Table of Contents:
This article will provide a comprehensive understanding of the definition of an insert rod pump, a comparison between an insert rod pump and a progressive cavity pump, its classification, the impact of different pump hole sizes, and how to install a pump. By leveraging our company's strengths in this field, we'll help you quickly make a selection decision.
What is an insert rod pump?
An insert rod pump is a piece of equipment used in heavy oil production. An insert rod pump consists of two parts: a seal support joint that connects to the oil pipe, and the pump body. The entire insert rod pump is secured and sealed within the oil pipe along with the sucker rod.
Which is better, insert rod pump or screw pump?
| Comparison Items | Insert Rod Pump | Progressive Cavity Pump |
| Working Principle | The reciprocating motion of the sucker rod drives the plunger, which cooperates with the pump barrel seal to lift the well fluid to the surface in stages. | The rotor rotates within the stator, continuously pumping well fluid to the surface through the spiral cavity. |
| Applicable Well Conditions | Applicable to high-sand, high-viscosity crude oil wells, as well as conventional heavy oil wells. | Suitable for heavy oil wells with low to medium sand content and low gas content, as well as wells with relatively stable well fluid properties. |
| Wear Resistance | A wear-resistant structure is available to accommodate high-sand and abrasive environments. | Long service life in low-sand environments, but requires enhanced protection when sand content is high. |
| Maintenance Methods | Pump replacement or maintenance can be completed by simply lifting and lowering the sucker rod, without tripping or lowering the tubing. | Tubing often needs to be pulled in and out for replacement or maintenance, resulting in a long downhole maintenance cycle. |
| Operation Efficiency | Pump inspections are quick, reducing well downtime. | Long operating cycles reduce maintenance frequency, making it suitable for long-term, stable production. |
| Cost | Initial investment is relatively low, and maintenance costs vary depending on operating conditions. | While the initial investment is relatively high, suitable well conditions can extend the operating cycle and reduce unit oil production costs. |
| Operational Characteristics | The pump offers stable performance in high-sand wells and is suitable for wells with frequent maintenance. | Smooth delivery and low shear forces are suitable for reducing crude oil emulsification and minimizing flow rate fluctuations. |
What other types of insert rod pumps are there?
Our company's oil well pumps utilize API design standards. We offer three models of insert rod pumps, ranging in size from φ28 to φ57, covering the full range of insert rod pump specifications. Insert rod pumps eliminate the need to raise and lower tubing during the pumping process, making operation simple, time-saving, and labor-intensive, while minimizing well time. Insert rod pumps can reduce operating time by more than half, thereby reducing operating costs. Currently, our company's insert rod pumps are widely used in domestic oilfields.
What impact does the size of an insert rod pump hole have?
Generally speaking, larger pump holes discharge more fluid per plunger stroke, making them particularly suitable for high-yield wells. Smaller pump holes are better suited for low-yield wells or those with smaller well diameters.
Small pump holes (φ28-φ38) are more suitable for wells with small diameters, limited casing space, deep liquid levels, or low-yield heavy oil wells.
Large pump holes (φ44-φ57) are typically used in high-yield wells, especially those with high water cuts or moderate viscosity.
How to lower the insert rod pump? When lowering the pump:
(1) Lower the tail pipe, screen pipe, screw plug, etc. of the required length according to the design of the operation manual.
(2) Connect the sealing support joint of the rod pump, including the blowout preventer assembly.
(3) Lower the sealing support joint of the pump (pay attention to the direction) along the oil pipe to the designed depth.
(4) Lower the corresponding number of oil pipes according to the pump hanging depth to seal the wellhead.
(5) Lift the rod pump and lower the pump along with the sucker rod to the pump hanging depth. Slow down the descending speed when approaching the sealing support joint. When the rod stops moving downward, mark the rod. The sum of the rod length and the pump length should match the design depth.
(6) Lift the rod upward to about 3 meters, lower the pump, and seal the pump seat in the sealing support joint.
(7) Calculate the anti-surge distance and short section length based on the pump hanging depth, stroke, pump length, rod string, etc.
(8) Raise the last two rods, lower the short section, replace the rod, and install the blowout prevention box.
(9) Lift the rod upward to about 2-3 meters, quickly lower the rod string to hit the pump, and repeat 1. ~ 2 times to ensure that the pump seat is sealed in the sealing support joint;
(10) Adjust the anti-surge distance, connect the square clip, and hang the pump.
(11) Start pumping and hold the pressure according to the operating instructions, and check the pump efficiency.
(12) When checking the pump in the well, lift the sucker rod, lift the rod pump to 20-30mm, stop lifting the sucker rod, let the oil in the oil pipe flow to the bottom of the well, then lift the sucker rod and pull the pump out of the wellhead.
FAQ:
Q1: Is the insert rod pump suitable for high sand content wells?
A: Yes, thanks to the wear-resistant material and sand-proof design, it can cope with high sand content conditions.
Q2: How long does it take to replace the pump?
A: It can usually be completed within a few hours, saving about 50% time compared to conventional pumps.
Q3: How long is the service life of the pump?
A: Under normal working conditions, it can reach 3-4 years, depending on the well conditions and maintenance.
What is the process for purchasing Dongsheng products?
You can contact us by email, phone, or online, providing the rod pump model, specifications, quantity, and well conditions you require.
Our team will develop a product proposal based on your needs and provide a quote.
After you confirm the proposal, you will sign a purchase and sales contract, specifying specific terms such as price, payment method, and shipping method.
Processing and manufacturing will be carried out in accordance with the contract requirements, ensuring product quality meets API standards.
After production is completed, we will conduct rigorous inspections. Once qualified, we will arrange shipping and provide relevant documents such as bills of lading, packing lists, and commercial invoices.
After receiving the product, if you have any questions, please feel free to contact us. We will respond promptly and provide solutions to protect your rights.
If you are interested in purchasing our products, send me an email now to receive free selection advice and quotes, saving you time, worry, and money on oil well production.