RU182646U1 - VIBRATION REDUCED PUMP PUMP UNIT - Google Patents

Abstract

The utility model relates to the oil and gas industry, namely to plunger pumping units to maintain reservoir pressure. The technical result achieved by the solution is to reduce the vibration of flow lines during the operation of plunger pumps, which allows for trouble-free operation of the pump unit and increase the reliability of shut-off valves and the pipeline as a whole, as well as the elimination of emergency situations when personnel are damaged by hazardous factors and the exclusion of quick wear of the connection flexible branch pipe to the pipeline and pump unit. The technical result, the proposed pump unit is aimed at achieving, consists in that in a plunger pump unit with vibration suppression comprising a housing, a drive unit fixed inside the housing, a hydraulic unit fixed inside the housing and functionally connected to the drive unit by means of transmitting drive force containing a hydraulic unit with a flexible premium nozzle, a flexible discharge nozzle is installed on the pump outlet, which allows to reduce the vibration of the pipeline on the discharge line pump. Moreover, the hydraulic unit is connected to a flexible discharge pipe by means of a flange connection. In addition, the flexible discharge pipe is enclosed in a protective casing. 2 s.p. f-ly, 1 ill.

Description

The utility model relates to the oil and gas industry, namely to plunger pumping units to maintain reservoir pressure.

Known plunger pump containing a hydraulic unit, a housing with a mechanical drive, consisting of a crank mechanism and crossheads, connected by a rod with a plunger. The rod is made with a latch interacting with a threaded sleeve mechanically connected to the plunger. The inner diameter of the sleeve is selected from the ratio d1≥ (d + 0.2) mm, where d1 is the inner diameter of the sleeve, d is the outer diameter of the rod. Between the plunger and crosshead mounted substrate. The contact surface of the plunger with the substrate is made spherical, (patent RU No. 2203435, IPC F04B 9/00, F04B 53/16, publ. 04/27/2003).

Known plunger pump ultrahigh pressure. The pump is intended for use as a power unit of high-performance hydraulic cutting complexes used in cutting, cutting and manufacturing of parts and assemblies of various configurations. The pump has a housing, a head in which the insert is located, a plunger forming a working chamber in the inner cavity of the insert, suction and discharge valves, the inner cavity of the insert is made stepwise. The smaller stage has a diameter selected from the ratio d1≥ (d + 0.8) mm, where d1 is the diameter of the smaller stage, d is the diameter of the plunger. The large stage has a length selected from the range L≅ (l-5) mm, where L is the length of the larger stage, 1 is the length of the sealing sleeve. The pump ensures that the output fluid pressure reaches 600 MPa, with a flow rate of more than 25 l / min (with a plunger frequency of 5 Hz), a reduction in the unit cost of energy consumed, an increase in the efficiency of the pump, an increase in the service life of wearing parts and components, (RU patent No. 2150026, F04B 53/00, publ. 05.27.2000).

Known plunger pump, consisting of a drive mechanism, a piston, a plunger, a housing, a spring, suction and discharge valves. It is equipped with a roller located in the upper part of the piston between the drive mechanism and the suction valve. The support cup is mounted on the spring and the protrusion of the upper end of the plunger, placed in the housing. Grooves are made on the side surface of the support cup and the suction valve. The plunger is made with a central channel, protrusions that are placed on the ledge of the inner groove of the support cup. The plunger moves relative to the support cup by the amount of clearance between the end face of the plunger and the suction valve. Grooves are made on the contact surfaces of the suction and discharge valves, the diameter of which is 1.1–1.2 of the diameter of the channels, and the depth of 0.5 of the diameter of the plunger channel. The hydraulic resistance at the pump inlet is reduced and the operational reliability is increased, (patent RU No. 2330185, F04B 53/10, publ. July 27, 2008).

These technical solutions do not contain means to reduce vibration, which is a big disadvantage, as this leads to increased wear of the pump. In addition, the design of the presented pumps does not contain means to simplify the connection of the pump unit with the pipeline and protective elements to protect the environment.

The closest in technical essence to the proposed plunger pump and adopted as a prototype is a plunger pump unit for maintaining reservoir pressure, comprising a housing, a drive unit fixed inside the housing, a hydraulic unit also fixed inside the housing and functionally connected to the drive unit by means of transmitting drive force, moreover, the hydraulic unit contains a flexible receiving pipe to suppress vibration from external objects to the input of the pumping unit. The flexible inlet pipe is a corrugated pipe, and moreover, it is connected to the hydraulic unit by

threaded fitting, (patent RU No. 163399, IPC F04B 47/00, published on 07.20.2016).

This pump unit has disadvantages that significantly limit its trouble-free operation:

1. Its design does not contain funds to reduce the vibration of the flow pipe (there is vibration at the outlet of the pump unit), which leads to increased wear of the pump and, as a result, to the destruction of valves and pipeline parts. The absence of a flexible hose on the discharge pipe transfers the vibration of the hydraulic unit of the pump to the discharge pipe, which in turn leads to the destruction of the mounting of the electrically actuated valve and the non-return valve. The discharge pressure of the plunger pump in the event of a leak in the connections of the shut-off valves can lead to emergency situations at the facilities. The most characteristic effects of vibration affect the failure of the pneumatic compensator used on the pressure line of the valve body.

2. During the operation of the known flexible pipe, there are risks of its depressurization and premature failure of the pumping equipment, due to the fact that over time the pipe is deformed, which leads to the outflow of the pumped liquid from the pipeline into the environment. In this case, there are risks of danger of electric shock (as well as other factors) for maintenance personnel.

3. Another significant drawback is that in the known hydraulic drive, a flexible corrugated pipe is connected to pipelines and to the pump unit by means of threaded (articulated) choke joints, which in turn, when pumping aggressive (waste, produced water) liquids, leads to corrosion and attachment of threaded (articulated) fitting connections to the pipeline and pump unit.

The claimed technical solution solves the problem of reducing vibration of flow pipes during the operation of plunger pumps, which allows for trouble-free operation of the pump unit and improves the reliability of shut-off valves and the pipeline as a whole, as well as solves the problem of emergencies when personnel are damaged by hazardous factors and the problem of quick wear of the connection corrugated pipe to the pipeline and pump unit.

The essence of the utility model.

In the process of oil production, the reservoir pressure maintenance system is one of the most energy-intensive areas. More than 30% of all energy costs are the costs associated with pumping water into productive formations in order to maintain reservoir pressure. The centrifugal pumping units used in the reservoir pressure maintenance system (central sectional centrifugal pump), although they provide the necessary mode for pumping process fluid, have relatively high electricity consumption rates. In addition, a significant drawback of centrifugal pumps is the low coefficient of performance (COP) with low productivity. This disadvantage is compounded by individualization conditions (targeted injection of process fluid in small remote areas of oil field development), when, along with low productivity, a high head is required. It should be noted that the central nervous system is a sectional pump with many vanes (wheels), each of which contributes to the overall reduction in efficiency. One of the types of such equipment are plunger pumps (PNA) of volumetric action. A significant advantage of these pumps is the ability to change the frequency of rotation of the electric motor without reducing efficiency and pressure, while maintaining specific energy consumption. Thus, it becomes possible to control injection volumes. The efficiency of volumetric pumps is approximately twice as high as that of centrifugal pumps.

Pumping units receive fluid from the reservoir and pumps it to another reservoir. To realize this purpose, their design contains steel receiving and discharge pipelines connected to the hydraulic unit.

However, the use of volumetric pumps at a cluster pump station (SPS) is complicated by the presence of significant vibrational loads on the receiving and flow lines of the pump unit, which leads to frequent stops and possible equipment failure.

The authors propose to use well-known volumetric pump units containing a flexible corrugated pipe at the pump inlet, the kit of which includes a flexible pipe for the discharge line of the pump connected by flange connections to the pump unit and pipelines, which is also protected by a casing from possible leakage of the flexible pipe. This allows for trouble-free injection of process fluid with low power consumption and eliminates emergency stops associated with vibration.

The technical result to which the proposed pump unit is directed is achieved by the fact that in a plunger pump unit with vibration suppression comprising a housing, a drive unit fixed inside the housing, a hydraulic unit fixed inside the housing and operably connected to the drive unit by means of transmitting drive force, containing a hydraulic unit with a flexible premium nozzle, a flexible discharge nozzle is installed on the pump outlet, which reduces vibration of the pipeline on the discharge line Asosa. Another distinctive feature of the known pumping units is that the hydraulic unit is connected to the flexible discharge pipe by means of a flange connection, the flexible discharge pipe being enclosed in a protective casing, ensuring trouble-free operation of the pumping unit and the safety of maintenance personnel.

An analysis of the known technical solutions carried out according to scientific, technical and patent documentation showed that the set of essential features of the claimed technical solution is not known from the prior art, therefore, it meets the patentability condition of the utility model - “novelty” and “industrial applicability”.

One skilled in the art knows that vibration is transmitted through rigid elements and is eliminated, or greatly attenuated, when transmitted through flexible elements. It is obvious that in the case of plunger pumping units, it is advisable to increase the flexibility of the element connecting the pumping unit to external devices or systems: inlet and outlet pipe.

Plunger pumps are widely known in the art and usually consist of a housing in which a drive unit is mounted (an engine or other drive with appropriate means of transmitting movement (driving force) to the hydraulic unit), a hydraulic unit containing one or more reciprocating plungers movement in the chamber (s), appropriate means of receiving movement from the drive unit, chamber (s), suction and pressure valves, providing inlet and outlet of the pumped liquid into and out of the chamber. Means of transmission of motion can be, for example, a crankshaft and a connecting rod, which transmit a reciprocating motion to the plunger, whose movement in turn leads to pumping fluid. Also, a suction and pressure pipes (pipelines) are connected to the hydraulic unit.

Plunger pumps are single acting, positive displacement pumps and are self-priming. Pump delivery is directly dependent on the diameter of the plunger, its stroke length and crank speed. A reduction in flow is affected by a delay in the fit of the pressure and suction valves, as well as leaks through the valves and seals.

Typically, the plunger of the pump unit is in the chamber and performs a reciprocating motion. When the plunger moves in one direction, the pressure in the chamber containing the liquid decreases and becomes lower than the pressure of the liquid in the suction pipe. Under the influence of the pressure difference, the suction valve opens and the liquid fills the working chamber located in the pump unit housing. When the plunger moves in the opposite direction, the pressure in the chamber increases and becomes higher than the pressure in the discharge pipe. The discharge valve opens and fluid is displaced from the chamber into the pressure pipe.

To ensure efficient operation, the plunger must have sufficient wear resistance, while the tightness is achieved by high precision manufacturing and stringent requirements for surface roughness.

To eliminate the uneven flow - a specific drawback of plunger drive pumps - there are a number of design methods.

One of them is the installation of air caps on the pressure and suction lines, providing a more uniform flow.

Another way to reduce feed irregularities is to use multi-piston pumps with parallel connection of chambers.

Plunger pumps are widely used as a displacing element of the working chamber.

Plunger pumps are easier to operate because they have less wear parts (in the hydraulic part there are no piston rings, cuffs and other parts).

According to the method of connecting the pump to the engine, the pumps are distinguished by transmitting movement through a V-block gear, through a gearbox, directly through a coupling.

According to the material of the parts of the flowing part, pumps are distinguished without cooling or heating the hydraulic part, without a water seal, with the supply of lubricating fluid to the seals (for pumping fluid from -15 to + 100 ° C), without cooling or heating of the hydraulic part, with the supply of cooling, flushing or hydraulic lock fluid to the seals (for pumping liquids from - 15 to + 100 ° С), a pump with cooling or heating of the hydraulic part, with the supply of cooling flushing or hydraulic lock fluid to the seals (for pumping liquid temperatures from - 50 to + 250 ° С).

All of the above technical means can be introduced into the design of the proposed pump unit and, moreover, most of them are contained in its design, however, the claims are compiled as a whole so as to simplify the understanding of the essence of the proposed technical solution, therefore, the nodes and the blocks are not indicated in the formula, although it is clear to a specialist in the field of technology that the claimed pump unit contains all the nodes necessary for its operation, and I am communicating between these nodes Xia standard, unless otherwise indicated.

In this utility model, it is proposed to use a flexible pipe on the flow line of the pump to eliminate or significantly reduce vibration acting on the pump unit through the liquid discharge line, as well as to reduce the transmission of vibration from the pump to external devices and systems.

The claimed plunger pumping unit for maintaining reservoir pressure comprises a housing, which is a housing commonly used in the art, typically made of metal. The drive unit of the claimed unit fixed inside the housing is a drive unit commonly used in the art, for example, an electric motor with power and other parameters suitable for the operation of the pump unit. A hydraulic unit fixed inside the housing is a hydraulic unit commonly used in the art comprising plunger (s), chamber (s), valves, nozzles, and other standard elements necessary for the operation of the hydraulic unit, a list of which is known to those skilled in the art. The hydraulic unit is operatively connected to the drive unit by means of transmitting drive force. Functional communication means communication providing the transmission of drive force from, in particular, the electric motor to the hydraulic unit to ensure fluid transfer. In one embodiment, this connection is provided by one or more crankshafts and connecting rods, although another drive transmission design known in the art can be used, including gear, pulley, belt, belt and pulley gears, etc. It is obvious that the pump unit receives fluid from the tank and pumps it to another tank and for this purpose, its design contains receiving and discharge steel pipes connected to the hydraulic unit.

In the prior art solution for eliminating vibration transmission, the receiving pipe is flexible, which is connected by a threaded (articulated) connection to the pump casing.

In the proposed solution, in order to eliminate the transmission of vibration from the pump casing to flow lines, a flexible pipe is connected to the pump casing, and it is connected by means of flange connections, which, in turn, eliminates sticking and wear of the connections, respectively, which will generally simplify the operation of the pump unit. In addition, the flexible pipe is enclosed in a protective casing to prevent the occurrence of hazardous factors for equipment and maintenance personnel, such as spilling liquid from the discharge pipe into the environment.

Flexible inlet and outlet nozzles provide the possibility of turns, displacements, twisting, etc. in a very wide range, which greatly increases the usability of the pump unit.

The embodiments are not limited to the embodiments described herein, but other embodiments of the utility model that do not go beyond the essence and scope of this utility model will become apparent to those skilled in the art based on the information set forth in the description and knowledge of the prior art.

The inventive utility model is illustrated in the figure "Plunger pump unit with vibration suppression." Accepted designations: 1 - pump frame, 2 - electric motor, 3 - elastic couplings connecting the electric motor to the gearbox and pump, 4 - gearbox, 5 - mechanical unit, 6 - hydraulic unit, 7 - flexible receiving pipe, 8-flange flexible connection pipe, 9 - flexible discharge pipe, 10 - protective casing of the flexible discharge pipe.

The plunger pump unit with vibration reduction, contains a frame 1, an electric motor 2, connecting couplings 3, a gearbox 4, a mechanical unit 5, a hydraulic unit 6 with a flexible receiving pipe 7, mounted on the frame 1, At the output of the pump of the hydraulic unit 6 a flexible discharge pipe 9 is installed , allowing to reduce vibration of the pipeline on the discharge line of the pump. The hydraulic unit 6 is connected to the flexible discharge pipe 9 by means of a flange connection 8, and the flexible discharge pipe 9 is enclosed in a protective casing 10.

The plunger pump unit, mounted on the frame 1, is driven by an electric motor 2, the rotation of the electric motor through the elastic couplings 3 and the gearbox 4 mounted on the frame 1 is transmitted to the mechanical unit 5 and the hydraulic unit 6, which draws water from the flexible inlet pipe 7 from pipeline and pumps liquid through a flexible discharge pipe 9, fixed to the pump and the pipe by flange connections 8 to a pipeline system connected to injection wells, moreover, a flexible discharge pipe 9 protects casing 10.

The inventive plunger pump unit with vibration suppression can be manufactured on standard equipment using modern materials and technologies, has technical applications at the facilities of the reservoir pressure maintenance system of the Elkhovneft Oil and Gas Production Company named after PJSC Tatneft named after V.D. Shashina. Using the proposed device allows to reduce the vibration of flow pipes during the operation of plunger pumps, as well as to ensure trouble-free operation of the pump unit and increase the reliability of shut-off valves and the pipeline as a whole. The risks of emergencies when personnel are injured by hazardous factors are reduced and the likelihood of wear of the connection of the flexible discharge nozzle to the pipeline and pump unit is reduced.

This plunger pump unit with vibration suppression has technical application in NGDU “Elkhovneft”.

Claims (3)

1. A plunger pump unit with vibration reduction, comprising a housing, a drive unit fixed inside the housing, a hydraulic unit mounted inside the housing and operably connected to the drive unit by means of transmission of driving force, comprising a hydraulic unit with a flexible receiving branch pipe, characterized in that a flexible discharge pipe is installed on the pump, which allows to reduce the vibration of the pipeline on the discharge line of the pump. 2. A plunger pump unit with vibration suppression according to claim 1, wherein the hydraulic unit is connected to a flexible discharge pipe by means of a flange connection. 3. The plunger pump unit with vibration suppression according to claim 1, wherein the flexible discharge pipe is enclosed in a protective casing.

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