Category Archives: shearing pump

How to solve the commen failure of shear pump

  1. Packing seal problem of shear pump:

Fault: Serious leakage of sealing filler, and the packing is wore heavily, the surface of shaft sleeve is wore.

Solution: Remove the packing, move in the wall of the shaft sleeve with a fine wire which is bent 90 degrees. Replace the axle sleeve If a deep groove is checked out, packing gland pressure too tight lead to serious wear of packing.

  1. Polyurethane problem of shear pump:

Fault: The serious wear of oil seal causes serious leakage.

Solution: Replace the polyurethane oil seal. In general, the polyurethane oil seal and the sleeve at the place of shaft seal should be replaced after the pump running for 3-6 monthsshear pumps

  1. Shear pump packing is burnt:

The reason: Filler cap pressure too tight, causing overheating.

Solution: Replace the packing and the gland pressure can not be too tight.

  1. The rotation of impeller or vice impeller of shear pump is not normal:

Reason: The gap between the back of the impeller and the guard plate is small, or

the gap of the secondary impeller between the shield plate and the stuffing box is too small.

Solution: Use the bolt and nut to adjust the clearance. Twirl the shaft by hands after adjustment, there should be no resisitance card and friction sound in each part, and it should be rotating flexible.

What is a solid control shear pump

The shear pump is a new type of centrifugal pump, which is based on the existing centrifugal pump theory, it is the equipment designed for rapid configuration and processing of the drilling fluid in the supporting system of solid control equipment.

The main purpose of the shear pump is  to shear polymer clay (drilling fluid medicine), in the preparation of drilling fluid, it can efffectively mix, fully dydrate the added materials in the drilling fluid, save the use of drilling fluid materials and shorten the preparation of drilling fluid to provide a goog drilling fluid performance.

shear pump


Shear pumps transport the drilling fluid containing abrasive fine particles, the working condition is very bad, when the shaft seal of shear pump leak, it will not only lead to low efficiency and waste of the drilling fluid, but also cause serious environmental pollution. Therefore, efficient and reliable sealing quality is the key to ensure the continuity and safety of the shear pump.

Shear pumps developed by DC Machinery Co., Ltd . have perfect shear and hydration system, which can quickly cut and dilute hydrated polymer.

(1) Unique mechanical composite seal technology, ensuring no leakage.

(2)High wear-resistant metallic material impellers and casing will prolong service life.

(3) Impeller structure which accords with the principle of fluid mechanics will increase liquidity.

(4) Efficient and low shear force will reduce costs.

If you have some needs or questions of this product, please contact us!




Tangshan DC solid control pumps

Tangshan DC solids control equipment is a professional well drilling solid control equipments manufacturer. DC provide whole solid control equipment and various pumps feeding for shale shaker, decanting centrifuge etc equipments. The following lists various pumps DC produce.

An oilfield solids control system needs many centrifugal pumps to sit on or in mud tanks. The types of centrifugal pumps used are sand pumps, submersible slurry pumps, shear pumps, and charging pumps. They are defined for their different functions, but their working principle is the same.

Centrifugal pump

centrifugal pump

DC SB Series Centrifugal pumpis used for transferring drilling mud. It can be used as feeding pump for desander, desilter, or used as mixing pump for Jet Mud Mixer. Also it can be used as trip pump,and supercharging pump for rig mud pump. All DC model centrifugal pumps use tungsten carbide mechanical seal, with famous brand Bearing. And spare parts interchangeable with most of the international Brand pump which helps customer to source spare parts easily. Open impeller design that lowers axial thrust loads, and make it easier for installation, repair and maintenance.

Submersible slurry pump

submersible slurry pumpp

DC YZ SeriesSubmersible slurry pumpis with structure of vertical single stage and single suction system overhung centrifugal pump, it is made of abrasion-resistant alloy, it can transfer medium with high concentration particle. The normal submersible length is 1.3m/1.5m,customized length is available. There is no bearing and Gland Seal between impeller and pump body, so the slurry pump is maintenance-free and high temperature resistance, the slurry pump is the ideal centrifugal pump for feeding to decanter centrifuge, and feeding from mud pit for to the shale shakers on the mud system, it can also be used as feeding pump for desander and desilter.

Shear pump

shear pump

The DC shear pumpreduces the cost of mixing polymers and clays while improving mud properties. Shearing the polymers eliminates fish eyes and prevents polymer chaining (long strings), which cannot pass through the shaker screens. The DC shear pump is available as a belt-driven or diesel-driven package including a hopper, mud gun, and transfer line orifice plate. A complete system with skid, tanks, and piping are also available.



YZ slurry pump

YZ Submersible slurry pump structure

It is made of abrasion -resistant alloy , it can convey medium with high concentration particles .There is no bearing and Gland Seal between impeller and pump body , so it is maintenance -free and high temperature resistance , it is the ideal equipment to provide impetus for desander , desilter and centrifuge .

YZ 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 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 water by slurry pump is between 800 and 2000 , the suction pipe can be matched in case of need .The shaft seal runs into the underwater pump without setting up the shaft seal, drive should be installed the vertical motor on the supporting seat connecting with coupling and pump.


shearing pump operation

Shearing pump is an essential equipment in solid control system .

  •  prepare
  1. pump rotates freely by hand .
  2. check the pump rotate direction , the correct direction can be found by an arrow on the casing .
  3. Open the suction valve fully.
  4. pump and suction line full of fluid for venting air
  • Operation for running start the motor after finishing all the preparations
  • Lubrication
  1. Bearings lubrication ,add a good grade of 10 W 30 weight motor oil until the middle level of dipstick .Do not overfill the oil .High levels nay cause churning and overheating of the bearings .Oil should be changed every 90 days or 1000 hours
  2. Under the special condition , you may select a grease which can dissolve with the motor oil for lubrication
  3. Stuffing box lubrication , the stuffing box may be re-lubricated with grease as often as necessary to prevent the packing from overheating .It should be lubricated at least once a day
  4. On filling , grease should be pumped into the box while turning the shaft until it comes out around the packing gland .


JQB series shear pump features

JQB series shear pump is the DaChuan Machinery company to provide users with rapid configuration and processing mud design of new equipment, and can satisfy

User configuration of mud high performance requirements.

JQB series shear pump can effectively mix, fully hydrated drilling fluid which add material, saves the mud the use of material, shorten the mud configuration time,

For drilling process provide good mud property, is a kind of ideal drilling fluid solids control system.

JQB series shear pump has the following functions

Shear pump can greatly improve the hydration degree of soil particle move.

Move soil particles in the water dispersion and hydration degree depends on water electrolyte content, time, temperature, the surface can be substitution cationic quantity and concentration, in other conditions of the same circumstances, the use of JQB series shear pump can save bentonite by more than 30%.

JQB shear pump can make polymer shear dilution, hydration as soon as possible.

Mud used in the high molecular weight polymer, directly add not easy hydration,so to polymer need preliminary shear.

Shear pump can provide high shear efficiency, speed up the polymer dilution, hydration process.

DC Machinery is a professional drilling mud solid control system manufacturer,JQB series solid control system shear pump in drilling market competitive circumstances, greatly shorten the mud configuration of time, will no doubt for enterprise to bring good economic benefits.