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Monthly Archives: March 2013

The auxiliary equipments for solids control system

Except to the shale shaker, desander, desilter, centrifuge and other mud cleaning equipments, the solids control system also including some auxiliary equipments.

1 Drilling mud agitator

Drilling mud agitator is used to stir and mix drilling fluid, prevent the drilling fluid solid particle deposit in the bottom of the cycle tank, and make the drilling fluid performance stable, mixture uniform.

2 Drilling mud gun

The function of drilling mud gun is depend on the nozzle produce the high speed liquid flow, impact the sedimentary solid phase in the bottom of mud tank so that it is suspended. At the same time, after a period of time of stopping the mud agitator, because of the sedimentary solid phase bury the impeller, so the mud agitator needed to restart, the mud gun can eliminate a part of resisting moment which produced by starting the agitator.

3 Hopper

In order to weight for the drilling fluid in drilling process or configurate a little drilling fluid, we generally install the weighted hopper near the suction tank, the discharge pipeline should reach to the hold-up tank and suction tank, so that deal with down hole accident timely.

4 Pipeline

When drilling middle-deep well, in order to deal with down hole accident timely, the arrangement of pipeline should make the drilling mud pump can pump the drilling fluid in hold tank quickly, the drilling fluid discharged from the hopper can be transported into the mud tank, and all of these depend on the pipeline and valve to control.


Dual Motion Shale Shaker for sale

DC Machinery designs and manufactures a new type shale shaker: Dual motion shale shaker. It can form the linear motion and the balanced elliptical motion.

This shale shaker has three vibration motors, use the two 1.72KW motors can form the linear motion, if add the 0.4KW motor will form the elliptical motion.

We can switch the motion trail according to the situation of scene. The following is the parameters of dual motion shale shaker.



Vibrating Mode

Linear Motion + Balanced Elliptical Motion

Motor Power


Vibrating Strength




Treating Capacity

140 m3/h (616 GPM)

Deck Adjustment


Normal Power

380V/50HZ(Foreign custom motor according to customer requirements)

Screen Area

2.68 m2

Screen Specification

750×1195mm  (40~200mesh)


Treating capacity test from mud:1.2g/cm3 density & viscosity 45s & 40mesh

DC Machinery is a professional manufacturer of Solids control equipment. We can supply high quality dual motion shale shaker and the type also can be customized according to the requirement of customers.



DC Solids Control Equipment & The 13th China International Petroleum Exhibition

TangShan DaChuan Machinery took part in the 13th China International Petroleum Exhibition on March 19 to 21. DC Machinery is a professional manufacturer of solids control equipment in China. We brought our products to the exhibition. Including the Double Motion Shale Shaker, Mud Cleaner, Jet mud mixer, Centrifugal Pumps and Mud Tank.

We have obtained great harvest in the exhibition. Many regular customers of ours joined this exhibition and visited our equipments, and gave a high praise.


British university textbooks drilling professional term

This article is about the drilling professional term. Because of the terms are too much, so I only list the part of the term.

1 Adjustable choke: a choke in which the rate of flow is controlled by adjusting a conical needle and seat.

2 Annular preventer: a large BOP valve that forms a seal in the annular spacebetween the wellbore and the drillpipe. It is usually installed above the ram type preventers in the BOP stack.

3 Barite: (Baryte) Barium Sulphate(BaSo4), a mineral used as weightingmaterial to increase mud weight (specific gravity = 4.2).

4 Abandon a well: to stop producing hydrocarbons when the well becomes unprofitable. A wildcat may be abandoned after poor results from a well test. Mechanical and cement plugs are placed in the wellbore to preventfluid migration to surface and between different zones.

5 Abnormal pressure: a formation pressure which is greater or less than the “normal” formation fluid hydrostatic pressure. Such pressures may be classified as “subnormal”(lower than normal) or “overpressured” (higher than normal).

6 Accelerometer: a surveying instrument which measures components of the Earth’s gravitational field.

7 Acidise: to apply acids to the walls of oil and gas wellsto remove any material which may obstruct flow into the wellbore.

8 Angle unit: the component of a survey instrument used to measure inclination.

9 Anticline: a configuration of folded and stratified rock layers in the shape of an arch. Often associated with a trap.

10 Azimuth: used indirectional drilling as the direction of the trajectory of the wellbore measured in decrees (o-359) clockwise from True North or Magnetic North.



Drilling mud cleaner China manufacturer

A main function of drilling mud cleaner is eliminate the solid particles whose particle size is bigger than the barite, and recycle the barite in drilling fluid.

Practice has proved, drilling mud cleaner has the following advantages:

1 It can control the solid content in weighted drilling fluid effectively, prevent differential pressure sticking of tool.

2 It is the requisite solids control equipment for disposing weighted drilling fluid in deep well or extradeep well. It can eliminate solid particles from weighted liquid, and also can recycle the barite and liquid phase.

3 It can save the drilling cost.

4 Improve the well site environment.

DC Machinery is a professional manufacturer of  solids control equipment. The mud cleaner produced by DC Machinery has the following features:

1 The main structure of mud cleaner can be divided into two parts, the desander and desilter are installed on the upside. The base is equipped with the chute, and a shale shaker is installed on the chute. The structure is compact, and occupies small space.

2 Between the main inlet pipe and outlet pipe is equipped with butterfly valves, can adjust the work numbers of desander and desilter at any time, easy to operate and maintain.

3 The feed port adopts tangent feed, smooth transport, for improving separation efficiency. The inner surface of mud cleaner is smooth, and the flow channel is rational.

4 Different numbers of hydrocyclones of desander and desilter can be matched according to the requirement of customers.

More informations please come to DC Machinery  official website.


Mud gas separator principle of operation

The operating principle of a mud gas separator is relatively simple. The device is essentially a vertical steel cylindrical body with openings on the top, bottom, and side.

The mud and gas mixture is fed into the separator inlet and directed at a flat steel plate perpendicular to the flow. This impingement plate minimizes the erosional wear on the separator’s internal walls and assists with mud gas separator.

Separation is further assisted as the mud gas mixture falls over a series of baffles designed to increase the turbulence within the upper section of the vessel. The free gas is then vented through the gas vent line, and mud is returned to the mud tanks.

Operating pressure within the separator is equal to the friction pressure of the free gas venting through the vent line. Fluid is maintained at a specific level (mud leg) within the separator at all times.

If the friction pressure of the gas venting through the vent line exceeds the mud-leg hydrostatic pressure within the separator, a blow-through condition will result sending a mud gas mixture to the mud tanks.

As one can readily see, the critical point for separator blow-through exists when peak gas flow rates are experienced in the separator. Peak gas flow rates should theoretically be experienced when gas initially reaches the separator.


Solids control equipment for Horizontal Directional Drilling

The Horizontal Directional Drilling (HDD) process requires the use of a drill rig, drilling head, drilling fluid, a reamer, drill rods and a range of ancillary equipment, including pulling heads, swivel connectors, and a pipe roller. Although implementation of HDD does not require an entry chamber, an exit chamber is often excavated to contain drill slurry for collection prior to recycling or removal.

From the drill rig, the drilling head navigates through the ground along the desired bore path and past any obstructions. The resultant spoil is removed during the drilling process with a slurry (or drilling fluid) comprised of Bentonite and sometimes a composition of water and polymer. This slurry is also used in the drilling process to stabilise and lubricate the borehole as well as acting as a cooling agent for the drill head and embedded location transmitter.

In any HDD works, a major component of the drilling activities is the drilling fluid. In many instances and also in situations when the new pipe diameter is much larger than the pilot hole, it is vitally important that the correct amount and mixtures of drilling fluid is resourced.

In general, we use solids control equipment to process drilling fluid. Drilling fluid solids control system mainly includes three parts: drilling fluid circulating tank, drilling mud cleaning equipment, electronic control device.

Drilling fluid circulating tank is composed of several chambers, can be equipped with shale shaker, desander, degasser, desilter, centrifuge, sand pump, mud agitator, etc. and also matched with all kinds of pipeline, valve, and other assist device.

High quality Jet Mud Mixer for sale

Jet mud mixer is used to make up drilling fluid or increase total amount of the drilling fluid, change the fluid density, viscosity, and dehydration. When making up again, put the materials of drilling fluid (such as betonies and barite powder) and corresponding chemical additives (such as polymer) into the recycle tank through the jet unit. If put them directly, the materials of drilling fluid and chemical additives will be deposited largely or dump together and we can’t obtain diffused and well-proportioned drilling fluid.

Several days ago, we supplied a jet mud mixer for our customer. The following is the technology parameters:

1 Matching pump: 22Kw

2 Treating Capacity: 100m3/h

3 Pressure: 0.25~0.40Mpa

4 Inlet: 35mm

5 Hopper dimension: 600x600mm

6 Burden speed: ≤100kg/min

7 Density: ≤2.8g/cm3

8 Viscosity: ≤120s

DC Machinery can design and manufacture high quality jet mud mixer according to the requirement of customer. Welcome to our website.


High quality solids control system for sale

Recently, we received an order of  a small solids control system, including shale shaker, desilter, desander, mud mixer, pumps and tanks.

This small solids control system is used for 1500m drilling rig, treating capacity is 90~120m3/h. The following pictures are the solids control equipments for our customer.

The system has a good performance of cold-resistent, high temperature resistance, anti-explosion, anti-leakage, anti-corrosion, raining proof, adapt to wicked condition of well drilling.

The surface is processed by sandblasting, the in-tank is painted with heavy anti-corrosion bituminous paint, and outside of the tank is painted by the oil-proof and acid and alkali corrosion resistant paint.

Behind the tank, there is a pressure bar type clear sand door, it is convenient and neat to open.

To use the hard links between the tanks, it is convenient to install and dismantle, has a good scalability.

DC Machinery is a famous manufacturer of solids control equipment in China. We can supply high quality solids control system according to the requirement of customers.

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