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A method for preparing unburned bricks from offshore drilling waste mud

A waste mud and offshore drilling technology, which is applied in the field of resource utilization of drilling waste, can solve the problems that the land process cannot be completely copied, and achieve the effect of solving the problem of safe and environmentally friendly disposal, reducing the average pore size, and accelerating the hydration reaction speed

Active Publication Date: 2022-06-21
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high salt content of waste mud from offshore drilling, the onshore process cannot be completely copied

Method used

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  • A method for preparing unburned bricks from offshore drilling waste mud
  • A method for preparing unburned bricks from offshore drilling waste mud
  • A method for preparing unburned bricks from offshore drilling waste mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing non-burning bricks with waste mud from offshore drilling, comprising the following steps:

[0020] First, the block filter cake after landing is dried at 105℃±5℃ until the moisture content is less than 5%, crushed to below 6mm by a jaw crusher, then ball milled by a ball mill, and sieved with an 80-mesh square-hole sieve to The particle size is less than 0.5mm, and finally, under the condition of liquid-solid ratio of 4, washing with water for 30min, the chloride ion in the raw material is quickly removed, and the base material for making bricks is obtained. The chemical composition analysis of the base material is shown in Table 1.

[0021] Table 1 Chemical composition table of base materials

[0022]

[0023] As shown in Table 1, the main chemical component in the base material is SiO 2 , Al 2 O 3 , with the chemical components for the preparation of non-burning bricks. At the same time, the particle size is basically below 0.5mm, which ...

Embodiment 2

[0027] A method for preparing non-burning bricks with waste mud from offshore drilling, the same as Example 1, with the difference: when preparing dry mixture, the mass percentage of each component is 10% base material, 20% cement, 8% coarse aggregate, 57% ..5% fine aggregate, 4% gypsum and 0.5% polyvinyl alcohol.

Embodiment 3

[0029] A method for preparing non-burning bricks with waste mud from offshore drilling, the same as Example 1, with the difference: when preparing dry mixture, the mass percentage of each component is 15% base material, 20% cement, 8% coarse aggregate, 52.5% % fine aggregate, 4% gypsum and 0.5% polyvinyl alcohol.

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Abstract

The invention discloses a method for preparing non-burning bricks from offshore drilling waste mud. The steps are as follows: S1. Solid-liquid separation is performed on the offshore drilling waste mud, and the solid phase is dehydrated by pressure filtration to obtain a filter cake; S2. The filter cake is passed through drying, crushing, ball milling, and washing to remove chloride ions to obtain the base material; S3, adding cement, gypsum, polyvinyl alcohol, and aggregates to the base material, mixing evenly to obtain a mixture, adding water to the mixture to obtain a semi-dry aggregates; aggregates include coarse aggregates and fine aggregates; coarse aggregates are crushed pebbles, the particle size distribution is between 5mm and 10mm, and the bulk density is 1663kg / m 3 ; The fine aggregate is river sand with a fineness modulus of 2.4. S4. The semi-dry mixture is made into adobe, and after the adobe is demoulded, it is naturally cured for 28 days to obtain an unfired brick. The preparation method of the invention realizes the problems of safe and environment-friendly disposal and resource comprehensive utilization of the waste mud from offshore drilling.

Description

technical field [0001] The invention relates to the technical field of resource utilization of drilling waste, in particular to a method for preparing non-burning bricks with waste mud from offshore drilling. Background technique [0002] The ocean contains abundant oil and gas resources, and the efficient development of offshore oil and gas is of decisive significance to alleviate my country's energy crisis. During the drilling operation of offshore oil and gas fields, a large amount of drilling waste mud is inevitably generated, which is mainly composed of bentonite, barite and mud treatment agent. If it is directly discharged into the sea, it will cause great damage to the marine environment. The Bohai Sea belongs to the first-class sea area, and the drilling waste of offshore oil and gas fields is not allowed to be directly discharged into the sea. Therefore, the waste mud from offshore drilling must be treated at sea and then transported back to the inland for disposal....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B111/20
CPCC04B28/14C04B2201/50C04B2111/20C04B2111/00017C04B7/04C04B18/16C04B14/02C04B14/06C04B24/2623
Inventor 刘文士李茂川王豪何冬雪熊兴洋王波肖笑刘钰
Owner SOUTHWEST PETROLEUM UNIV
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