摘要:
This invention refers to a pumping unit for drilling oil in the field of oil prospecting equipment, comprising an oil well stem (120) which alters the length of said stem (120). The halter adjustment mechanism applied to a pumping unit for oil drilling comprises a fixed body (10) fitted with a peripheral support for fixing the steel cables (11) attached to the head (110) of the pumping unit (100). On the periphery of the fixed body (10) guides (12) are placed, wherein the peripheral support is displaced, a position sensor (121) being provided on the top end of such guide (12). The movement control mechanism of a mobile body within a rigid head of a pumping unit, which is the object of this invention, comprises equipment composed of a fixed portion (31) and a mobile portion (36). The fixed portion (31) comprises a reducer set (32), with a differential gear box (33) and the engine thereof (10) and a control system (38). The mobile portion (36) comprises a rotating head (35) over which a mobile body is attached (39), with a worm gear (37), a master gear (34), transfer gears (11), (12) and (13) and a movement system (14).
摘要:
A long-stroke pumping unit includes a tower; a counterweight assembly movable along the tower; a crown mounted atop the tower; a sprocket supported by the crown and rotatable relative thereto; and a belt. The unit further includes a motor having a stator mounted to the crown and a rotor torsionally connected to the sprocket; and a sensor for detecting position of the counterweight assembly. The pumping unit may include a dynamic control system for controlling a speed of a motor.
摘要:
A pump jack controller is provided that can harness the waste energy generated during the operation of a pump jack when its electrical motor is in an over-speed condition, and convert that waste energy into electrical energy that can be supplied back onto an electrical power grid thus converting the pump jack into a micro electric power generator.
摘要:
A system for enhancing a flow of a fluid induced by a rod pumping unit is provided. A pumping control unit is configured to control stroke movement of the rod pumping unit. The pumping control unit is configured to store a first set of stroke timing data based on a first pressure level and a second set of stroke timing data based on a second pressure level, store a set of pressure weights, and receive a current pressure level. The current pressure level is between the first pressure level and the second pressure level. The pumping control unit is also configured to determine a current set of stroke timing data based on the current pressure level, the first set of stroke timing, the second set of stroke timing, and the set of pressure weights, and initiate at least one stroke of the rod pumping unit.
摘要:
There is provided a method and system to determine the position of a sucker rod pumping system without a position sensing device during production pumping. A pump control system of the sucker rod pumping system includes a controller coupled to a database, with the controller configured to access an rxless torque value in the database. With the stored rxless torque value representative of toggle points of the crank arm during an initial calibration pumping cycle, the controller further is configured to continuously sample the rxless torque value of the system and determine the crank arm position in relation to the sample rxless torque value. The controller adjusts the pumping system for optimal operations, without a crank arm position sensor during production pumping by identifying a toggle point and setting the crank arm position estimate equal to the value corresponding to the crank position at the identified toggle point.
摘要:
Techniques and apparatus are provided for production enhancement with downhole monitoring for an artificial lift system, such as a reciprocating rod lift system. In aspects, a method for controlling a rod pump used to produce fluids from a wellbore is provided. The method generally includes monitoring one or more downhole parameters in the wellbore and adjusting one or more pump parameters used to control the rod pump based, at least in part, on the monitored downhole parameters.
摘要:
An electric power saving device for motor of pump jack apparatus. The electric power saving device preferably detects current and voltage generated from a motor of the pump jack during the up stroke and down stroke and preferably converts the real-time load torque obtained using an AC amplifier and voltage converter. The electric power saving device preferably minimizes the counter electromotive force (Back-EMF) and preferably reduces consumption of electrical energy by automatically reducing speed in a heavy-load during an up stroke, while automatically increasing speed in un-load, during a down stroke. This is preferably done by converting real-time load torque obtained by torque formula and through the output value according to load torque in order to minimize Back-EMF.
摘要:
Methods and apparatus to determine production of a downhole pump are described herein. An example method includes measuring a first amount of liquid produced from a well by a pump during a first stroke of the pump, computing a first pump card based on the first stroke, determining a first area of the first pump card and determining a leakage proportionality constant of the pump based on the first amount of liquid produced and the first area. The example method also includes computing a second pump card based on a second stroke of the pump, determining a second area of the second pump card and determining a second amount of liquid produced by the pump during the second stroke based on the leakage proportionality constant and the second area.
摘要:
A system for determining rod position in a rod pumped well is described that includes a laser unit mounted on an underside of the walking beam and a reflector plate mounted on the sampson post of the rod pumped well in a position near the laser unit. The laser transmits a beam onto the reflector plate allowing the laser unit to determine the distance between the laser and the reflector plate. The distance between the laser and reflector plate as determined by the laser is transmitted to a controller which calculates the position of the rod in the rod pumped well based on the distance determined by the laser.
摘要:
Methods for measuring the leakage rate of a downhole pump using either measured axial load information from the drive rod string or using measured production data. The invention is for methods of applying the leakage rate to a downhole dynamometer card, for a reciprocating rod pump, for determining well production.