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Preparation method of oil well cement for petroleum extraction

A technology for oil well cement and oil exploitation, which is applied in the directions of cement production, chemical instruments and methods, drilling compositions, etc., can solve the problems of poor performance of oil well cement slurry, ineffective use of high temperature and high pressure, etc. Good performance, easy to use for a long time

Inactive Publication Date: 2019-03-26
泸州高智知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing oil well cement slurry has poor performance and cannot be effectively used in high temperature, high pressure, and harsh environment oil exploitation. Problems with the use of cement

Method used

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Embodiment 1

[0021] A method for preparing oil well cement used in oil exploitation, comprising the following components in parts by weight: 35-48 parts of limestone, 24-31 parts of sandstone, 17-26 parts of converter slag, and 13-23 parts of spheroidized silicon powder , 8-17 parts of ordinary silicon powder, 39-48 parts of water, 23-36 parts of polyurethane elastomer, 19-26 parts of polyisocyanate, 13-24 parts of bentonite, 11-23 parts of biopolymer, and 9 parts of high molecular weight fiber derivatives ~17 parts, organic phosphate 11~25 parts, gypsum 34~47 parts.

[0022] A method for preparing oil well cement for oil exploitation, comprising the following components in parts by weight: 39-44 parts of limestone, 29-31 parts of sandstone, 19-25 parts of converter slag, 18-22 parts of spheroidized silicon powder, ordinary 10-15 parts of silicon powder, 41-46 parts of water, 25-33 parts of polyurethane elastomer, 21-25 parts of polyisocyanate, 15-22 parts of bentonite, 13-20 parts of biop...

Embodiment 2

[0025] The present invention comprises the following steps:

[0026] (1) mixing limestone, sandstone, converter slag with water, and grinding to make a slurry, stirring evenly at 50-60°C to make a slurry with a water content of 45-56%;

[0027] (2) dehydrating the slurry through a vacuum suction filter to form a filter cake with 12% to 15% moisture;

[0028] (3) Add filter cake, bentonite, spheroidized silicon powder, and ordinary silicon powder into the drying crusher, and after crushing, dry it into raw meal powder with a water content of 1 to 3%;

[0029] (4) Feed the raw meal powder into the rotary kiln after preheating and decomposing, and add polyurethane elastomer, polyisocyanate, biopolymer, high molecular weight fiber derivatives, organic phosphate and water, and use the kiln head burner to calcinate it into Oil well cement clinker;

[0030] (5) The oil well cement clinker and gypsum are mixed and ground, and the specific surface area is 260-285m 2 / kg to get the f...

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Abstract

The invention discloses a preparation method of oil well cement for petroleum extraction. The oil well cement comprises the following components in parts by weight: 35-48 parts of limestone, 24-31 parts of sandstone, 17-26 parts of converter slag, 13-23 parts of spheroidized silicon powder, 8-17 parts of ordinary silicon powder, 39-48 parts of water, 23-36 parts of polyurethane elastomer, 19-26 parts of polyisocyanate, 13-24 parts of bentonite, 11-23 parts of biopolymer, 9-17 parts of high-molecular-weight fiber derivatives, 11-25 parts of organic phosphate and 34-47 parts of gypsum. The cement slurry obtained by using the preparation method is better in performance and more suitable for a high-temperature and high-pressure rugged environment.

Description

technical field [0001] The invention relates to the petroleum field, in particular to a method for preparing oil well cement used in petroleum exploitation. Background technique [0002] With the continuous deepening of petroleum exploration and development, the number of wells with special requirements is gradually increasing, and the requirements for cementing are getting higher and higher. Only using conventional cement slurry systems can not only meet the cementing requirements of special wells such as gas storages, but also cannot solve various complex conditions encountered in the cementing process. The development of cement slurry systems with better comprehensive performance can effectively promote the cementing technology. development of. [0003] Gas well annulus under pressure is becoming more and more common, and the anti-gas channeling ability of cement slurry and the sealing quality and durability of cement sheath are getting more and more attention in the ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C09K8/467
CPCC04B7/21C09K8/467Y02P40/10
Inventor 赖惠蓉
Owner 泸州高智知识产权运营有限公司
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