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Ultrahigh-density drilling fluid

An ultra-high-density drilling fluid technology, applied in the field of drilling fluid, can solve the problems of drill bit and pump wear, achieve the effects of reducing wear, high filling rate, and ensuring abutment strength

Pending Publication Date: 2022-07-05
天津泽希新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is: in order to solve the problem that the traditional ultra-high density drilling fluid wears more seriously on drilling tools, drill bits and pumps, and proposes an ultra-high density drilling fluid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see Figure 1-3 , the present invention provides a kind of technical scheme:

[0042] An ultra-high density drilling fluid is composed of the following components by weight: 50 parts of weighting agent modified spherical iron oxide, 20 parts of cement, 20 parts of water, 0.1 part of defoamer, 0.15 part of solid fluid loss reducer, 0.1 part of liquid water loss reducer, 0.2g of dispersant, 1g of retarder, 0.05 part of coarse silica fume, 0.1 part of expansion agent, and 0.1g of anti-channeling enhancer;

[0043] The preparation method of the modified spherical iron oxide specifically comprises the following steps:

[0044]S101. Dissolve hematite powder and modified polyethylene glycol in distilled water, add ammonium carbonate solution and sodium dodecyl sulfonate solution slowly dropwise under ultrasonic vibration, after obtaining colloid, add distilled water and sewage ethanol After alternate washing and vacuum drying for a period of time, nano-scale modified spheric...

Embodiment 2

[0049] Different from Embodiment 1, this embodiment also discloses an ultra-high density drilling fluid, which is composed of the following components by weight: 65 parts of weighting agent modified spherical iron oxide, 40 parts of cement, 24 parts of water, 0.15 part of defoamer, 0.20 part of solid water loss reducer, 0.2 part of liquid water loss reducer, 15g of dispersant, 15g of retarder, 0.8 part of coarse silicon powder, 0.2 part of expansion agent, and 0.2g of anti-channeling enhancer;

[0050] The preparation method of the modified spherical iron oxide specifically comprises the following steps:

[0051] S101. Dissolve hematite powder and modified polyethylene glycol in distilled water, add ammonium carbonate solution and sodium dodecyl sulfonate solution slowly dropwise under ultrasonic vibration, after obtaining colloid, add distilled water and sewage ethanol After alternate washing and vacuum drying for a period of time, nano-scale modified spherical iron oxide par...

Embodiment 3

[0056] What is different from Examples 1-2 is that this example discloses an ultra-high density drilling fluid, which is composed of the following components by weight: 80 parts of weighting agent modified spherical iron oxide, 60 parts of cement, and 28 parts of water. , 0.2 part of defoamer, 0.25 part of solid water loss reducer, 0.3 part of liquid water loss reducer, 25g of dispersant, 10g of retarder, 0.15 part of coarse silicon powder, 0.3 part of expansion agent, and 0.3g of anti-channeling enhancer;

[0057] The preparation method of the modified spherical iron oxide specifically comprises the following steps:

[0058] S101. Dissolve hematite powder and modified polyethylene glycol in distilled water, add ammonium carbonate solution and sodium dodecyl sulfonate solution slowly dropwise under ultrasonic vibration, after obtaining colloid, add distilled water and sewage ethanol After alternate washing and vacuum drying for a period of time, nano-scale modified spherical i...

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Abstract

Belonging to the technical field of drilling fluids, the invention discloses an ultrahigh density drilling fluid, which is composed of the following components by weight: 50-80 parts of weighting agent modified spherical iron oxide, 20-60 parts of cement, 20-28 parts of water, 0.1-0.2 part of an antifoaming agent, 0-0.25 part of a solid fluid loss agent, 0-0.3 part of a liquid fluid loss agent, 0.2-25g of a dispersant, 0-10g of a retarder, 0-0.15 part of coarse silicon powder, 0-0.3 part of an expanding agent, and 0-0.3 part of an anti-channeling enhancer. According to the method, the abutting strength of the surface of iron oxide particles is guaranteed, abrasion to the surface of the drill bit is reduced through the surface standing effect of polyethylene glycol, crystallization is easy, large phase change enthalpy is achieved, although a liquid state can be generated in the phase change process, spherical iron oxide has scientific particle size distribution and is classified according to meshes, and small particles and large particles are mixed; the small particles are high in filling rate and good in flowability, and can be used for preparing the drilling fluid with higher density, and meanwhile, the fluid is prepared to reduce water loss.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid, and in particular relates to an ultra-high density drilling fluid. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. Also known as drilling flushing fluid. Drilling fluid can be divided into clear water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to the composition. Clear water is the earliest drilling fluid that requires no treatment and is easy to use. It is suitable for complete rock formations and areas with sufficient water sources. Mud is a widely used drilling fluid, which is mainly suitable for unstable rock formations such as loose, developed fractures, easy to collapse and drop blocks, and water swelling and spalling. [0003] Drilling fluid consists of dispersing medium, dispersing phase and additives. The additive is generally a weighting agent. The function of weighti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/22C09K8/14
CPCC09K8/22C09K8/14
Inventor 高伟
Owner 天津泽希新材料有限公司
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