Single-barrel double-wellhead type screw pump ground driving device

Abstract

The invention relates to the technical field of petroleum mechanical equipment, and particularly discloses a single-barrel double-wellhead type screw pump ground driving device which comprises an oil pumping unit and a polish rod matched with the oil pumping unit, and further comprises a double-wellhead blowout preventer mounted at an oil well, and a supporting box is fixedly mounted at the top of the double-wellhead blowout preventer; the supporting box body is provided with a motor and a driving shell, the polish rod penetrates through one well mouth of the double-well-mouth blowout preventer and is connected with an oil well pump below the well mouth, and the transmission rod penetrates through the other well mouth of the double-well-mouth blowout preventer and is connected with a screw pump below the well mouth. One wellhead extracts oil through a traditional oil pumping unit, the other wellhead extracts oil through a screw pump, the two oil extraction systems can work independently and can also be started at the same time, and therefore the oil extraction efficiency of a single oil well is improved, and the overall oil extraction efficiency of an oil field is improved.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum mechanical equipment, and in particular to a single-tube double-wellhead screw pump ground drive device. Background Art

[0002] With the continuous deepening of oil field development, in order to improve the efficiency of oil extraction, the number of oil wells has increased, resulting in a gradual increase in the density of oil wells in a unit area, making the distance between wellheads closer and closer.

[0003] As a ground device for oil wells, traditional oil pumping units have a fixed oil extraction efficiency. Because they occupy a large area, a small well spacing cannot meet the installation requirements of the oil pumping units, which limits the number of oil wells in a unit oil field and the overall oil production efficiency of the oil field needs to be improved.

[0004] Therefore, it is necessary to propose a single-barrel double-wellhead screw pump ground drive device to improve the oil production efficiency of a single oil well, thereby improving the overall oil production efficiency of the oil field. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the oil production efficiency of oil wells equipped with pumping units is limited, resulting in low overall oil production efficiency in the oil field. A single-cylinder double-wellhead screw pump ground drive device is now provided.

[0006] The technical solution of the present invention is:

[0007] A single-tube double-wellhead screw pump ground drive device includes a pumping unit and a polished rod matched with the pumping unit, and also includes a double-wellhead blowout preventer installed at the oil well, a support box is fixedly installed on the top of the double-wellhead blowout preventer, a motor and a drive housing are installed on the support box, the polished rod passes through one wellhead of the double-wellhead blowout preventer and is connected to the oil pump under the wellhead, and a transmission rod passes through the other wellhead of the double-wellhead blowout preventer and is connected to the screw pump under the wellhead;

[0008] A driving rod, a driven shaft sleeve and a clamp are arranged in the driving housing. The driving rod is rotatably connected to the driving housing. The driven shaft sleeve is sleeved on the outside of the driving rod and rotatably connected to the driving housing. The clamp is sleeved on the outside of the driving rod and rotatably connected to the driving housing. The clamp is fixedly connected to the driven shaft sleeve. The clamp can clamp the driving rod to fix the driving rod and the driven shaft sleeve.

[0009] A driven gear, a driving gear and a spline shaft are also provided in the driving housing. The driven shaft sleeve is coaxially installed with the driven gear sleeve arranged on the outside of the driven shaft sleeve. The driven gear meshes with the driving gear. The driving gear is coaxially fixedly installed at one end of the spline shaft, and the other end of the spline shaft is coaxially fixedly connected to the output shaft of the motor.

[0010] Furthermore, the support box is fixedly connected with a bracket, and the motor is fixedly mounted on the bracket.

[0011] Furthermore, the driven gear and the driving gear are both bevel gears.

[0012] Furthermore, the driven shaft sleeve is rotationally connected to the driving housing through a bearing seat assembly, and the bearing seat assembly realizes transmission through a driven gear and a driving gear.

[0013] Furthermore, a thrust self-aligning tapered roller bearing is provided at the bottom of the driving housing, and the thrust self-aligning tapered roller bearing is sleeved on the outside of the transmission rod, and the thrust self-aligning tapered roller bearing is used to bear the axial load transmitted by the driven shaft sleeve.

[0014] Furthermore, the wellhead where the transmission rod of the double-wellhead blowout preventer is located is provided with a stuffing box sealing device, and an oil pipe is installed in the wellhead where the polished rod is located.

[0015] The present invention discloses a single-tube double-wellhead screw pump ground driving device. By installing a double-wellhead blowout preventer, the pumping unit cooperates with the oil pump to produce oil and the motor drives the screw pump to produce oil. The two oil production methods can cooperate with each other to produce oil together, thereby improving the oil production efficiency. Alternatively, one of them can be selected and started according to the current oil production demand. At one wellhead, the pumping unit drives the oil pump through the bare rod to produce oil. At the other wellhead, the motor drives the spline shaft to rotate, the spline shaft drives the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the driven shaft sleeve to rotate. The clamp clamps the transmission rod at this time, so the transmission rod rotates with the driven shaft sleeve. The transmission rod is connected to the screw pump, so the screw pump is driven by the transmission rod to produce oil. Compared with the traditional technology, the present technical solution opens two wellheads in an oil well. One wellhead produces oil through the traditional pumping unit, and the other wellhead produces oil through the screw pump. The two oil production systems can work independently and can also be started at the same time, thereby improving the oil production efficiency of a single oil well, thereby improving the overall oil production efficiency of the oil field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the combination of the oil pumping unit and the single-barrel double-wellhead screw pump ground drive device of the present invention;

[0017] Figure 2 It is a schematic diagram of a surface drive device of a single-barrel double-wellhead screw pump of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the bearing seat assembly of the present invention.

[0019] Figure numerals: 1. Pumping unit; 2. Bare rod; 3. Double wellhead blowout preventer; 4. Support box; 5. Motor; 6. Drive housing; 7. Transmission rod; 8. Driven shaft sleeve; 9. Clamp; 10. Driven gear; 11. Driving gear; 12. Spline shaft; 13. Bracket; 14. Thrust spherical tapered roller bearing. DETAILED DESCRIPTION

[0020] In order to make the technical means, technical features, invention objectives and technical effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific illustrations.

[0021] Embodiment 1:

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a single-tube double-wellhead screw pump ground drive device, including a pumping unit 1 and a light rod 2 matched with the pumping unit 1, and also includes a double-wellhead blowout preventer 3 installed at the oil well, the top of the double-wellhead blowout preventer 3 is fixedly installed with a support box 4 by screws, the support box 4 is screwed with a motor 5 and a drive housing 6, the light rod 2 passes through one wellhead of the double-wellhead blowout preventer 3 and is connected to the oil pump under the wellhead, the transmission rod 7 passes through the other wellhead of the double-wellhead blowout preventer 3 and is connected to the output end of the screw pump under the wellhead, the drive housing 6 is provided with a transmission rod 7, a driven shaft sleeve 8 and a clamp 9, the transmission rod 7 is rotatably connected to the drive housing 6 through a bearing, and the driven shaft sleeve 8 and the clamp 9 are connected to the drive housing 6. 8 is sleeved on the outside of the transmission rod 7 and is rotatably connected to the drive housing 6, the clamp 9 is sleeved on the outside of the transmission rod 7 and is rotatably connected to the drive housing 6 through a bearing, the clamp 9 is fixedly connected to the driven shaft sleeve 8 by screws, the clamp 9 can clamp the transmission rod 7 to fix the transmission rod 7 to the driven shaft sleeve 8, and a driven gear 10, a driving gear 11 and a spline shaft 12 are also provided in the drive housing 6. The driven shaft sleeve 8 is coaxially mounted with the driven gear 10 sleeved on the outside of the driven shaft sleeve 8, the driven gear 10 is meshed with the driving gear 11, and the driving gear 11 is coaxially fixedly mounted on one end of the spline shaft 12 through a key, and the other end of the spline shaft 12 is coaxially fixedly connected to the output shaft of the motor 5 by screws.

[0023] Preferably, the support box 4 is screw-connected with a bracket 13 , and the motor 5 is screw-mounted on the bracket 13 . The bracket 13 can be used to provide support for the motor 5 .

[0024] Preferably, the driven gear 10 and the driving gear 11 are both bevel gears, which can better bear axial force and radial force to ensure stable operation of the mechanism.

[0025] Preferably, Figure 3 As shown, the driven shaft sleeve 8 is rotatably connected to the driving housing 6 through the bearing seat assembly, and the bearing seat assembly realizes transmission through the driven gear 10 and the driving gear 11. Since the bearing seat assembly is a relatively common structure in the current mechanical transmission field, those skilled in the art can install it by themselves according to specific circumstances. The structure and composition of the bearing seat assembly are not repeated in this article. Preferably, a thrust self-aligning tapered roller bearing 14 is provided at the bottom of the driving housing 6, and the thrust self-aligning tapered roller bearing 14 is sleeved on the outside of the transmission rod 7. The thrust self-aligning tapered roller bearing 14 is used to bear the axial load transmitted by the driven shaft sleeve 8.

[0026] Preferably, the wellhead where the transmission rod 7 on the double-wellhead blowout preventer 3 is located is provided with a stuffing box sealing device, and an oil pipe is installed in the wellhead where the polished rod 2 is located, and the oil pipe can be used to transport oil.

[0027] The output shaft of the motor 5 uses a spline shaft 12 to transmit power, the control box controls the start, stop, forward and reverse rotation of the motor 5, and the resistance cabinet of the motor 5 controls the brake of the motor 5.

[0028] When in use, by installing a double wellhead blowout preventer 3, it is possible to use the pumping unit 1 to cooperate with the oil pump to produce oil, and the motor 5 to drive the screw pump to produce oil. These two oil production methods can cooperate with each other to produce oil together to improve the oil production efficiency, and can also be selected and adopted according to the current oil production demand. At one wellhead, the pumping unit 1 drives the oil pump to produce oil through the bare rod 2, and at the other wellhead, the motor 5 drives the spline shaft 12 to rotate, the spline shaft 12 drives the driving gear 11 to rotate, the driving gear 11 drives the driven gear 10 to rotate, and the driven gear 10 drives The driven shaft sleeve 8 rotates, and the clamp 9 clamps the transmission rod 7 at this time, so the transmission rod 7 rotates together with the driven shaft sleeve 8, and the transmission rod 7 is connected to the screw pump, so the screw pump is driven by the transmission rod 7 to achieve oil production. Compared with the traditional technology, this technical solution opens two wellheads in an oil well, one wellhead produces oil through a traditional oil pump 1, and the other wellhead produces oil through a screw pump. The two oil production systems can work independently or be started at the same time, thereby improving the oil production efficiency of a single oil well, and then improving the overall oil production efficiency of the oil field.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. A single-barrel double-wellhead screw pump surface drive device, comprising a pumping unit (1) and a polished rod (2) matched with the pumping unit (1), characterized in that: It also includes a double-wellhead blowout preventer (3) installed at an oil well, a support box (4) fixedly installed on the top of the double-wellhead blowout preventer (3), a motor (5) and a drive housing (6) installed on the support box (4), a polished rod (2) passing through one wellhead of the double-wellhead blowout preventer (3) and connected to a pump under the wellhead, and a transmission rod (7) passing through the other wellhead of the double-wellhead blowout preventer (3) and connected to a screw pump under the wellhead; A driving housing (6) is provided with a transmission rod (7), a driven shaft sleeve (8) and a clamp (9); the transmission rod (7) is rotatably connected to the driving housing (6); the driven shaft sleeve (8) is sleeved on the outside of the transmission rod (7) and rotatably connected to the driving housing (6); the clamp (9) is sleeved on the outside of the transmission rod (7) and rotatably connected to the driving housing (6); the clamp (9) is fixedly connected to the driven shaft sleeve (8); the clamp (9) can clamp the transmission rod (7) to fix the transmission rod (7) and the driven shaft sleeve (8); A driven gear (10), a driving gear (11) and a spline shaft (12) are also provided in the driving housing (6); the driven shaft sleeve (8) is coaxially mounted with the driven gear (10) which is sleeved on the outer side of the driven shaft sleeve (8); the driven gear (10) is meshed with the driving gear (11); the driving gear (11) is coaxially fixedly mounted on one end of the spline shaft (12); and the other end of the spline shaft (12) is coaxially fixedly connected to the output shaft of the motor (5).

2. The single-tube double-wellhead screw pump surface drive device according to claim 1 is characterized in that: The support box (4) is fixedly connected to a bracket (13), and the motor (5) is fixedly mounted on the bracket (13).

3. The single-cylinder double-wellhead screw pump surface drive device according to claim 1 is characterized in that: The driven gear (10) and the driving gear (11) are both bevel gears.

4. The single-tube double-wellhead screw pump surface drive device according to claim 1 is characterized in that: The driven shaft sleeve (8) is rotationally connected to the driving housing (6) via a bearing seat assembly, and the bearing seat assembly realizes transmission via a driven gear (10) and a driving gear (11).

5. The single-tube double-wellhead screw pump surface drive device according to claim 4 is characterized in that: A thrust self-aligning tapered roller bearing (14) is provided at the bottom of the driving housing (6), and the thrust self-aligning tapered roller bearing (14) is sleeved on the outer side of the transmission rod (7).

6. The single-tube double-wellhead screw pump surface drive device according to claim 1, characterized in that: The wellhead where the transmission rod (7) of the double wellhead blowout preventer (3) is located is provided with a stuffing box sealing device, and an oil pipe is installed in the wellhead where the polished rod (2) is located.

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