The Requirement of Oilfield Chemicals and their Preparation

Oilfield Chemicals a Specialized Chemical:

Apart from developed equipments, there are specialized chemicals known as oilfield chemicals that find prominent use in these projects. Consequently, the demand for these chemicals is ever increasing and therefore, the preparation, packaging and distribution of such types of chemicals are being taken up by the oilfield chemical manufacturers in order to meet the needs of these chemicals in the market. India is well-known for the manufacture of such chemicals and the chemicals prepared here are widely circulated in various parts of India as well as abroad. There are certain specific chemicals like calcium bromide (CAS No.7789-41-5) that is very popular choice of chemical component for the petroleum industries and hence are manufactured in large quantities in India.

On-Shore Drilling Activities:

The offshore drilling activities as well as the on-shore drilling activities related to oil and gas exploration projects have evolved from the earlier conventional processes to the modern times where science and technology find massive use altogether. Starting from the standard of the chemicals like work-over fluids or specialty chemicals to the mechanism used with the equipments, every single sphere of the process has undergone an all-round development. Simultaneously, the processes have transformed into being more safe, sound and eco-friendly. Along with that, these have also become extremely economical too that adds on to the profitability of the exploration projects.

Several by-products are produced during the oil and gas drilling processes and one such by product is salt water. This is again kept aside in disposal pits along with some residual oil that remains along with the salt water. Afterwards, the oil being skimmed out of the salt water and only this portion of oil constitutes almost 40% of the total revenue of the companies. Oilfield chemicals are therefore extensively used in order to simplify the processes of exploration and some of these chemicals include zinc bromide, sodium bromide, sodium chloride, calcium bromide and the like. These salts are either used singly or in combination with other salts based on the specific needs of the projects.

Oil and Gas Operations:

These are also known as completion fluids sometimes that help in controlling well-bore pressures during drilling activities in upstream oil and gas operations. Calcium bromide (CAS No.7789-41-5) is one such fluid that can be used single or with other salts to get fluids of varied densities at different crystallization temperatures. It is basically a clear and colorless liquid that looks transparent and sometimes comes with a pale yellow color also. This is a very important chemical used in lots of exploration processes in a very cost-effective and environment friendly manner that makes it one of the most sought after chemicals of petroleum industry.

The essence of oil drilling chemicals in oil exploration projects

It becomes extremely essential on the part of the companies to take care of several factors while manufacturing these chemicals. This is because the percentage of composition of the compound will define their characteristics that will in turn vary in its action during the course of oil and gas exploration. The various features that are exclusively common in the oil drilling chemicals are:

• Presence of abundant suspension properties so that the drilled cuttings can be easily transferred to the top of the exact sites where the exploration is being done.

• The solids on the surface must not get dispersed in the chemicals at any cost or else this may come in the smooth way of oil and gas exploration and hinder the efficiency of the process as well by damaging the production zone.

• Since the oil and gas are explored by boring wells, hence the hydrostatic pressure has an important role to play here. The chemicals are responsible for the exertion of such pressure that in turn helps in the creation of balance in the pressure so that no other fluids come in the way of oil exploration. This requires the chemicals to have a specified density and specific gravity too.

• Apart from the above-mentioned features, these fluids are also helpful in maintaining appropriate well-bore stability as well. The companies have to take care of the density and other relevant chemical properties of the chemical fluids while the preparation process so that these can easily help in controlling the optimum level of formation pressures that is necessary to maintain while oil and gas exploration. In fact, along with the chemical properties, the physical properties of the chemicals also play a major role in the preparation process because this will also define the stability of the process over a certain period of time.

• Any sort of damage can be averted with the help of these Oil Drilling Chemicals such as zinc bromide and sodium bromide solution.

 

• In addition to all these, these chemicals are also vital for lubrication purposes. This is important because enormous amount of heat is generated during the drilling process and in order to compensate for the after-effects like friction, etc. these fluids are very much helpful because their circulation inside the well-bore lubricates the whole assembly and the pipe that in turn facilitates a smoother movement of the process altogether.

Fluids like Sodium Bromide Solution is one of the main chemicals that is dominantly used in these projects because all the above-mentioned properties are present in this chemical and it can be used as a single solution and mixed with other chemical compounds as well.

Importance of Completion Fluids in Oil and Gas Exploration

Unique Clear Brines:

Oil and gas industry makes use of special types of fluids called clear brines which help in the completion of an oil well. Ideally there shouldn’t be any solids in the liquid which are salt solution made with the addition of one or more salts. These liquids are used to minimize damage to the well bore and to provide stability to the well. Brine solutions are given more preference over mud because of the salt content which mixes with water rather than forming suspension which settle after a certain period of time.

Clear brines are salt solutions which are usually mixture of bromides, chlorides and formats. They have the required density and characteristics which are necessary for completing oil and gas extraction safely. There ionic composition is high and there pH value is also on the higher side. These liquids are identical to reservoir formation chemically. Oilfield chemicals are not used for ordinary purposes because they are expensive and corrosive.

Oilfield Chemicals:

Completion fluids are used widely in oil and gas exploration by various companies who take up these projects. These liquids are used when the drilling process is towards the end and while testing the well. The fluid is introduced into the well to help ease the operations before the production of hydrocarbon is started. This enables reduction of friction between the equipment and the wall and of the well. It controls the temperature from rising due to fiction and prevents the equipment from damage.

A vast amount of study and research is employed in studying drilling fluids. The success of drilling operations depends a Great Deal on Completion Fluids. Up to 100% success can be achieved with this selection of right type of fluid for billing purposes. Therefore, it is important to understand the chemistry of drilling fluids while choosing oilfield chemicals.

Zinc Bromide Crystallization:

One of the commonly used liquids is Zinc Bromide (7699-45-8) which is used as a work over fluid and a completion fluid. It is used when the required density is 19.2lb/gal. It is usually mixed with calcium bromide or calcium chloride to get varied densities as per the wellbore conditions. Fluids created in this manner can be manufactured for various crystallization points and can also be used for special applications as well as for winter use. To get therequired density and crystallization temperatures he blending table should be consulted.

It should be stored in appropriate corrosion resistant containers and should be closed and sealed ensuring there is no leakage. Since it is a hygroscopic salt solution which absorbs water from the atmosphere, the density of the liquid will go down if exposed to air. Caution should be exercised while handling and all safety measures should be taken as prescribed by the manufacturer.

Importance of Chloromethyl Isopropyl Carbonate as a pharma intermediate

Key Importance of CMIC

Purity of chemicals is the most important thing and all reputed manufacturers take responsibility toward the purity of chemicals they manufacture. The quality of component chemicals ensures the success of the outcome for which they are to be used. This is especially true about CMIC which is used to manufacture Tenofovir, a medicine that can combat HIV AIDS together with other medicines.

CMIC which stands for Chloromethyl Isopropyl Carbonate has huge demand in the market. As a primary component in the development of Tenofovir, it is indeed one of the significant chemicals that are demanded in the purest form. Known as an antiretroviral medicine that can also fight chronic disease like Hepatitis B, Tenofovir finds its place in the essential drugs list of WHO. Tenofovir is forms a part of the treatment prescribed and is given in combination with other medicines.

This pharma intermediate is developed with the help of best equipment and by the use of latest technology. Throughout its production high standard is maintained so that the final product is of best quality. This is essential because only then its job as a pharmaceutical intermediate will be completed. Its purity, composition and shelf life is extremely important to ensure a longer shelf life. For those companies who are looking for the supply of this intermediate for large scale use, these factors are of utmost importance.

Preparation of Tenofovir Disoproxil

Tenofovir is carefully added to cyclohexane in a ratio of 1:8 at a temperature range of 25 to 35 degree Celsius. The process is conducted in the presence of nitrogen. The temperature of the reaction rises to reflux. The moisture content is also separated with the help of azeotropic distillation. When the temperature of the reaction increases to 54 to 58 degree centigrade, Chloromethyl Isopropyl Carbonate is added. Thereafter, step by step process is followed in order to get the desired outcome.

Importance of CMIC

It has chemical formula C5H9ClO3 and is a pharma intermediate of great significance. It has several applications apart from being used in the development of anti HIV AIDS medicine. It should be stored and packaged carefully so that it is not leaked in the atmosphere.

CMIC holds an important place among the pharma intermediates. It has huge market demand and therefore it is manufactured by some of the best known companies with quality infrastructure and the right kind of system and processes. In India there are some companies which can offer this chemical with purity of 99.9%. The available expertise of these companies let them offer quality products used in developing various Pharmaceutical Chemicals products such as HMDSO, HMDS, and TMCS etc. With their quality driven approach they are able to satisfy not only the domestic clients, but, also the international buyers.

About Drilling Fluids | CHEMCON

Drilling Fluids Support:

The drilling activity requires drilling and completionand are used widely across the globe. Both the fluids use different types of the base that include water-based systems, synthetic based systems, oil based systems, and other systems.

The completion and drilling fluids are directly dependent on all the drilling activities all around the world.

Fundamental of Drilling Fluids :

The Drilling Fluids Solution are commonly known as mud system; it is a single component of well destruction process that remain in contact throughout the drilling operation system. Some of the essential functions of this fluid include:

• It cleans the hole by the transportation of drilling cuttings to the surface, where they can be removed automatically from the fluid before it recirculated to the down-hole.
• Balances and overcomes the formation pressure to minimize the risk of well-controlled issues.
• Minimize and prevent the damage to the producing formations.
• Cool, and lubricates.
• Allows all the information of producing formations to be retrieved by cutting analysis, and wire logs.

There are various types of drilling that include:

• Salt water system
• Fresh water system
• Oil based system
• Air, foam, gas fluid systems

Mostly, water based systems are used and are also less expensive than oil based fluids or synthetic based fluids (OBF’s and SBF’s). They are also known as invert emulsion systems, have a high cost per unit than other water-basedsystems. The pneumatic systems are implemented in areas where the pressures are relatively small, and the risk of circulation is high. Using the systems require special pressure management equipment to help prevent the development of hazardous conditions.

Finishing Point of Fluids :

On the other hand, a completion fluid is a solid free liquid that is used in completing the oil or gas well. To facilitatethe final operations such as setting up the screens, Packers, or shooting in the production zone, the fluid is placed in the well. Drilling and Completion Fluids are typically brined that is chlorides, bromide, and formates, but in personal can be any fluid of the proper density and characteristics.

Seldom is a conventional drilling fluid that is suitable for the completion of operations due to the solid content, and pH composition. The drill in fluids in some cases are appropriate for both the purposes.

Types of Drilling Fluids:

The water-based fluids usually consist of the clear brines. The only problem is that they are not very clear. They have some solids that include corrosion products, bacteria, and debris from the surface tanks. The density of the brine is mainly large enough so that the bottom hole pressure exceeds the reservoir pressure. A substantial amount of solid can be pushed in the form of formation, resulting in the loss of permeability. Oil based fluids such as the muds and crude oil can be used as a kind of completion fluids. It is also efficient to ensure that the oil does not contain paraffin.

Importance of Hexamethyl Disiloxane

Chemcon Specialty Chemicals focuses on the manufacturing of Hexamethyl Disiloxane or HMDSO, considered an important chemical in the field of pharmacy. It is a clear and essentially an odourless liquid that has been of great benefits to the pharmaceutical industry along with a variety of cosmetic products. With the molecular formula of C6H18OSi2 and molecular weight of 162.38, it has the fastest evaporating rate and the lowest surface tension. Due to the highly lipophilic nature and the high spread ability of its crystallizing compounds it is used for the preparation of liquid bandages, adhesives, silicone rubber and silicon compounds.

Hexamethyldisiloxane is prepared through the process of the hydrolysis of trimethylsilyl chloride or TMCS. It reacts with the nucleophiles which results in the replacement of the chloride. This nucleophile is water which further results in hydrolysis to give the Hexamethyl Disiloxane.

2(CH3)3SiCl+H2O→(CH3)3SiO(CH3)3Si+2HCl

It also results from the hydrolysis of silylethers and other silyl-protected functional groups.

Apart from being used in the pharmaceutical industry it is also used as a major source of the Trimethylsilylchlorosilane functional group in the process of organic synthesis. Carboxylic acid is converted into different types of silyl ethers in the presence of an acid catalyst along with HMDSO. When mixed with oxygen (O2), HMDSO produces a plasma-polymerized coating that can provide protection from corrosion and other elements. It is also used in the preparation of spectroscopy. It is also used in stationary liquids, analysis reagent and moisture repellent.

While the most important use of TMCS is the preparation of HMDSO, it also has various uses. For example, it can be used for the production of silicon compounds and various alkylation agents and the also the production of different types of drugs and medicines. Another important usage of TMCS is to manufacture anhydrous solutions of HCL that is used in synthesis of esters from nitriles and carboxylic acids. It is also plays a major part in producing laboratory glassware as it makes the surface more lipophilic or soluble in liquids.

Chemcon Specialty Chemicals makes full use of HMDSO’s purpose of humidity sensing and has been constantly studying it through various evaluations and experiments. The relative humidity and other properties are also constantly being examined. HMDSO thin films are known to display a small recovery and response of around 34 and 8 s for desiccation and humidification processes. Therefore, apart from contributing to the pharmaceutical industry, of Hexamethyl Disiloxane it has innumerable uses in other industries around the world.

Use Of Clear Brine Completion Fluids As Drill-In Fluids

Drilling Activities & Energy Resources:

Growing energy demand globally has boosted drilling activities. Today world is experiencing tremendous high demand for natural energy resources whether it is conventional or non-conventional as a result industries which are not in field of drilling have also started showing interest in this field.

Various Use of Drilling Fluids:

Clear brine drilling fluids are the industrial fluids that are used for various purposes like used as drilling fluids in oil and natural gas industries, work over, and as completion fluids. They are specially used to control pressure in oil and gas wells. Clear brine fluids are segmented on basis of product type into categories like Calcium chloride, Potassium chloride, potassium bromide, sodium bromide, calcium bromide. They are formulated to achieve various ranges of densities. Oil base drilling fluids and water based drilling fluids are not viable for use because of they needs to be disposed after single time use hence brine based drilling provides great alternative for it.

The advantage of using brine based drilling fluids over other drilling fluids is that they are ecofriendly in nature , are less corrosive to drilling assembly, and provides excellent penetration rate in varying rock formation. Water based drilling muds causes’ clay swelling but in case of brine based drilling muds this problem is neglected. Brines are more expensive but are most effective fluids.

Clear Brine Fluids Apply:

Clear brine drilling fluids have excellent properties that make them widely used drilling fluids and Clear Brine Completion Fluids. They exhibit properties like they can protect polymer at high temperature, they can stabilize shale, can provide good lubricity, are non-toxic, and are easily biodegradable. For these fluids to function properly they must be stable at surface as well as in the wells. Discovery of these fluids have encouraged more and more off shore and deep water drilling. And hence drilling fluid solution providers. Have been in great demand in recent years. Manufacturers of completion fluids in India is not only fulfilling need of fluids in India but also manufacturing globally and hence fulfilling needs globally too.

Manufacturers of completion fluids in India:

CSCPL is leading Drilling Fluids Solution & Products providing quality drilling fluids. These fluids are used not only for oil and gas drilling but also for geothermal drilling. Geothermal drilling are often more difficult to deal with as compared to oil and gas drilling. In oil and natural gas drilling, drilling fluids are utilised for under reaming and work over type of operations. They are designed not only for fulfilling the operations but also to protect production zones. Brine base drilling fluids are the most widely used drilling fluids because of their ability to protect the formation while drilling and controls hydrostatic pressure without suspended solids also inhibiting swelling and migration formation clay.