SU1098950A1 - Potassium-based drilling mud - Google Patents

Abstract

CALIUM DRILLING SOLUTION containing clay, T-66 reagent, potassium chloride, filtering agent, water, and water, characterized in that, in order to increase the inhibitory capacity of the solution while reducing its cost, it contains carbon alkaline reagent (UShR) as a filtering agent with the following ratio of ingredients, w.ch .: 5.0-40.0 Clay Reagent T-66 3.0-20.0 Carbon-alkaline reagent (UShR) 3.0-10.0 § Potassium chloride 3.0-15, 0% of the amount of the desire is 1.0-45.0 (About 48.0-85.0 Water

Description

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CD 01 Ieobre, the flow relates to the field of drilling, namely the composition of drilling fluids. A well-known drilling fluid containing 0.02% calcium chloride, used for crushing stable sediments and refers to solutions with a low solids content, moreover, has good rheological indicators, which leads to an improvement in technical and economic indicators of drilling Cl J “However, this drilling fluid does not have an inhibitory effect, although it contains an electrolyte. The reason is that all the calcium chloride binds to the gums and forms insoluble calcium hydromate compounds. This solution also cannot be used when drilling unstable clays. The closest technical solution to the invention is a potassium drilling fluid that contains clay, T-66 reagent, potassium chloride, a filtration reducer, weir and water and is an effective solution when drilling unstable clays 2 3. However, to regulate filtering the properties of the known solution require expensive and scarce reagents - filtering agents CMC KSCB, starch, etc. Replacing the deficient reagents in the potassium solution system with available and inexpensive ones is a very important and urgent task. The aim of the invention is to increase the inhibitory ability of a thief while making it cheaper. This goal is achieved by the fact that potassium drilling mud containing clay, reagent T-66, potassium chloride, filtering agent, water, and water, as the filtering agent contains alkaline reagent carbon (UShR) with the following ratio of ingredients, wt. : Clay5.0-40.0 Reagent T-66 3.0-20, O Carciferous Reagent (UShR) 3.0-10.0 Potassium Chloride 3.0-15.0 Ut Deshaler 1.0-45.0 Water48 , 0-85.0 The introduction of electrolyte into the proposed drilling mud was made possible by the flotation reagent T-66, which was previously known as a defoamer in solutions, containing lignosulfonate their reagents (PRS CSSC, FHLS et al.) since muds / humates not based foams t, and in this case it has been introduced to protect USCHR from the electrolyte attack. The technology of preparation of the proposed drilling mud is as follows. First, for thorough mixing, a high-speed bentonite (clay) of 30 g, a USR of 5 g and a T-66 reagent of 1 g are loaded into a high-speed mixer (h 1000 rpm), stirred for 2 hours. Then 5 g of potassium chloride is added to the mixture and 1 g ut of the gel to the desired density. After all additions, the solutions are thermostated for 1 hour at EZ-SUO C. All standard parameters are measured in the cooled solutions. The remaining solutions are prepared similarly. The composition and properties of potassium drilling mud are given in the table. The range of clay content in solutions 1-4 is determined. The lower limit of clay content is 5 mph, since below this value the solutions lose structural and mechanical properties () and cannot be used in practice, the upper limit is 40 May, .h. , because above this limit the solutions have very high rheological and structural-mechanical characteristics. The range of additives of T-66 reagent in solutions 5-8 is determined. As shown in the table, the lower limit of the T-66 flotation reagent content in the solution is 5 mas.h., below this value, the T-66 flotation reagent does not have a noticeable effect on the technological properties of the solution. The upper limit is 20 ma.h., above this limit, it is impractical to maintain the content of T-66 flotation reagent in the solution, since the cost of treatment will prevail over the efficiency in regulating the parameters of the solution. The lower limit of the content of the PRT is 3 mas.ch., below this value the filtration of the solution exceeds 8 cm, and the upper limit is 10 mas.ch. A further increase in the amount of CCl in the solution is impractical, since the filtration value is slightly reduced.

and the cost of the solution increases.

The range of content of other components in the solution was chosen based on the technological and economic 5 imaginations.

Thus, the proposed drilling fluid is highly inhibited, containing up to 15 wt.h. potassium chloride, in addition, is not required for the stabilization of expensive reagents (CMC, QSCB, oxyl, etc.).

Table continuation

Claims (1)

POTASSIUM DRILLING MIXTURE containing clay, T-66 reagent, potassium chloride, filtration reducer, weighting agent and water, characterized in that, in order to increase the inhibitory ability of the solution while reducing its cost, it contains a carbon-alkaline reagent (U1CR) with the following ratio of ingredients, Clay Reagent T-66 Carbon-alkaline reagent (USR) Potassium chloride Weighting agent Water C © oo ©