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Novel reverse circulation drilling method

A drilling method and reverse circulation technology, applied in drilling equipment and methods, drilling compositions, chemical instruments and methods, etc., can solve problems such as difficulty in guaranteeing construction quality and drilling quality, and achieve hole formation good indicators

Pending Publication Date: 2020-08-18
CHINA RAILWAY NO 3 GRP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, it is difficult to guarantee the drilling quality under complex geological conditions, especially when multiple adjacent drilling operations are performed, the construction quality is difficult to guarantee

Method used

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  • Novel reverse circulation drilling method

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Embodiment 1

[0034] Such as figure 1 As shown, the present invention discloses a novel reverse circulation drilling method, comprising the following steps:

[0035] Step 1, setting a circulation tank; the circulation tank includes a slurry tank and a sedimentation tank, and the slurry tank is connected to the top of the sedimentation tank;

[0036] Step 2, configure the mud; the mud uses a bentonite composition, in terms of mass fraction, the bentonite composition includes 4-8 parts of bentonite, 0.004-0.008 parts of carboxymethyl cellulose, 0.1-0.4 parts of soda ash, ferrochrome wood 0.1-0.3 parts of sulfonic acid sodium salt dispersant, 0.003 parts of polyacrylamide flocculant, 100 parts of water; the bentonite composition also includes a weighting agent, and the weighting agent is barite, galena, perlite , at least one of limestone, the addition of the weighting agent is determined according to the soil density of the construction site;

[0037] Step 3, drilling; during the drilling o...

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Abstract

The invention belongs to the technical field of reverse circulation drilling, and particularly relates to a novel reverse circulation drilling method. The novel reverse circulation drilling method comprises the following steps of arranging a circulating pool, preparing slurry, drilling holes and detecting formed holes. The novel reverse circulation drilling method has the beneficial effects that the holes are not easy to collapse in the drilling process; the multiple adjacent holes do not influence one another during construction; and the hole forming index is good.

Description

technical field [0001] The invention belongs to the technical field of reverse circulation drilling, and in particular relates to a novel reverse circulation drilling method. Background technique [0002] With the development of society and the progress of construction technology, the scale of modern engineering construction continues to expand, and a large number of large-scale engineering projects such as long-span bridges have appeared, and the pile foundations supporting these giants are the most important foundation . [0003] Gas-lift reverse circulation drilling rigs are used in large-diameter ultra-deep pile foundations of large buildings on land, complex strata such as hard rock formations, pile foundation construction of ports and wharves, embankment protection pile construction, and bridge pile foundation construction in rivers, rivers, lakes, and seas. . It is an important substitute product for other piling equipment in the complex formation conditions such as...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B47/00E21B21/06E21B47/08E21B47/04E21B47/022C09K8/24
CPCC09K8/24E21B7/00E21B21/06E21B47/00E21B47/022E21B47/04E21B47/08
Inventor 隋中彬卜宪龙高磊郭美林宋士平乔晋通王涛方恒浩魏威向军安佳兴
Owner CHINA RAILWAY NO 3 GRP CO LTD
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