Category Archives: Mud Gas Separator

Drilling fluid gas-liquid separator is the first stage professional equipment to treat the gas invade mud. It is mainly used to remove the big bubbles with the diameter of about ≥Φ3mm.Most of these bubbles are the expanded gas filled in the drilling fluid in annular of wellbore. It would cause well kick if mot to remove it timely.

Operation principle

Drilling fluid with gas invades goes into the separator at the import tangentially and drops to a series baffles along the inner wall. After collision to increasing the contact area, It flows downward and become to a turbulent state which makes gas separate from mud and the free gas passes through the top of tank and discharged from the gas export. The length of gas export pipe can be determined at site and be induced to the safe place. The drilling fluid without gas will flow into the circular tank.

mud gas separator

How to Installation

1. Generally, the separator is installed on the surface next to the 1# tank. The surface should be flat and stable.
The main body is lifted vertically to the surface by crane at the auriculars on the top of main body and then put down slowly. Three places on the top of the main body are pulled tightly by the steel string to assure the main body to be vertical to the surface.
2. After installation, Exhaust line the 2# channel 60-80mm distance of the mouth of a well.(The line is oneself, if needed to manufacturer provide, explain away to the speak for).Connecting the 3# import to the rotary prevention or throttle conduit and close the 4#waste export, open the 7#mud export and connect to 1# mud tank by the pipe.
3. When in moving, disassemble the pipe and loose the tightened string. Lift the top of the main body to make the auricular plane by crane. The ladder can be used as bracket in this situation.

Maintenance

Discharge the mud in the separator totally when in spare time and other are not needed.

Mud gas separator separates the gas which is from throttle manifold and process the gas cut drilling fluid, removing the gas, natural gas, hydrogen sulfide, co, co2 which are mix in drilling fluid, and recovery the degassing drilling fluid, then it is further processed by vacuum degasser, it is send back to drilling fluid circulating tank.

After occur overflow and close the well and complete well control calculate scheme, the throttle pipe is soaked mud have already connected well, mud gas separator has already connected well.

1. When using the mud gas separator in installed cleaning value and U pipeline discharge value must be closed.

2. Checking the discharge pipeline safety fixed rope or chain.

3. Open the throttle pipe value which is leading to mud gas separator.

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After start the well control process, the mud returned from hohlraum through the throttle pipeline enter into drilling fluid mud gas separator. The separated gas by mud gas separator is discharged and the mud is discharged from separator is directly return to shale shaker.

1. During the working, continuous monitoring mud gas separator and detection the returned shale shake tank mud.

2. After well control successful, open the bop and closed the throttle pipe value which is connecting mud gas separator.

3. Opening the mud gas separator cleaning value and all rock debris are discharged to pollution pool.

4. If use the U pipe separator, open the U pipe discharging value and clean it with water. The all solid are discharged to pollution pool.

5. Cleaning, washing and checking all manifold, pipe line and value and according the requirement of soft shut well and hard shut well of drilling design rearrange the throttle pipe and the working condition of mud gas separator.

Mud gas separator is a safety equipment in drilling fluid circulating system, which installed in front of shale shakers. But, how to
calculate the flow is a problem. Following is the instruction of all details.

Peak Gas Flow Rate. the critical time for mud gas separator blow-through exists when peak gas flow rates are experienced. Mud/gas separator
blow-through is defined as inefficient separator operation resulting in a mud/gas mixture returning to the mud tanks through the mud
return line.

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Two situations can cause separator blow-through.

1. Friction pressure of the gas venting through the vent line exceeds the mud-leg hydrostatic pressure, resulting in evacuation of
fluid from the separator. Friction pressure of the mud through the mud return line is considered negligible because of its short
length.

2. Vessel ID is too small, causing insufficient retention time for the gas to separate efficiently from the mud. This situation is
commonly called insufficient separator cut.

To estimate a peak gas flow rate properly, we must consider a “typical” kick. The typical kick will depend on the well location,
depth, type size, and component ratios of influx. Kick data should be based on previous offset well data and should be a realistic
worst-case gas kick. The well and kick data in Fig. 5 will be used in this paper.

The volume and pressure of the gas upstream of the choke must first be calculated.

The mud gas separator is designed to remove gas from the mud/fluid before it is transferred to the shale shaker system. It separates gas out of the mud after the gas comes out of hole.

The mud gas separator is strictly used for well control only. There are some events that this equipment is utilized in a well testing operation. Additionally, inspection for the gas buster must be performed frequently the same as other well control equipment.

mud gas separator

People tends to forgot about this since it is just only a vertical separator tank without high pressure specification like BOP, choke manifold, valves, etc. Erosion is one of the worst enemies to the vessel like this and it can be seen at the points where the drilling mud impinges on the internal wall vessel.

Each mud gas separator has limitation on much it can safely handle volume of gas. If the volume of gas exceeds the maximum limit, gas can blow through into the rig. It is very important that you must estimate gas flow rate on surface based on pit gain and kill rate in order to see how much expected gas on surface.

This will be the limitation on how much you can circulate for well killing operation. You can estimate the volume gas on surface by using well control kill sheet provided by several companies. You need to ensure that the vent line should be as straight as possible with a larger ID in order to minimize back pressure while venting the gas out.

Mud gas separator(Poor Boy Degasser) is professional equipment to treat the gas invade mud. Two sets of mud gas separators shipped to
foreigns yesterday.

Mud gas separators in other countries also called Poor boy degasser,Liquid-gas separators,Mud/Gas Separators, etc. DC Solids Control
designs and manufactures ZYQ Mud gas Separators. Mud gas Separators is an extremely reliable, vital piece of safety equipment for
today’s drilling operations.

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Based upon your predicted operating conditions and your required gas handling capacity we will be able to calculate the optimal size
of your mud gas separator. All our mud gas separators are supplied with a complete calculation package; this will include mechanical
strength calculations, theoretical separation capacities and safe working pressures etc.

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DC solid control is capable of providing customers with all kinds of oil & gas drilling solids control equipment, centrifuges and
drilling waste treatment equipment, including 25 categories of products, which are extensively used in oil & gas drilling and
workover, coalbed methane drilling, shale gas drilling, water well, geothermal well drilling, trenchless horizontal directional
crossing projects, mine gravel staged treatment, tailings treatment, rive dredging works, industrial wastewater treatment,
environmentally friendly sewage treatment, waste oil recovery and purification treatment, etc.

MUD/GAS SEPARATOR offers the industry’s highest gas and liquids handling capacity and enables operators to drill deeper, large diameter and exploratory wells at higher circulating rates which is engineered specifically for onshore drilling operations.

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.

liquid gas separators

Working principle of the mud gas separator

The drilling mud with gas mixture in the bore hole is transferred by mud return lines to the inlet of the mud gas separator, allowing it to impinge on a series of baffles which separates gas from drilling mud. The free gas flows into the flare line to be burned and the mud discharges to the shale shaker and to the mud tank.

mud gas separator

Performance Features:

Maximizes free gas/mud separation.
Unique U-shaped tube design eliminates moving parts and ensures a positive fluid seal, maintaining safe mud levels.
Safely handles trip gas in under-balance drilling applications.
Efficient baffle arrangement to easily separate gas from fluid.
Two vertical surge chamber pressure lines allow expansion and diffuse downstream pressure.
Available in varying sizes and lengths, accommodating any volume of fluid with high concentrations of gas.
Heavy-duty steel construction and adjustable mounting skid for any rig.

Drilling fluid gas-liquid separator is the first stage professional equipment to treat the gas invade mud. It is mainly used to remove the big bubbles with the diameter of about ≥Φ3mm.Most of these bubbles are the expanded gas filled in the drilling fluid in annular of wellbore. It would cause well kick if mot to remove it timely.

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Operation principle

Drilling fluid with gas invades goes into the separator at the import tangentially and drops to a series baffles along the inner wall. After collision to increasing the contact area, It flows downward and become to a turbulent state which makes gas separate from mud and the free gas passes through the top of tank and discharged from the gas export. The length of gas export pipe can be determined at site and be induced to the safe place. The drilling fluid without gas will flow into the circular tank.

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How to install

Generally, the mud gas separator is installed on the surface next to the 1# tank. The surface should be flat and stable.
The main body is lifted vertically to the surface by crane at the auriculars on the top of main body and then put down slowly. Three places on the top of the main body are pulled tightly by the steel string to assure the main body to be vertical to the surface.
After installation, Exhaust line the 2# channel 60-80mm distance of the mouth of a well.(The line is oneself, if needed to manufacturer provide, explain away to the speak for).Connecting the 3# import to the rotary prevention or throttle conduit and close the 4#waste export, open the 7#mud export and connect to 1# mud tank by the pipe.

When in moving, disassemble the pipe and loose the tightened string. Lift the top of the main body to make the auricular plane by crane. The ladder can be used as bracket in this situation.

I got the inquiry 30 days ago from my old clients who from Newzeland. And the clients want to a quality mud gas separator and requred the treating capacity is 80 m3/h, but our traditional mud gas separator is ZYQ800, ZYQ1000 and ZYQ1200. But the smallest treating capaity is 200-260m3/h all can’t meet his requirements.

mud gas separatorBut in order to satisfied our clients requirements, our engineer give a new design accroding to the needs. The mud gas separator model is ZYQ600. Its main body diameter is 600mm, capacity is 80-150m3/h, inlet pipe is 3″, outlet pipe is 4″ and gas discharge pipe is 5″. After we send the new specification to the clients who are very satisfied with our design and advanced technology. After 15 days, the mud gas separator have alerady finished and prepared to delivery. Below is the pictures.

Why use mud gas separator

ZYQ series Mud gas separator(Poor Boy Degasser) is professional equipment to treat the gas invade mud. 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. Mud gas Separator can be used to ensure the drilling process smooth.

Principle of operation

The principle behind the mud gas separator is relatively simple. On the figure, the mud and gas mixture is fed at the inlet allowing it to impinge on a series of baffles designed to separate gas and mud. The free gas then is moved into the flare line to reduce the threat of toxic and hazardous gases and the mud then discharges to the shale shaker and to the tank.

From above we know that, mud gas separator is the key equipment to ensure drilling safety. DC Solid control is a professional manufacturer of mud gas separator, we have ability and advanced technology to design any model equipment according to clients need, so if you have requirement of solid control equipment, welcome to consult us, believe we can provide the best design scheme for you.

Liquid gas separator process applied in variety industrial place are based on “Gravity settling”, “Impingement” and “Centrifugation, mechanisms.  Sometimes, they use either one or a combination of them and also” Filtration. As for a general rule, mechanical separation happened when the phases are not miscible and have different densities.

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In momentum separation, fluid phases with different densities and have different momentum. Due to change of a two phase stream direction suddenly, the heavy phase of liquid( greater momentum) separated from the loght fluid. Gravity separation when occurs that liquid droplets settle out of a gas phase and the gravitational force of the droplet is greater than the drag force of the gas flowing around the droplet. Also in filtration, a fluid-solid or liquid-gas mixture will pass through a porous barrier which traps most of the solid or liquid particulates contained in the mixture.

The vertical gas-liquid separators are one of the fixed process equipment. This article attempts to five methods of two-phase separator design. Two phase separators can employ either vertically or horizontally. Im some cases, sometimes, separators may be having inlet diverters or designed with or without mist eliminator pads.

Why choose vertical gas-liquid separators:

1 The gas-liquid ratio is high.
2 A smaller plan area is required( critical on offshore platforms)
3 Easier solids removal.
4 Liquid removal efficiency doesn’t vary with liquid level.
5 Vessel volume is generally smaller.

Recent wellsite have led to an increased emphasis on properly sized mud/gas separator. This paper reviews and analyszes existing mud/gas separator technology and recommends separator configuration, components, design considerations, and a sizing procedure. A simple method of evaluating mud/gas separation within the separator vessel has been developed as a basis for the sizing procedure.

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 be handled by a vacuum-type degasser located in the mud pits. The mud/gas separator controls gas cutting during kick simations, during drilling with significant drilled as in the mud returns, or when trip gas is ciculated up.

Mud gas separator sizing and design selection is important for petroleum well drilling.Welcome to consult DC for the right sizing and fit design for your mud gas separator in oilfield drilling mud.