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    Drilling mud configuration method and proportion

    Addtime:2016-10-11

    Drilling mud configuration

    First, the choice of mud material

    (A) clay: the use of high-quality bentonite, its technical requirements are as follows:

    1, particle size: 200 mesh or more.

    2, water: not more than 10%

    3, pulping rate: not less than 10 meters 3 / ton.

    4, water loss: not more than 20ml / min.

    (B) water: water to carry out water quality testing, generally not more than 15 degrees of soft water, over time must be softened.

    (C) hydrolysis of polyacrylamide: the choice of hydrolysis of polyacrylamide to choose dry powder, anionic, molecular weight of not less than 5 million, 30% degree of hydrolysis.

    (D) hydrolysis of polyacrylonitrile: the choice of hydrolysis of polyacrylonitrile to choose dry powder, anionic, molecular weight of 10 to 20 million, degree of hydrolysis of 55 to 65%.

    (5) soda ash (Na2CO3): bentonite decalcification treatment to improve its performance

    (6) potassium humate: black powder selected 20-100 mesh the best

    Second, the preparation and use

    (A) per cubic mud in the basic ingredients:

    1, bentonite: 5% to 8%, 50 ~ 80kg.

    2, soda ash (NaCO3): soil volume of 3% to 5%, 1.5 to 4kg of soda ash.

    3, hydrolyzed polyacrylamide: 0.015% to 0.03%, 0.15 to 0.3 kg.

    4, hydrolyzed polyacrylonitrile dry powder: 0.2% ~ 0.5%, 2 ~ 5kg hydrolyzed polyacrylonitrile dry powder.

    In addition, according to the formation situation, each cubic meter of mud by adding 0.5 ~ 3kg of anti-slip agent, plugging agent, loss of water agent. Such as the Quaternary formation is easy to collapse and expansion, adding about 1% of the anti-slip agent and about 1% of potassium humate.

    (B) the preparation process:

    Under normal circumstances, drilling into the 1000m drilling about 50m3 of mud. Now to prepare 20m3 mud as an example, that "double mud" the preparation process is as follows:

    1, 30 ~ 80kg of soda ash (NaCO3) into 4 meters 3 water and then mix well after adding 1000 ~ 1600kg bentonite mix well after soaking for more than two days.

    2, before the use of the mud soaked good mud to dilute the dough into 20 meters 3 of the base pulp.

    3, 3 ~ 6kg hydrolyzed polyacrylamide dry powder dissolved in water and then added to the base pulp, 40 ~ 100kg hydrolysis of polyacrylonitrile dry powder diluted with water dissolved in the base slurry.

    4, all added after the mix evenly

    (C) performance testing

    Before using the mud to test the various properties of the test, the parameters should meet the following criteria:

    Solid content: less than 4%

    Specific gravity (r): less than 1.06

    Funnel viscosity (T): 17 to 21 seconds

    Loss of water (B): less than 15 ml / 30 minutes

    Mud cake (K): <1mm

    Sand content: <1%

    PH value: 7.5 ~ 8.5

      

    Drilling mud per kilometer of ingredients

    First, clay:

    Selection of high-quality bentonite, its technical requirements are as follows:

    1, particle size: 200 mesh or more.

    2, water: not more than 10%

    3, pulping rate: not less than 10 meters 3 / ton.

    4, water loss: not more than 20ml / min.

    5, the amount: 3000 ~ 4000kg.

    Second, soda ash (NaCO3): 150kg

    Third, the election of water: water to carry out water quality testing, generally not more than 15 degrees of soft water, such as over time must be softened.

    Fourth, hydrolysis of polyacrylamide:

    1, the choice of hydrolysis of polyacrylamide to choose dry powder, anionic, molecular weight of not less than 5 million, 30% degree of hydrolysis.

    2, the amount: 25kg.

    Five, hydrolyzed polyacrylonitrile:

    1, the choice of hydrolysis of polyacrylonitrile to choose dry powder, anionic, molecular weight of 10 to 20 million, degree of hydrolysis 55 to 65%.

    2, the amount: 300kg.

    6, other spare materials:

    1, ST-1 anti-settling agent: 25kg.

    2,801 Sealing agent: 50kg.

    3, potassium humate (KHm): 50kg.

    4, NaOH (caustic soda): 10kg.

    5, plugging with inert materials (sawdust, cottonseed skin, etc.): 250kg.

     

    Composite low solid phase anti - collapse mud

    First, the characteristics

    1, good mobility, carrying rock powder ability.

    2, mud treatment is simple, easy maintenance, stable performance, long life cycle.

    3, wide applicability, both in the loose, broken, collapsed in the formation of the block, but also in the mud-like rock and water-sensitive rock formation. Can be suitable for different rock wall requirements.

    4, easy preparation, no heating, without pre-soaking, just two low solid phase mud simply mix, stir enough.

    5, the kind of composite anti-collapse mud in addition to anti-collapse effect, but also has the role of collapse.

    Second, the composite low solid phase anti-collapse mud preparation

    A liquid: polyacrylamide (PAM) - potassium chloride (KCl) low solid phase anti-collapse mud

    1, bentonite 20%.

    2, soda ash (Na2CO3) 0.5%.

    3, potassium carboxylate sodium (Na-CMC) 0.4%.

    4, polyacrylamide (PAM molecular weight of 12 million units) 0.1%.

    5, potassium chloride (KCl) 1%.

    B solution: potassium humic acid (KHm) low solid phase anti-collapse mud

    1, bentonite 3%.

    2, soda ash (Na2CO3) 0.5%.

    3, humic acid potassium (KHm) 2.0% ~ 3.0%.

    4, polyacrylamide (PAM molecular weight of 12 million units) 0.1%.

    When used will be prepared A liquid, B liquid by volume ratio of 1: 1 mixed and can be fully stirred.

    Analysis on the Wall Protection Mechanism of Compound Low Solid Phase Anti - collapse

    A liquid is polyacrylamide (PAM) - potassium chloride (KCl) low solid phase anti-collapse mud, is a good anti-collapse performance of high quality mud. PAM and KCl combined, can effectively inhibit the hydration of water-sensitive strata expansion, for drilling water-sensitive strata has a very good protective effect. It is the first time in the water-sensitive strata exposed, effectively inhibiting the hydration of the rock formation, thus preventing the collapse of the hole wall.

    B solution is potassium humic acid (KHm) low solid phase anti-collapse mud, is a good anti-collapse performance of high quality mud. KHm is a high quality mud treatment agent, it has reduced water, dilute the dispersion, to prevent the collapse of the hole wall and reduce and prevent the role of mud in the drill.

    First, the humic acid potassium (KHm) low solid-phase anti-collapse mud in the hole during the cycle, through the hole in the high-speed rotary pipe, mud humic acid potassium and clay under the action of centrifugal force can be broken into the loose fracture layer, Loose fractured rock layer from the cementing reinforcement, and in the first time to prevent moisture on the hole wall penetration and soaking. Second, the hole wall exists in the gap and depression, mud in the clay and KHm in the role of centrifugal force will be filled into the gap and depression to, and then strengthen and repair the hole wall. Finally, the humic acid potassium (KHm) low solid phase anti-collapse mud in the hole cycle to a certain time, can gradually form a thin layer of thin and tough wall, dense, smooth mud, this layer of mud to further prevent the formation of The water on the hole wall of the bubble and erosion, while playing the role of reinforcement hole wall. Smooth mud on the drill has the role of drag reduction, to prevent the resistance caused by excessive drilling vibration of the hole wall of the mechanical damage.

    When A and B liquid in the volume ratio of 1: 1 mixed in the same mud system, A liquid in the first time to inhibit the "tectonic crushing mud" rock hydration expansion, B liquid in the first time Inside the "loose, broken" rock form to dialysis, cementation. With the mixture in the hole for a long time cycle, B liquid in the full-hole gradually formed mud, which gradually played a major wall anti-collapse effect.

    Potassium humate + CMC mud

    First, mud formula

    1, bentonite 5% ~ 7.5%.

    2, soda ash (Na2CO3) soil volume of 3% to 5%.

    3, humic acid potassium 0.15% to 0.25%.

    4, CMC 0.3% to 0.6%.

    Second, the mud performance

    1, funnel viscosity 22 ~ 24.

    2, water loss of 8 to 12.

    3, the proportion of 1.15 ~ 1.2.

    4, PH value of 9 to 10.

    Broad spectrum wall former mud

    First, mud formula

    1, bentonite 5% to 10%.

    2, soda ash (Na2CO3) soil content of 4% to 6%.

    3, broad spectrum fence 0.3% to 0.6%.

    Second, the mud performance

    1, funnel viscosity 22 to 26.

    2, water loss 10 ~ 15.

    3, the proportion of 1.15 ~ 1.25.

    4, PH value of 9 to 10.

    Plugging agent mud

    First, mud formula

    1, bentonite 5% ~ 7.5%.

    2, soda ash (Na2CO3) soil volume of 3% to 5%.

    3, plugging agent 0.3% to 0.7%.

    Second, the mud performance

    1, funnel viscosity 20 ~ 22.

    2, water loss 10 ~ 15.

    3, the proportion of 1.15 ~ 1.20.

    4, PH value of 9 to 10.