Long stroke pumping unit
First Claim
1. A long stroke pumping unit, comprising:
- a tower;
a counterweight assembly movable along the tower;
a crown mounted atop the tower;
a drum supported by the crown and rotatable relative thereto;
a belt having a first end connected to the counterweight assembly, extending over the drum, and having a second end connectable to a rod string;
a linear electromagnetic motor for reciprocating the counterweight assembly along the tower and comprising;
a traveler mounted to an exterior of and extending along and attached to a side of the counterweight assembly; and
a stator extending from a base of the tower to the crown and along a guide rail of the tower; and
a sensor for detecting position of the counterweight assembly.
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Accused Products
Abstract
A long stroke pumping unit includes a tower, a counterweight assembly movable along the tower, a crown mounted atop the tower, and a drum supported by the crown and rotatable relative thereto. A belt has a first end connected to the counterweight assembly and a second end connectable to a rod string, and the belt extends over the drum. A linear electromagnetic motor is used to reciprocate the counterweight assembly along the tower. The linear electromagnetic motor includes a traveler mounted to an exterior of the counterweight assembly and a stator extending from a base of the tower to the crown and along a guide rail of the tower. The pumping unit further includes a sensor for detecting position of the counterweight assembly.
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Citations
24 Claims
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1. A long stroke pumping unit, comprising:
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a tower; a counterweight assembly movable along the tower; a crown mounted atop the tower; a drum supported by the crown and rotatable relative thereto; a belt having a first end connected to the counterweight assembly, extending over the drum, and having a second end connectable to a rod string; a linear electromagnetic motor for reciprocating the counterweight assembly along the tower and comprising; a traveler mounted to an exterior of and extending along and attached to a side of the counterweight assembly; and a stator extending from a base of the tower to the crown and along a guide rail of the tower; and a sensor for detecting position of the counterweight assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A long stroke pumping unit, comprising:
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a tower; a counterweight assembly movable along the tower; a crown mounted atop the tower; a drum supported by the crown and rotatable relative thereto; a belt having a first end connected to the counterweight assembly, extending over the drum, and having a second end connectable to a rod string; a linear electromagnetic motor for reciprocating the counterweight assembly along the tower and comprising; a traveler attached to an interior of the counterweight assembly; and a stator extending from a base of the tower to the crown and extending through the interior of the counterweight assembly; and a sensor for detecting position of the counterweight assembly. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification