1. Introduction to hydraulic jet pump system:
The hydraulic jet pump drainage process has a history of more than 40 years of research, development, and application in China, and has now become a mature drainage process. From process matching to product series research, it has reached a high level.
The entire system consists of two parts: underground equipment and surface equipment:
The downhole equipment includes: hydraulic pump downhole unit, packer (single pipe string), tubing and wellhead equipment;
Ground equipment includes: high-pressure pump units, power fluid treatment tanks, measuring instruments, high and low pressure filters, high and low pressure ground process pipelines and valves, etc.
2. Hydraulic jet pump system - working principle
When high-pressure fluid (power fluid) passes through a small-sized reduced diameter end face (nozzle), its velocity can significantly increase, and the pressure energy at the outlet position can significantly decrease, thus forming a relatively "negative pressure" zone around the end face, generating suction effect. The formation fluid and power fluid mix through the throat, and then diffuse through the diffusion tube, gradually recovering a certain amount of pressure energy. This pressure energy completes the transportation or lifting of the mixed fluid.
3. Hydraulic jet pump system - workflow
4. Hydraulic jet pump system - Process structure form and working principle
Process structure form inside the wellbore
5. Hydraulic jet pump system - in use
Combining with the actual situation on site, conduct new research and development
| Single tube column normal circulation ordinary type | The pump core is of the input type, with hydraulic lifting and lowering. During operation, high-pressure liquid is injected into the oil pipe and discharged from the annular space of the oil casing |
Single tube column positive cycle coupling type | The pump core can be lifted and lowered by hydraulic force, and can achieve hydraulic fracturing, oil production or drainage gas production, pressure testing, etc |
Single tube column fixed reverse circulation type | The pump barrel and pump core are fixedly installed as a whole, and are inserted into the predetermined position along with the pipe column, and then sealed with a packer for drainage |
Single tube hydraulic reverse circulation type | The pump core is inserted into the pump barrel from the oil pipe, injected into the casing during operation, discharged from the oil pipe, and the hydraulic force of the pump core is extracted |
Double column positive circulation ordinary type | First, insert the larger oil pipe connected to the pump barrel into the wellbore, and then insert the smaller oil pipe. The pump core is of the input type, with hydraulic lifting and lowering |
Dual column positive circulation injection production integrated type | After the homework is inserted into the pipe column, it is possible to achieve non lifting of the pipe column and reduce viscosity by injecting steam around the circumference for mining |
6. Hydraulic jet pump system - specifications, models and process characteristics
Process characteristics:
Hydraulic jet pump has a compact structure, no moving parts, high operational reliability, and long service life;
Without sucker rods, it has strong adaptability to high angle wells and eccentric wear wells;
The hydraulic lifting and parameter adjustment of the pump core are convenient;
The main components are made of wear-resistant materials, which have strong adaptability to sand wells;
By increasing the flow rate of the mixed fluid, sand carrying oil production can be achieved;
Not sensitive to gases, suitable for production in high content gas wells and drainage gas wells;
The heating treatment of power fluid can be applied to the production of heavy oil, high pour point oil, and high wax wells.
The process structure is flexible, and according to the on-site application situation, it can achieve multi-purpose joint operation function, reduce costs, and increase the production efficiency of oil and gas wells.
External dimensions of pump working cylinder mm
| Ф84-Ф114×1718 | Dimensions of sunken pump ，mm | Ф37-Ф59 ×(760-1246) |
Quality of pump working cylinder，kg | 48.9 | Submerged pump quality，kg | 28.3 |
Adapt to the inner diameter of the tubing，mm | Ф40/Φ62/Ф76 | nozzle diameter，mm | 1.6～ 4.8 |
Applicable oil pipe specifications | 1.9in/27/8in/3½in | Throat diameter，mm | 2.6～ 11.5 |
Theoretical displacement，m3/d | 0～300 | Maximum head，m | Determine based on ground dynamics |
Minimum pass of work cylindermm | Ф50 | heat-resistant，℃ | ≤300 ℃ |
Column structure and installation form |
Single tube column/concentric tube column flush-mounted installation
| Power fluid type | Reinjection of sewage and dilute oil |
Power fluid temperature | ≥40 ℃ |
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7. Hydraulic jet pump system - patented product
patented product
hydraulic jet pump
Patent number: 200720023057.
Multi functional collaboration process and device of jet pump unit
Patent number: ZL200910020113.7.
Plug in hydraulic jet pump unit
Patent number: ZL201220525924.
8. Hydraulic Jet Pump System - Application Cases
Application Cases (Selected)
(1) The concentric column hydraulic jet pump is applied in the Gu7-33P234 well for sand carrying oil production. The pump unit enters the horizontal section 150 meters and the tail is upturned, and the pump core is normally lifted and lowered. Used for sand carrying mining in well M14-36-X15.
(2) The integrated process of hydraulic jet pump injection and production is used for heavy oil extraction in the GuXTK701-X59 well.
(3) The concentric column hydraulic jet pump is used in three wells, BQ15E, BQ15-D1, and BQ15-D2, which are drainage and gas production wells operated by Grek Company in Guizhou. In April May 2017, the SPB2.5 × 1.5 × 2 concentric jet pump developed by Shengli Oilfield Shengli Pump Industry Company was put into production. Adopting a one to three approach: one ground pump drives three wells to work. Ground pump parameters: 45KW variable frequency motor, theoretical displacement of 15m ³/h, rated pressure of 10MPa. In recent years, our company's jet pump technology has been well applied in drainage gas wells in Guizhou coalbed methane wells
(4) The concentric column hydraulic jet pump is applied in the Tianxing 1-1HF well of coalbed methane in Guizhou.
(5) Hydraulic jet pump, applied at the Longye 3 shale gas well site
(6) The single tube hydraulic jet pump is used in Well Bai22-32 of Dagang Oilfield Oil Production Plant. The crude oil viscosity (50 ℃) is 171300mPa · s, and the oil reservoir is buried at a depth of 3660m. Other oil production processes cannot guarantee normal production. Since October 1996, we have been using our company's hydraulic jet pump for mining, with a liquid production of 16.3m ³/d and an oil production of 6m ³/d. The equipment is operating normally, and the operation cycle is over 5 years. This process has been highly recognized by Party A.
