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Oil drilling grade carboxy methyl cellulose CMC

Oil drilling grade carboxy methyl cellulose CMC

  • Appearance: White or light yellow powder, no lumps
  • Application: oil drilling
  • Moisture: ≤10
  • Purity: ≥80
  • Degree of substitution/D.S: ≥0.8
  • PH:6.5-8
  • Apparent viscosity/m Pa.s:30-90
  • Filter loss/mL:≤10

CMC appears to be white or light yellow powder, which is odorless and non-toxic. it's soluble in cold or hot water. when it solutes, some colloidal solution will appear, which is neutral or slightly alkaline. The important feature of CMC is that it can form colloid solution with high viscosity. Many factors influencing its viscosity are concentration, PH, temperature, substituted ratio and salts, etc.

CMC, as a kind of water-soluable gel in the drilling fluid system, constitutes drilling mud. It's with high control ability of water loss. HV2 is a highly efficient fluid loss agent. When under the lower amount of water, you can control the water loss in a appropriate water level, without affecting the other performance of the mud. In addition, the quality of the mud cake it formates is good and it's with strong and tough property. Besides, its performance of salt resistance and temperature resistant is good. Under a certain concentration of salt, it can still have good filtration reduction ability and keep a certain rheology. its viscosity changes little in the saline solution and aqueous solution. Adhesive is applicable for deep drilling. The rheology of slurry, with performance of good non-newtonian fluid, can be easily controlled. when CMC was used as cementing fluid,  it can prevent fluid from flowing into the rock formation and fracture. As a fracturing fluid, it can control the loss of fluid that flows into the well.Oil drilling grade carboxy methyl cellulose CMCOil drilling grade carboxy methyl cellulose CMCOil drilling grade carboxy methyl cellulose CMCOil drilling grade carboxy methyl cellulose CMCOil drilling grade carboxy methyl cellulose CMCOil drilling grade carboxy methyl cellulose CMC

Mix the CMC directly with water and prepare it as a paste glue. When configuring the CMC paste, first add a certain amount of clean water in the batching tank with a stirring device. When the stirring device is turned on, slowly and evenly spread the CMC into the batching tank, stirring continuously to make the CMC. Fully integrated with water, CMC can be fully dissolved. When dissolving CMC, the reason why it is to be uniformly dispersed and constantly stirred is to "prevent the formation of clumps, agglomeration, and reduction of CMC dissolution when encountering CMC and water," and to increase the dissolution rate of CMC. The mixing time is not consistent with the time when the CMC is completely dissolved. It is two concepts. In general, the stirring time is much shorter than the time required for the CMC to completely dissolve. The time required for the two depends on the circumstances.

The basis for the determination of the stirring time is that when the CMC is uniformly dispersed in the water and there are no apparent large agglomerate-like objects, the stirring can be stopped and the CMC and the water are allowed to penetrate and fuse with each other in a standing state.

The basis for determining the time required for complete dissolution of the CMC is as follows:

(1) There is no solid-liquid separation between the CMC and the water.

(2) The mixed paste has a uniform and uniform surface with smooth surface;

(3) The color of the mixed paste is nearly colorless and transparent, and there is no granular object in the paste. The CMC is introduced into the batching tank and mixed with water, until the CMC is completely dissolved, and the time required is between 10 and 20 hours.

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Contact Person:Jack Ma

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