Workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing. More specifically though, it will refer to the expensive process of pulling and replacing a completion.

workover parts

Workover Rig is available for both onshore as well as offshore. Before any workover, the well must first be killed. Since workovers are long planned in advance, there would be much time to plan the well kill and so the reverse circulation would be common. The intense nature of this operation often requires no less than the capabilities of a drilling rig.

Workover parts may include the following parts basically:

Workover rig, Manifold, triplex mud pump, mud system, BOP, Top drives, Blow out preventers.

Workover mud system:

GN solids control produced workover mud system for 250HP, 350HP, 450HP, 550HP, 650HP,750HP workover rigs. They have been applied in more than 60 countries in the world. Some clients may get the mud system from rig package supplier. But a much sane choice is to buy the mud system separately from solid scontrol Continue reading →

GN solids control provide solution for oilfield drilling waste disposal.

Oil and gas wells cannot be drilled without creating waste. However, with good waste management practices, the amount of waste can be reduced. By far, the greatest volume of waste generated in the drilling process is drilled cuttings. The first step is to use good solids control equipment, such as the GN linear motion shale shaker, mud cleaner, and decanter centrifuges.

When operated properly, the solids control equipment removes drilled solids from the mud, maintaining the rheology and thereby decreasing the need for dilution. Good solids control equipmentoperated properly also yields drier solids. Both decreased dilution and drier solids reduces waste and increase profits for the operator.

Vertical cutting dryer

The second step is to use good drilling waste treatment equipments, like GN hi-G shaker or vertical cutting dryer, big bowl big volume decanter centrifuge, drilling waste collection box, dewatering unit etc. NOV Brandt called vertical cutting dryer “Vortex dryer”, there is also horizontal dryer.

NOV Brandt vortex dryer V.S. GN CD930 cutting dryer Continue reading →

What is slurry pump?

A Slurry pump is a type of centrifugal pump in physics principle that increases the pressure of liquid and solid particle mixture, through centrifugal force (a rotating impeller) and converts electrical energy into slurry potential and kinetic energy.

slurry pump

There are 2 kinds of slurry pump, horizontal type and vertical type, for vertical type pump, there are submersible slurry pump and underwater pump. Submersible slurry pump is widely used for drilling fluids transferring, underwater pump is used for fluids transfer. Horizontal slurry pump is also used for drilling slurry transfer, just the installation method is different to meet different mud tank size.

What is vertical slurry pump?

Vertical slurry Pump is the cantilever pump structure of single stage and single suction, with the bearing housing, supporting, intermediate pipe connecting the pump hydraulic components, the water is discharged out from the drain pipe parts, pump impeller is for semi-shrouded with the agitating vane on the vane extended, the main characteristic of this pump is the underwater pump shaft parts have enough rigidity, the impeller and pump shell have no bearings, no shaft seal, which can transport the greater medium of solid particles. The length of inserting the water by pump is between 800 and 2000, the suction pipe can be matched in case of need. Continue reading →

GN designed and produce a complete set of 10000feet drilling mud system, it is around 3000m dept and horse power 750HP. It including 4 mud tanks,recycling tank, active tank, mixing tank, mixing skid. It is a customized system according to client’s isea.

Technical specification of 10000 feet drilling mud system:

10000ft drilling mud system

1)      Recycling Tank (40feet Container Size) with 2 GNPS703 Shale Shaker,1GNZJ703 Mud Cleaner with 2x10inch Desander cones,12x4inch Desilter cones,and as well as desander desilter feeding centrifugal pump SB8x6-13(55Kw).And one trip pump for the trip compartment.

2)      Active Tank(40Feet Container Size) with Mud Agitators and Mud Guns.

3)      Mixing Skid(20feet container size) with 2 mud hopper, One SB8x6-13(55KW) Centrifugal Pump and one shear pump.

4)      Mixing Tank(40feet container size) with one SB8x6-13(55Kw) mixing pump and one mud hopper, completed with mud agitators and mud guns.

Usually clients will buy 10000ft drilling rig from USA, so the electricity is 460V60HZ, 480V/60HZ, GN drilling mud system can meet their electricity rate. And our explosion proof mark of the electric control system is class1, div 1. As a part of the land rig of 10000ft, our drilling mud system including pipelines from shale shaker inlet to outlet of mud pump charging pump, including mixing pipeline, water pipeline, mud gun pipeline, overflow line, suction line,etc. Also we provide mud gas separator installed on the trip tank( if the mud system has a separate trip tank.) In this 10000 feet drilling mud system, their trip tank is in the 1^st recycling tank, they have a trip compartment with trip pump.

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Brandt HS-3400 centrifuge is used to process unweighted and weighted, water-based and oil based drilling fluids(mud). Here we made a comparison between Brandt HS-3400 centrifuge and GNLW363VFD centrifuge.

GNLW363VFD decanter centrifuge

What is the difference and specs in common?

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GN desander, desilter have standard frame for hydrocyclones. This made our design, production high efficiently. For desander, we have standard GN1S with treating capacity 500gpm, GN2S with treating capacity 1000gpm, GN3S with treating capacity 1500gpm. For desilter, we have standard GN8N with treating capacity 500gpm, GN12N with capacity 1000gpm, GN16N with capacity 1500gpm. If you required large quantity, we can make other hydrocyclone qty according to your required treating capacity. Desander, desilter has no underflow shaker.

mud conditioner

Mud conditioner also called mud cleaner, some times we called desander, desilter, shale shaker 3 in 1. Also for mud cleaner, we have standard 500gpm, 1000gpm, 1500gpm mud cleaner with optional linear motion shaker or balanced elliptical motion shaker. Compared with separate desander, desilter, mud conditioner have the following advantages:

1 With larger shale shaker, can process mud better and recovery more drilling mud to save drilling cost.

2 Save space, you only need to place one machine which can do the job for 3 machines together.

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GN solids control is one of the most professional drilling mud system manufacturer. GN offers a variety of drilling mud sytsem to fit your need in oil & gas drilling, water well drilling, horizontal directional drilling, geothermal well drilling, Coal bed methane, drilling waste management, etc. We can be your first line supplier for all of your drilling needs.

The working principle of most of drilling mud system is to separate large solids or cuttings to recycle the drilling mud. A common drilling mud system will include shale shaker, desander, mud cleaner, decanter centrifuge, mud agitator, centrifugal pump, mud gun, mud tank with accessories. Sometimes we will reduce some equipments according to the drilling mud condition.

drilling mud system

What kind of drilling mud system we offer?

By transportation method:

Skid mounted mud tank system( common) and trailer mounted

By processing rate:

200gpm, 350gpm, 500gpm, 800gpm, 1000gpm, 1400gom mud system

By application:

Oil& gas drilling mud system, HDD mud system, CBM mud system, drilling waste management system

We provide technical support, layout drawing and flow process drawing, welcome to contact us for drilling mud system.

What is dredging?

Dredgingis an excavation activity or operation usually carried out at least partly underwater, in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location.

dredging Slurry Separation System

A dredge is a device for scraping or sucking the seabed, used for dredging. A dredger is a ship or boat equipped with a dredge.

The process of dredging creates spoils (excess material), which are carried away from the dredged area. Dredging can produce materials for land reclamation or other purposes (usually construction-related).

GN 1000gpm Dredging slurry separation system:

As mentioned above, dredging will creates excess material, for example. Stones, sand, masses,cuttings, etc, For the purpose of environment protection, we need to separate the real trash and get the usable material for construction-related industry. GN dredging slurry separation system(also called dredging dewatering system) will be a good unit for such application. GN standard 1000gpm DSS system has been widely used for dredging.in domestic and abroad. If you need a 2000gpm DSS system,we suggest you to buy 2 sets of 1000gpm unit, it is convenient to ship it by container and truck on the road.

1000gpm DSS: total power 130KW

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GN solids control shipped 1 set of 1000HP rig solid control equipments to India. These equipments are for service of ONGC( Oil and Natural Gas Corporation Limited ). It is an Indian state-owned oil and gas company headquartered in New Delhi, India. It is one of the largest Asia-based oil and gas exploration and production companies, and produces around 77% of India’s total crude oil production .ONGC is one of the largest publicly traded companies by market capitalization in India and the largest India-based company measured by profits.

solid control equipments for ONGC

The 1000HP rig solid control equipments including tandem shale shaker with flow divider and jet water cleaner(to clean shaker screens), desander, desilter,  jet mud mixer( hopper assembly), mud agitator, vacuum degasser, centrifugal pump, with one year spare parts for the above equipments. All the motor needs to be DGMS approved, also the control panel. They make mud tank in India to reduce freight cost and production cost.

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When to use a centrifugal or a Positive Displacement pump (“PD Pump”) is not always a clear choice. Usually we use a positive displacement pump to feed for decanter centrifuge, it is called single screw pump.

The major benefit to use a positive displacement pump other than centrifugal pumpis that, it will not break the fine solids to smaller, so the centrifuge can separate the solids easily. Centrifugal force of centrifugal pump will cut the solids to smaller, it is not good for centrifuge’s operation.

positive displacement pump for centrifuge

How to operate a screw pump when feeding to decanter centrifuge?

1 Full fill the pump chamber with drilling fluids , if the media is too viscosity, then inject into other liquids; Inject the mud from the pump inlet connection, and rotate the pump by hand along the running direction of the motor to make the mud full fill the suction chamber.

2 Open the screw pump inlet valve and outlet valve (the valve is fully opened to prevent overload or no load suction), start the motor.

3 The pump should be started under the condition of fully opening the Inhale row valve and bypass valve to minimize the start load. Gradually close the bypass valve after the motor reaching the rated revolution.

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