Class / Patent application number | Description | Number of patent applications / Date published |
074040000 | Crank, pitman, lever, and slide | 6 |
074041000 | Pump jack type | 6 |
20090107267 | PRIME MOVER WITH INTEGRAL OIL RESERVOIR - A prime mover is shown which can be used in supplying power for a variety of roles in industrial applications, including oil and gas well operations, such as the prime mover which is used to operate a pump jack at a well site. It includes an internal combustion engine having an output shaft, the engine being cooled by engine oil supplied from an oil reservoir to the engine and circulated by an oil pump. A housing framework encloses the engine and supports an associated jack shaft bearing assembly, and includes a base, a hood and a plurality of upright supports which extend upwardly from the base in the direction of the hood. One or more of the uprights is a specially designed compartment having a plurality of opposing sides which define an initially open interior space, the interior space comprising an integral oil reservoir for storing and supplying oil to the engine during normal engine operation. | 04-30-2009 |
20090266186 | Ring Rack Oil Pumping Machine - The Ring Rack Oil Pumping Machine is comprised of: a base, a frame mounted on the base, a roller mounted at the frame top, a sprocket case connects to the middle of the frame; a input shaft having a lower sprocket and a drive shaft having an upper sprocket are installed at the bottom and top of the sprocket case respectively, the upper sprocket and lower sprocket are connected by a chain; a guide wheel, track gear and centralizer wheel are mounted in sequence on the end of the drive shaft extended out of the sprocket case; the track gear meshes with a rack, a slide rail is mounted with the frame, and a sliding base ( | 10-29-2009 |
20100037716 | Clampless adjustable polish rod and well drilling equipment comprising same - A polish rod apparatus connectable between a motion imparting mechanism of a pump jack and a string of sucker rods comprises a polish rod and a lift device. The polish rod has a center portion extending between its first end portion and second end portion. The center portion includes a thread structure extending along a portion of its length. The first end portion is connectable to the string of sucker rods. The lift device has an adjuster body including a central passage extending therethrough. The central passage of the adjuster body includes a thread structure matingly engagable with the thread structure of the polish rod such that rotation of the adjuster body relative to the polish rod causes axial movement of the adjuster body along a longitudinal axis of the polish rod thereby enabling vertical adjustment of the sucker rod assembly with respect to the motion imparting mechanism. | 02-18-2010 |
20100170353 | PUMPING UNIT - A pumping unit that removes fluid from a well includes a base disposed on a foundation adjacent the well. A group of support posts is mounted on the base and extends upwardly to a center bearing, and is connected to the center bearing. A walking beam is pivotally mounted on the bearing. A Pitman arm is pivotally connected to the walking beam rearwardly of the center bearing, and extends downwardly to a crank assembly. The crank assembly is mounted on the base centrally beneath the Pitman arm, and is pivotally connected to the Pitman arm. A gear reducer is mounted on the side of the crank assembly, and a drive unit is mounted on the base and is connected to the gear reducer. Actuation of the drive unit actuates movement of the gear reducer, crank assembly, Pitman arm, and the walking beam to pump the fluid from the well. | 07-08-2010 |
20120031208 | BEAM PUMPING UNIT FOR INCLINED WELLHEAD - A method and pumping unit for use with an inclined wellhead. Proper address of the wellhead is accomplished through incorporation of an elbow-shaped walking beam. The forward section of the walking beam is fabricated such that its longitudinal axis is angled to address the inclination of the wellhead. The rearward section of the walking beam and the four-bar linkage system remains unchanged relative to a prior art pump jack intended for vertical wells. This modification is a simple and effective means of addressing an angled wellhead while preserving the well-known operating characteristics of a prior art pumping unit. Torque factors, polished rod position, speed, acceleration, stroke length, and effective counterbalance remain unchanged. | 02-09-2012 |
20150292498 | OIL PUMPING APPARATUS INCLUDING A CYCLOIDAL SPEED-REDUCTION MECHANISM - A compact dual-output speed-reduction mechanism for oil well pumps includes a housing containing a chamber; a high-speed tubular input shaft having a first end portion journalled in a first housing opening, and an eccentric portion arranged in the housing chamber; a low-speed output shaft journalled within the input shaft, the output shaft having a first end portion extending outwardly of the housing beyond the input shaft first end portion, and a second end portion that extends beyond the input shaft second end portion and outwardly of the housing via a second housing opening opposite the first housing opening. A cycloidal speed-reduction mechanism arranged in the housing chamber is connected between the input shaft eccentric portion and the housing, and between the input shaft eccentric portion and a power transfer disk connected with the output shaft. At least one rotatably-driven device is connected with the two output shaft end portions. | 10-15-2015 |