drilling fluids

Shear pump is a kind of centrifugal pump no need safety valve at outlet. Below is reasons explained from function and pressure source.

Explain on Functions to confirm shear pump no need safety valve

Shear pump is a kind of centrifugal pump. Drilling mud get a certain amount of kinetic energy while leaving impeller under the impeller rotating centrifugal force. Mud also get some certain of pressure in the pump housing, the pressure does not vary with the change of time, pump outlet size, but only depends on impeller structure, size, and rotating speed. As the pressure at shear pump outlet is not vary per pump flow or working condition. It is no need to match safety valve.

Explain on pressure to confirm shear pump no need safety valve

Driving motor and shear pump connected directly with belt. Design speed of impeller is 2200RPM (max.). Under normal working situation, like for 60hz motor, max. speed of shear pump impeller is 1800rpm, much smaller than the design speed. The maximum pressure generated from high speed rotating of impeller centrifugal force is constant. The max. shear pump pressure is 0.47MPa. The outlet pipeline and pump casing can surely withstand the pressure. In this case, it is no need to match safety valve.

Even in the case of the outlet is blacked or the valve is closed, pressure generated from the impeller rotating is larger than pump outlet, drilling mud cannot be discharged, and circulated within pump housing under the rotating force of impeller. If the outlet is blacked or the valve is closed, and mud circulated within the pump housing for a long time, the worst condition is to increase the temperature of pump housing in some degree. The pump pressure will not increase. Therefore, it is no need for mounting safety valve in shear pump outlet pipe.

Drilling waste high G dryer shaker is a special kind of shale shaker. It utilizes high G force mainly used to treat drilling waste cuttings.
Why it is called high G dryer shaker, what is the difference of high G dryer shaker with solids control shale shaker?

Yes, indeed high G dryer shale shaker is a kind of shaker. The difference of high G dryer shale shaker and solids control shale shaker as below:
1) G force different: High G dryer shale shaker may utilize G force around 8.0G during separate the drilling waste cuttings, while solids control shale shaker utilize 6.5G ~ 7G during working. The design and application G force different.
2) Feed type different: High G dryer shaker, it is used to treat drilling cuttings from solids control screen panel (shale shaker, desander, desilter). The cuttings transferred through screw conveyor auger to the high G dryer shaker. In this case, dryer usually is with hopper feeder. While solids control shale shaker is usually with box feeder or weir feeder.
3) As the dryer shaker G force is bigger then solids control shale shaker, in request a strong design for the shaker deck.
In which conditions high G dryer shaker can be used?
1) It is specialized for water based mud drilling cuttings separation. Followed with a high speed centrifuge for LGS. to separate the fine solids.
2) It can be used for oil based mud drilling cuttings separation, as the alternative of vertical cuttings dryer (Vortex G). But is cannot separate oil based cuttings as dryer as vertical cuttings dryer.
How can customer get fast delivery in case urgent?
GN always have high G dryer shaker and solids control shaker in stock in China factory and Houston warehouse.  


1500HP land drilling rig usually match 2000bbls mud system. The mud system will have complete full 4 stages solids control equipment and with 5 steps separation process.


Equipment included in 1500 hp land drilling rig mud system:

1) First stage solids control – Shale shaker GNZS594E / GNZS703E linear motion, 3 each

2) The second & third stage solids control – Mud cleaner GNZJ594E-3S-16N / GNZJ703E-3S16N, 1 each

3) Vacuum degasser GNZCQ360 to remove gas from drilling mud before enters into mud cleaner desander / desilter cone.


4) The fourth stage solids control – Decanter centrifuge, 2 each

 One decanter centrifuge GNLW452S in middle speed for barite recovery.

 Another decanter centrifuge GNLW363 in high speed to separate the low gravity mud.

5) Jet mud mixing & shearing mixing system, with GN high efficiency centrifugal pump and shear pump for chemical shearing and mixing.

6) 7 each Mud tanks: shale shaker tank, decanter centrifuge tank, suction tank, mixing tank, shearing tank, storage tank 1 or 2 each

Above is the standard 2000bbls mud system for 1500 hp land drilling rigs. GN Solids Control can make customized mud system per user’s special requirements. If you need more information of other size land drilling rig mud system, you can visit GN website or send mail to vivi@gnsolidscontrol.com

Centrifuge dewatering unit is a kind of equipment for biosolids management to thickening and flocculation of very fine solids on drilling fluids.

Thickening and dewatering are important components of biosolids management programs. The proper solids concentration is critical in stabilization processes from aerobic digestion to advanced alkaline stabilization. The recent advances in solids thickening and dewatering have increased performance and capture rates while often reducing chemical and polymer consumption, electrical usage, space requirements and odor potential. In addition, automation has reduced the degree of operator attention required, further reducing the cost of operation.