The Principle and Function of the Sucker Rod Pup Joint

The definition of the sucker rod pup joint

The sucker rod pup joint is an accessory for connecting long sucker rods. It is usually made of high-quality cast steel and cast iron materials, usually seamless steel pipes,and has the characteristics of compact structure, convenient loading and unloading, and high reliability.

The principle of the sucker rod pup joint

The sucker rod pup joint mainly uses metal materials with certain elasticity and ductility to buffer the stress and impact generated by the sucker rod when the oil pump is operating, thereby reducing the burden on the oil pump and ground equipment. The principle of this device is to buffer the stress and impact generated by the sucker rod during the pump stroke by adding a small section of hose between the long rod pump rod, thereby ensuring the normal operation of the oil well and the pumping unit.

During use, the sucker rod pup joint can buffer the stress generated by the oil well, so that the oil pump and ground equipment can still operate normally and durable under harsh environments and conditions. At the same time, the sucker rod pup joint can also adjust the gap between the rod handles by itself under alternating force, so that the movement of the rod handle is more stable, reducing friction and energy consumption.

The role of the sucker rod pup joint

The sucker rod pup joint is a very practical device, which is widely used in the field of oil well drilling and production. Specifically, the role of the sucker rod pup joint is as follows:

1. Improve oil production efficiency

The sucker rod pup joint can effectively transmit power and weight, and improve oil extraction efficiency. It can convert the pump work acting on the wellhead into the force required to lift liquids and debris.

2. Reduce wellbore leakage

The tight connection of the sucker rod pup joint can reduce the risk of wellbore leakage. It can keep the wellhead sealed, prevent oil and gas leakage, and improve oil production efficiency.

3. Protect the sucker rod

The sucker rod is subjected to high-intensity workload and corrosion and is easily damaged. As an accessory, the sucker rod pup joint can play a protective role. It can share the load of the sucker rod and extend the service life of the sucker rod.

4. Buffer stress

The sucker rod short section can buffer the stress and impact generated by the sucker rod during the pump stroke through a metal material with a certain elasticity, thereby reducing the burden on the oil pump and ground equipment and ensuring the normal production of the oil well.

5. Self-adjustment

The sucker rod pup joint can adjust the gap between the rod handles by itself under alternating force, so that the movement of the rod handle is more stable, reducing friction and energy consumption.

6. Extend service life

The sucker rod pup joint can relieve the fatigue stress of the sucker rod during the pump stroke, and can also avoid problems such as bottle jamming and breakage of the sucker rod, thereby extending the service life of the equipment.

Frequently asked questions about sucker rod pup joints

1. What are the connection methods of sucker rod pup joints and long sucker rods?

The connection methods of sucker rod pup joints and long sucker rods include threaded connection and clamp connection. Threaded connection is widely used in oil wells. It has the characteristics of convenient connection, reusability, and fast installation; clamp connection is suitable for the connection of some special wellbores.

2. What issues should be paid attention to when selecting and installing sucker rod pup joints?

The following issues should be paid attention to when selecting and installing sucker rod pup joints: material selection, load capacity, connection method selection, thread fit, sealing performance, etc.

3. How to maintain and service the sucker rod pup joint?

The sucker rod pup joint needs regular maintenance and care, including cleaning, rust removal, and anti-corrosion paint. During use, it is necessary to check for abnormal noise and looseness in time to ensure that the installation is firm.

Conclusion

The sucker rod pup joint is an indispensable accessory in the oil industry. It plays an important role in connecting long sucker rods, transmitting power and bearing weight. It can effectively relieve the stress and impact generated by the sucker rod during the pump stroke, ensure the normal production of the oil well, and extend the service life of the equipment, providing important support and guarantee for oil field development. Reasonable selection and use of the sucker rod pup joint can improve oil production efficiency, reduce wellbore leakage and protect the sucker rod. However, attention should be paid to maintenance during use to ensure its long-term effectiveness.