Downhole tool and method of use
DCFirst Claim
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1. A downhole tool useable for isolating sections of a wellbore, the downhole tool comprising:
- a mandrel further comprising;
a body comprising an external surface and an inner bore formed therein;
a distal end; and
a proximate end;
wherein the mandrel comprises composite material, wherein a set of rounded threads are disposed along the external surface at the distal end, wherein a set of shear threads are disposed along a surface of the inner bore at the proximate end,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.
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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.
69 Citations
47 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 mandrel further comprising; a body comprising an external surface and an inner bore formed therein; a distal end; and a proximate end; wherein the mandrel comprises composite material, wherein a set of rounded threads are disposed along the external surface at the distal end, wherein a set of shear threads are disposed along a surface of the inner bore at the proximate end, 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A downhole tool for isolating zones in a well comprising:
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a mandrel comprising composite material, and the mandrel further comprising; a body comprising an external surface and an inner bore formed therein; a first set of shear threads for mating with a setting tool, the first set disposed on an inner bore surface; and a second set of threads for coupling to a lower sleeve, the second set disposed on the external surface; 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 comprising shear threads and a first outer diameter, a distal end comprising rounded threads and a second outer diameter, and an inner bore disposed between the proximate end and the distal end; and a transition region formed on the body between the proximate end and the distal end, wherein the mandrel is made from composite filament wound material, wherein the mandrel comprises an outer surface along the body, and an inner surface along the bore, wherein the shear threads are formed on the inner surface of the inner bore. - View Dependent Claims (23, 24)
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25. A composite mandrel for a downhole tool comprising:
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a proximate end having a first outer diameter; a distal end comprising a first set of threads and a second outer diameter; a flowbore extending from the proximate end to the distal end; and an inner set of shear threads disposed in the flowbore, wherein the mandrel is made from composite filament wound material, wherein the shear threads are configured to shear when exposed to a predetermined axial force.
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26. A downhole tool useable for isolating sections of a wellbore, the downhole tool comprising:
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a 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 the mandrel is made from filament wound material, and 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 (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. 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 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 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 (40, 41, 42, 43, 44, 45, 46, 47)
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Specification