Downhole anchoring tools conveyed by non-rigid carriers
AssigneeSchlumberger Technology Corporation
InventorsSimon L. Farrant, Jerry D. Campbell, James S. Almaguer, Kuo-Chiang Chen
Life of this patent
Estimating the term…
Abstract
An apparatus and method provides an anchor device for use in a wellbore that comprises an actuator assembly responsive to an actuating signal, an operator coupled to the actuator assembly, and an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device. The anchor device may be employed in various tool strings, such as a perforating tool string. In one arrangement, the anchor device provides an automated retraction mechanism that is activated after a predetermined delay. In another arrangement, a retract signal may be supplied to activate the retraction mechanism.
Claims52
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device, and
- wherein the actuator assembly comprises a release assembly having a detonator initiable by the actuating signal to enable movement of the operator.
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device,
- wherein the operator comprises an energy source and a setting mandrel moveable by the energy source, and
- wherein the energy source comprises a material ignitable to produce a high pressure gas.
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device,
- wherein the operator comprises an energy source and a setting mandrel moveable by the energy source, and
- wherein the energy source comprises a bottle containing pressurized gas.
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device,
- wherein the operator comprises a motor and an actuating rod rotatable by the motor to move the engagement assembly.
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device;
- a second actuator responsive to a retract signal;
- and
- a retraction operator actuatable by the second actuator to retract the engagement member.
An anchor device for use in a wellbore, comprising:
- an actuator assembly responsive to an actuating signal:
- an operator coupled to the actuator assembly;
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device;
- and
- a jarring mechanism to enable jarring of the anchor device to aid in retraction of the engagement member.
A method for use in a wellbore, comprising:
- lowering a tool string on a non-rigid carrier into the wellbore;
- and
- transmitting a signal over the non-rigid carrier to set an anchor in the string,
- wherein the transmitting comprises moving a slickline that is receivable by a motion transducer coupled to the anchor.
A method for use in a wellbore, comprising:
- lowering, on a non-rigid carrier, a perforating gun string into the wellbore;
- setting an anchor device in the string to maintain an axial position of the perforating gun string;
- increasing the pressure in a portion of the wellbore to a predetermined level to create an overbalance condition;
- and
- activating the perforating gun string to create perforations in a surrounding formation.
An apparatus for use in a wellbore, comprising:
- a shock-sensitive instrument;
- an explosive device;
- and
- an anchor between the shock-sensitive instrument and the explosive device, the anchor settable in the wellbore, wherein shock generated by activation of the explosive is dissipated by the anchor to a surrounding structure to protect the instrument from shock.
A method for use in a wellbore, comprising:
- providing a string including a perforating gun and an anchor device;
- lowering the string into the wellbore;
- and
- setting the anchor device to place the perforating gun in a substantially eccentric position in the wellbore.
An apparatus for use in a wellbore, comprising:
- a tool;
- and
- an anchor device having engagement members adapted to engage a generally tubular structure in the well bore, the engagement members adapted to extend outwardly radially, at least a first engagement member adapted to extend by a first radial distance, and at least a second engagement member adapted to extend a second, greater radial distance to place the tool in an eccentric position in the wellbore.
A gun stack system, comprising:
- a plurality of gun sections;
- a first anchor attached to a distal gun section;
- a second anchor attached to a proximal gun section;
- and
- a non-rigid carrier coupled to the second anchor, the second anchor adapted to be set by a signal carried over the non-rigid carrier.
An anchor device for use in a wellbore having a liner, comprising:
- an energy source comprising a gas bottle containing pressurized gas, the gas bottle comprising a release element to release the pressurized gas upon activation by an input signal;
- an operator actuatable by the energy source in response to the input signal;
- and
- a slip moveable by the operator to a set position to engage the liner.
An anchor device for use in a wellbore having a liner, comprising:
- an energy source;
- an operator actuatable by the energy source in response to an input signal;
- and
- a slip moveable by the operator to a set position to engage the liner,
- wherein the energy source comprises an element to convert heat energy to pressure.
A downhole tool for use in a wellbore, comprising:
- an element;
- a setting mechanism adapted to set the element;
- and
- a retract mechanism adapted to retract the element after a predetermined delay time period, the retract mechanism comprising a delay component to provide the predetermined delay time period.
A method for use in a wellbore, comprising:
- lowering a tool into the wellbore;
- activating a first mechanism to set the tool;
- and
- automatically releasing, after a predetermined time period, the tool with a second mechanism.
A method for use in a wellbore, comprising:
- applying a pressure against a piston;
- and
- after a predetermined delay, automatically releasing pressure from the piston.
A tool string for use in a wellbore, comprising:
- a non-rigid carrier;
- a tool;
- and
- an anchor device coupled to the tool, the anchor device comprising:
- an actuator assembly responsive to an actuating signal provided over the non-rigid carrier;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device,
- wherein the anchor device is adapted to centralize the tool in the wellbore,
- wherein the tool comprises a perforating apparatus having big hole shaped charges.
A tool string for use in a wellbore, comprising:
- a non-rigid carrier;
- a tool;
- and
- an anchor device coupled to the tool, the anchor device comprising:
- an actuator assembly responsive to an actuating signal provided over the non-rigid carrier;
- an operator coupled to the actuator assembly;
- and
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device,
- wherein the anchor device is adapted to place the tool in an eccentric position.
A tool string for use in a wellbore, comprising:
- a tool;
- an anchor device coupled to the tool, the anchor device comprising:
- an actuator assembly responsive to an actuating signal;
- an operator coupled to the actuator assembly;
- an engagement member moveable to a set position by the operator when actuated by the actuator assembly to set the anchor device;
- and
- a jarring device.
Dependencies are inferred from the claim text.