Nanometer composite heat resisting fluid loss reducing agent and its prepn

The technology of a fluid loss reducer and nano-composite material is applied in the field of fluid loss reducer and its preparation, which can solve the problems of unsatisfactory fluid loss reduction effect, poor resistance to salt and calcium pollution, etc., and improve physical and mechanical properties. , Eliminate hydration swelling, improve the effect of salt resistance

Inactive Publication Date: 2007-08-22
CNPC DRILLING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the high-temperature fluid loss reducers widely used in China include sulfomethyl lignite (SMC), sulfonated phenolic resins SMP-1 and SMP-2, sulfonated lignin sulfomethylphenolic resins (SLSP), hydrolyzed polypropylene Nitrile (HPAN), condensate of phenolic resin and humic acid (SPNH) and copolymer of acrylic acid and acrylamide, etc., still have some or other deficiencies in practical application. These commonly used treatment agents are not very effective in reducing fluid loss. Ideal, its resistance to salt and calcium pollution is poor

Method used

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  • Nanometer composite heat resisting fluid loss reducing agent and its prepn
  • Nanometer composite heat resisting fluid loss reducing agent and its prepn
  • Nanometer composite heat resisting fluid loss reducing agent and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of organic montmorillonite

[0035]Based on the cation exchange capacity (CEC) of the montmorillonite base slurry, prepare a corresponding concentration of cetyltrimethylammonium chloride (CTAC) solution, mix it with the montmorillonite base slurry in a beaker, and place it in a water bath at 80°C. Stir vigorously in medium for 2-4 hours (hours), let it stand overnight, remove the upper layer solution, filter, wash with deionized water until there is no Cl- (tested with a solution with a concentration of 0.01mol / L AgNO3), dry in a vacuum oven, and crush 200-300 mesh sieve to obtain organic montmorillonite (O-MMT).

[0036] 2. Synthesis of dithioα-naphthoic acid isobutyronitrile (DTE) chain transfer agent

[0037] Its synthetic route is:

[0038]

[0039] ①In a dry 250mL three-necked bottle, add 2.67g (0.11mol) of magnesium chips, install a condenser tube with anhydrous calcium chloride drying tube, plug the other port of the three-necked bottle, and ...

Embodiment 2

[0046] The preparation and synthesis of organic montmorillonite and dithioα-naphthoic acid isobutyronitrile (DTE) chain transfer agent are the same as in Example 1.

[0047] ①In a three-necked flask equipped with a thermometer and a mechanical stirrer, the molar ratio of St, DTE and AIBN is 200:1:0.2, and O-MMT is added in a ratio of 2% by mass of styrene monomer. After sealing, , the air in the system was removed by freezing and vacuuming, filled with nitrogen, and circulated for 3 times, fully stirred under the protection of nitrogen, and reacted in an oil bath at 150°C. After reacting for 2 hours, the reaction system was cooled with an ice-water bath, and the product was precipitated in acetone, filtered, and then vacuum-dried to obtain a polystyrene / montmorillonite (PSt / O-MMT) nanocomposite macromolecular chain transfer agent.

[0048] ②In a three-necked flask equipped with a thermometer and a mechanical stirrer, add the PSt / O-MMT nanocomposite macromolecular chain transfe...

Embodiment 3

[0050] The preparation and synthesis of organic montmorillonite and dithioα-naphthoic acid isobutyronitrile (DTE) chain transfer agent are the same as in Example 1.

[0051] ①In a three-necked flask equipped with a thermometer and a mechanical stirrer, the molar ratio of St, DTE and AIBN is 600:1:0.6, and O-MMT is added in a ratio of 10% by mass of styrene monomer. After sealing, , the air in the system was removed by freezing and vacuuming, filled with nitrogen, circulated 3 times, fully stirred under the protection of nitrogen, and reacted in an oil bath at 100°C. After reacting for 4 hours, the reaction system was cooled with an ice-water bath, and the product was precipitated in a methanol / water mixed solution (volume ratio 90 / 10), filtered and then vacuum-dried to obtain a polystyrene / montmorillonite (PSt / O-MMT) nanocomposite type macromolecular chain transfer agent.

[0052] ②In a three-necked flask equipped with a thermometer and a mechanical stirrer, add the PSt / O-MMT...

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PUM

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Abstract

The present invention discloses one kind of nanometer composition heat resisting filtration reducing agent and its preparation process. The nanometer composition filtration reducing agent is synthesized through a reverse addition-fracturing chain transferring (RAFT) process, and has nanometer montmorillonite layer dispersed inside amphiphilic block polymer base. The organic combination between rigid and stable montmorillonite and flexible block polymer makes the nanometer composition filtration reducing agent possess high physical and mechanical performance and high heat stability. It is used as drilling fluid treating agent and has obvious filtration reducing effect at high temperature and high pressure.

Description

technical field [0001] The invention relates to a drilling fluid treatment agent, in particular to a fluid loss reducer capable of reducing the fluid loss of drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid technology is an important part of oil and gas drilling engineering technology. During the drilling process, the drilling fluid plays the functions of carrying and suspending cuttings, stabilizing the well wall and balancing the formation pressure, cooling and lubricating the drill bit and drilling tools, and transmitting hydraulic power, thus ensuring the smooth progress of oil and gas drilling. Among them, the treatment agent is the core component of the drilling fluid, which is used to improve and stabilize the performance of the drilling fluid, or a chemical additive added to meet a certain performance of the drilling fluid. Often a small amount of addition will have a great impact on the performance of the drilling fluid. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
Inventor 屈沅治孙金声苏义脑王奎才
Owner CNPC DRILLING RES INST
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