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Energy-saving hydraulic oil pumping device and hydraulic oil pumping method

A kind of oil pumping and hydraulic technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc. It can solve the problems of reducing oil pumping efficiency, increasing the overall weight and height of equipment, and being unable to flexibly adjust the downward speed of reciprocating motion. Achieve the effect of flexible adjustment and saving hydraulic drive energy output

Active Publication Date: 2018-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the reduction of the height will often affect the effective performance of the overall stroke of the oil pumping device.
In order to solve such problems, the patent ZL201120342359.9 proposes a hydraulic pumping unit driven by a hydraulic motor using secondary adjustment technology, and the piston rod of this pumping equipment is longer, which will increase the overall weight and height of the equipment; The patent CN202866762U proposes a hydraulic winch driving cable, belt or chain oil pumping device, but because the oil pumping device adopts a flexible transmission device, it is often impossible to flexibly adjust the downward speed of the reciprocating motion, which will undoubtedly affect the reciprocating motion of the sucker rod frequency thereby reducing oil pumping efficiency

Method used

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  • Energy-saving hydraulic oil pumping device and hydraulic oil pumping method

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Experimental program
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Effect test

Embodiment 1

[0034] like figure 1 As shown, the large-stroke energy-saving hydraulic pumping device consists of a motor 1, an oil pump 2, a lifting cylinder 3, a lifting device 6, a connecting beam 8, a sucker rod fixing sleeve 9, a smooth guide rail 10, a counterweight loading and unloading device 5 and The control system 11 consists of two sets of lifting cylinders 3 and the lifting device 6 used in combination, the two sets of lifting cylinders 3 are located on both sides of the sucker rod 12 and the lifting cylinders 3 are located at the bottom of the lifting device 6, and the counterweight loading and unloading device 5 is located at the top of the lifting device 6 and distributed on both sides of the connecting beam 8. When the lifting device 6 moves to the bottom of the oil well 13, the counterweight loading and unloading device 5 completes the unloading action. When the lifting device 6 moves to the top of the oil well 13, the The heavy loading and unloading device 5 completes the ...

Embodiment 2

[0038] like figure 2 As shown, the large-stroke energy-saving hydraulic pumping device is composed of a motor 1, an oil pump 2, a lifting cylinder 3, a pressure drop cylinder 14, a lifting device, a connecting beam 8, a sucker rod fixing sleeve 9, a guide rail 10 and a control system 11. Two sets of lifting cylinders 3 and lifting device 6 are used in combination, two sets of lifting cylinders 3 are located on both sides of the sucker rod 12 and the lifting cylinders 3 are located at the bottom of the lifting device, and two sets of pressure drop cylinders 14 are located at the bottom of the lifting device 6 The top is distributed on both sides of the connecting beam 8. Two sets of lifting devices 6 are respectively connected to the two ends of the connecting beam 8. The connecting beam 8 ensures a stable stroke through the smooth guide rail 10. The sucker rod fixing sleeve 9 in the middle of the connecting beam 8 is connected to the The oil rods 12 are fixedly connected, and...

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Abstract

The invention discloses an energy-saving type hydraulic oil pumping device and a hydraulic oil pumping method.The energy-saving type hydraulic oil pumping device comprises electric motors, oil pumps, a lifting system, lifting oil cylinders and a connecting cross beam, wherein the electric motors are connected with the oil pumps, and the oil pumps are communicated with the lifting oil cylinders; the lifting system comprises two lifting devices which are basically symmetrically mounted at the two sides of an oil pumping rod at a minimum; the number of the oil pumps and the number of the lifting oil cylinders correspond to the number of the lifting devices, and each lifting oil cylinder is mounted on the corresponding lifting device and provides powder for ascending and descending of the corresponding lifting device; the two ends of the connecting cross beam are fixedly connected with the upper end of the lifting system, the middle of the connecting cross beam is fixedly connected with the oil pumping rod, ascending and descending of the lifting system drive the connecting cross beam to ascend and descend, and furthermore, the oil pumping rod is driven to ascend and descend.Through the lifting oil cylinders and pressure drop oil cylinders in cooperation with the large-stroke folding type or slide rail type lifting devices, large-stroke oil pumping action under the small oil cylinder volume can be achieved, and the oil pumping stroke can reach eight meters.

Description

technical field [0001] The invention belongs to the field of petroleum exploitation equipment, and in particular relates to an energy-saving hydraulic pump driven by a single hydraulic cylinder or multiple hydraulic cylinders, with a relatively large pumping stroke and flexible adjustment, which can automatically control the stroke of the sucker rod and automatically relieve pressure. oil device. Background technique [0002] The pumping unit is an indispensable core equipment in the field of oil exploitation. The common type of pumping unit with a beam is commonly known as a "kowtow machine". It uses pressure to make oil out of the well. When the pumping unit is upstroke, the oil pipe elastically shrinks upward to complete the movement, driving the sucker rod to move upward, and the whole device functions through the mechanical gear system. However, as the current requirements for the efficiency of oil production projects are getting higher and higher, many oil wells with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00
CPCE21B43/126
Inventor 朱波王永伟曹伟伟乔琨
Owner SHANDONG UNIV