Vacuum Degasser: Key Secondary Purification Equipment for Drilling Fluid

 

As a key secondary purification equipment in the drilling solid control system, the vacuum degasser is indispensable for high-risk working conditions such as deep wells and gas wells, ensuring drilling safety and improving mud quality.

Definition & Core Functions

Installed after the shale shaker, the vacuum degasser is designed to remove micro-bubbles (≤3 mm) in drilling fluid (while liquid-gas separators handle bubbles ≥3 mm). Its core functions are:

Remove micro-bubbles to ensure stable operation of subsequent solid control equipment. 

Reduce concentrations of toxic gases (e.g., methane, hydrogen sulfide) to enhance on-site safety 

Adopt a liquid ring vacuum pump for negative pressure mud suction, no additional mud supply pump needed

Main Structure Types

1.APZCQ Integrated Standard Type (Best-selling). 

Features: High efficiency, stability, no transfer pump required, mature and reliable. Main components: Tank body, internal impeller, motor, belt, vacuum gauge, electric control system, water-gas separator, base and full set of pipelines.

2. APLCQ Vertical Compact Type

Features: Small footprint, compact structure, similar to SWACO, popular among overseas customers (Middle East, Russia). Configuration: Equipped with reducer and small blower. Main components: Main mud inlet pipe, bottom screen, impeller, small vacuum pump, regulating valve, etc.

3. Derrick Jet Type

Features: Energy-saving jet mode. Disadvantages: Requires Venturi tube and small air compressor, some parts rely on imports, high procurement cost.

Suggestion: Prioritize APZCQ and APLCQ models for sales.

 Common Wear Parts

 Low maintenance cost with few wear parts: Vacuum pump, drive belt, ball valves, reducer bearings, oil seals.

Working Principle & Operation

Pre-start: Ensure sufficient water in water-gas separator and vacuum pump; install a 1.5m connecting pipe for mud inlet (insert below mud surface). Operation: Vacuum pump starts automatically within 10–20 seconds after power-on; mud is sucked into the tank by negative pressure; impeller rotates at high speed to break bubbles by centrifugal force; gas is purified by water-gas separator and discharged.

Advantages of AIPU Vacuum Degasser

Reliable raw materials: International standard steel from Baosteel, Angang 

High-quality components: Motors from well-known domestic brands 

Strict production process: Compliance with industry standards, strict welding and inspection

Low maintenance cost, easy operation (one-key start) 

Customizable: Motor, electrical system, certification, appearance color, etc.

On-Site Application Tips

Mandatory for deep wells (≥3000m) and gas wells; recommended for use at the start of drilling. For vertical APLCQ: Design submerged depth reasonably; optional centralizer; mud outlet should be 500–700mm above liquid level.

Summary

The vacuum degasser is a crucial guarantee for drilling safety and mud purification, mainly removing micro-bubbles ≤3 mm. APZCQ (mature and stable) and APLCQ (popular overseas) are the preferred models, with the advantages of simple structure, low maintenance and customization support.




 Emial: Ivy@aipusolidcontrol.com

Website: www.aipusolidcontrol.com

 

评论

发表评论

此博客中的热门博文

Shale Shaker Is The Key Equipment in the Drilling Solids Control System

图片
The shale shaker is the  first and most critical piece of equipment  in the drilling solids control system. Its performance directly affects the efficiency of downstream equipment such as desanders, desilters, and decanter centrifuges. A properly selected shale shaker can significantly reduce drilling costs, improve drilling fluid quality, and enhance overall operational efficiency. What Is a Shale Shaker? A shale shaker separates large drill cuttings from drilling fluid through  high-frequency vibration combined with precision screen filtration . Clean drilling fluid is recovered and reused in the circulation system, while solid cuttings are discharged, achieving primary solids control at the earliest stage of drilling operations. Key Functions of a Shale Shaker 1. Early Removal of Large Solids . Removes up to 70% or more of drilled solids before they reach downstream equipment. 2. Protection of Downstream Equipment . Reduces wear on hydrocyclones and centrifuges, exte...
阅读全文

The Application of Mud Gas Separator in Solids Control System

图片
The g as-handling equipment plays a n important role   in the solid control system.Generally speaking, The   vacuum degasser removes small bubbles, while the mud gas separator (MGS, also known as Poor Boy Degasser or Liquid-Gas Separator) is used  to handle big  bubbles. Big bubbles have strong expansion in the wellbore. If do not handle in time, they may cause a well kick   with  a serious threat to drilling safety. Therefore the mud gas separator is used as  a safety device during drilling operations. It is usually used together with the flare ignition .The flare ignition can deal with  the harmful gas which is separated from the mud, thereby it can reduc e  both environmental and safety risks. Installation site of the mud gas separator The mud gas separator is generally installed on   flat ground beside the mud tank, fixed with bolts. The mud inlet is connected to the choke manifold and controlled by a valve to ensure smooth and effi...
阅读全文

How Does a Shale Shaker Improve Overall Operational Efficiency at the Drilling Site?

图片
At drilling sites, time and efficiency often directly determine project costs. As the front-end equipment of the solids control system, the   shale shaker  is not only responsible for solid–liquid separation, but also plays a critical role in the continuity and stability of the entire drilling operation. Common Challenges at Drilling Sites 1.High sand content in drilling fluid, resulting in poor circulation performance. 2.Frequent screen clogging or damage, causing downtime for replacement. 3.Excessive load on downstream solids control equipment, increasing maintenance costs. 4.Significant drilling fluid losses, leading to higher environmental pressure Key Factors Affecting Shale Shaker Performance 1.Improper screen selection.Abnormal installation or operation of vibration motors. 2.Drilling fluid flow rate exceeding the equipment’s design capacity. 3.Lack of regular inspection and maintenance. Therefore, establishing standardized operating and maintenance procedures is essential. ...
阅读全文