Tag Archives: Shear pump
Features of DCJQB Series Shear Pumps
The DCJQB series shear pump offers an economical and compact method of shearing polymers into the fluid stream. When properly sheared, polymers can pass through the shaker screen without having to use larger screen sizes that could cause the loss of excess drilling mud. Shearing is accomplished with the addition of our proprietary stuffing box and shear impeller to the standard DCJQB shear pump. There are no modifications to existing piping required and the DCJQB shear pump is constructed of the same materials as the original DCSB centrifugal pump series. To improve the use of your solids control expenditures use the DCJQB Shear pump to add polymers to your solids system.
Common applications include:
- Polymer Additives
- Particle Degradation
Typical configurations:
- 6×5-14
- 8×6-14
Shear Pump’s Common Failures and Solving Methods
1. Exceeding shaft power
Reason
1) The impeller fractionates the end face of pump casing, the sleeve or auxiliary impeller.
2) The pump works under the condition of than the designed head.
3) The packing is over-tightened.
4) The belt slips.
Method of shooting
1) Adjust the clearances.
2) Inspect the complete machine and properly close the delivery valve for the pump to operate at the design point.
3) Readjust the locking force of gland.
4) Re-tighten them (check the two pulleys installation position).
2. Fall in head and capacity
Reason
1) Big particle jams the suction pipe and flowing channel of impeller.
2) Fall in speed.
3) The impeller is worn.
4) Too much clearance between the impeller and end face of pump casing and the increased leakage.
5) The opening degree of inlet valve is little.
Method of shooting
1) Clear away the jamming object.
2) Operate the pump at the rated speed.
3) Renew the impeller.
4) Adjust the impeller.
5) Increase it.
3. The bearing is overhead.
Reason
1) The lubricant is too much or little.
2) There is impurity in the lubricant.
3) The bearing is worn.
Method of shooting
1) Keep the surface oil at the limited lever of the dipstick.
2) Change of the lubricating grease.
3) Renew the bearing.
4. The pump produces vibration and unusual noise.
Reason
1) The impeller is worn and non-equilibrium.
2) The bearing is worn.
3) The connection is loose.
4) The pump occurs cavitation.
Method of shooting
1) Renew it.
2) Replace.
3) Tighten the loosened locations.
4) Improve the suction condition to prevent air from getting into the pump.
5. The leakage is excessive when stopping the pump.
Reason
1) The seal is over-worn.
2) The shaft sleeve is extremely worn.
3) The packing is extremely worn.
4) The asbestos rings are slantingly rolled up.
5) The debris gets into the packing rings.
6) All the splits of packing rings are in the same direction.
Method of shooting
1) Renew.
2) Replace the sleeve.
3) Renew.
4) Re-install.
5) Clear away the debris and clean the seals.
6) Re-fill them as request.
Drilling Jet Mud Mixer
Drilling jet mud mixer is the device integrated with venturi hopper and mechanical seal jet mixing pump which are connected with manifold valve. Featuring simple structure and high practicability, it can work reliably and be moved conveniently.
The device is mainly used for preparing and weighting drilling fluid through changing the density, viscosity and the condition of dehydration of the drilling fluid. If working with mud shear pump, it can show much greater performance. The device can also be designed to be a double jet mixing device to meet the needs of drilling.
The drilling mud mixer can help operators to get the ideal drilling fluid with good properties by adding bentonite, polymer and other powder additives. As to the application of weighting the mud, the ability of mud mixer to handle barite plays an even more important role. Meanwhile, the jet mixing pump and the hopper can be installed flexibly on a single skid, or on the skid at tank end or separately with the hopper on tank top and the pump at tank side. The flexible design can make the whole mud system compact and user friendly.
Jet Mud Mixer performance
Jet Mud Mixer is designed for efficient mixing bentonite,polymers and other powder additives with drilling fluids to control the density, viscosity of mud. If working with mud shear pump, it can show much greater performance.
Jet mud mixer device generally consists of a sand pump and a jet flow mixed funnel with manifold valve connection and are
installed in a pedestal called the single jet mud mixer device, or by two pumps and two mix slurry funnels called double jet mud mixer device.
Following is the factors of affect jet mud mixer performance:
1 Mixed hopper hydraulic linear loss should be tried to reduce, otherwise the treating capacity may be decreased greatly.
2 The gap between nozzle and venturi tube must be suitable, when reach optimum efficiency, the gap is 32~90mm, usually don’t more than 90 mm, otherwise the feed speed of barite will be significantly reduced.
3 The return pressure of outlet pipe needed moderate, overlarge return pressure will reduce the treating capacity of mixed hopper. For example, when the nozzle outlet diameter is 50mm, the gap between nozzle and venturi tube is 90mm, mixed hopper working pressure head is 21~23m, before return pressure value not reach 50% of inlet pressure, mixing chamber has the high vacuum, however when the return pressure value is near by 50% of inlet pressure, the vacuum is almost zero, drilling fluid begin to return flow in hopper.
4 The higher inlet pressure is, and the larger treating capacity of mixed hopper is.
5 The taller installation of mixed hopper is, the higher return pressure is, mixed capacity will be reduced. For example, if mounting height from 1.8 m to 3.66 m, treating capacity will fall by 17%.
High quality Shear pump for sale
Shear pump is on the basis of existing centrifugal pump theory, through the improvement to develop a new, efficient centrifugal pump, is designed for quick preparation and dispose drilling fluid in the solids control equipment system.
The main application is shear polymer clay, it can mix material effectively, fully hydrate material, save material using, shorten drilling fluid preparation time, supply good drilling fluid performance to drilling process.
In use process of shear pump, we should notice some details: 1 After using shear pump, we should use clear water flush pipeline and shear pump, to avoid leftover block runner and nozzle of impeller. 2 Bearing bore is filled in grease about 10~20ml every other week, combination seal cavity is filled in grease about 10~20ml every day. 3 In winter, if the pump will not used for a long time, drilling fluid in pump shell should be discharged, to avoid drilling fluid freeze.
DC Machinery is a professional manufacturer of shear pump, the shear pump can greatly enhance clay particle extent of hydration, make the polymer be sheared, diluted and hydrated as soon as possible, can save bentonite more than 30%.
The following is the DC Machinery shear pump parameters:
| Model | JQB6545 | JQB6535 |
|---|---|---|
| Flow | 120m3/h | 100m3/h |
| Lift | 45m | 35m |
| Power | 55kw | 45kw |
| Weight | 980kg | 800kg |
| L×W×H | 1150×1100×1500mm | 1150×1100×1250mm |
Matters needing attention of using shear pump
Shear pump is on the basis of existing centrifugal pump theory, through the improvement to develop a new, efficient centrifugal pump, is designed for quick preparation and dispose drilling fluid in the solids control system. The main application is shear polymer clay, it can mix material effectively, fully hydrate material, save material using, shorten drilling fluid preparation time, supply good drilling fluid performance to drilling process.
Matters needing attention of using shear pump:
1 After using shear pump, we should use clear water flush pipeline and shear pump, to avoid leftover block runner and nozzle of impeller.
2 If the shear pump begin to used after nonuse for a long time, we need to fill lubricating oil in combination seal cavity and bearing bore.
3 Before starting shear pump, we must open inlet and outlet valve of pump firstly.
4 Bearing bore is filled in grease about 10~20ml every other week, combination seal cavity is filled in grease about 10~20ml every day.
5 Adjust the small gland of combination seal cavity once a week, When cannot adjust should change the two packing in time.
6 In winter, if the pump will not used for a long time, drilling fluid in pump shell should be discharged, to avoid drilling fluid freeze.
If we can maintain shear pump correctly, the working efficiency of shear pump will be improved greatly, and the service life will be also extended.