DOWNHOLE TOOL AND METHOD OF USE
First Claim
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1. A downhole tool useable for isolating sections of a wellbore, the downhole tool comprising:
- a composite mandrel having at least one set of rounded threads;
a composite member disposed about the mandrel and in engagement with a seal element also disposed about the mandrel, wherein the composite member is made of a first material and comprises a first portion and a second portion; and
a slip disposed about the mandrel,wherein setting of the downhole tool in the wellbore includes at least a portion of the slip in gripping engagement with a surrounding tubular, and the seal element sealingly engaged with the surrounding tubular.
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Abstract
Embodiments of the disclosure pertain to a mandrel for a downhole tool that may include a body having a proximate end with a first outer diameter and a distal end with a second outer diameter; a first set of threads disposed on the distal end; and a transition region formed on the body between the proximate end and the distal end. In aspects, the mandrel may be made from filament wound composite material.
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Citations
55 Claims
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1. A downhole tool useable for isolating sections of a wellbore, the downhole tool comprising:
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a composite mandrel having at least one set of rounded threads; a composite member disposed about the mandrel and in engagement with a seal element also disposed about the mandrel, wherein the composite member is made of a first material and comprises a first portion and a second portion; and a slip disposed about the mandrel, wherein setting of the downhole tool in the wellbore includes at least a portion of the slip in gripping engagement with a surrounding tubular, and the seal element sealingly engaged with the surrounding tubular. - View Dependent Claims (2, 5, 6)
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- 3. The downhole tool of 1, wherein the composite mandrel comprises a distal end, a proximate end, and a bore formed therein, wherein the composite mandrel is configured with a second set of threads disposed along a surface of the bore at the proximate end, wherein the rounded threads are disposed along an external mandrel surface at the distal end, wherein the composite mandrel consists of filament wound material, and wherein the second set of threads comprise shear threads.
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7. A downhole tool for isolating zones in a well comprising:
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a composite mandrel having a first set of threads for mating with a setting tool and a second set of threads for coupling to a lower sleeve; a seal element disposed around the mandrel, the seal element configured to buckle and expand radially in response to application of force on the seal element; and a composite member disposed around the composite mandrel and proximate to the sealing element, the composite member comprising a deformable portion having one or more grooves disposed therein. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A mandrel for a downhole tool, the mandrel comprising:
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a body having a proximate end with a first outer diameter and a distal end with a second outer diameter; a set of rounded threads disposed on the distal end; a transition region formed on the body between the proximate end and the distal end. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A mandrel for a downhole tool, the mandrel comprising:
a body having a proximate end comprising shear threads and a first outer diameter, and a distal end comprising rounded threads and a second outer diameter, wherein the mandrel is made from composite filament wound material, and wherein the first outer diameter is larger than the second outer diameter. - View Dependent Claims (30, 31, 32, 33, 34, 35)
- 36. A composite mandrel comprising an inner shear thread profile, wherein the shear threads are configured to shear when exposed to a predetermined axial force, resulting in disconnect between a setting tool and downhole tool comprising, wherein the shear threads are configured to shear at a predetermined axial force greater than the force required to set the downhole tool, but less than the force required to part the body.
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38. A downhole tool useable for isolating sections of a wellbore, the downhole tool comprising:
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a composite mandrel comprising; a body having a proximate end and a distal end; a set of rounded threads disposed on the distal end; and a transition region formed on the body between the proximate end and the distal end, and having an angled transition surface; a composite member disposed about the mandrel and in engagement with a seal element also disposed about the mandrel, wherein the composite member is made of a first material and comprises a first portion and a second portion; and a bearing plate disposed around the mandrel and engaged with the angled transition surface, wherein setting of the downhole tool comprises the composite member and the seal element at least partially engaged with a surrounding tubular. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of setting a downhole tool in order to isolate one or more sections of a wellbore, the method comprising:
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running the downhole tool into the wellbore to a desired position, the downhole tool comprising; a composite mandrel configured with a set of rounded threads and a set of shear threads; a composite member disposed about the mandrel and in engagement with a seal element also disposed about the mandrel, wherein the composite member is made of a first material and comprises a deformable portion and a resilient portion; placing the composite mandrel under a tensile load that causes the seal element to buckle axially and expand outwardly, and also causes the seal element to compress against the composite member, wherein the deformable portion expands radially outward and the seal element engages a surrounding tubular; and disconnecting the downhole tool from a setting device coupled therewith when the tensile load is sufficient to shear the set of shear threads. - View Dependent Claims (50, 51, 52, 53, 54, 55)
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Specification