Borehole imaging and orientation of downhole tools
First Claim
1. A method of orienting a perforating gun in a borehole of a formation, comprising:
- running a tool string into the borehole to a predetermined depth, the tool string comprising a motor module, the perforating gun, at least one centralizer disposed above the perforating gun, and an imaging device, wherein the imaging device is selected from a group consisting of a focused acoustic instrument, a focused thermal instrument and a focused flow measuring instrument;
imaging the borehole and the formation at the predetermined depth with the imaging device while rotating the imaging device about an axis of the tool string with the motor module to provide a radial survey of the borehole and the formation at the predetermined depth;
rotating the perforating gun about the axis of the tool string to a desired orientation with the motor module based on the radial survey; and
actuating the perforating gun at the desired orientation;
wherein the at least one centralizer comprises a non-rotating centralizer disposed above the imaging device and a rotating centralizer disposed below the imaging device.
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Accused Products
Abstract
Methods of generating radial survey images of a borehole and methods of orienting downhole operational tools are disclosed. The disclosed techniques are used to generate a radial survey of the borehole in the form of one or more rose-plots and/or a radial image of the borehole and surrounding area that can be used to properly orient downhole operational tools in the desired direction. The tool string includes, from the top to bottom, a telemetry module, a non-rotating centralizer, a motor module, an imaging sonde used to survey the borehole, a rotating centralizer and a downhole operational tool. The motor module can be used to rotate the imaging sonde to generate the radial survey and then rotate the downhole operational tool to the desired direction based upon a review of the radial survey.
38 Citations
18 Claims
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1. A method of orienting a perforating gun in a borehole of a formation, comprising:
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running a tool string into the borehole to a predetermined depth, the tool string comprising a motor module, the perforating gun, at least one centralizer disposed above the perforating gun, and an imaging device, wherein the imaging device is selected from a group consisting of a focused acoustic instrument, a focused thermal instrument and a focused flow measuring instrument; imaging the borehole and the formation at the predetermined depth with the imaging device while rotating the imaging device about an axis of the tool string with the motor module to provide a radial survey of the borehole and the formation at the predetermined depth; rotating the perforating gun about the axis of the tool string to a desired orientation with the motor module based on the radial survey; and actuating the perforating gun at the desired orientation; wherein the at least one centralizer comprises a non-rotating centralizer disposed above the imaging device and a rotating centralizer disposed below the imaging device. - View Dependent Claims (2, 3, 4, 9, 10, 11, 13, 14, 15, 16, 17, 18)
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5. An oriented tool string for use in a borehole, the tool string comprising:
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a motor module; a perforating gun; at least two centralizers; an imaging device disposed between the at least two centralizers selected from a group consisting a focused acoustic device, a focused thermal device and a focused flow measuring device; the motor module capable of rotating the imaging device about an axis of the tool string to provide a radial survey of the borehole at a predetermined depth using data obtained from the imaging device; and the motor module rotating the perforating gun about the axis of the tool string to a desired orientation based on the radial survey. - View Dependent Claims (6, 7, 8)
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12. A method of orienting a downhole operational device in a borehole of a formation, comprising:
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running a tool string into the borehole to a predetermined depth, the tool string comprising a motor module, the downhole operational device, a lower centralizer disposed above the downhole operational device, an upper centralizer, and an imaging device disposed between the lower centralizer and the upper centralizer, wherein the imaging device is selected from a group consisting of a focused acoustic instrument, a focused thermal instrument and a focused flow measuring instrument; imaging the borehole and the formation at the predetermined depth with the imaging device while rotating the imaging device about an axis of the tool string with the motor module to provide a radial survey of the borehole and the formation at the predetermined depth; rotating the downhole operational device about the axis of the tool string to a desired orientation with the motor module based on the radial survey; and actuating the downhole operational device at the desired orientation.
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Specification