Sucker rod actuating device
First Claim
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1. A device for directly actuating a rod of a sucker rod pump assembly, the device comprising:
- an electric linear motor, the motor including an armature, stators and a base and positioned about the axis of operation of the sucker rod pump, wherein the motor armature is connected to the top end of the rod; and
a counterbalance in contact with the top end of the armature.
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Abstract
The present invention provides a device for actuating a sucker rod pump assembly, the device comprising an electric linear motor positioned about the axis of operation of the sucker rod pump and a counterbalance positioned such that it counterbalances the weight of the sucker rod assembly and the liquid being pumped. The present invention also provides a method for pumping a fluid utilizing a sucker rod assembly, an electric linear motor and a counterbalance.
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Citations
16 Claims
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1. A device for directly actuating a rod of a sucker rod pump assembly, the device comprising:
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an electric linear motor, the motor including an armature, stators and a base and positioned about the axis of operation of the sucker rod pump, wherein the motor armature is connected to the top end of the rod; and
a counterbalance in contact with the top end of the armature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for pumping fluid from a well, the device comprising:
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a sucker rod pump assembly, the assembly including a rod;
an electric linear motor, the motor including an armature, stators and a base, and positioned such that it operates on substantially the same axis as the rod traverses, wherein the armature is connected to the top end of the rod; and
a counterbalance positioned such that it counterbalances the weight of the sucker rod assembly and the liquid being pumped. - View Dependent Claims (11, 12, 13)
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14. A method for pumping a fluid utilizing a sucker rod assembly, an electric linear motor and a counterbalance, the sucker rod assembly including a rod and the electric linear motor including an armature, stators and a base, the method comprising:
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positioning the sucker rod pump assembly such that the pump contacts a fluid reservoir;
positioning the linear motor such that its axis of operation is substantially the same as the axis of movement of the sucker rod;
attaching the top end of the sucker rod to the armature of the linear motor such that when operable the armature directly drives the rod;
providing a counterbalance positioned such that it alleviates the load imposed on the linear motor by the sucker rod and the column of fluid to be pumped; and
operating the motor such that the pump acquires fluid on its down stroke and transports fluid on its up stroke. - View Dependent Claims (15, 16)
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Specification