CN213870151U - Reciprocating type oil-gas mixed transportation device - Google Patents

Abstract

The utility model relates to a reciprocating type oil gas defeated device that mixes, include: a reciprocating pump; the buffer tank comprises a first inlet, a first outlet and a first gas-liquid mixing and conveying device, and the first gas-liquid mixing and conveying device comprises a first gas-liquid mixing and conveying pipe, a first gas pipe and a first liquid pipe; and the filtering device comprises a shell, a filter screen and a second gas-liquid mixed conveying device, wherein the second gas-liquid mixed conveying device comprises a second gas-liquid mixed conveying pipe, a second gas pipe and a second liquid pipe. When the mixed fluid of oil gas enters into the buffer tank, can adjust the rotation of the first gas-liquid mixed transportation pipe through first gas-liquid mixed transportation ware and set for the air admission, the delivery position of feed liquor pipeline, reach preliminary mixed transportation's purpose, then, when carrying out filterable through the filter equipment, the rotation that can again pass through the second gas-liquid mixed transportation pipe of second gas-liquid mixed transportation ware is adjusted and is set for into, the delivery position of feed liquor pipeline, reach the purpose of mixed transportation once more, make gas-liquid (oil gas) get into reciprocating type oil gas mixed transportation pump's suction chamber, reach the effect of oil gas mixed transportation, the oil well output has been improved.

Description

Reciprocating type oil-gas mixed transportation device

Technical Field

The utility model relates to an oil gas conveying equipment technical field especially relates to a reciprocating type oil gas defeated device that mixes.

Background

Oil and gas conveying equipment at home and abroad generally adopts single or double screw pumps, liquid external pumps, centrifugal pumps, spiral axial-flow pumps, vortex pumps, reciprocating pumps and the like. In onshore and offshore oil fields in China, the oil-gas mixed transportation process is also in the primary stage of test application, and because the oil-gas mixed transportation involves many factors, such as different working conditions, gas-liquid ratio, inlet and outlet pressure difference and transportation mode are all key factors for determining whether equipment can normally operate, how to realize effective mixed transportation of oil and gas is also determined as a world problem.

At present, various devices are adopted to carry out oil-gas mixed transportation under different working conditions, and in practice, oil medium is mainly transported, a small amount of gas is separated, and once the gas resistance occurs, the oil-gas mixed transportation fails. In such cases, it is often necessary to restore plant operation through venting, and venting measures. However, a large amount of natural gas resources are lost in the oil production process, particularly the recovery rate of casing gas and associated gas is extremely low, and because the wellhead is influenced by gas resistance, the back pressure is very high, so that the crude oil yield is prevented, generally, a three-phase filter is arranged at the wellhead in the oil field, and the oil and gas are separated and then conveyed to a destination, so that the process can increase a large amount of ground cost, and only emptying measures can be taken for scattered well positions to realize the crude oil yield.

On the other hand, the oil-gas mixed transportation working condition is inherent to each oil-gas field, and cannot be changed randomly. At present, oil gas is conveyed into a buffer tank (the volume is usually larger than 30M3) from a wellhead pipeline in the existing oil gas conveying process of most oil gas fields, then the oil gas is separated from the buffer tank and enters a separator, the separated oil is conveyed by a pump, and the gas is conveyed by a compressor, wherein the buffer tank is a process tank for separating the oil gas input into the buffer tank by each oil well, and oil-water mixed liquid is conveyed out of the pump in a centralized manner at the bottom of the general buffer tank. The gas at the top of the buffer tank is output by a compressor or a pipeline, and the mode is gas-liquid separate transmission. The liquid level in the buffer tank is lowered through the sub-delivery process, and the return pressure of the wellhead is lowered, so that the yield of the oil well is improved. The buffer tank is provided with a device capable of releasing gas, and when the gas pressure in the buffer tank rises to form a gas resistance which cannot be output by the conveying equipment, the gas is only required to be burnt (a ceiling lamp) or placed in the atmosphere in order to not influence the yield. The current oil and gas field oil and gas transmission process is mainly in the form. The release of natural gas in an air environment is clearly undesirable for environmental protection. The actual conditions of the existing oil-gas mixed transportation equipment applied to each oil-gas field for many years are not ideal.

Therefore, how to provide a mixed transportation device which effectively reduces the wellhead back pressure and realizes the normal outward transportation of oil gas, thereby improving the oil well yield becomes a technical problem to be solved urgently by the technical personnel in the technical field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide one kind and can effectively reduce the well head back pressure, realize the normal defeated outward of oil gas, and then improve the reciprocating type oil gas defeated device that mixes of oil well output.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a reciprocating oil-gas mixture transportation device comprises:

the reciprocating pump comprises a hydraulic end, wherein the hydraulic end is provided with a liquid suction cavity and a liquid discharge cavity;

the buffer tank comprises a first inlet, a first outlet and a first gas-liquid mixing and conveying device, the first inlet is connected with an external conveying pipeline, the first gas-liquid mixing and conveying device comprises a first gas-liquid mixing and conveying pipe, a first gas pipe and a first liquid pipe, the first gas-liquid mixing and conveying pipe is arranged at the first outlet position, the first gas-liquid mixing and conveying pipe is provided with a first end extending into the inner cavity of the buffer tank and a second end exposed out of the buffer tank, the first gas pipe and the first liquid pipe are both connected at the first end of the first gas-liquid mixing and conveying pipe, and is communicated with the first gas-liquid mixing and conveying pipe which is basically horizontally arranged, the first gas pipe is upwards extended, the first liquid pipe extends downwards, the first gas-liquid mixing and conveying pipe can rotate around the axis of the first gas-liquid mixing and conveying pipe, thereby adjusting the inlet of the first gas pipe and the inlet of the first liquid pipe to different height positions;

the filtering device comprises a shell with a gas-liquid mixing cavity, a filtering screen and a second gas-liquid mixing and conveying device, wherein the filtering screen is arranged in the gas-liquid mixing cavity and divides the gas-liquid mixing cavity into a first cavity and a second cavity, the shell is provided with a second inlet communicated with the first cavity and a second outlet communicated with the second cavity, the second inlet is communicated with a second end of the first gas-liquid mixing and conveying pipe, the second gas-liquid mixing and conveying device is arranged at the position of the second outlet and comprises a second gas-liquid mixing and conveying pipe, a second gas pipe and a second liquid pipe, the second gas-liquid mixing and conveying pipe is provided with an inner end extending into the second cavity and an outer end exposed out of the shell, the outer end of the second gas-liquid mixing and conveying pipe is communicated with a liquid suction cavity of the reciprocating pump, and the second gas pipe and the second liquid pipe are connected at the position of the second gas-liquid mixing and conveying pipe and communicated with the second gas-liquid mixing and conveying pipe, the second gas-liquid mixing and conveying pipe is basically horizontally arranged, the second gas pipe extends upwards, the second liquid pipe extends downwards, and the second gas-liquid mixing and conveying pipe can rotate around the axis of the second gas-liquid mixing and conveying pipe, so that the inlet of the second gas pipe and the inlet of the second liquid pipe are adjusted to different height positions.

In order to conveniently arrange the first gas-liquid mixing and conveying device, the first outlet of the buffer tank is positioned in the middle of the buffer tank, a waist-shaped flange is arranged in the first outlet, and the first gas-liquid mixing and conveying pipe is in sealing fit with the waist-shaped flange.

In order to reduce the pulsation of gas-liquid mixed fluid output by the reciprocating pump and achieve the purposes of pressure stabilization, shock absorption and balanced conveying, the reciprocating pump further comprises a gas-liquid exchange pressure stabilizer which is communicated with a liquid discharge cavity of the reciprocating pump and comprises a liquid collecting pipe and two liquid distributing pipes communicated with the liquid collecting pipe, wherein the two liquid distributing pipes are communicated with two liquid discharge pipelines correspondingly connected to the reciprocating pump, the two liquid distributing pipes are connected with the liquid collecting pipe through at least one group of connecting pipes, and the combination positions of the two connecting pipes and the liquid collecting pipe serving as one group are symmetrically arranged relative to the liquid collecting pipe, so that the flow directions of the fluid entering the liquid collecting pipe through the two connecting pipes are opposite. The structure is characterized in that the discharged liquid of the reciprocating pump is conveyed to the liquid collecting pipe through the two liquid distributing pipes, wherein the liquid in the two liquid distributing pipes collides with each other to subtract corresponding pulsation when entering the liquid collecting pipe through the two connecting pipes, the gas-liquid mixed fluid is continuously exchanged to a found position from top to bottom and from bottom to top along with the difference of the specific weights of gas and liquid, and finally is discharged into an output pipeline along with the flow speed, at the moment, the oil gas basically loses the pulsation waveform, and can gradually cling to oil along with the compression of the gas in the pipe cavity to eliminate the phenomenon of flow interruption, so that the purposes of oil-gas distribution and mixed transportation are achieved.

In order to reasonably arrange the liquid separating pipes and the liquid collecting pipes of the gas-liquid exchange pressure stabilizer and reduce the occupied space, the two liquid separating pipes and the liquid collecting pipes are arranged side by side and are fixed through the connecting frame.

As an improvement, the connecting pipes are provided with at least two groups, and the liquid pipes of all the groups are mutually connected in parallel.

When carrying out the oil-gas mixture through reciprocating pump and defeated, oil-gas mixture fluid enters into back in reciprocating pump's the imbibition chamber, and gaseous phase component reveals away from the lubricating oil filler seal part of piston rod periphery easily, in order to solve this problem, still includes the sealed gas leakage recovery unit that prevents of piston rod, and it includes: the recovery tank is communicated with the lubricating oil filler sealing part of the reciprocating pump through a first gas return pipeline so that gas leaked from the lubricating oil filler sealing part of the reciprocating pump enters the recovery tank, and the recovery tank is also communicated with a liquid inlet pipeline correspondingly connected to the position of the liquid suction cavity of the reciprocating pump through a second gas return pipeline so that the gas stored in the recovery tank is sucked into the liquid suction cavity of the reciprocating pump in the operation process of the reciprocating pump.

In order to clean up the filtration impurities trapped by the filter screen conveniently, the shell of the filtration device comprises a shell body with an open upper part and a cover body covering the open part, and the filter screen is a portable filter screen which can be taken out from a gas-liquid mixing cavity of the shell through the opening.

As the improvement, still include the heat dissipation base, reciprocating pump and filter equipment all settle on this heat dissipation base, have the circulating water cooling system who is used for cooling down to the pump body of reciprocating pump on this heat dissipation base. When the oil-gas mixed fluid is conveyed, particularly when the mixed fluid with high gas content is conveyed, heat generated by gas compression is mainly concentrated in the hydraulic end of the reciprocating pump, and the cooling water in the heat dissipation base performs circulating heat exchange on the heating cavity of the pump body of the reciprocating pump and the gas-liquid exchange pressure stabilizer to achieve the purpose of cooling.

As an improvement, the circulating water cooling system comprises a circulating water pump, a heat exchange tank and a cooling water circulating pipeline, wherein the circulating water pump is arranged on the cooling water circulating pipeline, and the cooling water circulating pipeline is communicated with the heat exchange tank through a heating cavity of the pump body at the hydraulic end of the reciprocating pump.

In order to improve the heat dissipation efficiency of the base, the bottom of the heat dissipation base is provided with a heat dissipation plane which can be attached and contacted with an external shelving area, and the periphery of the heat dissipation base is provided with heat dissipation fins.

Compared with the prior art, the utility model has the advantages that: the gas-liquid mixed conveying device comprises a buffer tank, a filter device, a first gas-liquid mixed conveying pipe, a second gas-liquid mixed conveying pipe, a gas-liquid mixed conveying pipe and a gas-liquid mixed conveying pipe, wherein the buffer tank and the filter device are arranged in front of the reciprocating pump, the gas-liquid mixed conveying device is arranged in the buffer tank, the first gas-liquid mixed conveying device is arranged in the buffer tank, the second gas-liquid mixed conveying device is arranged in the filter device, and the gas-liquid mixed conveying device can adjust and set the conveying positions of the gas-liquid mixed conveying pipe and the gas-liquid mixed conveying pipe through rotation of the second gas-liquid mixed conveying pipe of the first gas-liquid mixed conveying device when the gas-liquid mixed conveying fluid enters the gas-liquid mixed conveying chamber of the filter device, so that the purpose of mixing and conveying again is achieved. Compared with the conventional gas-liquid separate transportation and mixed transportation equipment in the prior art, the reciprocating oil-gas mixed transportation device can effectively reduce the back pressure of a wellhead and realize the normal outward transportation of oil gas, thereby further improving the yield of an oil well.

Drawings

Fig. 1 is a front view of an embodiment of the present invention;

fig. 2 is a top view of an embodiment of the present invention;

fig. 3 is a right side view of an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a filtering apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a gas-liquid exchange pressure stabilizer according to an embodiment of the present invention;

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

FIG. 7 is a schematic structural view of the connection assembly of the buffer tank and the filtering device according to the embodiment of the present invention;

fig. 8 is a schematic structural view of the piston rod sealing air leakage prevention recovery device according to the embodiment of the present invention;

fig. 9 is a schematic structural view of a heat dissipation base according to an embodiment of the present invention;

fig. 10 is a schematic top view of a heat dissipation base according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a fluid end of a reciprocating pump according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1-11, a reciprocating oil-gas mixture transportation device includes a reciprocating pump 10, a buffer tank 20, a filtering device 30, a gas-liquid exchange pressure stabilizer 40, a piston rod sealing gas leakage prevention recovery device 50, and a heat dissipation base 60. The reciprocating pump 10, the filtering device 30, the gas-liquid exchange pressure stabilizer 40 and the piston rod sealing gas leakage prevention recovery device 50 are all arranged on the heat dissipation base 60.

Referring to fig. 11, the reciprocating pump 10 of the present embodiment may be of a single-acting or double-acting pump body 17 configuration. The reciprocating pump 10 includes a fluid end and a power end. The hydraulic ends can be vertical hydraulic ends and horizontal hydraulic ends, the horizontal and vertical valve banks are correspondingly arranged, and the hydraulic ends with different structures can be selected according to different gas-liquid working conditions. The pump body 17 at the fluid end has a suction chamber 18 and a discharge chamber 19. And a sealing packing 15 is arranged between the piston rod 16 at the hydraulic end and the inner wall of the piston channel of the reciprocating pump 10, and lubricating oil can be introduced into the sealing packing 15 for antifriction lubrication. The liquid discharge cavity 19 of the pump body 17 of the reciprocating pump 10 can be provided with a left pipeline and a right pipeline which are combined and enter the gas-liquid exchange pressure stabilizer 40 to reduce the vibration caused by the pulsation of gas and liquid, and the structure of the gas-liquid exchange pressure stabilizer 40 is described in detail below.

Referring to fig. 1 to 3, the heat dissipation base 60 is a basic platform for mounting the reciprocating pump 10, the filtering device 30, the gas-liquid exchange pressure stabilizer 40, and the piston rod sealing gas leakage prevention recovery device 50. The upper plane of the heat dissipation base 60 is provided with a plane foot plate for mounting the reciprocating pump 10, and the reciprocating pump and the heat dissipation base 60 can be fixed by bolts. The guide rail is arranged on the rear plane of the heat radiation base 60 and can be provided with a motor 13, a transmission belt 14 and other transmission mechanisms which are used for being connected with the power end of the reciprocating pump 10. The filter device 30 is installed on the side of the heat sink base 60. The bottom plane of the heat dissipation base 60 is a concave-convex heat dissipation plane, and can be in contact with the foundation concrete in a fitting manner, so that heat dissipation is directly performed, and a good heat dissipation effect is achieved. In addition, the radiating fins 65 are arranged around the radiating base 60, so that the surface area of contact with air is increased, and the convection radiating efficiency is increased. Longitudinal and transverse rib plates are further arranged in the inner cavity of the heat dissipation base 60 to increase the strength and rigidity of the heat dissipation base 60.

Referring to fig. 9 and 10, the heat sink base 60 has an inner cavity for installing the circulating water cooling system 61 and the gas-liquid exchange regulator 40. The circulating water cooling system 61 includes a circulating water pump 62, a heat exchange tank, and a cooling water circulation line 64. Specifically, the water circulation pump 62 may be disposed at the rear motor rail side of the upper plane of the heat dissipation base 60 to circulate the cooling water in the heat dissipation base 60 and perform water-cooling heat exchange on the heat generating portion of the hydraulic end of the reciprocating pump 10 to take away the heat generated in the air compression process. When the oil-gas mixed fluid is conveyed, especially when the mixed fluid containing high-content gas medium is conveyed, the heat generated by gas compression is mainly concentrated in the hydraulic end of the reciprocating pump 10, and the cooling water in the heat dissipation base 60 performs circulating heat exchange on a heating cavity (not shown) of the pump body 17 of the reciprocating pump 10 and the gas-liquid exchange pressure stabilizer 40, so as to achieve the purpose of cooling. Specifically, the circulation water pump 62 is provided on a cooling water circulation line 64, and the cooling water circulation line 64 communicates with the heat exchange tank via the heat generation chamber of the pump body 17 at the hydraulic end of the reciprocating pump 10. The heat exchange tank is used for storing cooling water to be mixed with hot water which takes away heat generated by a heating cavity of a pump body 17 of the reciprocating pump 10 to realize cooling.

When the oil-gas mixed fluid is conveyed, since the heat generated by gas compression is mainly concentrated in the hydraulic end of the reciprocating pump 10, the temperature of the gas-liquid exchange pressure stabilizer 40 connected with the hydraulic end of the reciprocating pump 10 is correspondingly higher, and for this reason, the circulating water cooling system 61 in the heat dissipation base 60 can also be used for heat dissipation and temperature reduction of the gas-liquid exchange pressure stabilizer 40, which is described in detail below.

The buffer tank in the prior art is a process tank for gas-liquid separation by inputting oil gas into the buffer tank from each oil well, generally, oil-water mixed fluid is intensively output from the bottom of the buffer tank by a pump, gas is output from the top of the buffer tank by a compressor or a pipeline, and the mode is gas-liquid separation. In the embodiment, the gas and the oil in the buffer tank 20 enter one pipeline for conveying, namely, the gas and the oil are conveyed simultaneously, in the prior art, because the pressure of the oil and the pressure of the gas in the buffer tank 20 are equal, the conveying requirement is difficult to meet on site in the process of carrying out the oil and gas conveying simultaneously, the oil and the gas are difficult to enter the inlet of the pump simultaneously because the pressure of the oil and the gas is equal, and the inlet of the pump, which cannot enter the gas in the process of actual conveying, is blocked by the oil.

To this end, the buffer tank 20 in this embodiment includes a first inlet 21, a first outlet 22, and a first gas-liquid mixer 23, and the first inlet 21 is connected to an external transfer line. The first gas-liquid mixer 23 includes a first gas-liquid mixing and delivering pipe 24, a first gas pipe 25 and a first liquid pipe 26. The first gas-liquid mixing and transporting pipe 24 is arranged at the position of the first outlet 22, and the first gas-liquid mixing and transporting pipe 24 has a first end extending into the inner cavity of the buffer tank 20 and a second end exposed out of the buffer tank 20. The first gas-liquid mixing and transporting pipe 24 is basically horizontally arranged, the first gas pipe 25 is connected to a first end position of the first gas-liquid mixing and transporting pipe 24, communicated with the first gas-liquid mixing and transporting pipe 24 and extends upwards, and the first liquid pipe 26 is also connected to a first end position of the first gas-liquid mixing and transporting pipe 24, communicated with the first gas-liquid mixing and transporting pipe 24 and extends downwards, so that the first gas-liquid mixing and transporting device 23 composed of the first gas-liquid mixing and transporting pipe 24, the first gas pipe 25 and the first liquid pipe 26 is T-shaped on the whole. The first gas-liquid mixing and transporting pipe 24 can rotate around its own axis, so that the inlet of the first gas pipe 25 and the inlet of the first liquid pipe 26 can be adjusted to different height positions. The second end of the first gas-liquid mixing and conveying pipe 24 can be connected with the inlet of the subsequent filtering device 30 through a pipeline, which is shown in detail in fig. 3 and 7.

Referring to fig. 7, the first outlet 22 of the buffer tank 20 is located at the middle position of the buffer tank 20, a waist-shaped flange 27 is arranged in the first outlet 22, and the first gas-liquid mixture conveying pipe 24 is hermetically fitted on the waist-shaped flange 27 and can be rotatably adjusted around the axis of the first gas-liquid mixture conveying pipe.

With continued reference to fig. 7, a filter device 30 is disposed downstream of the buffer tank 20 and upstream of the reciprocating pump 10 for filtering the gas-liquid mixture fluid before entering the reciprocating pump 10 to remove impurities. Specifically, the filtering device 30 is installed on the heat dissipation base 60, and is provided with an inlet flange connected to a pipeline for on-site gas-liquid transportation, an outlet flange connected to an inlet of the reciprocating pump 10, and a gate valve 28, a tee joint, an elbow, a pressure transmitter, etc. on the corresponding pipeline to control the amount of gas and liquid entering and to close the flow direction of gas and liquid during maintenance.

Referring to fig. 4, the filter device 30 includes a housing 31 having a gas-liquid mixing chamber 34, a filter screen 35, and a second gas-liquid mixer 36. The filter screen 35 is provided in the gas-liquid mixing chamber 34, and divides the gas-liquid mixing chamber 34 into a first chamber 341 and a second chamber 342. The housing 31 has a second inlet 32 communicating with the first chamber 341 and a second outlet 33 communicating with the second chamber 342, and the second inlet 32 communicates with the second end of the first gas-liquid mixture transportation pipe 24. The second gas-liquid mixture transport device 36 includes a second gas pipe 37, a second liquid pipe 38, and a second gas-liquid mixture transport pipe 39, and the second gas-liquid mixture transport pipe 39 is hermetically fitted at the position of the second outlet 33. Specifically, the second gas-liquid mixing and transporting pipe 39 has an inner end extending into the second chamber 342 and an outer end exposed outside the housing 31, the outer end of the second gas-liquid mixing and transporting pipe 39 is communicated with the liquid suction cavity 18 of the reciprocating pump 10, and the inner end of the second gas-liquid mixing and transporting pipe 39 is connected with a second gas pipe 37 for allowing the gas in the housing 31 to enter the second gas-liquid mixing and transporting pipe 39 and a second liquid pipe 38 for allowing the liquid in the second chamber 342 to enter the second gas-liquid mixing and transporting pipe 39. The second gas-liquid mixing and transporting pipe 39 is arranged substantially horizontally, the second gas pipe 37 is arranged to extend upward, and the second liquid pipe 38 is arranged to extend downward. The second gas-liquid mixture transport device 36 including the second gas-liquid mixture transport pipe 39, the second gas pipe 37, and the second liquid pipe 38 is T-shaped as a whole. The second gas-liquid mixing and transporting pipe 39 can rotate around its own axis, so that the inlet of the second gas pipe 37 and the inlet of the second liquid pipe 38 can be adjusted to different height positions.

With reference to fig. 4, in order to clean the filtering impurities trapped by the filtering net 35, the housing 31 of the filtering device 30 includes a housing body 311 with an upper opening and a cover body 311 covering the opening. The filter screen 35 is a portable filter screen that can be taken out from the gas-liquid mixing chamber 34 of the housing 31 through an opening.

The filtering device 30 of the present embodiment has two functions, one of which is that a liftable filtering net 35 is arranged in the filtering device 30 to clean the filtering impurities retained by the filtering net 35; secondly, a second gas-liquid mixed transportation device 36 is arranged to mix oil gas at different positions, and the oil gas is controlled to enter a suction cavity of the reciprocating pump 10 after being mixed at different liquid levels, so that the purpose of gas-liquid mixed transportation is achieved.

The buffer tank 20 and the filtering device 30 before the oil-gas mixed fluid is sucked into the reciprocating pump 10 are respectively provided with a gas-liquid mixed transportation device, namely a first gas-liquid mixed transportation device 23 arranged in the buffer tank 20 and a second mixed transportation device arranged in the filtering device 30, wherein when the oil-gas mixed fluid enters the buffer tank 20, the conveying positions of gas inlet and liquid inlet pipelines can be adjusted and set through the rotation of a first gas-liquid mixed transportation pipe 24 of the first gas-liquid mixed transportation device 23 to achieve the primary mixed transportation purpose, and then after the oil-gas mixed fluid enters a gas-liquid mixing cavity 34 of the filtering device 30, the oil-gas mixed transportation device filters through the filtering device 30, and simultaneously, the conveying positions of the gas inlet and liquid inlet pipelines can be adjusted and set through the rotation of a second gas-liquid mixed transportation pipe 39 of the second gas-liquid mixed transportation device 36 to achieve the secondary mixed transportation purpose, so that the gas (oil gas) can effectively enter the suction cavity of the reciprocating oil-gas mixed transportation pump, the effect of oil-gas mixed transportation is achieved. Compared with the conventional gas-liquid separate transportation and mixed transportation equipment in the prior art, the reciprocating oil-gas mixed transportation device can effectively reduce the back pressure of a wellhead and realize the normal outward transportation of oil gas, thereby further improving the yield of an oil well.

Referring to fig. 5 and 6, in order to reduce the pulsation of the gas-liquid mixture output by the reciprocating pump 10 and achieve the purposes of stabilizing pressure, damping vibration, and balancing delivery, the gas-liquid exchange stabilizer 40 of the present embodiment is disposed downstream of the reciprocating pump 10, and specifically, is communicated with the liquid discharge chamber 19 of the reciprocating pump 10. The gas-liquid exchange stabilizer 40 comprises a liquid collecting pipe 42 and two liquid separating pipes 41 communicated with the liquid collecting pipe 42, wherein the two liquid separating pipes 41 are communicated with the two liquid outlet pipelines 12 correspondingly connected to the reciprocating pump 10, the two liquid separating pipes 41 are connected with the liquid collecting pipe 42 through at least one group of connecting pipes 410, and the combination positions of the two connecting pipes 410 and the liquid collecting pipe 42 as a group are symmetrically arranged relative to the liquid collecting pipe 42, so that the flow directions of the fluid entering the liquid collecting pipe 42 through the two connecting pipes 410 are opposite. In order to arrange the liquid separating pipe 41 and the liquid collecting pipe 42 of the gas-liquid exchange pressure stabilizer 40 reasonably and reduce the occupied space, the two liquid separating pipes 41 and the two liquid collecting pipes 42 are arranged side by side and fixed by a connecting frame 43. It is conceivable that there may be one, two, or more than two groups of liquid distribution pipes 41 of the gas-liquid exchange pressure stabilizer 40 in this embodiment, wherein the liquid distribution pipes 41 are connected in parallel, and specifically, multiple groups of connection pipes 410 with corresponding number may be selected according to different gas-liquid flow rates of actual working conditions, so as to achieve the purpose of pressure-stabilizing, damping, and balanced delivery of the mixed fluid. In the embodiment, two liquid distributing pipes 41 and a liquid collecting pipe 42 are connected by a set of connecting pipes 410.

The gas-liquid exchange stabilizer 40 is to convey the discharged liquid of the reciprocating pump 10 to the liquid collecting pipe 42 through the two liquid separating pipes 41, wherein the liquids in the two liquid separating pipes 41 collide with each other when entering the liquid collecting pipe 42 through the two connecting pipes 410 to subtract corresponding pulsation, the gas-liquid mixed liquid is continuously exchanged to a found position from top to bottom and from bottom to top along with the difference of the gas-liquid specific weights, and finally discharged into an output pipeline along with the uniform flow velocity, at this time, the oil gas basically loses the pulsation waveform, and can gradually cling to oil along with the compression of the gas in the pipe cavity to eliminate the phenomenon of flow interruption, thereby achieving the purpose of oil-gas separate transportation and mixed transportation.

Referring to fig. 8, in the case of oil-gas mixture transportation by the reciprocating pump 10, after the oil-gas mixture fluid enters the liquid suction chamber 18 of the reciprocating pump 10, the gas phase component is easily leaked from the lubricant packing seal portion on the outer periphery of the piston rod 16, and in order to solve this problem, the present embodiment is provided with the above-described piston rod seal gas leakage prevention recovery device 50. The piston rod seal gas leakage recovery device 50 comprises a recovery tank 51, a first gas return line 52 and a second gas return line 53. Wherein the recovery tank 51 is in communication with the lube packing seal of the reciprocating pump 10 through a first gas return line 52 such that gas leaking from the lube packing seal of the reciprocating pump 10 enters the recovery tank 51. The recovery tank 51 is also communicated with the liquid inlet line 11 correspondingly connected to the position of the liquid suction chamber 18 of the reciprocating pump 10 through the second gas return line 53, so that the gas stored in the recovery tank 51 is sucked into the liquid suction chamber 18 of the reciprocating pump 10 during the operation of the reciprocating pump 10.

Referring to fig. 11, the lubricant packing seal portion of the reciprocating pump 10 includes a seal packing 15, a lubricant tank 54, and a lubricant replenishment line 55. A packing 15 is provided between the piston rod 16 and the inner wall of the piston channel of the reciprocating pump 10, in particular, the packing 15 includes a first packing portion 151, a second packing portion 152, and an oil ring 153, the oil ring 153 being located between the first packing portion 151 and the second packing portion 152 to space the first packing portion 151 from the second packing portion 152. Specifically, the oil ring 153 has oil holes 1530 for taking in and discharging oil, and the lubricating oil tank 54 communicates with the oil holes 1530 of the oil ring 153 through the oil supply line 55. The first air return line 52 may be in communication with an oil supply line 55 or a lubricating oil tank 54, and specifically, the first air return line 52 may be a metal hose or a hard pipe and connected to an upper portion of the lubricating oil tank 54. In order to facilitate smooth entry of the gas into the recovery tank 51, the recovery tank 51 is higher than the lubricant tank 54, and specifically, the total installation height of the recovery tank 51 should be higher than 1/2 of the lubricant tank 54.

The reciprocating pump 10 of the present embodiment has a plurality of pump chambers, the lubricant tank 54 communicates with the lubricant packing sealed portion in each pump chamber through a plurality of oil supply lines 55, and a plurality of second air return lines 53 communicate with the corresponding liquid inlet lines 11 in each pump chamber.

When the piston rod 16 of the reciprocating pump 10 operates in a reciprocating mode, gas leaked from the oil hole 1530 of the oil ring 153 at the lubricating oil filler sealing part of the reciprocating pump 10 moves upwards to enter the recovery tank 51 of the piston rod sealing gas leakage prevention recovery device 50 through the first gas return pipeline 52, and the recovery tank 51 is communicated with the liquid inlet pipeline 11 of the reciprocating pump 10 through the second gas return pipeline 53, so that the leaked gas can be continuously sucked into the recovery device along with the continuous operation of the suction function of the reciprocating pump 10 and then sucked into the liquid suction cavity 18 of the reciprocating pump 10, the reciprocating circulation is realized, the purpose that the piston rod 16 is sealed and does not leak gas is achieved, and the working environment of the gas-liquid mixed conveying device on site is improved.

Claims (10)

1. A reciprocating oil-gas mixture transportation device comprises:

the reciprocating pump (10) comprises a hydraulic end, wherein the hydraulic end is provided with a liquid suction cavity (18) and a liquid discharge cavity (19);

it is characterized by also comprising:

the buffer tank (20) comprises a first inlet (21), a first outlet (22) and a first gas-liquid mixing and conveying device (23), wherein the first inlet (21) is connected with an external conveying pipeline, the first gas-liquid mixing and conveying device (23) comprises a first gas-liquid mixing and conveying pipe (24), a first gas pipe (25) and a first liquid pipe (26), the first gas-liquid mixing and conveying pipe (24) is arranged at the position of the first outlet (22), the first gas-liquid mixing and conveying pipe (24) is provided with a first end extending into an inner cavity of the buffer tank (20) and a second end exposed out of the buffer tank (20), the first gas pipe (25) and the first liquid pipe (26) are both connected at the first end of the first gas-liquid mixing and conveying pipe (24) and communicated with the first gas-liquid mixing and conveying pipe (24), the first gas-liquid mixing and conveying pipe (24) is basically horizontally arranged, and the first gas pipe (25) extends upwards, the first liquid pipe (26) extends downwards, and the first gas-liquid mixing and conveying pipe (24) can rotate around the axis of the first gas-liquid mixing and conveying pipe, so that the inlet of the first gas pipe (25) and the inlet of the first liquid pipe (26) are adjusted to different height positions;

the filtering device (30) comprises a shell (31) with a gas-liquid mixing cavity (34), a filter screen (35) and a second gas-liquid mixing and conveying device (36), wherein the filter screen (35) is arranged in the gas-liquid mixing cavity (34) and divides the gas-liquid mixing cavity (34) into a first cavity (341) and a second cavity (342), the shell (31) is provided with a second inlet (32) communicated with the first cavity (341) and a second outlet (33) communicated with the second cavity (342), the second inlet (32) is communicated with the second end of the first gas-liquid mixing and conveying pipe (24), the second gas-liquid mixing and conveying device (36) is arranged at the position of the second outlet (33) and comprises a second gas-liquid mixing and conveying pipe (39), a second gas pipe (37) and a second liquid pipe (38), the second gas-liquid mixing and conveying pipe (39) is provided with an inner end extending into the second cavity (342) and an outer end exposed out of the shell (31), the outer end of the second gas-liquid mixing and conveying pipe (39) is communicated with the liquid suction cavity (18) of the reciprocating pump (10), the second gas pipe (37) and the second liquid pipe (38) are connected to the inner end of the second gas-liquid mixing and conveying pipe (39) and communicated with the second gas-liquid mixing and conveying pipe (39), the second gas-liquid mixing and conveying pipe (39) is basically horizontally arranged, the second gas pipe (37) extends upwards, the second liquid pipe (38) extends downwards, and the second gas-liquid mixing and conveying pipe (39) can rotate around the axis of the second gas pipe and the second liquid pipe (38) so that the inlet of the second gas pipe and the inlet of the second liquid pipe (38) can be adjusted to different height positions.

2. The reciprocating oil-gas mixture transfer device according to claim 1, characterized in that: the first outlet (22) of the buffer tank (20) is positioned in the middle of the buffer tank (20), a waist-shaped flange (27) is arranged in the first outlet (22), and the first gas-liquid mixing and conveying pipe (24) is in sealing fit with the waist-shaped flange (27).

3. The reciprocating oil-gas mixture transfer device according to claim 1, further comprising:

the gas-liquid exchange pressure stabilizer (40) is communicated with the liquid discharge cavity (19) of the reciprocating pump (10) and comprises a liquid collecting pipe (42) and two liquid distributing pipes (41) communicated with the liquid collecting pipe (42), the two liquid distributing pipes (41) are communicated with two liquid outlet pipes (12) correspondingly connected to the reciprocating pump (10), the two liquid distributing pipes (41) are connected with the liquid collecting pipe (42) through at least one group of connecting pipes (410), and the combination positions of the two connecting pipes (410) and the liquid collecting pipe (42) which are taken as one group are symmetrically arranged relative to the liquid collecting pipe (42), so that the flow directions of fluid entering the liquid collecting pipe (42) through the two connecting pipes (410) are opposite.

4. The reciprocating oil-gas mixture transfer device according to claim 3, wherein: the two liquid separating pipes (41) and the liquid collecting pipe (42) are arranged side by side and fixed through a connecting frame (43).

5. The reciprocating oil-gas mixture transfer device according to claim 4, wherein: the connecting pipes (410) are at least two groups, and the connecting pipes (410) of each group are mutually connected in parallel.

6. The reciprocating oil-gas mixture transfer device according to claim 1, characterized in that: still include piston rod seal gas leakage recovery unit (50), it includes: and the recovery tank (51), the recovery tank (51) is communicated with the lubricating oil packing sealing part of the reciprocating pump (10) through a first gas return line (52) so that gas leaked from the lubricating oil packing sealing part of the reciprocating pump (10) enters the recovery tank (51), and the recovery tank (51) is also communicated with a liquid inlet line (11) correspondingly connected to the position of the liquid suction cavity (18) of the reciprocating pump (10) through a second gas return line (53) so that the gas stored in the recovery tank (51) is sucked into the liquid suction cavity (18) of the reciprocating pump (10) during the operation of the reciprocating pump (10).

7. The reciprocating oil-gas mixture transfer device according to claim 1, characterized in that: the shell (31) of the filtering device (30) comprises a shell body (310) with an open upper part and a cover body (311) covering the open part, and the filter screen (35) is a portable filter screen which can be taken out from a gas-liquid mixing cavity (34) of the shell (31) through the open part.

8. The reciprocating oil and gas mixing transportation device according to any one of claims 1 to 7, characterized in that: still include heat dissipation base (60), reciprocating pump (10), gas-liquid exchange stabiliser (40) and filter equipment (30) all settle on this heat dissipation base (60), have circulating water cooling system (61) that is used for cooling down to pump body (17) of reciprocating pump (10) on this heat dissipation base (60).

9. The reciprocating oil-gas mixture transfer device according to claim 8, wherein: the circulating water cooling system (61) comprises a circulating water pump (62), a heat exchange tank and a cooling water circulating pipeline (64), wherein the circulating water pump (62) is arranged on the cooling water circulating pipeline (64), and the cooling water circulating pipeline (64) is communicated with the heat exchange tank through a heating cavity of a pump body (17) at the hydraulic end of the reciprocating pump (10).

10. The reciprocating oil-gas mixture transfer device according to claim 9, wherein: the bottom of the heat dissipation base (60) is provided with a heat dissipation plane which can be in contact with an external shelving area in a fitting manner, and the periphery of the heat dissipation base (60) is provided with heat dissipation fins (65).

Images