Tag Archives: mud gas separator

Solids control system/mud recycling system for Cuba

GN designed and produced oil drilling solids control system and drilling mud recycling system have been operated in the rig sites of 60 countries in the world, including Cuba. Estimates of total oil reserves in Cuba are varied, and depend mainly on estimations of undiscovered offshore deposits in the North Cuba Basin. Fearing an oil spill in Cuban waters, U.S. officials have forged a bond with the Castro regime to preserve the threatened marine ecosystem that connects the island nation to the Florida coast.

Below photos showed the workover rig solids control system used in Cuba: It including one set of XJ450 workover rig solids control system and one set of XJ650 workover rig mud recycling system. The main configurations are as below:

XJ450 workover rig solids control system:

2 units of mud tanks with mud agitators, mud guns, hoppers

1 set of mud gas separator

1 unit of water tank

1 unit of waste collection box

XJ650 workover rig mud recycling system:

2 units of mud tanks with mud agitators, mud guns, hoppers and shale shaker GNZS703E-HB

1 unit of diesel tank

1 unit of water tank

1 unit of fuel tank

1 unit of waste collection box

1 set of mud gas separator

The main features of these mud tanks are not traditional Rectangle tank, but V-bottom tank for easy cleaning of solids. Except for such design, we can also provide customized design tank like round bottom tank for easy cleaning, trailer/wheel mounted mud tank for easy transportation, and 3-runner oilfield standard design mud tanks. The mud tanks qty and total system volume can be also customized. If only the end-user have such special requirement, we will try our best to provide the best solution for your rigsite.

Pls contact either GN solids control or GN solids America for a customized proposal.

Related Arciels:

Security Equipment in solids control system

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For earth surface engineering, the contractor no need to consider about combustible gas or explosive gas, like HDD no-dig engineering, piling engineering, tunneling engineering, waterway dredging engineering. But for deep drilling engineering, like oil & gas drilling, Coal bed methane drilling, shale gas drilling, all the motor and control panel should be ex-proof standard. The standard should also separately as per different geological conditions. Some security equipment is also necessary.

1) Mud Gas Separator ( poor boy degasser) — security equipment in solids control system for deep drilling

When gas cuttings happened to drilling fluid, the gravity and viscosity of drilling mud will be changed a lot and cannot satisfy the requirement for drilling, even lead to kick or blowout accident. The mud gas separator , made of high quality material , can be used to separate the harmful gas effectively.

GN Solids Control can supply the best quality mud gas separator with other solids control equipment, like shale shaker, decanter centrifuge, mud cleaner etc.

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Mud circulation system with mud gas separator

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See the photo on the right, it is a mud circulation system with mud gas separator, in oil drilling solids control system, the 1^st phase cleaning equipments of mud circulation system is shale shaker, which is fed the mud from high pressure manifold, the mud gas separator is fed mud from the chock manifold. When much of harmful gas is found during drilling, they close the valve to stop feeding the shale shaker, and open the valve to feed to mud gas separator, and use hundreds of exhaust pipe to transfer the harmful gas from mud gas separator to a place far from well head, and use flare ignition device to burn it. Mud gas separator is not a part of solids control system, GN can manufacture both of them, so we put them together for your convenience.

Mud circulation system with mud gas separator

Mud circulation system is also called mud cleaning system, mud recycling system, solids control system, Usually if a mud circulation system with mud gas separator, it is usually oil & gas drilling or geothermal, it can not be HDD or water well drilling. Mud gas separator is horizontally installed on the skid with the chock manifold on it together, it is easy for transportation.

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Mud system for a Rig

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As a part of rig package, mud system is a separate but an essential part, the handling of drilling fluids can save huge cost of drilling. In the early oil industry open earthen pits were used as settling area to separate solids and mud thereby acting as a solids control equipment.

mud system for a rig

Now, with the stringent environmental regulations and high mud costs, the economics of an effective mud system come into consideration. Different solids control companies introduce zero-discharge systems, closed-loop systems, “quick move” technology, screening technology, disposal options etc. No reserve-mud pit is used in a truly closed mud system. Mud is continually processed primarily by mechanical means, such as screening, hydrocyclone and centrifuging to remove solids initially. A second stage to remove colloidal solids is by wastewater cleanup techniques.

Major components of a mud system, including:

Mud gas separator, flare ignition device

Shale shaker, mud cleaner(or desander, desilter), vacuum degasser, decanter centrifuge , centrifugal pump, mud hopper, mud agitator, mud gun, mud tank and others, such as cutting dryer, screw auger, mud cooling unit,etc.

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Mud gas separator in stock

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GNZYQ1000 mud gas separator is capable of handling 1000~1400gpm drilling fluids. We have 6 units of mud gas separator in stock which are all ready for shipment with painting &　package, welcome to contact with our sales. Except for mud gas separator, we also have flare ignition device in stock, which usually worked together with mud gas separator for oilfield. Mud gas separator is used to separate the harmful gas from the drilling mud, then flare ignition device is used to connect to the gas discharge line of mud gas separator, and burned it , they work together to avoid “kick” situation.

According to base type , the mud gas separator can be divided into :

mud gas separator

Fixed type
Elevating type

According to the bracket type, it can be divided into horizontal type and vertical type. Most of Chinese mud gas separator is vertical installed, when you need to transport it, you can lay it down , and there is lifting pad hotizontally. MI-SWACO mud gas separator is horizontal type with a skid, it is for simplifies transport, spotting and installation. Unit can lay down during over-the-road transport

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Poor boy degasser in stock

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GN has 4 units of poor boy degasser in stock, in addition, we have 9 units of flare ignition device in stock, which is worked together with poor boy degasser as safety equipments in the oilfield drilling.

poor boy degasser in stock

The poor boy degasser model in stock:

Model	GNZYQ1000G
Main body diameter	1000mm
Capacity	240~320m³/h
Inlet pipe	4″
Mud Output pipe	10″
Gas discharge pipe	8″
Weight	2000kg
Dimensions	2000×2000×5860mm

How poor boy degasser work to be anti-H2S?

( harmful gas , including but not limit to H2S)

1^st way: The main material of the poor boy degasser body is 16Mn(Q345A), which is low alloy, high strength steel.

2^nd way: By 3 layers of Marine Anti-Corrosion Zinc Rich Expoxy Paint:

(1). Sand Blast Treatment before painting.

(2). Two pack Epoxy zinc

(3). Two Pack Epoxy hi-build containing anticorrosive pigmentstwice.

(4). Surface pigmented with high quality light fast PU pigments

To buy poor boy degasser in stock, welcome to contact GN solids control.

Flare Igniters in Stock

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GN has 6 units of flare igniters in stock, they are widely used for oil & gas drilling operations, usually works together with GN own designed mud gas separator. The flare igniters are used for connecting to the gas discharge line of mud gas separator, and fire the dangerous gas from the drilling mud like H2S. GN manufacture the flare igniter according to API &ISO standard, which meet most of the oil industry applications.

: flare igniters in stock

The upper part of the flare igniter is stainless steel, and it is designed for rain proof , water proof in the oilfield. The major components for the electrics are from famous brand like Siemens or Schneider. The power of the electric can be directly from industry normal power, or users can charge the battery and take the unit for remote areas application. GN flare igniter is with remote control, and PLC is optional available for less manpower notice for continually and automatically working.

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Gas buster

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Gas buster also called poor boy degasser or mud gas separator, which is used for oil and gas drilling. The description on oilfield glossary is “A simple separator vessel used to remove free or entrained gas from fluids circulated in the wellbore, such as mud used during drilling operations. The gas buster typically comprises a vessel containing a series of baffles with a liquid exit on the bottom and a gas-vent line at the top of the vessel”.

gus buster

Gas Buster

is an important equipment to prevent well kick during drilling, so the production process should be strictly controlled. The process control including the following aspects:

1 Surface preparation

Steelwork:

Before all paint actions will be taken the surface to be coated must be clean and free from contamination. Sharp edges shall be rounded or smoothed to radius 2 mm. Hard surface layers shall be removed by grinding before blasting. All welds shall be fully sealed.

Abrasive Blast Cleaning:

As abrasive steel grit or copper slag can be used. If oxidation has occurred between blasting and application of paint, the surface should be reblasted to the specified visual standard.

Surface defects revealed by the blast cleaning process, should be ground, filled, or treated in the appropriate manner.

2 Painting

Intershield 300 aluminium GTA 220

Intershield 300 bronze GTA 220

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Flare stack/gas flare

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As refer to mud gas separator or poor boy degasser, you may heard of “Flare stack”.

A flare stack (alternatively known as gas flare ) is a vertical vent pipe used in oil and gas drilling sites. The pipe diameter of flare stack is usually 8” for GN ZYQ series poor boy degasser.

flare stack

The function of flare stacks

They are used to eliminate waste gas invaded in the drilling mud, otherwise it will lead to “blowout”, “kick”. They also act as safety systems for non-waste gas and is released via pressure relief valve when needed to ease the strain on equipment. They protect gas processing equipments from being over pressured. Also in case of an emergency situation, the flare system helps burn out the total reserve gas.

How flare stacks work

Whenever the poor boy degasser are over-pressured, the pressure relief valves automatically releases gases which are routed through large piping runs called flare headers to the flare stacks. The released gases are burned as they exit the flare stacks. The size and brightness of the resulting flame depends upon the flammable material’s flow rate in terms of joules per hour.

In order to keep the flare system functional, a small amount of gas is continuously burned, like a pilot light, so that the system is always ready for its primary purpose as an over-pressure safety system. The continuous gas source also helps diluted mixtures achieve complete combustion. Enclosed ground flares are engineered to eliminate smoke, and contain the flame within the stack.

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How to evaluate a Mud gas separator

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The mud gas separator is used in a ‘kick’ situation to separate large volumes of free gas invaded in the drilling fluid.

Function of Mud gas separator

Mud gas separator also called poor boy degasser, Gus buster, which is designed to provide effective separation of the drilling mud and invaded gas from the well by venting the gas and returning the mud to the mud pits. Small amounts of entrained gas can then be handles by a

liquid gas separator

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 leg height is an important parameter for the mud gas separator, you need to clear it during evaluation.

What is Mud leg?

The mud leg in the separator is controlled by adjusting the fluid level in the mud tank or by moving the separat6or up or down within the tank. Mud tank height can restrict the maximum mud leg obtainable for open-bottom mud gas separator.

Mud leg is an important part for mud gas separator, it is also called Fluid level. Fluids level is maintained in a float mud gas separator by a float/valve configuration. The float opens and closed a valve on the mud return line to maintain the mud leg level. Valves can be operated by manual linkage system connected from the float to the valve, or the valve can be air-operated with the rig air. Mud leg height can be controlled by adjusting the float assembly.

There are some inherent problems in the use of float-type mud gas separators. The manual linkage separator has experienced problems with linkage failure resulting in improper opening or closing of the mud return line valve. Air-operated valves fail to function if rig air is lost, resulting in no control of fluid level within the separator. Mud-return-line valves are prone to plug with solids, preventing mud flow back to the mud pits.

Gas Flow calculation is another important issue to evaluate the mud gas separator.

Usually we need to calculate the following items.

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