What are oil drilling AIDS

There are many kinds of petroleum auxiliaries, which play an important role in the process of oil field development. Oil and

 gas field development is a complex comprehensive project composed of exploration, drilling, underground operation, oil 

production, gathering and transportation. In every part of the operation, a large number of chemicals are required. Drilling 

AIDS as an important auxiliary material for geological exploration, but many friends for oil drilling AIDS this term is still 

relatively unfamiliar, and then follow Yalit oil to understand some small knowledge of oil drilling AIDS.

The role of oil drilling AIDS

1) Aggravating agent

When the fluid column pressure of drilling fluid can not balance formation pressure or a blowout needs to be killed, it is necessary

 to add a weighting agent to the system to increase the specific gravity of drilling fluid to achieve the purpose of balancing formation 

pressure and stopping the blowout accident. The commonly used weighting agent  is barite (BaSO4).

2) water loss reducer

In order to reduce the loss of drilling fluid to the formation and ensure the safety of the well, the chemical agent used to protect the

 stability of the mud colloid is called the fluid loss agent.

Currently commonly used fluid loss agents are:

Carboxymethyl cellulose, carboxyethyl cellulose, modified starch, etc. These products can be dispersed in water, but do not dissolve.

To plug the pores in the formation, prevent   filtration, and because it is oil-soluble. So they don't clog oil and gas channels, and they 

can also be used in completion fluids, workover fluids, and perforating fluids.

3) Dispersant (also known as diluent)

When clay and cuttings in drilling fluid reach a certain concentration, a spatial network structure will be formed. When drilling into the

 salt paste layer, the dissolved salt in the formation water, especially the high-value cation, will aggravate the formation of the network 

structure. Make the fluidity of drilling fluid worse. Additives that can break up this network structure, release free water, and reduce the 

viscosity and shear force of the drilling fluid are called dispersants. Commonly used dispersants are: lignosulfonate and its complexes with 

iron chromium, titanium, manganese, tin ions, etc.