► Provides high-quality primary penetration of low-permeability productive reservoirs;
► Has an optimal rheological flow model;
► It is characterized by high hydrophilicity and pseudoplasticity, the ability to liquefy to a viscosity close to the viscosity of water at high shear rates and to fade at low;
► Provides stability of the borehole walls in rocks prone to cavings;
► Forms a thin elastic crust on the walls of the well, preventing filtrate contamination of the productive formation;

Minimization of wellbore constrictions as a result of clay swelling associated with inhibition of swelling, as well as optimal selection of specific gravity.
Swelling limit of clays
(comparison of Kem Bio and clay mortar)

Minimization of wellbore constrictions as a result of clay swelling associated with inhibition of swelling, as well as optimal selection of specific gravity.

Swelling limit of clays
(comparison of Kem Bio and clay mortar)

Kem Pol maloclinic polymer-carbonate

► Due to partial replacement of the structure agent, the solid phrase content is reduced;
► Has an optimal rheological flow model;
► Provides stability of the borehole walls that are prone to cavings;
► Forms a thin elastic crust on the walls of the well, preventing filtrate contamination of the productive formation.

Causes of wellbore instability physical and chemical interaction

► Hydration of active clays (swelling, shrinkage);
► Hydration of brittle clays (cracking, crumbling);
► Dispersion of chemogenic deposits;
► Well wall erosion.

Physical and chemical interaction
● Hydration of active clays
(swelling, shrinkage)
● Hydration of brittle clays
(cracking, crumbling)
● Dispersion of chemogenic deposits
● Well wall erosion
Solution
Polymers adsorb on solid particles, providing their encapsulation

Physical and chemical interaction

● Hydration of active clays
(swelling, shrinkage)
● Hydration of brittle clays
(cracking, crumbling)
● Dispersion of chemogenic deposits
● Well wall erosion

Solution

Polymers adsorb on solid particles, providing their encapsulation

Kem Clays and Kem Claysvar clay mortars

They are used when drilling uncomplicated sections of the borehole:

► form a dense crust that limits the penetration of filtrate into the strata;

► allow to quickly adjust hydrostatic pressure in the borehole by changing the density of the solution;

► hold the sludge in suspension during circulation stops;

► allow you to prevent absorptions, reduce their intensity;

► when used with the addition of polymers (Kem Clays) significantly reduces filtration.

Kem EX - clay-free biopolymer-carbonate chloralkalium solution

Optimal solution from the point of view of productive formation penetration when drilling under the production string

Clayless biopolymer-carbonate chloralkalium solution

► Characterized by low solid phase content and low filtration;

► Ensuring the highest possible rate of penetration;

► Forms a thin elastic crust on the walls of the well, preventing filtrate contamination of the productive formation.

Filtration HPHT quality of clay-free biopolymer chloralkaline solution

(during construction of the production shaft, 4457m downhole)

Kem Block swilling — clay-free hydrogel drilling fluid for long horizontal intervals and SMD

Hydrogel drilling mud for long horizontal intervals and SMD

Highly inhibited mineralized drilling mud

Designed for drilling in difficult mining and geological conditions with a horizontal departure of more than 1200 m, as well as for drilling in areas of active clays

Ability to mineralize this system if necessary (formation aggression) with minimal cost for additional treatments

Due to the composition of inhibitory and acid-soluble inert colmatation additives, this type of solution has a number of advantageous characteristics

Reduction of well construction time by minimizing the time for wellbore development (preparation) for further work

Minimum impact on the productive reservoir, and as a consequence, reduction of well development time

Reducing the time factor on the impact of wellbore stability

Kem Bio Glims is a fresh biopolymer gypsum-lime inhibiting solution

The mud contains lime and balanced drilling gypsum, which are They are sources of calcium ions which allow drilling intervals without complications Rocks complicated by instability in interaction with water of calcareous crystalline high-colloidal clay, dolomite rocks, mudstones and siltstones.

► Stability of technological indicators and dispersing ability at moderate and high Pouring temperatures;

► Resistance to mineralized formation water aggression;

► Improved filtration and inhibition characteristics;

► High rate of penetration;

► High sedimentation stability of the drilling fluid.

Kem HT is a polymer solution for high downhole temperatures (100 °C)

Kem HT freshwater drilling fluids contain polymeric agents capable of maintaining optimum rheology and filtration parameters at high temperatures. Rheology and filtration at high temperatures.
It contains several differently acting clay swelling inhibitors.

► Ensuring stability of the borehole walls, reduction of mud production, prevention of packing in the interval of occurrence of soft active clayey rocks;

► Elimination of tool puffs and landings in the interval of active clay rocks;

► Ensuring the highest possible rate of penetration;

► Preventing partial absorption of drilling fluids in highly permeable formations;

► Prevention of differential sticking during drilling and running casing in the interval of permeable formations;

► Ensuring quality cementing of the well and separation of strata.

Kem SF - biopolymer inhibiting solution based on sodium formate

The ability to use a high-density base reduces the concentration of weighting agents;
The use of Kem SF with minimal solids allows for higher mechanical drilling rates and reduced contamination of the bottomhole zone of the pay formation;

► Sodium formate ions increase the lubricity of the fluid, which The sodium formate ions increase the lubricating power of the fluid and, in turn, enable it to be used for drilling extended-reach and horizontal wells;

► Formates have less negative impact on the environment compared to potassium, sodium and calcium chloride;

► Increased wellbore stability due to osmotic processes;

► Sodium formate salts in solution increase the thermal stability of polymers;

► Stably low drilling fluid filtration, due to the inability of many formation bacteria to survive in formate-ion-saturated mud.

Kem Save - Highly Inhibitory Saline Drilling Mud

This drilling fluid system is specifically designed for maximum inhibition of unstable clay formations;

► Contains polyamine swelling inhibitors of clays and shales, polyglycol-based inhibitors, modified latex inhibitors and others, in combination allowing for maximum inhibition coverage of various types of unstable rocks;

► The high salinity of the solution allows the use of less weighting agent to achieve the desired density of the solution, has a bactericidal effect;

► Inhibiting additives have an additional lubricating effect.

Kem oil / Kem vis oil — solution on the basis of diesel fuel / base oil

Due to their properties the mortars are optimal when drilling wells with a large step-out, when drilling small diameter wells, in complex directional wells;

► Absence of hydration and swelling of clay rocks;

► Increasing wellbore stability;

► Increasing the productivity of clayey sandstones;

► Reducing the complication in the process of drilling out evaporite deposits (salts, anhydrites, etc.);

► Reducing arbitrary wellbore expansion;

► Increasing the stability of drilling fluid properties;

► Low filtration at high temperatures and pressures;

► Increasing the stability of the drilling fluid against contamination.