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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GN solids control has designed and exported many sets of 1000HP land rig solids control system to worldwide clients for oilfield drilling, we have many existing design for their different requirement. Several clients called it “mud handling system”, “mud tank system”.

GN 1000HP land rig solids control system is including the following equipments:

1 Linear motion shale shaker or BEM shaker 2 sets, they can be made of dual tandem shaker

2 vacuum degasser with 1200gpm or 1600gpm treating capacity

1000HP land rig solids control system

3 Linear motion or BEM mud cleaner with 55KW centrifugal pump

4 high speed decanter centrifuge 1 set or middle speed decanter centrifuge 1 set, depends on budget

5 Twin Jet mixing unit with 2pcs mixing pump, max mixing rate can reach 200kg/min if they work at the same time

6 poor boy degasser with 1000gpm flow rate

7 Flare ignition device

8 Mud tanks: including shaker tank, settling tank, suction tank & reserve tank, water tank, fire tank, pill tank, trip tank, etc.

9 A complete set of electric control system, explosion proof grade IP56, other electric specs and explosion proof class are available.

Once we get the rig layout, we can arrange for the layout of mud tank system and submit process flow drawing and layout drawing of the solids control system. Our design may take the following aspects into consideration.

1 waste solids discharge: we will try our best to simple the solids discharge operation, and save land area of solids discharge, sometimes a screw conveyor is applied to keep the mud system in compact structure and convenience solids discharge.

2 transportation convenience:

 All the handrail and walkway are foldable and can be moved together with tank body, you do not need to disassembly it.

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GN solids control manufacture 2” mud gun and 3” mud gun, and we have several sets of mud guns in stock.

There are 2 type of mud guns, the common one is top tank type, sometimes we design it as bottom tank type. Top tank mud gun is controlled by staff on the tank, the difference between GN mud gun and NOV mud gun is the nozzle numbers, we make to 3 nozzle numbers, which can jet more place in the tank so the agitating effect can be better.

3 inch mud gun

What is the difference between tank top and tank bottom mud gun?1 tank top mud gun

 Tank top mud gun is usually with function of agitating, together with mud agitator, they are important equipments for drilling mud tank and mud mixing tank. And how many sets of agitator you have for the mud mixing tank, usually how many mud guns you have. But it also have exception, for example, when the tank room is very small, you have no room for the agitator, and the tank is not so large, you can use a mud gun instead, it is much cheaper, needs smaller area to install and convenient to operate, also do not need to use electric power, but use pressure to work, and you do not need to buy a lot of spare parts such as gear box, bearings for the mud agitator. Anyway mud gun has a lot of advantages but it can not replace mud agitator totally, the agitating effect is not so strong as agitator. We need to use them together to benefit from both of them.

2 Tank bottom mud gun

Tank bottom mud gun also called inner tank mud gun, its function usually not agitating, but transferring and mixing line. It transfers the mud from mud mixing tank to another tank.

Where is the pressure come from ?

For high pressure mud gun, the pressure came from mud pump, for lower pressure mud gun, the pressure came from mixing pump, it can mix and transfer drilling mud to another tank.

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A good mud mixing and additive system should be a jet-shear mud mixing system, it must has three functions, shearing, jet mixing and drilling fluids additive. GN design and produce such multiple function system.

GN mud mixing and additive system

GN mud mixing and additive system can be mounted on a separate skid then connected with a mud mixing tank, or they can be mounted on the skid of the tank. The latter way is a compact structure of mud mixing unit, and the former way can be more flexible to move the mud mixing unit from one place to another. But you do not have to move it all the time, the mud mixing pipelines which is controlled by butterfly valves can reach this target, too.

Venturi hopper with a mixing pump is the most simple way for the mud mixing unit. Centrifugal pump can be replaced by shearing pump, then you call it jet-shear mud mixing system.

venturi hopper

 What is drilling mud additives?

Drilling fluid additives are specialty products that serve a specific need – and Halliburton and Baroid are known for high-quality additives that deliver the consistent performance mandated by environmental regulations. Our commitment to research and development ensures that our products and processes reflect the latest advancements in fluid additive technology.

Jet shear mud mixing systems 

Jet shear mud mixing systems are designed to use shear pump to efficiently mix solids with liquids. Jet shear systems ensure efficient and mixing of soluble polymers and bentonite used in water-based drilling fluids, therefore eliminating “fish eyes”. Drilling fluid yield and gel strength properties are instantly obtained with hydraulic shearing of bentonite or organophilic clays.

The addition of liquid additives is made easy with the incorporation of an injection port into the jet pump. This port is capable of handling liquid additives such as; lubricants, polyacrylamides, and oil-wetting emulsifiers. By incorporating an in-line mixer, the operator is given the choice of imparting low shear into the drilling mud. When the appropriate level of mixing is imparted into the drilling mud, polymers are efficiently used, therefore lowering additive costs.

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GN solids control design and manufacture complete line of oilfield solids control system, we have provided several sets of solids control system for drilling rig ZJ20, ZJ30, ZJ40, ZJ50 & ZJ70 to many clients in the world.

We also recommend manufacture list in China for oilfield related equipments, such as drilling rig, mud pump, drilling mud chemicals, well control equipments, drill tools, etc.

BOP

Well control equipments manufacture in China

1 Shanghai SK Petroleum & Chemical Equipment Corporation Ltd

The main products of the company include mud logging unit, drilling apparatus, blow-out preventer (BOP) and control system, wellhead & charismas tree, analyzing apparatus for petroleum products, production logging apparatus, logging service, etc..

 2 Rongsheng Machinery Manufacture Ltd.

Main products are BOP series, Tool Joint series, Tubing series, Pumping Unit series, Filter series, Sucker Pump series almost 200 types.

It has passed the certification of ISO9001, and established a completed HSE management system. Main products have got API licenses.

 3 Yancheng Sanyi Petrochemical Machinery Co., Ltd.

It has been approved ISO 9001 certificate of quality and Licensed by the API Monogram Progarm for Spec 6A,Spec 6D,spec 16C,Spec 16A,spec 7.

 The main products are high and medium pressure valves,of which main technical parameters are PN2.5-105MPa nominal pressure and DN3-500mm nominal size,and such products specially used in oil fields as wellhead and X’mas tree assembly,casing head,choke and kill manifold,mud manifold, etc

 4 Baoji Oilfield Machinery Co., Ltd (BOMCO), former Baoji Petroleum Machinery

BOMCO mainly manufactures land and offshore drilling rigs ranging from 1000 to 12000 meters, F-series mud pumps ranging from 500-2200HP, well control and well head equipment, and special vehicles, etc, totally more than 50 kinds, more than 1000 types of petroleum drilling and production equipment and components.

 For more well control manufactures in China and oilfield solid control equipments, pls control GN solids control.

Repairing an oil well sometimes requires a workover. It is commonly called by several names such as completion rig, workover rig, or pulling unit.

 Function of workover rig 

workover rig equipments and material

In many cases, workover implies the removal and replacement of the production tubing string after the well has been killed and a workover rig has been placed on location. Through-tubing workover operations, using coiled tubing, snubbing or slickline equipment, are routinely conducted to complete treatments or well service activities that avoid a full workover where the tubing is removed. This operation saves considerable time and expense.

 Companies that supply this type of equipment are Key Energy Services, Pool Workover Services, and Basic Well Services.

 Of all the problems that can occur during production, three stand out the most: equipment failure, wellbore problems, and saltwater disposal.

 WELLBORE PROBLEMS

 Sanding, formation damage, paraffin accumulation, oil-water emulsions, and corrosion are common wellbore problems.

 GN workover rig solids control system is mainly used for sanding problem. The system can separate large particles sand from the drilling fluids so the drilling mud can be recycled for drilling and “kill”the well. The working principle is to clean the drilling mud by 4 phase cleaning, they are shale shaker, desander, desilter, decanter centrifuge. But usually for workover operation, sometimes you can use a shale shaker and centrifuge only, because the sand size is not so large, but it needs to separate finer particles than oil& gas drilling.

 Sanding Problem

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When you built a mud tank, you may need a lot of mud tank accessories, such as mud tank union, fittings, valves, connectors, flanges, pipes, etc.

Mud tank unions

mud tank union

Mud tank unions have been used for years in petroleum solids control systems around oilfield drilling rigs all over the world.  Drilling mud fluid systems connecting the steel tanks to the pumps need leak proof and quickly detachable connections for large diameter pipe 4” to 16”.

There are basically two types of unions used.  The air type with the tube being aired up seals the pipe.  The other type is a large solid o-ring which locks down on the O.D. of the pipe as the hammer nut is tightened.

Air union is also called pneumatic union, since GN do not use such union in the mud tank design, we would like to introduce hammer union mainly.

Hammer union

Hammer unions are one of the most common “quick connection” methods used in the oilfield for joining together components in a temporary pipe work system. They also have expanding applications in fixed installations and also for industrial purposes.

A hammer union comprises a thread end, a nut end and a hammer nut which, when cinched up, compresses a composite seal assembly thereby preventing leakage. The seal assembly comprises a metal insert of a size to pass into the seal groove of conventional hammer unions and a small seal acting between the insert, the thread end and the nut end. The small seal is conveniently an O-ring and is of a size that is compressed when the seal assembly is inserted into the thread end of the hammer union, thereby preventing the seal assembly from falling out of the threaded end when it is inverted.

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“in the last 18 months alone theirs been 12, 100/150 ton rigs sold, and not one customer has purchased a recycling system, this is where we want to target both, here the drilling rig mud recycling system needs to be changed slightly”, a client said so. It tells the truth, Only hundreds of rigs are sold, but no mud recycling system were paid more attention, people should consider more factors of environment protection, and recycle the used mud and clean them, so they can be used again for the drilling rig.

GN200gpm mud recycling system has been approved by many HDD clients, with proper treating capacity and small land required, the complete sketch is suitable for a 40 feet container, economic in transportation and easy removed. With all these advantages, it has been the most favorate mud recycling system this year, it can handle all the treating capacity requirement smaller or equal to 200gpm. For larger treating capacity, we have GN400gpm, GN500gpm, GN1000gpm, GN1400gpm for your choice.

GN200 GPM Mud System

Recently we are studying the mobile mud recycling system(portable mud tank) with a trailor, you do not need to remove any equipments but only need a.headstock to transport it from one site to another, it is very convenient. Just like Kem-tron. We are going to public the new designed mobile mud system in 11^th CIPPE, and would like to learn from the client’s suggestion to improve it. We have a strong R&D team, they focus on how to improve the technique, and study new equipments, at present, we have already more than 10 models shale shaker available, linear motion , BEM shaker, single deck or double deck, 3 screen panels or 4 screen panels, various treating capacity, even long vibrating motor or short vibrating motor, you have most choice in GN.

A portable drilling mud system includes a mud tank mounted on an over-the-road semi-trailer having an engine driven circulating pump mounted onboard and adapted to withdraw mud from the tank for circulation to the well and for recirculation through a set of mud agitating nozzles disposed in the bottom of the tank. A mud degassing vessel, a solids separator unit and an additive blending unit are all mounted above the tank. The degassing vessel is supported by hydraulic cylinder actuators for movement between a retracted transport position and a vertically elevated working position.

Mobile mud systems are designed with a wheeled undercarriage that allows improved maneuverability for all drilling rig components. GN mobile systems reduce drilling rig-up, down time, and help customers reduce drilling costs.

GN designed a new patent linear motion shale shaker, GNZS70-3B. It is designed to replace the previous model GNZS70-3 shale shaker, which is found not so economic and practical before.

 Specification of GNZS70-3B shale shaker

1 Vibrating mode: Linear motion

2 Single deck shaker with 3 screen panels

shale shaker

3 Quick lock( wedge technology operation), which enables screen panel replacement in less than one minute. In drilling site operation, time is more important than money, so easy operation of screen replacement is necessary. It enables for an easy ratchet-type installation of the wedges, which eliminates hammer damage to the screens, as well as the paint on the sidewall of the shaker basket. You do not need any tensioning bolts or system, which can provide a small parts inventory, thus enabling cost savings to be realized.

4 Adjustable while drilling (AWD) mechanism enable faster and easier deck angle changes., adjusment from1 degree down hill to .5 degree up hill.

5 Weir height: Until now we still can not provide operational weir height, the weir height of previous model is 900mm, and for the new designed model is 750mm.

6 Available screen types, PWP(flat panel) and PMD(pyramid screen)

7 Available screen area: 29.6m2

8 Feeding method: optional from back or from top tank

9 Treating capacity: 600gpm

10 Vibrating motor: Italy Oli brand vibrating motor, explosion proof, 220V/380V 50HZ or 230V/460V, 60HZ， 3phase, protection class IP55.

11 With standard screen underflow sump

12 High G force, max 7.5G, and it is adjustable

13 All the link bolts are SS304 material

14 ISO and API certified

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