This week GN shipped several sets of stainless steel mud agitators to Algeria. Normally our agitator material is carbon steel, but sometimes we can make customized equipments, such as customized shaft length, impeller diameter, impeller thickness, material, etc.

A mud agitator is used in surface mud systems to suspend solids and maintain homogeneous mixture throughout the system. A mechanical agitator is driven by an explosion-proof motor, coupled to a gear box that drives the impeller shaft. The impellers (turbines) transform mechanical power into fluid circulation or agitation. The objective is to obtain a uniform suspension of all solids.

mud agitator

Mud agitator can be divided into horizontal mounted agitator and vertical mounted agitator according to mounting method.

Types of Impeller Blades

• Flat blade impeller
• Canted blade impeller
• Contour blade impeller

Derrick mud agitator

All Derrick agitators feature a “C” face motor coupled to a rugged oilfield gearbox, which

eliminates misalignment and troublesome couplings. This configuration promotes longer motor and gearbox bearing life. Derrick uses a Helical-Bevel gear unit to turn the impeller.

This highly efficient gearbox offers a 95% power transfer, which is approximately 30% more than a worm drive gearbox. Helical-Bevel gearboxes are preferred over worm gear arrangements because of their power efficiency, reliability, and lower operating temperatures.

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replacement shaker screen for Derrick shaker screen

GN can produce the following replacement shaker screens1 Derrick FLC500

2 Derrick FLC2000

3 Brandt Cobra Family

4 Brandt VSM300

5 MI-Swaco Mongoose PT

6 Swaco ALS

7 Fluids System (FSI)

8 Kem-tron 

…and more

 GN Booth No.: 54C (TENDA 3)

Exhibition date: 14^th to 17^th June 2011

Conference Location: Macaé centro , Macaé Brazil 

 Macaéis a city located in the Brazilian state of Rio de Janeiro, 180 km northeast of the state capital. Macaé is generally considered to be the centre of the Brazilian offshore petroleum industry. As a consequence it is often referred to as “Cidade do Petróleo” (“City of Petroleum”). The Brazilian state-controlled oil company – Petrobras – has many facilities within the town.

 Conference introduction:

Brasil Offshore is the biennial conference & exhibition for the Brazilian Offshore Oil & Gas Industry. Held in Macaé, which is the operational base and accounts for over 80% of Brazil’s offshore exploration, the event attracted a global audience of over 49,000 professionals and 636 exhibitors in 2009.

replacement shaker screen for Swaco shaker screen

Who attend Brazil Offshore Conference 2011?

The scope of exhibitors at Brasil Offshore stands out for its diversity: manufacturers, importers, distributors and suppliers of a wide range of products and services related to the oil & gas offshore industry.

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GN solids control can design and manufacture the complete line of drilling waste management system, including shale shaker, high G dryer, vertical cutting dryer, decanter centrifuge, screw pump, etc equipments.

The first step for drilling waste management is to separate the solids cutting from the liquid drilling mud. Once solid and liquid drilling waste have been separated, companies can use a variety of technologies and practices to manage the wastes. For some applications, drilling wastes are solidified or stabilized prior to their ultimate management practice. The management technologies and practices can be grouped into three major categories: waste minimization, recycle/reuse, and disposal.

drilling waste management centrifuge

Function of waste minimization

 It can reduce volume or impacts of waste, including the following two aspects.

1 minimize generation of drilling waste

2 use mud and additives with lower environmental impacts

Function of recycle/reuse

 1 recycling mud

 2 roadspreading

 3 reuse of cutting for construction purpose

 4 restoration of wetlands using cuttings

 5 use of Oily cutting as fuel

 How to disposal?

 1 discharge to Ocean

 2 slurry injection

 3 onsite burial (pits,landfills)

Drilling waste management decanter centrifuge

GN solids control can produce 3 models decanter centrifuge for drilling waste management system.

1 Middle speed centrifuge LWF450x1000N

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GN solids control has designed and produced many Liquid mud plant, and we can produce all the equipments for liquid mud plant, such as jet mud mixer, mixing hopper, centrifugal pump, decanter centrifuge, mud agitator, mud gun, mud mixing tank, pipeline system, electric control panel, etc.

Following is a proposal for a liquid mud plant for Brazil client. It has the following advantages.

liquid mud plant in Brazil

1 Mud Storage tank 6 sets, total 360m3(87176 US gallons)

2 11KW mud agitator, 3 sets for each storage tank , 2 sets for centrifuge tank

3 Mud gun NJQ50-3, 2 sets for each storage tank, Function1 : to agitate mud , Function2: to transfer mud

4 Centrifuge tank, Active capacity: 30m3

5 Middle speed centrifuge LW450x1000N, the function is to Clean drilling fluids,

Separated cut point: 5~7μm, treating capacity 50m3/h

6 Screw pump, it can pump mud from each tank to centrifuge for cleaning, after processing, they can flow to any tank through pipelines

7 Jet mud mixer SLH150-50 on separate skid (hopper+mixing pump)

The function is to prepare and weight drilling mud

1 )Unit capacity: 240m3/h, unit mixing speed: 100kg/min

2) #1 and #2 jet mud mixer can work separately, also can work at the same time

3) The mixing pump also can be used as transfer pump, to pump mud from one tank to another, or to other tanks out of this plant

4) Mixing pump can mix or prepare mud for any tank in this plant

8 Tank accessories, like walkway, hand rail, clean gate, man hole, stairs, etc

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GN solids control produced various kinds of mud tanks for oilfield drilling and water well drilling, including swab tank, storage tank, fuel tank, water tank, mixing tank, suction tank, pill tank, trip tank, mixing tank, intermediate tank, shaker tank etc.

General features of GN mud tanks

oilfield swab tank

1 Customized dimension

2. Sand Blast Treatment before painting.                                                                                            

 3. Two pack Epoxy zinc(Japan Kansai & Cosco brand)                                                                                    

4. Two Pack Epoxy hi-build containing anticorrosive pigmentstwice.                       

5. Surface pigmented with high quality light fast PU pigments

6 Stainless steel material tank available

7 Skid Mounted 3 Runner Oilfield Design

8 Proper mud agitator and mud guns are available

9 Mud tank accessories included

Oilfield Swab tank

Also called test tank, each plumbed for separate discharge to vacuum truck or water tank. Complete with minimum 32 ” Poor-Boy Degasser with proper vent, fluid leg and inspection hatch. Usually we will provide a complete sets of measurement tools, including Mud Balance, Plastic Marsh Funnel Viscometer and Plastic Measuring Cup and Stopwatch.

Oilfield trip tank

A small mud tank with a capacity of 10 to 15 barrels, usually with 1-barrel or h-barrel divisions, used to ascertain the amount of mud necessary to keep the wellbore full with the exact amount of mud that is displaced by drill pipe. When the bit comes out of the hole, a volume of mud equal to that which the drill pipe occupied while in the hole must be pumped into the hole to replace the pipe. when the bit goes back in the hole, the drill pipe displaces a certain amount of mud, and a trip tank can be used again to keep track of this volume.

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Oilfield drilling policy in Latin American

 1 Brazil

Brazilian oil deposits below a layer of salt in the Atlantic Ocean hold at least 123 billion barrels of reserves, more than double government estimates, according to a university study by a former Petroleo Brasileiro SA geologist.

oilfield drilling equipments

 2 ColombiaColombia is currently one of the friendliest South American countries in terms of oil and gas regulations and royalties.

 In 2003, Colombia’s National Agency for Hydrocarbons (ANH) created a new energy policy, the state-owned hydrocarbon company, to compete with other oil and gas companies for exploration and production contracts.The new policy also allows private companies such benefits as 100% ownership upon exploration success.

 3 Ecuador

Ecuador produces more oil than it needs for domestic consumption and thus it is one of the country’s leading exports. Therefore, any new drilling for oil is not intended to meet local demand but is intended for export overseas, most likely to Japan and the United States.  Beneath the surface in eastern Ecuador and within the Amazon rain forest, are large amounts of oil.  Critics warn that the habitat could suffer either through the direct spilling of product and soil contamination or through the opening of the area to the outside through the building of roads.

 Due to the drilling activities in Latin American, environment protection should be on the way right now. A plenty of drilling mud recycling system and drilling waste treatment system are urgently demand.

 GN solids control provide various of drilling equipments and drilling mud recycling system for oilfield.

Advantages of using drilling mud equipments in oilfield

1 recycling drilling mud to used for drilling rig, it can save considerable drilling cost

2 Environment protection

 After treated by drilling mud equipments, the solids can be trucked away, some are used for construction landfill, some are used to Brick production

3 recycling barite

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offshore drilling

GN solids control produce mud recycling system/circulation system for both land rig(onshore drilling) and offshore drilling.

What is offshore drilling?

Offshore drilling is one of the greatest technological breakthroughs in recent decades, and many new techniques have been developed to profit from the abundance of oil underneath the ocean floor. While drilling for oil has been around for hundreds of years in one form or the another, the effective extraction of petroleum from beneath the sea floor did not surface until the last forty years. The search for oil often turns out to be unproductive, but this practice is vital for the economic future of many nations.

List of the top offshore drilling service companies

1 Transocean-the world’s largest offshore well services drilling company

Largest offshore driller with 165 mobile offshore drilling and production units, inland drilling barges and supporting assets.
– Largest “floating” rig driller with more than 60 semisubmersibles and drillships.
– Largest deepwater driller with almost 40 units that can drill in more than 2,000 feet of water.
– Largest shallow-water driller with 54 jackups, including the largest jackup fleet in the U.S. Gulf of Mexico with 27units.
– Largest inland drilling barge driller with more than 30 units.
– Largest offshore driller in market equity capitalization.

land rig drilling service

2 Baker Hughes Inc-consultancy and engineering in oilfield drilling services
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GN decanter centrifuges are widely used in complete drilling fluids recycling system, work together with cutting dryer. Such drilling fluids circulation system is widely used in Venezuela and other South American countries.

 Venezuela’s proven oil reserves are among the top ten in the world. Today, Venezuela is the fifth largest oil exporting country in the world with the second-largest reserves of heavy crude oil (after Canada).

drilling fluids decanter centrifuge

 There is big demand of oilfield drilling mud system/solids control system in Venezuela. Before they mainly purchased the drilling mud system from USA . But now more and more clients realize that they can purchase rig packages from China, although the delivery time and transportation will be longer and complicated, they can save a considerable drilling cost.

A complete drilling fluids circulation system including shale shaker, mud cleaner( or separate desander, desilter), screw conveyer , Cutting dryer, recycling mud tank, decanter centrifuge(with feeding pump), drilling mud reserve tank/storage tank, etc.

After processed by cutting dryer, the large drilling cuttings have been separated out, the drilling fluids flows to recycling tank or to decanter centrifuge through screw pump. Since decanter centrifuge has higher separation factor than cutting dryer, it can separate fine particles from the drilling fluids and recycling barite to keep the drilling fluids balance.

GN decanter centrifuge features:

1  Stainless steel cover    

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Last week GN solids control attend 11^th CIPPE held in Beijing on 22th, March. To some extent, it is a successful oil show, Many professional manufacturers of drilling rig, drilling tools, drilling fluids solids control system/mud circulation system, and accessories, etc in China attend the fair.

 Although GN booth is not located in visible place of the exhibition center, we also have a lot of esteemed clients here.

GN mud circulation system

 What is the features of GN mud circulation system?

1 It consists of GN new designed BEM shaker, GNZJ703 mud cleaner, LW450x1000N decanter centrifuge, mixing hopper and mixing pump, the complete electric control panel and tank accessories( stairs, handrails, slide walkways, mud pipeline, clean gate, etc)

 2 Process of GN mud circulation system

  First, drilling mud is flowed into the buffer box of the shale shaker through mud divided equipments, then entered the 2 sets of BEM shale shaker, after treated drilling mud flowed into shaker compartment, which is sand trap designed.

  #1 centrifugal pump feeds the mud from shaker compartment to desander cone of mud cleaner, then the clean mud droped into desander compartment;

  #2 centrifugal pump feeds the mud from desander compartment to desilter cone, then the clean mud droped into desilter compartment.

   The submersible slurry pump feeds the mud from desilter compartment to the centrifuge, to separate solids particle size 2~5μm. Now the clean mud can be used directly for drilling through pipelines, or weighten by mixing hopper. After weighten drilling fluids, they can be recycled and re-used in the drilling operations.

 3 Features of main equipments of mud circulation system

  3.1 GN BEM shaker features

1 adopts ANSYS limited element analysis

2 Adopt SS304 or Q345 high strength alloy material

3 Heat treatment on complete shaker deck

4 shaker surface is coated with heavy anticorrosive paint

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GN solids control design and manufacture a complete solids control system/drilling mud system for oil & gas drilling, now we need a mud cooling system in our design, to make it more user-friendly. Usually we call the mud cooling system as mud cooler.

Application of mud cooling system

Scomi Oiltools Mud Cooling System

• Oil, Gas, Geothermal Drilling – cooling drilling fluids
• Oil and Gas Refineries – gas cooling/condensing
• Petro-Chemical – steam condensing
• Power Generation – fluid cooling
• Steel – waste water cooling

In Oil, Gas, Geothermal Drilling ,the Mud Cooling system is used to reduce the temperature of drilling fluid returned to the surface.

In HT / HP wells the temperature of the drilling fluid must be strictly controlled to keep it’s properties within the specified parameters for that particular well. If the temperature of the drilling fluid is allowed to increase then a variety of problems can occur such as high equivalent circulating density (ECD), formation breakdown, lost circulation, packing off, stuck pipe and evaporation of the oil and water phase.

Why use mud cooler?

1 crew safety

2 Reduction of mud temperature in return lines especially important in Oil based systems to be maintained below flash point.

3 reduction of mud temperature reduces the risk of fire, blowouts, and helps provide safer drilling operation/ environment.

Benefits to well, drilling fluids, downhole equipment

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