#hydrocyclone separators

Kapwell Ltd, a UK based company, offers Mud Gas Separator, Liquid Seal Monitoring, Vacuum Degasser, Choke Control system, Vent Tower for MGS and Flowmeter Skid suitable for offshore, Landrig and shale gas drilling operations. We guarantee high quality for each and every package.

What is an Atmospheric Degasser?

An atmospheric degasser removes all gaseous components from the drilling mud on oil rigs. This helps to separate and safely dispose of harmful or dangerous gases entrained in the drilling mud, including carbon monoxide, hydrogen sulphide, and even oxygen.

Principle

An atmospheric degasser utilizes impact and turbulence to separate gases from the drilling mud. A motor pumps up the drilling fluid from the bottom of the mud pit to a separation tank situated at an elevation.

A circular disk, called the strike plate or the splash plate, allows the mud to become a high-velocity fluid sheet. The high-velocity fluid hits the walls of the degasser with a force large enough to separate gas bubbles from the drilling mud. The eliminated gases reach an exhaust pipe upwards, while the degassed mud flows to the next processing equipment.

Materials used

Atmospheric degassers are typically made from stainless steel. External surfaces are generally coated with polyurethane, while interior surfaces receive an epoxy coating to enhance durability.

Atmospheric degasser variety

The strike plate diameter can typically range from 0.25’’ to 1.25’’. The choice of strike plate size depends on the desired flow capacity. Some atmospheric degassers can allow for an adjustable strike plate size, making these devices more robust and efficient.

Different atmospheric degassers are also available to cater to varying mud pit depths, such as 6’, 8’, etc.

Head Office

Provender House, 37 Waterloo Quay, Aberdeen, Scotland, United Kingdom AB11 5BS

What is a Vacuum Degasser?

Vacuum degassers are gas treatment machines used in the oil and gas industry. They degas the drilling fluid by removing any entrained gases, including hydrogen sulphide and oxygen.

Vacuum degassers have a higher efficiency but a lower throughput ability compared to other available degassers. As such, they are most commonly employed on oil wells where the mud flow rate is expected to be lower but the gas volume is expected to be high.

Why is a vacuum degasser necessary on an oil rig?

By removing all gases from the mud, vacuum degassers prevent possible blowouts on an oil rig, thus maintaining human safety. Moreover, vacuum degassers agitate the drilling mud that passes through them, which aids phase separation by desanders and desilters.

Principle

A vacuum degasser first draws the drilling fluid, with entrained gases, into its tank by means of vacuum suction. The drilling mud is pulled into the degasser because of the vacuum created by a regenerative blower.

As the volume of the liquid in the tank increases, the drilling fluid comes into contact with serially arranged metallic plates in the machine. This contact facilitates the release and separation of gas bubbles from the mud. The separated gas leaves the system with the help of a gas pump, while the degassed mud reaches ahead for further processing.

Installation and setup

Vacuum degassers are generally installed after shakers on an oil rig. When installing vacuum degassers, a mud pump is separately included to facilitate the operation of the eductor nozzle. It is also possible to include a fluid level sensor in the setup to prevent excessive suction of mud fluid.

https://kapwell.co.uk/products/degasser/vacuum-degassing/

Head Office

Provender House, 37 Waterloo Quay, Aberdeen, Scotland, United Kingdom AB11 5BS

What is a Desilter Cyclone?

Desilter cyclone is a necessary third-phase solids control equipment for drilling mud treatment in the oil and gas industry. These machines are used to separate silt and other silt-sized particles from mud. The particles removed are typically in the 15-74 microns size range.

Overall, desilters help decrease the average particle size and eliminate abrasive particulate matter (grit) from the drilling fluids.

Principle

Cyclones help remove solid particles from fluids by using centrifugal force. During operation, solids fall outwards because they are heavier, while the fluid moves upwards through the pipeline. Meanwhile, particulate solids are eventually pushed downwards into an accelerating spiral.

Installation and setup

In terms of the sequence of installation, desilter cyclones come after shale shakers, degassers, and desanders – the other solid separation machines on an oil rig.

The diameters of the mud inlets and outlets are typically fixed at 2’’, making the desilter cyclone a conical device. The fixed inlet and outled diameters also give the desilter cyclone an easy-to-maintain clamp design. The drilling mud enters the desilter cyclone at the end with the maximum inner diameter.

Multiple desilter cyclones can be installed together in a desilter unit to maximize mud flow capacity and achieve high throughput. A good desilter cyclone design will allow the user to separately remove and inspect each individual cone from the desilter cyclone cone manifold.

Desilter cyclone variety

To ensure optimum functionality, the geometry and make of a desilter cyclone are crucial aspects to consider. Desilter cyclones come in various sizes, with inner diameters of 2’’, 4’’, 5’’ and 6’’. The most commonly used desilter cyclones in the oil and gas industry are the ones with the 4’’ and 5’’ inner diameters.

The cones of desilter cyclones are typically made of materials that offer a high wear resistance, such as polyurethane. Note that using a cone with a high volume can help minimize plugging of the equipment.

Further, desilter cyclones can be designed to reduce mud loss on an oil rig. Using cone apex inserts of different sizes, depending on the situation, can help reduce mud loss.