CN-121576270-B - High gas multiphase pump conveying system in oil field

Abstract

The invention relates to the technical field of multiphase pump conveying in oil fields, and discloses a high-gas-content multiphase pump conveying system in oil fields, which comprises an inlet pipeline, a pump unit, a pump tank pipeline, a middle tank, an outlet pipeline, an electric control ball valve, a one-way pipeline, a shell and a gas-liquid pretreatment structure, wherein after entering through the inlet pipeline through a gas-liquid mixing medium, the gas-liquid pretreatment structure is used for completing preliminary gas-liquid separation, micro-bubble crushing and pressure fluctuation buffering, and then entering the pump unit for pressurization, the medium after the pressurization gets into the intermediate tank through pump jar pipeline and accomplishes secondary gas-liquid separation, and liquid after the separation is exported through the export pipeline, when detecting that the gas content is too high, automatically controlled ball valve opens and realizes the intermediate tank fluid replacement, avoids the pump idle running, and when detecting instantaneous high pressure, one-way pipeline linkage pressure release prevents pump unit damage, has solved current multiphase pump and has easily idled under the high gas content operating mode, fragile technical problem under the high pressure operating mode, has promoted system operation stability and equipment life.

Inventors

• LI NI
• LIU GUOHUI

Assignees

• 大连宝冶节能环保科技有限公司

Dates

Publication Date

20260508

Application Date

20260123

Claims (6)

1. 1. The utility model provides an oil field high gas multiphase pump conveying system, its characterized in that includes the entry pipeline, connects the casing in entry pipeline one side, one side of casing is connected with the pump unit, one side of pump unit is connected with pump tank pipeline, one side of pump tank pipeline is connected with the intermediate tank, the intermediate tank is used for the gas-liquid separation, one side of intermediate tank is connected with the jar entry, and the jar entry is connected with pump tank pipeline, the opposite side of intermediate tank is connected with the liquid export, the one end of liquid export is connected with automatically controlled ball valve, automatically controlled ball valve is connected with the entry pipeline, the top of intermediate tank is connected with the jar export, the one end of jar export is connected with the outlet pipeline, the one end of outlet pipeline is connected with the unidirectional pipeline, the unidirectional pipeline is connected with the entry pipeline, the inside of casing is provided with gas-liquid pretreatment structure, and gas-liquid pretreatment structure is including setting up the water conservancy diversion subassembly in the inside the casing, the inside of drum shell is provided with helical blade, one side of water conservancy diversion subassembly is provided with broken bubble subassembly, broken bubble subassembly including setting up rectangular housing, the inside the casing is provided with the belleville spring assembly, the piston assembly is provided with the inside the piston assembly is provided with in the inside the piston assembly, one side of the piston assembly is provided with the piston assembly is connected with; The outer side of the cylinder shell is provided with a first flange, one side of the first flange is provided with a bolt, and one side of the cylinder shell is provided with a filter screen; one end of the bolt is provided with a second flange, the inner side of the second flange is provided with a round shell, the inner side of the round shell is provided with a sliding groove, the inside of the sliding groove is connected with a sliding block in a sliding manner, one side of the sliding block is provided with a connecting plate, the connecting plate is connected with screen plates, four groups of screen plates are distributed at equal intervals, and elastic films are arranged between two adjacent groups of screen plates; The inside of the shell is provided with a bearing plate, the bearing plate is connected with the rectangular shell, the adjusting component comprises a driving component arranged inside the rectangular shell, the adjusting component comprises a push plate which is in sliding connection inside the shell, the push plate drives the sieve plate to vibrate so as to break bubbles, the driving component comprises a bidirectional motor arranged inside the rectangular shell, two sides of the bidirectional motor are provided with bevel gear sets, one side of each bevel gear set is provided with a rotary disc, and the surface of each rotary disc is provided with a round block; the inside of casing is provided with the cover shell, push pedal and cover shell sliding connection, one side of push pedal is provided with hollow slab, hollow slab and circle piece sliding connection.
2. 2. The oilfield high-gas-content multiphase pump conveying system according to claim 1, wherein the inlet pipeline comprises an inlet pipe connected to one side of the shell, a bifurcation pipe is connected to one side of the inlet pipe, the bifurcation pipe is connected with the electric control ball valve, one end of the inlet pipe is connected with a biphase flow transmitter, and one side of the biphase flow transmitter is connected with an inlet tee joint.
3. 3. The oilfield high-gas-content multiphase pump conveying system according to claim 2, wherein one side of the inlet tee joint is connected with a second check valve, one side of the second check valve is connected with a pipeline, and one side of the pipeline is connected with a second gate valve.
4. 4. The oilfield high-gas-content multiphase pump conveying system according to claim 3, wherein one side of the second gate valve is connected with an outlet tee joint, one side of the outlet tee joint is connected with a first gate valve, one side of the first gate valve is connected with a second check valve, one side of the second check valve is connected with a second outlet pipe, and the second outlet pipe is connected with a tank outlet.
5. 5. The oilfield high-gas multiphase pump conveying system according to claim 1, wherein a base is arranged on one side of the intermediate tank, a driver is arranged at the top end of the base, a pump head is arranged on an output shaft of the driver, an inlet pipe is connected to one side of the pump head, the inlet pipe is connected with the shell, an outlet pipe I is connected to the other side of the inlet pipe, and the outlet pipe I is connected with a pump tank pipeline.
6. 6. The oilfield high-gas-content multiphase pump conveying system according to claim 1, wherein an outlet cylinder is arranged in the shell and connected with the piston, a bottom plate is arranged on one side of the belleville spring, and the bottom plate is connected with the tension spring.

Description

High gas multiphase pump conveying system in oil field Technical Field The invention relates to the technical field of oilfield multiphase pump conveying, in particular to an oilfield high-gas multiphase pump conveying system. Background Along with the expansion of oil and gas resources to deep sea and unconventional reservoirs, the traditional conveying mode has limited efficiency, and the double-screw multiphase pump becomes important equipment of an oil and gas gathering and conveying system due to the capability of the double-screw multiphase pump for efficiently conveying gas and liquid mixtures. Shale gas and offshore oilfield development promote the demand of high-performance multiphase pumps, the popularization of oil gas production is also assisted in market growth, and the mixed transportation of gas and liquid with high gas content is required for more and more working conditions, so that the problem of transportation of multiphase pumps is solved. In view of the above and related technologies, the inventor considers that the following defects often exist that in the operation and use process of the high-gas-content multiphase pump conveying system of the oil field, at present, for a double-screw multiphase pump, when gas-liquid mixed conveying is carried out and gas content is not high, as a spiral groove in the pump is always filled with part of liquid, the self-priming function of the double-screw pump is utilized, the pump can generally run without faults; The existing multiphase pump mostly adopts single-unit operation, the pipeline is directly led out from the inlet and the outlet of the pump, the whole structure is simple, the production efficiency is low, and the pump body part is extremely easy to damage when the inlet of the pump has instant high-pressure impact, the equipment failure rate is obviously improved, and the operation and maintenance cost and the production interruption risk are increased. Disclosure of Invention The invention aims to solve the technical problem that the high-gas-content multiphase pump conveying system of the oil field in the prior art has the defects, and therefore, the high-gas-content multiphase pump conveying system of the oil field is provided. In order to achieve the above purpose, the technical scheme is that the oil field high-gas-content multiphase pump conveying system comprises an inlet pipeline and a shell connected to one side of the inlet pipeline, one side of the shell is connected with a pump unit, one side of the pump unit is connected with a pump tank pipeline, one side of the pump tank pipeline is connected with a middle tank, the middle tank is used for gas-liquid separation, one side of the middle tank is connected with a tank inlet, the tank inlet is connected with the pump tank pipeline, the other side of the middle tank is connected with a liquid outlet, one end of the liquid outlet is connected with an electric control ball valve, the electric control ball valve is connected with the inlet pipeline, the top end of the middle tank is connected with a tank outlet, one end of the tank outlet is connected with an outlet pipeline, one end of the outlet pipeline is connected with a one-way pipeline, the inside of the shell is provided with a gas-liquid pretreatment structure, the gas-liquid pretreatment structure comprises a guide component arranged inside the shell, the middle tank is used for gas-liquid separation, one side of the middle tank is connected with a tank inlet, the tank inlet is connected with the liquid-inlet pipeline, the other side of the middle tank is connected with a liquid pump tank, the buffer component is connected with a buffer component, one side of the buffer component is movably arranged inside the shell, the buffer component is arranged, one side of the buffer component is arranged in the shell through the rectangular buffer component, and the buffer component is arranged. Preferably, the inlet pipeline comprises an inlet pipe connected to one side of the shell, one side of the inlet pipe is connected with a bifurcation pipe, the bifurcation pipe is connected with the electric control ball valve, one end of the inlet pipe is connected with a dual-phase flow transmitter, and one side of the dual-phase flow transmitter is connected with an inlet tee joint. Preferably, one side of the inlet tee is connected with a second check valve, one side of the second check valve is connected with a pipeline, and one side of the pipeline is connected with a second gate valve. Preferably, one side of the second gate valve is connected with an outlet tee joint, one side of the outlet tee joint is connected with a first gate valve, one side of the first gate valve is connected with a second check valve, one side of the second check valve is connected with an outlet pipe II, and the outlet pipe II is connected with the outlet of the tank. Preferably, one side of the middle tank is provided with a base, the top end of the base is