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Category Archives: Mud gas separator

Simplified Principle And Operation Of Mud Gas Separator

The mud/gas separator is designed to provide effective separation of the mud and gas circulated from the well by venting the gas and returning the mud to the mud pits. Small amounts of entrained gas can then be handled by a vacuum-type degasser located in the mud pits. The mud/gas separator controls gas cutting during kick situations, during drilling with significant drilled gas in the mud returns, or when trip gas is circulated up.

The operating principle of a mud/gas separator is relatively simple. The device is essentially a vertical steel cylindrical body with openings on the top, bottom, and side.

poorboy degasser

The mud and gas mixture is fed into the separator inlet and directed at a flat steel plate perpendicular to the flow. This impingement plate minimizes the erosional wear on the separator’s internal walls and assists with mud/gas separation. Separation is further assisted as the mud/gas mixture falls over a series of baffles designed to increase the turbulence within the upper section of the vessel. The free gas is then vented through the gas vent line, and mud is returned to the mud tanks.

mud gas separator

Operating pressure within the separator is equal to the friction pressure of the free gas venting through the vent line. Fluid is maintained at a specific level (mud leg) within the separator at all times. If the friction pressure of the gas venting through the vent line exceeds the mud-leg hydrostatic pressure within the separator, a blow-through condition will result sending a mud/gas mixture to the mud tanks.

As one can readily see, the critical point for separator blow-through exists when peak gas flow rates are experienced in the separator. Peak gas flow rates should theoretically be experienced when gas initially reaches the separator.

How to choose a suitable mud gas separator in oilfeld

A Mud Gas Separator , or gas buster, is common on most drilling rigs throughout the world. The mud gas separator is used to separate wellbore gas from the drilling fluid while circulating out a kick or circulating any gas present in drilling fluids during drilling or workover operations.

mud gas separator

There are numerous factors that go into properly sizing a mud gas separator system:

1. Kick size – A reasonable scenario for a kick size is needed so that the size of the gas bubble when it is circulated to the surface can be calculated.
2. Maximum casing pressure – The casing pressure realized when the gas reaches the surface.
3. Kick circulation rate – The kick circulation rate is required in order to calculate the gas flow rate through the system.
4. Vent line friction – The vent line friction is needed in order to calculate the required height of the fluid leg.
5. Mud leg height – The minimum mud leg height is calculated using the vent line friction pressure and the fluid density anticipated during the kick circulation.

A typical mud gas separator from China top supplier

A MUD GAS SEPARATOR, or gas buster, is common on most drilling rigs throughout the world. The mud gas separator is used to separate wellbore gas from the drilling fluid while circulating out a kick or circulating any gas present in drilling fluids during drilling or workover operations.

A typical mud gas separator is constructed of a cylindrical vessel with a series of baffles in it. The drilling fluid from the
wellbore enters the mud gas separtor, and the action of the fluid hitting the baffles separates easily removed gas from the fluid. The gas exits through a vent line at the top of the mud gas separator and is safely vented away from the rig floor. The mud exits the mud gas separator through a line near the bottom of “up hill” to return to the pit system.

mud gas separator

Key features/benefits

Three way control valve for accurate splitting of the process fluid
Linear plug for proportional control
Accurate control of the process fluid
Simple low cost inline maintenance
Comprehensive interchangeable parts system

To be a top quality mud gas separator supplier in China. DC designs 4 models, such as ZYQ600, ZYQ800, ZYQ1000, and ZYQ1200. If you have interest with them, please contact DC Solid control freely.

Performance characteristics of mud gas separators

In a well-controlled situation, well bore fluids are directed through the choke and kill manifold to circulate hazardous gas in a safe and controlled manner using the Mud Gas Separator.

In the oilfield, the mud gas separator is sometimes known as ‘poor boy degasser’ or ‘gas buster’. They may be vertical or horizontal in design.

A Vertical separator is normally used for high fluid throughput, while a horizontal separator provides a longer retention time and superior gas separating capacity. Internal design and configuration (e.g. blast chamber, baffle plate etc.) governs the individual efficiency of the equipment.

mud gas separator

Performance characteristics
The limitation to the efficiency of a mud gas separator is dedicated by:
(i) Separating Capacity – the capacity to separate gas from the liquid is determined by the internal configuration and fluid dynamic characteristics of the separator.
(ii) Venting Capacity – the capacity to vent gas through the derrick vent is subject to the backpressure of the vent line and the hydrostatic head of the liquid seal.
(iii) Liquid re-entrainment Capacity – the capacity when the liquid droplets break away from a gas/liquid interface to become suspended in the gas phase. The term re-entrainment is used in separator design because it is assumed that droplets have settled to the liquid phase and are then returned to the gas phase.

It should be noted that the capacity of the separator to separate gas from the liquid may be considerably less than the capacity to vent gas within the limit of the liquid seal.

DCZYQ Mud Gas Separator Design Principles

DCZYQMud Gas Separator(Poor Boy Degasser) is a specific degassing equipment of drilling fluid with gas, it is mainly used to remove big bubbles in diameter no less than φ3mm in gas drilling fluid. DC’s Mud Gas Separator has a lot of advantages including reliable safety, better treatment effect, long service life, etc.

mud gas separators

1) Venting Capacity – The capacity to vent gas

This capacity is the rate at which gas can be vented when the seal is operating at its maximum pressure differential when the liquid seal contains only associated liquids from the hydrocarbon influx. A gradient of 0.69 sg (0.3 psi/ft) should be assumed to determine
the maximum pressure differential.

2) Separating Capacity – The capacity to separate gas cut fluid.

The capacity to separate must not be confused with the capacity to vent. Ideally, the capacity to separate should be greater than the vent capacity, but this may not be possible given the low operating pressure and the constraints of the rig layout. In practice, the
capacity to separate may be only 10% of the vent capacity.

3) Liquid (Droplet Size) Re-entrainment Capacity

Entrainment refers to liquid droplets breaking away from a gas/liquid interface to become suspended in the gas phase. The term re-entrainment is used in horizontal-separator design because it generally is assumed that droplets have settled to the liquid phase and
then are returned to the gas phase.

If you want to learn more details of mud gas separators, please contact us.

The optimization of mud gas separators from DC Solid control

DC Mud gas separator offers the highest gas-and liquid handing capacity available. Its highly efficient baffling system maximizes mud gas separation, enabling operators to drill deeper, large-diameter wells and exploratory wells at higher circulating rates while safely handling greater volumes of gas. It also minimizes mist carry over and gas-cut mud at the flow line.

mud gas separator

Main features of mud gas separators manufactured by DC Solid control :

1. Main body diameter are 600, 800, 1000 and 1200mm which can allows the highest gas- and liquid handling capacity available.
2. Optomizes safety and control. The mud gas separator unit enhances safe drilling practices during underbalanced conditions, improves” kick” handling capabilities, permits optimum circulation rates and large-diameter holes to the drilled through the targeted zone.
3. High efficiency baffle system. Maximizes mud gas separation, minimizas mist carryover which produces a cleaner flare and minimizes gas-cut mud at the flow line.
4. Capable pressured operation. Increases gas-and liquid handling capacities and permits immediate sale of gas during drilling operations.

DC use high quality steel materials manufacturing normal pressure prevent H2S Mud Gas Separator,can effectively prevent the harmful gas erosion, ensure the man- machine safety production.

High quality poorboy degasser China producer

Mud Gas Separator is commonly called a gas-buster or poor boy degasser. Mud gas Separators seats beside mud solids control system and is used only when the drilling formation exists toxic and hazardous gases.

MUD GAS SEPARATOR

To be as a high quality mud gas separator producer in China. We have below advantages compares with others.

DCZYQ Mud Gas Separator Features and Benefits

1. Baffle plates within vessel creates Maximum removal of free gas
2. Skid-mounted design enables easy transportation, rig-up and rig-down
3. Designed, manufactured and tested in accordance with API & ISO standards.
4. DC use high quality steel materials manufacturing normal pressure prevent H2S Mud Gas Separator,can effectively prevent the harmful gas erosion, ensure the man- machine safety production.

Besides DCZYQ series Mud gas Separator combined with the Electric Ignition Device can be used to ensure the security of drilling process. It is divided into the normal pressure Mud gas separator and pressure auto-control Mud gas separator according to the pressure.

How much do you know of mud gas separators used in oilfiled.

Drilling fluid mud gas separator is a special equipment of gas cut drilling fluid primary degassing, it is mainly used to eliminate the bubbles which the diameter is about3-25mm. And mud gas separators are widely used in depth drilling well to be as an safety device. But, how much do you know the equipment used in oilfiled. Following is the introduction of the mud gas separators.

mud gas separator

How to works of mud gas separators

The gas cut drilling fluid enter into separator from the separator inlet month, after impacting with the impact plate, scattered in a series baffle, crashing and increase and reveal the surface area, then downward flow causing the flocculated flow state, make the gas separation with drilling fluid. The free gas is discharged through the gas outlet of the top tank, the length of the exhaust pipe is decided and installed by the field and is lead to the safe place, but the after degassing drilling fluid flow into circulating tank through drilling fluids shale shaker.

degassing equipment

How to install of mud gas separator

It is installed in the ground near the 1 circulating tank, using the wire rope fixed the lifting lug place up the separator main body with the ground.
According the requirements of diagram form to connect the line after install well.

How to the daily maintenance of mud gas separators

We should check the bottom buffer plate when use it, we must replace the two baffle if the wearing is extend 10 mm.
The drilling fluid in mud gas separator should be emptying after use (especially in winter) and open the cleaning month or the entrance is cleaned.

To be as the leader maufacture of oilfiled mud equipment. DC solid control can produce many types of degassing equipment. If you have request of it, please don’t hesitate to contact us, there you will getting mutual benefit product and service.

 

Why Mud gas separator can well used in drilling exploration

Drilling fluid mud gas separator is the special equipment to treat the gas cut drilling fluid. The fluid can enter into from placed bop, also can from choke manifold to separate the big bubbles. The treated drilling fluid also have small bubbles, then enter into degasser to proceed the convention degassing, it is the ideal solid control equipment in drilling process.

mud gas separator

Working principle of mud gas separator

The gas cut drilling fluid enter into separator from the separator inlet month, after impacting with the impact plate, scattered in a series baffle, crashing and increase and reveal the surface area, then downward flow causing the flocculated flow state, make the gas separation with drilling fluid. The free gas is discharged through the gas outlet of the top tank, the length of the exhaust pipe is decided and installed by the field and is lead to the safe place, but the after degassing drilling fluid flow into circulating tank through drilling fluids shale shaker.

Installation site of mud gas separator 

It is installed in the ground near the 1 circulating tank, using the wire rope fixed the lifting lug place up the separator main body with the ground. According the requirements of diagram form to connect the line after install well.

DC Solid control company has already widely popularized and applied mud gas separator in oil exploration and CBM development, we contribute to drilling industry and environment protection industry.

Necessity of mud gas separator in drilling site

Mud/Gas Separators are ideal for use where drilling is likely to encounter large volumes of gas. The technology is especially beneficial in sour gas environments or when drilling with an underbalanced mud column.

Function of mud gas separator

The mud/gas separator is designed to provide effective separation of the mud and gas circulated from the well by venting the gas and returning the mud to the mud pits. Small amounts of entrained gas can then be handled by a vacuum-type degasser located in the mud pits. The mud/gas separator controls gas cutting during kick situations, during drilling with significant drilled gas in the mud returns, or when trip gas is circulated up.

mud gas separator

Dangerousness if not use mud gas separator

When the drilling mud result gas invade, the proportion of its weight and viscosity have a greater deviation not to meet the requirements of drilling. The serious situation is that would cause Chung well, and even blowout accident occurred, if not to treat it timely.

Classification of mud gas separator 

Mud gas Separator combined with the Electric Ignition Device can be used to ensure the drilling process smooth. It is devided into the normal pressure Mud gas separator and pressure auto-control Mud gas separator, according to the pressure.Mud gas Separator is your best choice to prevent drilling mud invasion.

 

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