Oil jacket separate production process pipe column

Abstract

The utility model relates to the field of layered oil production equipment, in particular to an oil sleeve separate production process pipe column which comprises an oil sleeve, one end of the oil sleeve is a liquid outlet end, the other end of the oil sleeve is a liquid production inlet, and liquid inlet holes are formed in the circumferential face of the oil sleeve. The two liquid flow channels are respectively a first liquid flow channel and a second liquid flow channel; liquid pumping devices used for pumping out liquid towards the liquid outlet end are fixedly arranged in the first liquid flow channel and the second liquid flow channel and comprise the upper liquid pumping device and the lower liquid pumping device, and driving devices for driving the upper liquid pumping device and the lower liquid pumping device to act are connected to the upper liquid pumping device and the lower liquid pumping device. The device is simple in structure and convenient to use, and oil reservoir exploitation of two different production layers is achieved through the first liquid flow channel and the second liquid flow channel which are independently arranged and the liquid pumping devices arranged in the first liquid flow channel and the second liquid flow channel.

Description

Technical Field

[0001] The utility model relates to the field of layered oil production equipment, in particular to an oil casing layered production process pipe string. Background Art

[0002] As oil development progresses, the challenges facing oilfield development are increasing. For example, how can one efficiently exploit multiple strata simultaneously using a single well? Existing technical solutions involve commingled production of multiple strata or using packers or other methods to isolate or shut off some producing strata, allowing the remaining strata to be exploited. These methods utilize the tubing solely as a lifting channel, with the tubing annulus used for testing the dynamic fluid level and adding chemicals to the wellbore. Because the different producing strata are not completely isolated, they can interact with each other. For example, a low-pressure producing stratum can be affected by the combined production of a high-pressure stratum, leading to production declines or even backflow. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an oil casing separate production process string capable of realizing the production of two different production layers.

[0004] The utility model discloses an oil-casing separation production process string, comprising an oil casing, one end of the oil casing being a liquid outlet end, the other end being a production liquid inlet, a liquid inlet hole being provided on the circumference of the oil casing, and two mutually independent liquid flow channels being provided in the oil casing, namely a first liquid flow channel and a second liquid flow channel;

[0005] There are two liquid outlets on the liquid outlet end of the oil jacket, namely the central liquid outlet and the annular liquid outlet;

[0006] A pumping device for pumping liquid toward the liquid outlet is fixedly provided in each of the first liquid flow channel and the second liquid flow channel, namely an upper pumping device and a lower pumping device, and each of the upper pumping device and the lower pumping device is connected to a driving device for driving the upper pumping device and the lower pumping device, and the driving device is fixedly provided in the oil jacket;

[0007] The liquid inlet is connected to the central liquid outlet through a first liquid flow channel, and the liquid collection inlet is connected to the annular liquid outlet through a second liquid flow channel.

[0008] Preferably, an upper pump barrel and a lower pump barrel are provided in the oil casing, the upper pump barrel is sealed and fixedly connected to the oil casing via an upper packer sleeved on the upper pump barrel, and the lower pump barrel is sealed and fixedly connected to the oil casing via a lower packer sleeved on the lower pump barrel;

[0009] The ends of the upper pump barrel and the lower pump barrel facing each other extend into the outer tube from both ends of the outer tube and are sealed and fixedly connected to the outer tube;

[0010] The liquid inlet hole is provided on the oil jacket between the upper packer and the lower packer;

[0011] The upper pumping device is arranged in the upper pump barrel, and the lower pumping device is arranged in the lower pump barrel;

[0012] The driving device is arranged in the outer tube, and an overflow channel is provided between the driving device and the outer tube;

[0013] The invention also includes a central tube, which is arranged in the upper pump barrel, one end of the central tube is sealed and fixedly connected to the upper pump barrel, the other end of the central tube extends into the outer barrel and is sealed and fixedly connected to the drive device, and a liquid passage is provided between the central tube and the upper pump barrel;

[0014] A communication hole is further provided on the circumferential surface of the upper pump barrel near the liquid outlet end, and the upper packer and the lower packer are located on the same side of the communication hole;

[0015] The liquid passage is connected to the flow passage through an upper liquid hole provided on the upper pump barrel, the flow passage is connected to the area where the lower pumping device is located through a lower liquid hole provided on the lower pump barrel, and the liquid passage is connected to the annular space area between the upper pump barrel and the oil jacket through a connecting hole to form a second liquid flow passage; the end of the annular space area between the upper pump barrel and the oil jacket away from the liquid inlet is the annular space liquid outlet;

[0016] The liquid inlet hole is connected to the area where the upper pump liquid device is located through an oil inlet nozzle arranged on the upper pump barrel and passing through the upper pump barrel and the central tube to form a first liquid flow channel. The end of the area where the upper pump liquid device is located away from the liquid inlet is the central liquid outlet.

[0017] Preferably, the upper pumping liquid device includes an upper fixed valve and an upper connecting rod, the upper fixed valve is fixedly arranged in the upper pump barrel, one end of the upper connecting rod is connected to the driving device through the center rod, and the other end of the upper connecting rod is connected to the upstream movable valve arranged between the upper fixed valve and the upper connecting rod, and the upper fixed valve is sealed and slidably connected to the upper pump barrel.

[0018] Preferably, the lower pump liquid device includes a lower fixed valve and a lower connecting rod, the lower fixed valve is fixedly arranged in the lower pump barrel, one end of the lower connecting rod is connected to the driving device, and the other end of the lower connecting rod is connected to the downstream movable valve arranged between the lower fixed valve and the lower connecting rod, and the lower fixed valve is sealed and slidably connected to the lower pump barrel.

[0019] Preferably, the driving device connected to the upper pumping device and the lower pumping device is the same driving device, which is a double-acting linear motor.

[0020] Preferably, the upper liquid through hole and the lower liquid through hole are both located in the outer cylinder.

[0021] Preferably, a plurality of liquid inlet holes are provided on the oil jacket between the upper packer and the lower packer, and the liquid inlet holes are connected to the oil inlet nozzle through the area surrounded by the upper packer, the lower packer, the oil jacket, the upper pump barrel, the outer tube and the lower pump barrel.

[0022] The utility model has a simple structure and is easy to use, and utilizes two independently arranged first and second liquid flow channels and pumping devices arranged in the first and second liquid flow channels to realize oil reservoir exploitation in two different production layers.

[0023] When the utility model is used in an oil well to exploit two production layers at the same time, the two production layers can be exploited completely independently, and the two production layers are completely independent and do not affect each other.

[0024] The utility model can adjust the output of production capacity by replacing the upper pumping device and the lower pumping device of different models.

[0025] The utility model provides two lifting channels, which has certain advantages when used in producing wells with large liquid volumes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the utility model.

[0027] Figure markings: 1-oil casing, 2-upper fixed valve, 3-upper pump barrel, 4-upper movable valve, 5-upper connecting rod, 6-center tube, 7-upper packer, 8-outer tube, 9-double-acting linear motor, 10-downstream movable valve, 11-lower fixed valve, 12-lower packer, 13-upper joint pipe, 14-lower joint pipe, 15-oil inlet nozzle, 16-lower connecting rod, 17-lower pump barrel. DETAILED DESCRIPTION

[0028] The utility model discloses an oil-casing 1 separation production process string, comprising an oil casing 1, one end of the oil casing 1 being a liquid outlet end, and the other end being a production liquid inlet, a liquid inlet hole being provided on the circumference of the oil casing 1, and two mutually independent liquid flow channels being provided in the oil casing 1, namely a first liquid flow channel and a second liquid flow channel;

[0029] There are two liquid outlets on the liquid outlet end of the oil jacket 1, namely the central liquid outlet and the annular liquid outlet;

[0030] The first liquid flow channel and the second liquid flow channel are both fixedly provided with a pumping device for pumping the liquid toward the liquid outlet, namely an upper pumping device and a lower pumping device, and the upper pumping device and the lower pumping device are both connected to a driving device for driving the upper pumping device and the lower pumping device, and the driving device is fixedly provided in the oil jacket 1;

[0031] The liquid inlet is connected to the central liquid outlet through a first liquid flow channel, and the liquid collection inlet is connected to the annular liquid outlet through a second liquid flow channel.

[0032] An upper pump barrel 3 and a lower pump barrel 17 are provided in the oil jacket 1. The upper pump barrel 3 is sealed and fixedly connected to the oil jacket 1 through an upper packer 7 sleeved on the upper pump barrel 3. The lower pump barrel 17 is sealed and fixedly connected to the oil jacket 1 through a lower packer 12 sleeved on the lower pump barrel 17.

[0033] The ends of the upper pump barrel 3 and the lower pump barrel 17 facing each other extend into the outer tube 8 from both ends of the outer tube 8 and are sealed and fixedly connected to the outer tube 8;

[0034] The liquid inlet hole is provided on the oil jacket 1 between the upper packer 7 and the lower packer 12;

[0035] The upper pumping device is arranged in the upper pump barrel 3, and the lower pumping device is arranged in the lower pump barrel 17;

[0036] The driving device is arranged in the outer tube 8, and a flow channel is provided between the driving device and the outer tube 8;

[0037] The central tube 6 is provided in the upper pump barrel 3, one end of the central tube 6 is sealed and fixedly connected to the upper pump barrel 3, the other end of the central tube 6 extends into the outer barrel and is sealed and fixedly connected to the drive device, and a liquid passage is provided between the central tube 6 and the upper pump barrel 3;

[0038] A communication hole is also provided on the circumference of the upper pump barrel 3 near the liquid outlet end, and the upper packer 7 and the lower packer 12 are located on the same side of the communication hole;

[0039] The liquid passage is connected to the flow passage via an upper liquid hole provided on the upper pump barrel 3, and the flow passage is connected to the area where the lower pumping device is located via a lower liquid hole provided on the lower pump barrel 17. The liquid passage is connected to the annular space area between the upper pump barrel 3 and the oil jacket 1 via a connecting hole to form a second liquid flow passage; the end of the annular space area between the upper pump barrel 3 and the oil jacket 1 away from the liquid inlet is the annular space outlet;

[0040] The liquid inlet hole is connected to the area where the upper pump liquid device is located through the oil inlet nozzle 15 set on the upper pump barrel 3 and passing through the upper pump barrel 3 and the central tube 6 to form a first liquid flow channel. The end of the area where the upper pump liquid device is located away from the liquid inlet is the central liquid outlet.

[0041] The upper pump liquid device includes an upper fixed valve 2 and an upper connecting rod 5. The upper fixed valve 2 is fixedly arranged in the upper pump barrel 3. One end of the upper connecting rod 5 is connected to the driving device through the center rod, and the other end of the upper connecting rod 5 is connected to the upstream movable valve 4 arranged between the upper fixed valve 2 and the upper connecting rod 5. The upper fixed valve 2 is sealed and slidably connected to the upper pump barrel 3.

[0042] The lower pump liquid device includes a lower fixed valve 11 and a lower connecting rod 16. The lower fixed valve 11 is fixedly arranged in the lower pump barrel 17. One end of the lower connecting rod 16 is connected to the driving device, and the other end of the lower connecting rod 16 is connected to the downstream movable valve 10 arranged between the lower fixed valve 11 and the lower connecting rod 16. The lower fixed valve 11 is sealed and slidably connected to the lower pump barrel 17.

[0043] The driving device connected to the upper pumping device and the lower pumping device is the same driving device, which is a double-acting linear motor 9.

[0044] In one embodiment, the upper pump barrel 3 is connected to the double-acting linear motor 9 through the upper joint, and the lower pump barrel 17 is connected to the double-acting linear motor 9 through the lower joint. The upper connecting rod 5 and the lower connecting rod 16 are respectively located in the upper joint and the lower joint. The upper liquid hole is set on the upper joint, and the lower liquid hole is set on the lower joint.

[0045] The upper liquid hole and the lower liquid hole are both located in the outer cylinder.

[0046] Several liquid inlet holes are provided on the oil jacket 1 between the upper packer 7 and the lower packer 12, and the liquid inlet holes are connected to the oil inlet nozzle 15 through the area surrounded by the upper packer 7, the lower packer 12, the oil jacket 1, the upper pump barrel 3, the outer tube 8 and the lower pump barrel 17.

[0047] In one embodiment, the oil inlet nozzle 15 is provided on the upper joint tube 13 , and the oil inlet nozzle 15 passes through the upper joint tube 13 and the central tube 6 , and is fixed and sealed by means of threads.

[0048] The working principle of the utility model is as follows: After the oil well is completed, two production layers are opened, and the upper packer 7 and the lower packer 12 are used to divide the annulus of the oil casing 1 into three sections, isolating the produced fluid of the two production layers. The produced fluid of the lower production layer enters through the lower fixed valve 11, is pressurized and discharged through the downstream movable valve 10, then passes through the lower fluid hole on the lower joint pipe 14, the flow channel between the double-acting linear motor 9 and the outer pipe 8, the upper fluid hole and the fluid channel on the upper joint pipe 13, and finally enters the annulus area between the upper pump barrel 3 and the oil casing 1 through the connecting hole on the upper pump barrel 3, and is lifted to the surface.

[0049] The produced fluid from the upper production layer enters the area between the upstream movable valve 4 and the upper fixed valve 2 through the liquid inlet, the oil inlet nozzle 15, the space inside the central tube 6, and the upstream movable valve 4. The double-acting motor pushes the upper connecting rod 5 to pressurize and then discharges it through the upper fixed valve 2 and is lifted to the ground through the upper pump pipe, thereby realizing the separate exploitation of two production layers with one set of pipe strings.

[0050] The utility model uses a set of pipe strings to realize the separate mining of two production layers, and the two production layers are mined independently without affecting each other; according to actual conditions, fixed valves, movable valves and connecting rods of different specifications can be replaced to adjust the output of the two production layers, and the utility model is highly practical.

Claims

1. An oil-casing separation production process string, comprising an oil casing, one end of the oil casing being a liquid outlet end and the other end being a production liquid inlet, and a liquid inlet hole being provided on the circumference of the oil casing, characterized in that: The oil jacket is provided with two independent liquid flow channels, namely a first liquid flow channel and a second liquid flow channel; There are two liquid outlets on the liquid outlet end of the oil jacket, namely the central liquid outlet and the annular liquid outlet; A pumping device for pumping liquid toward the liquid outlet is fixedly provided in each of the first liquid flow channel and the second liquid flow channel, namely an upper pumping device and a lower pumping device, and each of the upper pumping device and the lower pumping device is connected to a driving device for driving the upper pumping device and the lower pumping device, and the driving device is fixedly provided in the oil jacket; The liquid inlet is connected to the central liquid outlet through a first liquid flow channel, and the liquid collection inlet is connected to the annular liquid outlet through a second liquid flow channel.

2. The oil casing separation production process string according to claim 1, characterized in that: An upper pump barrel and a lower pump barrel are provided in the oil casing. The upper pump barrel is sealed and fixedly connected to the oil casing via an upper packer sleeved on the upper pump barrel, and the lower pump barrel is sealed and fixedly connected to the oil casing via a lower packer sleeved on the lower pump barrel. The ends of the upper pump barrel and the lower pump barrel facing each other extend into the outer tube from both ends of the outer tube and are sealed and fixedly connected to the outer tube; The liquid inlet hole is provided on the oil jacket between the upper packer and the lower packer; The upper pumping device is arranged in the upper pump barrel, and the lower pumping device is arranged in the lower pump barrel; The driving device is arranged in the outer tube, and an overflow channel is provided between the driving device and the outer tube; The invention also includes a central tube, which is arranged in the upper pump barrel, one end of the central tube is sealed and fixedly connected to the upper pump barrel, the other end of the central tube extends into the outer barrel and is sealed and fixedly connected to the drive device, and a liquid passage is provided between the central tube and the upper pump barrel; A communication hole is further provided on the circumferential surface of the upper pump barrel near the liquid outlet end, and the upper packer and the lower packer are located on the same side of the communication hole; The liquid passage is connected to the flow passage through an upper liquid hole provided on the upper pump barrel, the flow passage is connected to the area where the lower pumping device is located through a lower liquid hole provided on the lower pump barrel, and the liquid passage is connected to the annular space area between the upper pump barrel and the oil jacket through a connecting hole to form a second liquid flow passage; the end of the annular space area between the upper pump barrel and the oil jacket away from the liquid inlet is the annular space liquid outlet; The liquid inlet hole is connected to the area where the upper pump liquid device is located through an oil inlet nozzle arranged on the upper pump barrel and passing through the upper pump barrel and the central tube to form a first liquid flow channel. The end of the area where the upper pump liquid device is located away from the liquid inlet is the central liquid outlet.

3. The oil casing separation production process string according to claim 2, characterized in that: The upper pump liquid device includes an upper fixed valve and an upper connecting rod. The upper fixed valve is fixedly arranged in the upper pump barrel. One end of the upper connecting rod passes through the center rod and is connected to the driving device. The other end of the upper connecting rod is connected to the upstream movable valve arranged between the upper fixed valve and the upper connecting rod. The upper fixed valve is sealed and slidably connected to the upper pump barrel.

4. The oil casing separation production process string according to claim 2, characterized in that: The lower pump liquid device includes a lower fixed valve and a lower connecting rod. The lower fixed valve is fixedly arranged in the lower pump barrel. One end of the lower connecting rod is connected to the driving device, and the other end of the lower connecting rod is connected to the downstream movable valve arranged between the lower fixed valve and the lower connecting rod. The lower fixed valve is sealed and slidably connected to the lower pump barrel.

5. The oil casing separation production process string according to claim 2, characterized in that: The driving device connected to the upper pumping device and the lower pumping device is the same driving device, which is a double-acting linear motor.

6. The oil casing separation production process string according to claim 2, characterized in that: The upper liquid-passing hole and the lower liquid-passing hole are both located in the outer cylinder.

7. The oil casing separation production process string according to claim 2, characterized in that: A plurality of liquid inlet holes are provided on the oil jacket between the upper packer and the lower packer, and the liquid inlet holes are connected to the oil inlet nozzle through the area surrounded by the upper packer, the lower packer, the oil jacket, the upper pump barrel, the outer tube and the lower pump barrel.

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