In view of the high cost and labor intensity of manual injection for foam drainage gas production in gas wells, our company has developed an automatic stick/ball throwing device and an automatic agent injection device, and conducted relevant product experiments and research.

The automatic throwing device mainly consists of a shell, an electromagnetic head, a turntable, a rod storage cylinder, etc. The throwing process is safe and reliable. The automatic injection device mainly consists of solar panels, batteries, inverters, plunger pumps, medication tanks, and remote controllers. It works in conjunction with a digital remote control system and sends instructions through station control software to achieve remote control and automatic quantitative injection of foaming agents.

1. The automatic filling device for the wellhead foam ball has a compact structure, small volume, and light weight.

2. Device high and low pressure separation: Through the design of the ball throwing piston mechanism, the storage cylinder (atmospheric pressure zone) is separated from the ball throwing main valve (high-pressure zone), improving safety and convenience of ball storage.

3. The control method of the automatic volleyball throwing device adopts a combination of timed control and remote control.

4. Low energy consumption: The total power of the device is less than 350W.

5. Adopting a double sealed structure, it is safe and reliable.

6. Able to achieve on-site adjustment.

7. Able to achieve motor overload protection.

8. The shooting of volleyball is precise and flexible.

9. During the work process, there is no need to empty or pollute the environment.

The on-site application of 86 wells shows that the equipment has stable performance and high degree of automation, with a cumulative increase in gas production of 8.1 million square meters and an annual savings of 2.1 million yuan (USD 336000) in production and operation costs. The application of this technology has improved the efficiency of foam drainage gas production and provided technical support for the popularization and application of foam drainage gas production.

Nominal pressure: 25MPa——Working voltage: DC 12V

Power supply method: solar panel power supply——Rated power: 260W for large motor and 75W for small motor

Work pressure: 16MPa——Volleyball specifications: Φ38mm ~Φ48mm

Ball storage/rod storage capacity: 1000mm long, can hold 300 balls of 50 each——Working time: 3.5 minutes (2 minutes for large motors and 1 minute for small motors, with a delay of 0.5 minutes during the process)

Pitching cycle: 1-9999 hours adjustable——Number of pitches per cycle: 1-99 adjustable (with a 1-minute interval between each pitch)

Number of pitches per shot: 2——Total height: ball storage tube/rod storage warehouse 1000mm, length and height 1.7m