Author: gnamin

Vertical submersible pump (semi-submersible) is also called submersible slurry pump, it is used to pump slurry( which content large solids) and waste water. In drilling rig mud system, it is used as 2 functions:

1 As feeding pump of shale shaker, to pump the slurry from mud pit to shale shaker inlet pipe, usually it is HDD mud system, water well drilling mud system. In oil drilling mud system, they do not need a shale shaker feed pump.

2 As feeding pump of decanter centrifuge.

In some liquid mud plant, they may use the vertical submersible pump as transfer pump.

Geothermal drilling is the process of creating boreholes in the earth to extract the earth’s heat. Basically it is similar with the other type drilling, like horizontal directional drilling, CBM drilling, water well drilling, etc. Just its treating capacity required is smaller and the separated solids is much fine. So usually they will required decanter centrifuge and shale shaker.

GNZS752 mini shale shaker is special designed for geothermal drilling rig, it can separate the solids very dry and its compact footprint help to design a compact mud system, if the operation site is not large enough. G

Cementing is one of oilfield service, It delivers engineered solutions to prepare the wellbore to receive cement. The main objectives of cementing are to seal the annulus (the space between the casing and the borehole) and to isolate each producing zone in the well. The cement sheath also protects the producing zone from unwanted water and gas, protects the casing from corrosion and stabilizes the wellbore.

Except for Cementing, oilfield service also includes sand control, well completion , drilling fluids service, etc. GN solids control provide complete line of drilling fluids solids control system & equipments.

See the photo right, it is a portable drilling mud cleaning system, it can be moved by a truck head, and when it is stopped, it can be put on the flat ground. From left to right, it is GNZS703 linear motion shale shaker 2 units, GNZJ703 mud cleaner, GN mixing hopper and mixing pump. This system treating capacity can be up to 500gallons/min, it can be used for horizontal direction drilling, water well drilling or drilling mud treatment in the plant.

We also provide another type portable mud cleaning system called trailer mounted mud system, which is put on the trailer.

GN independently design portable drilling mud system for HDD and water well drilling mud system, which is containerized for sea freight. Especially if your rig is truck mounted, you’d better use a trailer mounted/portable mud system, you only need a truck front to trail it from one site to another.

A 200gpm portable drilling mud system including a mini shale shaker, a mini mud cleaner, mixing hopper and mixing pump, and a 5.5m length mud tank. When you finish the project, you just need to pull off the walkway and hand rail to the side, and pull off the lights, then you can use the truck front to take it away. 

GN designed a set of drilling waste management system for cold area, like Russia. We put decanter centrifuge, vertical cutting dryer, screw pump, VFD control panel and electric control panel, intermediate mud tank inside a standard container, and add heat material inside the container to keep it warm.

The solids discharge port of decanter centrifuge and vertical cutting dryer is out of the container, they put the system on top of another tank to collect the waste cuttings. For convenient maintenance, we open 2 doors on the length side of the container, and the 2 sides of the container can be opened to remove the equipments. 

The function of mud gun in a solids control system is agitating and transferring. Usually it works together with mud agitator, the main body of mud gun is in the bottom of the tank, same with mud agitator shaft. Mud gun pipeline can be used to transfer mud from one tank to another. Its power come from mud pump pressure and jet mud mixer pressure.

Check the photo below for the mud gun, mud agitator and various pipelines in the tank bottom. The mud gun is operated by butterfly valve or gate valve installed on top of the mud tank.

We shipped 4 units of VFD decanter centrifuges to South America by sea. They are GN new designed GNLW363VFD centrifuge, with the features below:

1 Variable Frequency Drive, when you need to use fixed speed, you can turn to fixed speed button. Pressurized design to help cooling the VFD control panel during working and compact design.

2 ABB brand electrical components, comply with class I division I standard.

3 stainless steel 304 material bowl and screw

4 Screw protected by tungsten carbide tiles, and have spare tiles

The new design improved the quality a lot compared with the old design.

There are a lot of mud tanks in drilling rig solids control system, during operation, some slurry with oil will deposit in the tank bottom. How to clean the mud tank become a problem, tank cleaning takes time and cost a lot.

To clean mud tank, firstly you should improve the agitating performance of the mud agitator to less the sediment;secondly, you can use a pitgun to carry out this process remotely, operators and rig owners no longer need to have personnel enter mud pits or tanks to manually break up compacted solids that build up on the floor, beneath pipework, and in tank corners during the drilling process.

GNLW453 centrifuge is GN standard 300gpm centrifuge with 17 inch bowl, bowl length 62 inch. Except for 200gpm centrifuge, we also have standard 14inch bowl centrifuge, 350gpm centrifuge , 400gpm centrifuge( 21inch bowl).

GN 300gpm centrifuge is designed for un-weighted drilling fluids processing, , max bowl speed can reach 3500r/min and 3000G maximum. By changing pulleys, you can get 2 different speed in different conditions.