tubular;
- a flapper associated with the flapper seat, the flapper operable to rotate between an open position wherein a distal tip of the flapper is pointed uphole and a closed position wherein the distal tip of the flapper engages with the flapper seat;
- an opening sleeve located in the wellbore tubular, the opening sleeve operable to move from a first opening sleeve position allowing the flapper to remain in the closed position to a second opening sleeve position pushing and holding the flapper in the open position;
- and
- a dissolvable member coupled to the opening sleeve, the dissolvable member operable to fix the opening sleeve in the first opening sleeve position when the flapper is in the open position and for a period of time after the flapper moves to the closed position, and then dissolve triggering the opening sleeve to move from the first opening sleeve position to the second opening sleeve position to push and hold the flapper in the open position.
A method for fracturing a well system, comprising:
- positioning a fluid loss device within a wellbore extending into one or more subterranean formations, the fluid loss device located in a wellbore tubular and proximate a fracturing zone of interest in the wellbore, the fluid loss device including;
- a flapper seat coupled to the wellbore tubular;
- a flapper associated with the flapper seat, the flapper operable to rotate between an open position wherein a distal tip of the flapper is pointed uphole and a closed position wherein the distal tip of the flapper engages with the flapper seat;
- an internal prop sleeve located in the wellbore tubular, the internal prop sleeve operable to move from a first prop sleeve position holding the flapper in the open position to a second prop sleeve position allowing the flapper to rotate to the closed position;
- an opening sleeve located in the wellbore tubular, the opening sleeve operable to move from a first opening sleeve position allowing the flapper to remain in the closed position when the internal prop sleeve is in the second prop sleeve position and to a second opening sleeve position pushing and holding the flapper in the open position when the internal prop sleeve is in the second prop sleeve position;
- and
- a dissolvable member coupled to the opening sleeve, the dissolvable member operable to fix the opening sleeve in the first opening sleeve position while the internal prop sleeve is in the first prop sleeve position and for a period of time after the internal prop sleeve moves to the second prop sleeve position, and then dissolve triggering the opening sleeve to move from the first opening sleeve position to the second opening sleeve position;
- withdrawing the internal prop sleeve uphole, the withdrawing allowing the flapper to move from the open position to the closed position, and activation fluid to encounter the dissolvable member and begin a dissolving process;
- and
- fracturing the fracturing zone of interest with the flapper in the closed position, and then after a period of time the activation member dissolving and allowing the opening sleeve to move from the first opening sleeve position to the second opening sleeve position and pushing and holding the flapper in the open position.
A fluid loss device, comprising:
- a wellbore tubular having an uphole region and a downhole region;
- a flapper seat coupled to the wellbore tubular;
- a flapper associated with the flapper seat, the flapper operable to rotate between an open position wherein a distal tip of the flapper is pointed toward the uphole region and a closed position wherein the distal tip of the flapper engages with the flapper seat;
- an internal prop sleeve located in the wellbore tubular, the internal prop sleeve operable to move from a first prop sleeve position holding the flapper in the open position to a second prop sleeve position allowing the flapper to rotate to the closed position
- an opening sleeve located in the wellbore tubular, the opening sleeve operable to move from a first opening sleeve position allowing the flapper to remain in the closed position when the internal prop sleeve is in the second prop sleeve position and to a second opening sleeve position pushing and holding the flapper in the open position when the internal prop sleeve is in the second prop sleeve position;
- and
- a dissolvable member coupled to the opening sleeve, the dissolvable member operable to fix the opening sleeve in the first opening sleeve position when the flapper is in the open position and for a period of time after the flapper moves to the closed position, and then dissolve triggering the opening sleeve to move from the first opening sleeve position to the second opening sleeve position to push and hold the flapper in the open position.
Dependencies are inferred from the claim text.