Combined oil pumping system composed of rod oil pump and ground driving screw pump
A technology for driving screw and screw pump, which is applied in the field of mechanical oil extraction to achieve the effect of reducing weight, reducing suspended point load and improving load state
Pending Publication Date: 2018-06-29
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
It can use the upper screw pump to improve the load of the lower rod pump in the deep pumping process, etc.
Method used
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[0019] The specific embodiment of the present invention will be described with reference to the accompanying drawings.
[0020] like figure 1 As shown, a combined oil pumping system with a rod pump and a ground-driven screw pump mainly includes upper and lower parts, the upper part is a ground-driven screw pump, and the lower part is an oil well pump 12;
[0021] The ground-driven screw pump includes a drive screw 3, an upper steering mechanism 5, a screw pump rotor 6, a screw pump stator 7, and a lower steering mechanism 8;
[0022] The upper and lower ends of the driving screw 3 are fixedly connected to the sucker rod 1 through the upper joint 2 and the lower joint 11 respectively, and the lower end of the lower sucker rod 1 is connected to the oil well pump 12; the surface of the driving screw 3 is provided with threads;
[0023] The center of the screw pump rotor 6 is provided with a vertical cavity, and the drive screw 3 passes through the cavity; the center of the upper...
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The invention relates to the technical field of mechanical oil production, in particular to a combined oil pumping system composed of a rod oil pump and a ground driving screw pump. The combined oil pumping system mainly comprises the screw pump and the oil pump; a screw pump rotor is internally provided with a center cavity, and the upper end and the lower end of the screw pump rotor are providedwith rotatable steering mechanisms; a driving screw connected with an oil pumping rod penetrates through the center cavity of the screw pump rotor; and the inner walls of the steering mechanisms arematched with the driving screw, the driving screw drives the steering mechanisms to rotationally move, the steering mechanisms and the screw pump rotor are engaged at the lower stroke through unidirectional ratchets without being engaged at the upper stroke, accordingly, the screw pump rotor does unidirectional rotation movement at the lower stroke in the upper and lower stroke processes, the steering mechanisms are pressed into the rotor through pressing caps, and the lower end of the driving screw is connected with the oil pumping rod of which the lower portion is connected with the oil pumpthrough a lower connector. Through the combined oil pumping system, the load-up condition of the oil pump in a deep well can be improved, the lifting depth and displacement of a mechanical oil production well can be increased, and the large displacement production requirements of the deep well in the later period are met.
Description
technical field [0001] The invention belongs to the technical field of mechanical oil extraction, and in particular relates to a combined oil pumping system of a rod pump and a surface-driven screw pump, which is suitable for oil wells requiring deep well pumping and large displacement. Background technique [0002] In the process of oil extraction, with the development of deep oil and gas fields such as Tarim, the process technology that can meet the needs of deep wells with large displacement and deep pumping has gradually become a reality. Deep wells with large displacement and deep pumping are currently production technology problems that many oil fields at home and abroad urgently need to tackle. Considering that the oil and gas reservoirs newly developed in the oilfield are deeply buried, and the energy of the oil layers in the old oilfields is gradually reduced, the pumping depth of the mechanical production well is continuously deepened. Limitations and inefficiencie...
Claims
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Login to View More IPC IPC(8): F04B23/10F04B47/02F04C2/107
CPCF04B23/10F04B47/02F04C2/107
Inventor 杨志张兴华康露王鑫王振华徐健玮柘尔华
Owner SOUTHWEST PETROLEUM UNIV