Heavy Oil Lifting Device and Heavy Oil Lifting Method

{
  "publication_number": "US2022412196A1",
  "country": "US",
  "kind": "A1",
  "title": "Heavy Oil Lifting Device and Heavy Oil Lifting Method",
  "abstract": "A heavy oil lifting device and a heavy oil lifting method are provided. The device includes: a plurality of liquid injection pumps each including a liquid inlet and a liquid outlet and configured to intake in liquid and discharge the liquid after pressurization; a control valve including a first end and a second end, the liquid outlets of the plurality of liquid injection pumps are connected with the first end; a power liquid transmission pipe connected with the second end and configured to transmit the liquid after pressurization; an operation pump connected with the power liquid transmission pipe, and the liquid after pressurization is used as power liquid to drive the operation pump to reciprocate; the control valve is in switchable communication with the liquid injection pump so that the power liquid transmission pipe is in switchable communication with the liquid injection pump.",
  "claims": [
    "1. A heavy oil lifting device, comprising: a plurality of liquid injection pumps, each of the plurality of liquid injection pumps comprising a liquid inlet and a liquid outlet, and each of the plurality of liquid injection pumps being configured to intake a liquid and discharge the liquid after pressurization; a control valve, comprising a first end and a second end, the liquid outlets of the plurality of liquid injection pumps being connected with the first end of the control valve; a power liquid transmission pipe, connected with the second end of the control valve and configured to transmit the liquid after pressurization; and an operation pump, connected with the power liquid transmission pipe, and the liquid after pressurization being used as a power liquid to drive the operation pump to reciprocate, wherein the control valve is configured to be switchably communicated with one of the plurality of liquid injection pumps so that the power liquid transmission pipe is switchably communicated with one of the plurality of liquid injection pumps. 2. The heavy oil lifting device according to claim 1, wherein the plurality of liquid injection pumps comprise at least two liquid injection pumps with different powers. 3. The heavy oil lifting device according to claim 1, further comprising a tubing, wherein the power liquid transmission pipe is disposed in the tubing, and the operation pump is disposed in the tubing. 4. The heavy oil lifting device according to claim 3, wherein: the power liquid drives the operation pump to reciprocate and then forms a spent liquid, and the spent liquid is mixed with well liquid to form an oil-containing mixed liquid; and the operation pump is configured to lift the oil-containing mixed liquid to ground through the tubing. 5. The heavy oil lifting device according to claim 4, further comprising a first transmission pipeline, wherein: the first transmission pipeline is connected with the liquid inlets of the plurality of liquid injection pumps; and the first transmission pipeline is configured to transmit the liquid. 6. The heavy oil lifting device according to claim 5, further comprising a filter, wherein the filter is arranged in the first transmission pipeline and configured to filter the liquid passing therethrough. 7. The heavy oil lifting device according to claim 5, further comprising a second transmission pipeline, wherein the liquid outlets of the plurality of liquid injection pumps are connected with the power liquid transmission pipe through the second transmission pipeline. 8. The heavy oil lifting device according to claim 7, further comprising a flowmeter, wherein the flowmeter is arranged in the second transmission pipeline. 9. The heavy oil lifting device according to claim 8, further comprising a third transmission pipeline, wherein the third transmission pipeline connects the tubing to transmit the oil-containing mixed liquid. 10. The heavy oil lifting device according to claim 9, further comprising a separator, wherein: the separator is connected with the third transmission pipeline, the separator is configured to perform oil-water separation on the oil-containing mixed liquid; the separator comprises an oil outlet and a water outlet; and the water outlet is connected with the first transmission pipeline to form a circulation loop of the power liquid. 11. The heavy oil lifting device according to claim 1, further comprising a heating member, wherein the heating member is configured to heat the liquid to form thermal power liquid. 12. The heavy oil lifting device according to claim 3, further comprising a casing, wherein the tubing is located in the casing. 13. The heavy oil lifting device according to claim 1, further comprising a control member, wherein the control member is connected with the control valve so as to be configured to control the control valve to communicate with one of the plurality of liquid injection pumps. 14. The heavy oil lifting device according to claim 1, wherein: the operation pump comprises a housing, a piston structure and a partition member; the partition member divides the housing into a first chamber and a second chamber; the piston structure comprises a piston rod, a first piston and a second piston; the first piston and the second piston are respectively arranged at two ends of the piston rod; the first piston is located in the first chamber and divides the first chamber into a first power liquid chamber and a first oil chamber; and the second piston is located in the second chamber and divides the second chamber into a second power liquid chamber and a second oil chamber; the piston rod passes through the partition member; and the piston structure can rotate around an axis of the piston rod. 15. A heavy oil lifting method, comprising: intaking in a liquid by a liquid injection pump, and pressurizing and discharging the liquid; taking the liquid after pressurization as a power liquid; passing through a power liquid transmission pipe to drive an operation pump to perform a reciprocating motion; mixing spent liquid generated from the power liquid with well liquid in a pump chamber of the operation pump to form an oil-containing mixed liquid; and switchably lifting the oil-containing mixed liquid to ground through the reciprocating motion of the operation pump, wherein a plurality of liquid injection pumps is disposed, each comprising a liquid inlet and a liquid outlet, the liquid outlets of the plurality of liquid injection pumps are connected with a control valve, and wherein the method further comprises: adjusting the control valve to be in a switchable communication with one of the plurality of liquid injection pumps so that the power liquid transmission pipe is in switchable communication with one of the plurality of liquid injection pumps. 16. The heavy oil lifting method according to claim 15, wherein the plurality of liquid injection pumps comprise at least two liquid injection pumps with different powers, and the method further comprises: selecting a liquid injection pump with a suitable power for operation according to an operation parameter. 17. The heavy oil lifting method according to claim 15, further comprising: performing oil-water separation on the oil-containing mixed liquid lifted to the ground, wherein separated water is intaken into the liquid injection pump to be used as the liquid, so as to form a circulation loop of the power liquid. 18. The heavy oil lifting method according to claim 15, further comprising heating the power liquid to form a thermal power liquid. 19. The heavy oil lifting device according to claim 4, further comprising a first transmission pipeline, wherein the first transmission pipeline is connected with the liquid inlets of the plurality of liquid injection pumps, and the first transmission pipeline is configured to transmit the liquid. 20. The heavy oil lifting device according to claim 19, further comprising a second transmission pipeline, wherein the liquid outlets of the plurality of liquid injection pumps are connected with the power liquid transmission pipe through the second transmission pipeline."
  ],
  "description_excerpt": "At least one embodiment of the present disclosure relates to a heavy oil lifting device and a heavy oil lifting method.\n\nIn the process of heavy oil lifting from an oil well, with the continuous decrease of oil temperature and air temperature, the viscosity of heavy oil would rise sharply and the heavy oil would gradually harden, just like asphalt on highway.\n\nUsually, viscosity reduction measures should be taken in the process of heavy oil lifting to facilitate the smooth recovery of heavy oil. Heavy oil recovery needs two systems, one of which includes a mechanical system for lifting crude oil, and the other of which includes a viscosity reducing system for reducing the viscosity of the crude oil during lifting. The mechanical system is classified into two types: a rod pump system and a rod-less pump system. Usually, the rod pump system includes a beam pumping unit or a screw pump; whereas the rod-less pump system includes a hydraulic pump or an electric submersible centrifugal pump. The main ways of heavy oil lifting and oil viscosity reduction include thermal viscosity reduction and chemical viscosity reduction. The Liaohe Oilfield, for example, uses the electric heating rod for thermal viscosity reduction, which cooperates with the beam pumping unit to lift the heavy oil, while the Xinjiang Oilfield, for another example, uses the method of mixing with thin oil to reduce viscosity, which cooperates with the screw pump to lift the heavy oil. Both operation schemes are costly. Therefore, a heavy oil lifting technology that can reduce both the costs and the construction operations is required.",
  "cpc": [
    "E21B 43/129",
    "E21B 36/006",
    "E21B 43/24",
    "E21B 43/40"
  ],
  "ipc": [
    "E21B 36/00",
    "E21B 43/12",
    "E21B 43/40"
  ],
  "assignees": [
    "Yantai Jereh Petroleum Equipment and Technologies Co Ltd"
  ],
  "inventors": [
    "Qili Cui",
    "Xueyang ZHAO",
    "Lin Jiang",
    "Bo Ding",
    "Qingren LIN"
  ],
  "filing_date": "2022-06-30",
  "publication_date": "2022-12-29",
  "priority_date": "2021-06-28",
  "application_number": "US-202217854714-A",
  "family_id": "77140909",
  "cited_by_count": 75,
  "citations": [
    "CA2255603C",
    "US20200088009A1"
  ]
}