阅读说明：本技术 一种采用二节增压的油气混输设备 (Oil-gas mixed transportation equipment adopting two-section pressurization ) 是由 陈明海 陈英峰 柯西 于 2021-01-22 设计创作，主要内容包括：本发明涉及一种采用二节增压的油气混输设备,包括：往复式油气混输泵,具有液力端及动力端,所述液力端包括具有泵体以及活动设于所述泵体的柱塞运行腔中的柱塞,所述泵体还具有进液腔,所述动力端包括机身以及设于机身内的曲轴,所述曲轴与所述柱塞驱动连接；旋转增压泵装置,具有动力输入轴、供流体进入的吸液口以及供流体排出的出液口,所述动力输入轴通过传动机构与所述往复式油气混输泵的曲轴连接,从而与所述往复式油气混输泵共用同一个动力源,所述出液口与所述往复式油气混输泵的进液腔连通。经油气混输设备输出的油气混输流体输出压力高、压缩比大、含气比大,可有效减少外输工况中间建站问题。(The invention relates to an oil-gas mixed transportation device adopting two-section pressurization, which comprises: the reciprocating oil-gas mixed transportation pump is provided with a hydraulic end and a power end, wherein the hydraulic end comprises a pump body and a plunger movably arranged in a plunger running cavity of the pump body, the pump body is also provided with a liquid inlet cavity, the power end comprises a machine body and a crankshaft arranged in the machine body, and the crankshaft is in driving connection with the plunger; the rotary booster pump device is provided with a power input shaft, a liquid suction port for fluid to enter and a liquid outlet for fluid to be discharged, wherein the power input shaft is connected with a crankshaft of the reciprocating oil-gas mixed transportation pump through a transmission mechanism, so that the reciprocating oil-gas mixed transportation pump shares the same power source, and the liquid outlet is communicated with a liquid inlet cavity of the reciprocating oil-gas mixed transportation pump. The oil-gas mixed transportation fluid output by the oil-gas mixed transportation equipment has high output pressure, large compression ratio and large gas content ratio, and can effectively reduce the problem of building a station in the middle of an output working condition.)

1. An oil-gas mixed transportation device adopting two-section pressurization comprises:

the reciprocating oil-gas mixture transfer pump (10) is provided with a hydraulic end and a power end, the hydraulic end comprises a pump body (11) and a plunger (110) movably arranged in a plunger operation cavity of the pump body (11), the pump body (11) is also provided with a liquid inlet cavity, the power end comprises a machine body (12) and a crankshaft (13) arranged in the machine body (12), and the crankshaft (13) is in driving connection with the plunger (110);

it is characterized by also comprising:

rotatory booster pump device (20), have power input shaft (21), supply liquid uptake mouth (22) that the fluid got into and supply fluid exhaust liquid outlet (23), power input shaft (21) pass through drive mechanism (30) with bent axle (13) of reciprocating type oil gas miscarriage pump (10) are connected, thereby with reciprocating type oil gas miscarriage pump (10) share same power supply, liquid outlet (23) with the liquid inlet chamber intercommunication of reciprocating type oil gas miscarriage pump (10).

2. The oil-gas mixed transportation equipment adopting two-section pressurization according to claim 1, characterized in that: the transmission mechanism (30) is a speed-increasing gear transmission pair.

3. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 2, characterized in that: the speed-increasing gear transmission pair comprises a driving gear (31) and a driven gear (32), the driving gear (31) is coaxially connected to the crankshaft (13), and the driven gear (32) is coaxially connected to a power input shaft (21) of the rotary booster pump device (20) and meshed with the driving gear (31).

4. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 3, characterized in that: the booster pump device is characterized in that a bearing seat (14) at the tail end position of the crankshaft (13) is covered on the machine body (12), the rotary booster pump device (20) is connected onto the bearing seat (14) and enables a power input shaft (21) of the booster pump device to stretch into the bearing seat (14), the driving gear (31) is connected to an inner gear ring on the tail end of the crankshaft (13), and the driven gear (32) is located in the bearing seat (14) and meshed with the inner gear ring.

5. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 3, characterized in that: the oil pump is characterized by further comprising a lubricating oil pool (33) arranged between the rotary booster pump device (20) and the machine body (12) of the reciprocating oil-gas multiphase pump (10), and the speed-increasing gear transmission pair is arranged in the lubricating oil pool (33).

6. The oil-gas mixture transportation equipment adopting two-stage pressurization according to any one of claims 1 to 5, characterized in that: the filter (40) is positioned upstream of a liquid suction port (22) of the rotary booster pump device (20), the filter (40) comprises a shell (41), a partition plate member (414) and a filter screen (42), the partition plate member (414) is arranged in an inner cavity of the shell (41) and transversely divides the inner cavity of the shell (41) into an upstream filter cavity (51) and a downstream gas-liquid mixing cavity (52), a communication port (4140) for communicating the filter cavity (51) with the gas-liquid mixing cavity (52) is formed in the bottom of the partition plate member (414), a vent hole (4141) for communicating the filter cavity (51) with the gas-liquid mixing cavity (52) is arranged on the upper portion of the partition plate member (414), the filter screen (42) is a cylindrical filter screen with an upper opening (422), and a conical opening (410) which is large in the upper portion and small in the lower portion is formed in the top wall of the shell (41) corresponding to the filter cavity (51), a pressing cover (412) is hermetically matched on the conical opening (410), and the filter screen (42) is connected to the inner wall of the pressing cover (412) through a connecting rod (43) and forms a portable filter screen assembly together with the pressing cover (412).

7. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 6, characterized in that: be equipped with filter import (53) and filter export (54) on casing (41) of filter (40), filter import (53) with filter chamber (51) intercommunication, filter export (54) with gas-liquid mixing chamber (52) are linked together, be equipped with on the inner wall of casing (41) that top-down slope set up shelve board (55), should shelve board (55) and be located in filter chamber (51) to divide into last cavity (511) and lower cavity (512) with this filter chamber (51), shelve the middle part of board (55) and offer intercommunication last cavity (511) and arrangement mouth (551) of lower cavity (512), the upper portion opening (422) place plane of tube-shape filter screen is the inclined plane, and with the slope direction of shelve board (55) is unanimous, the upper portion opening (422) of tube-shape filter screen have outside extension keep off along (421), the cylindrical filter screen is placed on the periphery of the mounting opening of the resting plate (55) through the retaining edge (421) and extends into the lower chamber (512) of the filter cavity (51), and after the cylindrical filter screen is placed in place, the upper opening (422) of the cylindrical filter screen correspondingly faces the filter inlet (53).

8. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 7, characterized in that: the pressing cover (412) is connected to the top wall of the shell (41) through a push rod bolt (413), and under the state that the pressing cover (412) is pressed in place, a blocking edge (421) of the cylindrical filter screen is correspondingly pressed and matched with the periphery of the mounting opening of the partition plate in a sealing mode.

9. The oil-gas mixture transportation equipment adopting two-stage pressurization according to claim 6, characterized by further comprising:

a return flow regulating line assembly comprising a return line (61) for returning excess fluid to the filter (40), the return line (61) communicating the outlet (23) of the rotary booster pump apparatus (20) and the filter (40), the return line (61) being provided with a first valve (62) for controlling flow;

clean pipeline subassembly on line, include bypass line (71) and locate second valve (72) on bypass line (71), the first port of bypass line (71) with connect through tee bend control valve (73) between filter export (54) of filter (40), the second port of bypass line (71) with correspond to locate the feed liquor takeover (74) of filter import (53) of filter (40) are connected, still be equipped with third valve (75) on feed liquor takeover (74).

10. The oil-gas mixed transportation equipment adopting two-section pressurization as claimed in claim 6, characterized in that: the gas-liquid mixing and conveying device comprises a gas-liquid mixing and conveying device (80), wherein the gas-liquid mixing and conveying device (80) comprises a gas-liquid mixing and conveying pipe (81), a gas pipe (82) and a liquid pipe (83), the gas-liquid mixing and conveying pipe (81) is arranged on a filter outlet (54) of the shell (41) and is provided with a first end extending into a gas-liquid mixing cavity (52) of the filter (40) and a second end exposed out of the filter (40), the second end of the gas-liquid mixing and conveying pipe (81) is connected with a liquid suction port (22) of the rotary booster pump device (20), the gas pipe (82) and the liquid pipe (83) are connected to the first end of the gas-liquid mixing and conveying pipe (81) and are communicated with the gas-liquid mixing and conveying pipe (81), the gas pipe (81) is basically horizontally arranged, the gas pipe (82) extends upwards, the liquid pipe (83) extends downwards, and the gas-liquid mixing and conveying pipe (81) can rotate around the axis of the gas-liquid, thereby adjusting the inlet of the air pipe (82) and the inlet of the liquid pipe (83) to different height positions.

Technical Field

The invention relates to the technical field of oil-gas mixed transportation pumps, in particular to oil-gas mixed transportation equipment adopting two-section pressurization.

Background

The oil-gas mixed transportation technology is a difficult problem at present, and the process equipment applied to oil-gas field transportation at present is a rotary pump and a reciprocating pump, and the abnormal operation condition often occurs in different working conditions. The oil-gas mixed transportation pump, such as a conventional transportation screw pump which is provided with a single-screw pump and a double-screw pump, is generally in the range of lower gas content and compression ratio less than or equal to 5, wherein the reciprocating oil-gas mixed transportation pump is relatively stable when being applied to operate in the compression ratio less than or equal to 5.

However, because a considerable part of oil wells in the current oil field and the output working conditions have low well output pressure and long output distance, the compression ratio of the output oil gas is increased to be large (the compression ratio is generally between 10 and 20), and the difficulty is increased by adopting a one-stage compression process for the pump output. Particularly, the oil-gas field is in different regional environments, the working conditions and the conveying distance routes are different, the oil-gas output ratio and the pressure of the oil-gas well are different, and the obstacle of reliable operation of equipment is caused. According to the reflection of each oil and gas field site, a considerable part of mixed transportation pumps in the existing oil and gas mixed transportation process cannot be transported outside when the compression ratio exceeds 10, and only the sectional transportation is carried out through pipeline laying and intermediate building stations or the outside transportation pressure is increased through supercharging equipment, so that the investment cost is increased, and the land and the polluted and corroded environment are wasted. Therefore, how to provide an oil-gas mixed transportation device with high oil-gas mixed transportation output pressure, large compression ratio and large gas content ratio to meet the domestic field application so as to solve the technical problems of few station building and urgent need to be solved by technical personnel in the field.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides the oil-gas mixed transportation equipment adopting two-section pressurization, which has high output pressure of oil-gas mixed transportation fluid, large compression ratio and large gas content ratio and can effectively reduce the problem of building stations in the middle of an external transportation working condition.

The technical scheme adopted by the invention for solving the technical problems is as follows: an oil-gas mixed transportation device adopting two-section pressurization comprises:

the reciprocating oil-gas mixed transportation pump is provided with a hydraulic end and a power end, wherein the hydraulic end comprises a pump body and a plunger movably arranged in a plunger running cavity of the pump body, the pump body is also provided with a liquid inlet cavity, the power end comprises a machine body and a crankshaft arranged in the machine body, and the crankshaft is in driving connection with the plunger;

the rotary booster pump device is provided with a power input shaft, a liquid suction port for fluid to enter and a liquid outlet for fluid to be discharged, wherein the power input shaft is connected with a crankshaft of the reciprocating oil-gas mixed transportation pump through a transmission mechanism, so that the reciprocating oil-gas mixed transportation pump shares the same power source, and the liquid outlet is communicated with a liquid inlet cavity of the reciprocating oil-gas mixed transportation pump.

The rotary booster pump device can be selected from booster pumps such as a volume screw pump and a rotor pump.

As an improvement, the transmission mechanism is a speed-increasing gear transmission pair.

Specifically, the speed-increasing gear transmission pair can adopt various gear transmission pairs, such as an internal and external meshing gear pair or an external meshing straight gear pair and a bevel gear pair, so as to achieve the purpose of speed-increasing transmission.

As an improvement, the speed-increasing gear transmission pair comprises a driving gear and a driven gear, the driving gear is coaxially connected to the crankshaft, and the driven gear is coaxially connected to a power input shaft of the rotary booster pump device and meshed with the driving gear.

The driving gear of the speed-increasing gear transmission pair can be installed and fixed on the outer diameter of the tail end of the crankshaft of the power end and is fixed in a matched mode through a key groove. The driven gear is installed and fixed on the drive shaft of the rotary booster pump device and can also be fixed through a key slot, and the speed-increasing ratio of the meshed driving gear and the driven gear can be set according to the flow demand of specific oil-gas mixed transportation.

In order to carry out reasonable spatial arrangement on the rotary booster pump device and the reciprocating oil-gas mixed transportation pump so as to enable the whole oil-gas mixed transportation equipment to be more compact and firm, as a preferred embodiment, the machine body is provided with a bearing seat which is covered at the tail end of the crankshaft, the rotary booster pump device is connected to the bearing seat, a power input shaft of the rotary booster pump device extends into the bearing seat, the driving gear is an inner gear ring connected to the tail end of the crankshaft, and the driven gear is positioned in the bearing seat and meshed with the inner gear ring.

As another preferred embodiment, the oil pump further comprises a lubricating oil pool arranged between the rotary booster pump device and the body of the reciprocating oil-gas mixture transfer pump, and the speed-increasing gear transmission pair is arranged in the lubricating oil pool. In the preferred embodiment, the rotary booster pump device is fixedly arranged on the base frame and is connected with a bearing seat flange at the tail end of the crankshaft, a driving gear and a driven gear of the speed-increasing gear transmission pair can both adopt cylindrical gears, and a lubricating oil pool is formed by an oil tank shield. The rotary booster pump adopts a low-pressure output pump (the compression ratio is less than or equal to 5) capable of conveying oil-gas media, and the low-pressure output pump is input into the reciprocating oil-gas mixed conveying pump to carry out two-stage boosting so as to reach a high-pressure oil-gas mixed conveying parameter of 6MPa after being subjected to rotary boosting.

In order to filter the oil-gas mixed fluid before entering the rotary booster pump, effectively remove impurity particles and further prolong the service life of the oil-gas mixed transportation device, the oil-gas mixed transportation device further comprises a filter positioned at the upstream of a liquid suction port of the rotary booster pump device, the filter comprises a shell, a partition plate and a filter screen, the partition plate is arranged in an inner cavity of the shell and transversely divides the inner cavity of the shell into a filter cavity positioned at the upstream and a gas-liquid mixing cavity positioned at the downstream, a communication port for communicating the filter cavity with the gas-liquid mixing cavity is arranged at the bottom of the partition plate, a vent hole for communicating the filter cavity with the gas-liquid mixing cavity is arranged at the upper part of the partition plate, the filter screen is a cylindrical filter screen with an opening at the upper part, a conical opening with the upper part larger than the lower part is arranged on the top wall of the shell corresponding to the filter cavity, the filter screen passes through the connecting rod to be connected compress tightly on the inner wall of lid to compress tightly the lid and constitute portable filter screen subassembly jointly.

Adopt above-mentioned portable filter screen subassembly to make things convenient for and directly propose clearing up the impurity of reserving in the filtering process. In addition, the setting of above-mentioned partition plate spare can make the gas of the oil gas that enters into the filter chamber in time enter into the gas-liquid mixing chamber through the upper portion of partition plate spare of ventilating, makes the gas of the oil gas that enters into the filter chamber pass through the gas-liquid mixing chamber that the intercommunication mouth of the lower part of partition plate spare got into, and then supplies the trachea and the liquid pipe of the gas-liquid mixture transport ware that sets up in the gas-liquid mixing chamber to correspond to inhale gas and liquid, reaches the purpose that the gas-liquid is thoughtlessly transported. The partition plate component is composed of two partitions which are arranged transversely at intervals, so that the supporting strength of the partitions is guaranteed, and deformation caused by fluid impact is avoided.

In order to effectively improve the filtering effect of oil-gas mixed fluid entering a filtering cavity, a shell of the filter is provided with a filter inlet and a filter outlet, the filter inlet is communicated with the filtering cavity, the filter outlet is communicated with the gas-liquid mixing cavity, the inner wall of the shell is provided with a placing plate which is obliquely arranged from top to bottom, the placing plate is positioned in the filtering cavity and divides the filtering cavity into an upper cavity and a lower cavity, the middle part of the placing plate is provided with a placing port communicated with the upper cavity and the lower cavity, the plane of an upper opening of the cylindrical filter screen is an inclined plane and is consistent with the oblique direction of the placing plate, an upper opening of the cylindrical filter screen is provided with a blocking edge which extends outwards, and the cylindrical filter screen is placed on the peripheral edge of a mounting port of the placing plate through the blocking edge and extends into the lower cavity of the filtering cavity, after the cylindrical filter screen is placed in place, the upper opening of the cylindrical filter screen faces the inlet of the filter correspondingly.

In order to facilitate the disassembly and assembly of the cylindrical filter screen and ensure the firmness of the fixation of the cylindrical filter screen, the pressing cover is connected to the top wall of the shell through a mandril bolt, and the blocking edge of the cylindrical filter screen is correspondingly pressed and is in sealing fit with the periphery of the mounting opening of the partition plate when the pressing cover is pressed in place.

As an improvement, the method further comprises the following steps:

the backflow regulating pipeline assembly comprises a backflow pipeline used for returning redundant fluid to the filter, the backflow pipeline is communicated with a liquid outlet of the rotary booster pump device and the filter, and a first valve used for controlling flow is arranged on the backflow pipeline; adopt above-mentioned backflow adjusting pipeline subassembly can be with in part oil-gas mixture fluid backward flow to the filter to can realize adjusting pressure and the flow of part oil-gas mixture fluid before getting into reciprocating type oil-gas multiphase pump's the feed liquor chamber.

On-line clean pipeline subassembly, include with the parallelly connected bypass line that sets up of filter and locating second valve on the bypass line, bypass line's first port with connect through the three way control valve between the filter export of filter, bypass line's second port is located with corresponding the feed liquor takeover of the filter import of filter is connected, still be equipped with the third valve on the feed liquor takeover. Wherein the third valve is located downstream of the connection of the bypass line to the inlet connection. The online cleaning pipeline assembly can be used for cleaning sundries of the filter online and controlling the backflow amount.

As an improvement, the gas-liquid mixing and conveying device further comprises a gas-liquid mixing and conveying device, the gas-liquid mixing and conveying device comprises a gas-liquid mixing and conveying pipe, a gas pipe and a liquid pipe, the gas-liquid mixing and conveying pipe is arranged on the outlet of the filter of the shell and is provided with a first end extending into the gas-liquid mixing cavity of the filter and a second end exposed out of the filter, the second end of the gas-liquid mixing and conveying pipe is connected with the liquid suction port of the rotary booster pump device, the gas pipe and the liquid pipe are connected with the first end of the gas-liquid mixing and conveying pipe and are communicated with the gas-liquid mixing and conveying pipe, the gas-liquid mixing and conveying pipe is basically horizontally arranged, the gas pipe extends upwards, the liquid pipe extends downwards, the gas-liquid mixing and conveying pipe can rotate around the axis of the gas pipe and the inlet of the liquid pipe.

When the oil-gas mixed fluid enters the filter (in the gas-liquid mixing cavity), the conveying positions (height positions) of the gas pipe (inlet) and the liquid pipe (inlet) can be adjusted and set through the rotation of the gas-liquid mixing and conveying pipe of the gas-liquid mixing and conveying device, so that the purpose of mixing and conveying is achieved, and the normal outward conveying of oil gas is realized.

Compared with the prior art, the invention has the advantages that: when the oil-gas mixed fluid is conveyed, mixed gas-liquid at the well head can be sucked by the vacuum degree of the rotary booster pump device, then is subjected to one-stage boosting through the rotary booster pump device (the rotary volume of a screw pump or a rotor pump is changed) ((the compression ratio is improved by less than or equal to 5)), and then is transmitted to the liquid inlet cavity of the reciprocating oil-gas mixed conveying pump, and can be subjected to secondary boosting (the compression ratio is improved by less than or equal to 10) on the basis of pressure provided by the rotary booster pump device under the reciprocating operation action of a plunger of the reciprocating oil-gas mixed conveying pump, so that the input pressure of the oil-gas mixed fluid can reach 5-6MPa, the field conveying condition of an oil-gas field is effectively met. On the other hand, the power of the rotary booster pump device is provided by the power end of the reciprocating oil-gas mixed transportation pump, namely, the rotary booster pump device and the reciprocating oil-gas mixed transportation pump share the same power source, so that a motor or other power sources are not needed, the cost is saved, the integral volume of the oil-gas mixed transportation equipment adopting two-section boosting is reduced, and the occupied space is reduced.

Drawings

FIG. 1 is a front view of an oil-gas mixture transportation apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of the oil-gas mixture transportation device according to the embodiment of the invention;

FIG. 3 is a left side view of the oil-gas mixture transportation apparatus according to the embodiment of the present invention;

FIG. 4 is a top view of a filter according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;

FIG. 7 is a schematic structural diagram of the connection between the reciprocating oil-gas multiphase pump and the rotary booster pump device (the driving gear adopts a cylindrical gear);

fig. 8 is a schematic structural diagram of the connection between the reciprocating oil-gas mixture transfer pump and the rotary booster pump device (the driving gear adopts an inner gear ring) according to the embodiment of the invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1-8, an oil-gas mixed transportation device adopting two-stage pressurization comprises a common base 90, a reciprocating oil-gas mixed transportation pump 10, a rotary booster pump device 20, a transmission mechanism 30, a filter 40, a backflow adjusting pipeline assembly and an online cleaning pipeline assembly. The reciprocating oil-gas mixture transfer pump 10, the rotary booster pump device 20 and the filter 40 are all arranged on the common base 90.

The reciprocating oil-gas mixed transportation pump 10 is provided with a hydraulic end and a power end. The hydraulic end comprises a pump body 11 and a plunger 110 movably arranged in a plunger operating cavity of the pump body 11, and the plunger operating cavity is provided with a packing seal assembly. The pump body 11 also has an inlet chamber (not shown) in line with the inlet pipe 83 and a discharge chamber (not shown) in line with the discharge pipe 15. The power end comprises a machine body 12 and a crankshaft 13 arranged in the machine body 12, and the crankshaft 13 is in driving connection with the plunger 110 through a connecting rod, a crosshead and other transmission structures. The matching structure and the corresponding operation process of the power end and the hydraulic end of the reciprocating oil-gas multiphase pump 10 are the prior art and are not described herein.

The rotary booster pump device 20 is provided with a power input shaft 21, a liquid suction port 22 for fluid to enter and a liquid outlet 23 for fluid to be discharged, the liquid suction port 22 is connected with a filter 40, and the liquid outlet 23 is communicated with a liquid inlet cavity of the reciprocating oil-gas mixed transportation pump 10 through an external pipeline. In the present embodiment, the power input shaft 21 of the rotary booster pump device 20 is connected to the crankshaft 13 of the reciprocating oil-gas mixture pump 10 through the transmission mechanism 30, that is, the rotary booster pump device 20 in the present embodiment does not need to be equipped with a motor or other power source, but shares the same power source with the reciprocating oil-gas mixture pump 10. The rotary booster pump device 20 of the present embodiment may be selected from booster pumps such as a volumetric screw pump and a rotor pump (without a drive source such as a motor).

In this embodiment, the transmission mechanism 30 for transmitting power between the power input shaft 21 of the rotary booster pump device 20 and the crankshaft 13 of the reciprocating oil-gas mixture pump 10 adopts a step-up gear transmission pair to meet the requirement of the rotating speed of the rotary booster pump device 20 and achieve the purpose of primary boosting of the oil-gas mixture fluid. The speed-increasing gear transmission pair can adopt various gear transmission pairs, such as an internal and external meshed gear pair or an external meshed spur gear pair and a bevel gear pair, so as to achieve the purpose of speed-increasing transmission. Specifically, the speed increasing gear transmission pair in the present embodiment includes a driving gear 31 and a driven gear 32, the driving gear 31 is coaxially connected to the crankshaft 13, and the driven gear 32 is coaxially connected to the power input shaft 21 of the rotary booster pump device 20 and is engaged with the driving gear 31. The driving gear 31 of the speed-increasing gear transmission pair may be fixed to the outer diameter (with a step) of the end of the crankshaft 13 at the power end, and may be fixed by a key slot and a bolt. The driven gear 32 is fixedly arranged on a driving shaft of the rotary booster pump device 20 and can also be fixed through a key slot, and the speed increasing ratio of the meshed driving gear 31 and the meshed driven gear 32 can be set according to the specific flow demand of oil-gas mixed transportation.

Referring to fig. 8, as a preferred embodiment, the body 12 is provided with a bearing housing 14 covering an end position of the crankshaft 13, and a rotary booster pump unit 20 is attached to the bearing housing 14. After the booster pump device is connected in place, the power input shaft 21 of the rotary booster pump device 20 extends into the bearing seat 14, and the driven gear 32 is connected to the end part of the power output shaft and is positioned in the bearing seat 14. The driving gear 31 is an inner gear ring connected to the end of the crankshaft 13, and the driven gear 32 is engaged with the inner gear ring to realize speed-up transmission. The transmission structure between the rotary booster pump device 20 and the reciprocating oil-gas mixed transportation pump 10 and other components are reasonably arranged in space, so that the whole oil-gas mixed transportation equipment is more compact and firmer.

Referring to fig. 7, as another preferred embodiment, the rotary booster pump device 20 is fixedly mounted on a base frame and is flange-connected with a bearing seat 14 at the end of the crankshaft 13 of the body 12, wherein a driving gear 31 and a driven gear 32 of the step-up gear transmission pair can both adopt cylindrical gears. The speed-increasing gear transmission pair is arranged in a lubricating oil pool 33 formed by an oil tank shield 34.

The rotary booster pump of the embodiment adopts a low-pressure output pump (the compression ratio is less than or equal to 5) capable of conveying oil-gas media, and the oil-gas media is input into the reciprocating oil-gas mixed conveying pump 10 after being subjected to rotary boosting to carry out two-section boosting so as to reach a high-pressure oil-gas mixed conveying parameter of 6 MPa.

Referring to fig. 1 to 3, the filter 40 is located upstream of the liquid suction port 22 of the rotary booster pump device 20, and is used for filtering the oil-gas mixture fluid entering the rotary booster pump device 20, so as to effectively remove impurity particles, and further improve the service life of the oil-gas mixture transportation device.

Referring to fig. 4 to 6, the filter 40 includes a housing 41, a partition 414, a filter net 42, and a gas-liquid mixer 80. The housing 41 of the filter 40 of the present embodiment is waist-shaped in cross section. The housing 41 of the filter 40 is provided with a filter inlet 53 and a filter outlet 54, the filter inlet 53 is communicated with the filter chamber 51, and the filter outlet 54 is communicated with the gas-liquid mixing chamber 52.

Referring to fig. 5, a partition 414 is provided in the inner cavity of the housing 41 and divides the inner cavity of the housing 41 in the lateral direction into the filter chamber 51 located upstream and the gas-liquid mixing chamber 52 located downstream. The filter screen 42 is arranged in the filter chamber 51, and the gas-liquid mixer 80 is arranged in the gas-liquid mixing chamber 52. The volume of the filter chamber 51 and the gas-liquid mixing chamber 52 can be set according to the gas-liquid ratio. The bottom of the partition plate member 414 is provided with a communication port 4140 for communicating the filter cavity 51 with the gas-liquid mixing cavity 52, the communication port 4140 can pass through the bottom together with liquid, the upper part of the partition plate member 414 is provided with a vent hole 4141 for communicating the filter cavity 51 with the gas-liquid mixing cavity 52, and gas can pass through the upper part, so that separated gas and liquid entering the filter cavity 51 can enter the gas-liquid mixing cavity 52 in time, and the gas-liquid mixed fluid is conveyed out of the filter 40 by the gas-liquid mixed conveyor 80 correspondingly arranged in the gas-liquid mixing cavity 52.

Referring to fig. 5, the partition 414 is formed by two partitions spaced apart in the transverse direction to ensure the supporting strength of the partition 414 and prevent deformation due to fluid impact.

Referring to fig. 6, the filter net 42 of the present embodiment is a cylindrical filter net (basket filter net) having an upper opening 422. The top wall of the housing 41 has a tapered opening 410 with a large top and a small bottom corresponding to the filter chamber 51, a pressing cover 412 is hermetically fitted on the tapered opening 410, and the outer peripheral surface of the pressing cover 412 is also tapered correspondingly to be matched with the tapered opening 410. The filter net 42 is connected to the inner wall of the pressing cap 412 by the connection rod 43, and constitutes a portable filter net assembly together with the pressing cap 412. Specifically, a lever-type handle valve may be disposed on the top wall plane of the housing 41, the above-mentioned pressing cover 412 is used as a valve core, the above-mentioned tapered opening 410 is used as a valve port, by adjusting the ejector bolt 413, the outer circumferential surface of the pressing cover 412 is pressed and attached to the inner wall surface of the tapered opening 410 to form a mutually matched sealing surface (tapered valve surface), and an O-ring 415 is disposed on the tapered valve surface for further sealing.

Adopt above-mentioned portable filter screen subassembly can directly propose, made things convenient for the impurity of filter screen 42 retention in filtering process to clear up. The arrangement of the partition plate 414 can enable the gas of the oil gas entering the filter cavity 51 to enter the gas-liquid mixing cavity 52 in time through the ventilation at the upper part of the partition plate 414, so that the gas of the oil gas entering the filter cavity 51 enters the gas-liquid mixing cavity 52 through the communication port 4140 at the lower part of the partition plate 414, and further the gas pipe 82 and the liquid pipe 83 of the gas-liquid mixed transportation device 80 arranged in the gas-liquid mixing cavity 52 correspondingly suck gas and liquid, thereby achieving the purpose of gas-liquid mixed transportation.

Referring to fig. 6, the inner wall of the housing 41 is provided with a shelf plate 55 disposed obliquely from top to bottom, the shelf plate 55 is located in the filter chamber 51 and divides the filter chamber 51 into an upper chamber 511 and a lower chamber 512, and one side edge of the shelf plate 55 is also connected to the partition plate 414, thereby ensuring the supporting strength of the partition plate 414. The above-mentioned filter screen 42 is placed on the rest plate 55.

Referring to fig. 6, the middle portion of the resting plate 55 is opened with a mounting hole 551 for communicating the upper chamber 511 and the lower chamber 512, and the mounting hole 551 is oval (due to the inclined arrangement of the resting plate 55). The plane of the upper opening 422 of the cylindrical filter screen of the embodiment is an inclined plane and is consistent with the inclined direction of the resting plate 55, the upper opening 422 of the cylindrical filter screen is provided with a blocking edge 421 extending outwards, and the extending direction of the blocking edge 421 is also consistent with the inclined direction of the resting plate 55. The tubular filter screen can thus be placed by this stop edge 421 on the periphery of the mounting opening of the resting plate 55 and deep into the lower chamber 512 of the filter chamber 51. The upper opening 422 of the cylindrical screen corresponds to the facing filter inlet 53 after the cylindrical screen is in place. By adopting the structure design, the filtering area is increased, and the oil-gas mixed fluid can directly enter the filtering net 42, so that the filtering effect is effectively improved.

Referring to fig. 6, on the other hand, the pressing cover 412 of the present embodiment is connected to the top wall of the housing 41 through the ejector bolt 413, and when the pressing cover 412 is pressed in place, the blocking edge 421 of the cylindrical filter screen is correspondingly pressed and tightly fitted on the peripheral edge of the mounting opening of the partition board, so as to facilitate the assembly and disassembly of the cylindrical filter screen and ensure the firmness of the fixation of the cylindrical filter screen,

referring to fig. 5, the gas-liquid mixture feeder 80 includes a gas-liquid mixture feed pipe 81, a gas pipe 82, and a liquid pipe 83. The gas-liquid mixing and transporting pipe 81 is disposed at the filter outlet 54 of the housing 41 and has a first end extending into the gas-liquid mixing chamber 52 of the filter 40 and a second end exposed outside the filter 40, the second end of the gas-liquid mixing and transporting pipe 81 is connected to the liquid suction port 22 of the rotary booster pump device 20, the gas pipe 82 and the liquid pipe 83 are both connected to the first end of the gas-liquid mixing and transporting pipe 81 and are communicated with the gas-liquid mixing and transporting pipe 81, the gas pipe 82 is disposed substantially horizontally, the gas pipe 82 extends upward, the liquid pipe 83 extends downward, the gas-liquid mixing and transporting pipe 81 can rotate around its axis, so as to adjust the inlet of the gas pipe 82 and the inlet of the liquid pipe 83 to different height positions.

When the oil-gas mixed fluid enters the filter 40 (in the gas-liquid mixing chamber 52), the conveying positions (height positions) of the gas pipe 82 (inlet) and the liquid pipe 83 (inlet) can be adjusted and set through the rotation of the gas-liquid mixing pipe 81 of the gas-liquid mixer 80, so that the purpose of mixing and conveying is achieved, and the normal output of oil gas is realized.

Referring to fig. 2, the return regulator line assembly includes a return line 61 for returning excess fluid to the filter 40. A return line 61 communicates the liquid outlet 23 of the rotary booster pump apparatus 20 and the filter 40, and a first valve 62 for controlling the flow rate is provided on the return line 61. A fourth valve 63 is disposed at the position of the liquid outlet 23 of the rotary booster pump device to control the liquid discharge amount and pressure of the output fluid of the rotary booster pump device. By adopting the backflow adjusting pipeline assembly, part of oil-gas mixed fluid can flow back to the filter 40, so that the pressure and the flow of the part of the oil-gas mixed fluid before entering the liquid inlet cavity of the reciprocating oil-gas mixed transportation pump 10 can be adjusted.

With continued reference to fig. 2, the online cleaning pipeline assembly includes a bypass line 71 connected to the filter 40 in parallel, and a second valve 72 disposed on the bypass line 71, wherein a first port of the bypass line 71 is connected to the filter outlet 54 of the filter 40 through a three-way control valve 73, a second port of the bypass line 71 is connected to an inlet pipe 74 correspondingly disposed on the filter inlet 53 of the filter 40, and a third valve 75 is disposed on the inlet pipe 74. Wherein the third valve 75 is located downstream of the connection of the bypass line 71 to the inlet connection 74. The arrangement of the online cleaning pipeline assembly can clean the impurities of the filter 40 and control the return flow online without stopping the machine.

When the oil-gas mixed fluid is conveyed, mixed gas-liquid at the well head can be sucked by the vacuum degree of the rotary booster pump device 20, then is subjected to one-stage boosting (the compression ratio is increased by less than or equal to 5)) through the rotary booster pump device 20 (the rotary volume of a screw pump or a rotor pump is changed), and then is transmitted to the liquid inlet cavity of the reciprocating oil-gas mixed conveying pump 10, and can be subjected to secondary boosting (the compression ratio is increased by less than or equal to 10) on the basis of the pressure provided by the rotary booster pump device 20 under the reciprocating operation action of the plunger 110 of the reciprocating oil-gas mixed conveying pump 10, so that the input pressure of the oil-gas mixed fluid can reach 5-6MPa, the field conveying condition of an oil-gas field can be effectively met. On the other hand, the power of the rotary booster pump device 20 is provided by the power end of the reciprocating oil-gas mixed transportation pump 10, that is, the rotary booster pump device 20 and the reciprocating oil-gas mixed transportation pump 10 share the same power source, so that a motor or other power sources are not needed, the cost is saved, the whole volume of the oil-gas mixed transportation equipment adopting two-section boosting is reduced, and the occupied space is reduced.