Rubber compound reinforced with low-modulus fibers
AssigneeAbaco Drilling Technologies LLC
InventorsPeter Thomas Cariveau, Robert Bohmer
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Abstract
A rubber compound for use in a stator. The rubber compound includes fibers. At least some of the fibers have a Modulus of at least 0.5 GPa. Fibers in the fiber reinforcement create a grain direction. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In embodiments, the fiber reinforcement may include a fiber loading of greater than 0.5 phr of fibers. In embodiments, the rubber compound may have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain.
Claims20
A rubber compound for use in a stator, the rubber compound comprising:
- a fiber reinforcement, the fiber reinforcement including a plurality of fibers, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”, wherein the rubber compound has a first value for 25% tensile Modulus “across the grain” and a second value for 25% tensile Modulus “with the grain”, wherein the first value is at least 10% lower than the second value;
- wherein the fiber reinforcement includes a fiber loading of greater than 0.5 phr of fibers;
- wherein the rubber compound has a 25% tensile Modulus of greater than 400 psi “across the grain” and a 50% tensile Modulus of greater than 700 psi “across the grain”;
- and
- wherein at least some of the fibers have a Modulus of at least 0.5 GPa.
A rubber compound for use in a stator, the rubber compound comprising:
- a fiber reinforcement, the fiber reinforcement including a plurality of fibers, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”, wherein the rubber compound has a first value for 25% tensile Modulus “across the grain” and a second value for 25% tensile Modulus “with the grain”, wherein the first value is at least 10% lower than the second value;
- wherein the fiber reinforcement includes a fiber loading of greater than 1.0 phr of fibers;
- wherein the rubber compound has a 25% tensile Modulus of greater than 400 psi “across the grain” and a 50% tensile Modulus of greater than 700 psi “across the grain”;
- and
- wherein at least some of the fibers have a Modulus of at least 0.5 GPa.
A rubber compound for use in a stator, the rubber compound comprising:
- a fiber reinforcement, the fiber reinforcement including a plurality of fibers, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”, wherein the rubber compound has a first value for 25% tensile Modulus “across the grain” and a second value for 25% tensile Modulus “with the grain”, wherein the first value is at least 10% lower than the second value;
- wherein the fiber reinforcement includes a fiber loading of greater than 1.5 phr of fibers;
- wherein the rubber compound has a 25% tensile Modulus of greater than 400 psi “across the grain” and a 50% tensile Modulus of greater than 700 psi “across the grain”;
- and
- wherein at least some of the fibers have a Modulus of at least 0.5 GPa.
Dependencies are inferred from the claim text.