Hole sealing material of potassium-magnesium salt mine drilling holes and hole sealing method thereof

A technology of sealing material and potassium magnesium salt, which is applied in the field of salt mine exploration, can solve the problems that clay balls cannot be thrown into the bottom of the hole, it is difficult to guarantee the quality of sealing holes, and there are hidden dangers in the quality of sealing holes, so as to achieve good resistance to rock salt and brine Corrosion performance, low cost, fast setting effect

Inactive Publication Date: 2012-06-27
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of throwing clay balls, due to the small diameter of the drilled hole, the clay balls are often bridged in the hole, and the clay balls cannot be thrown to the bottom of the hole, and the sealing of the hole is not tight.
Therefore, this method has high technical requirements and difficult construction, and it is difficult to ensure the quality of sealing holes; in addition, in the exploration process using magnesium chloride aqueous solution as drilling fluid, ordinary Portland cement is directly added to the waste drilling circulating fluid, Then pump the mixture of drilling circulating fluid and ordinary Portland cement into the hole to seal the hole. Although this method is relatively tight, the result is the same as that of the directly used Portland cement method. , with the corrosion of ordinary Portland cement in rock salt, there will be hidden dangers in the quality of drilling holes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 A kind of sealing material of potassium-magnesium salt mine drilling, this material is mixed by the raw material of following weight ratio: drilling circulation fluid 2170kg used for drilling potassium-magnesium salt mine, aggregate 1000kg, magnesium oxide 450kg, 0.5kg of anti-water agent.

[0023] Among them: aggregate refers to rock salt with particle size φ≤10mm; magnesia is active magnesia powder; water-resistant agent is phosphoric acid; the composition of the drilling circulating fluid used for drilling potassium-magnesium salt mines is: water 1519kg, magnesium chloride 471kg, Potassium chloride 60kg, sodium chloride 40kg, bentonite 80kg.

[0024] The sealing method of the sealing material comprises the following steps:

[0025] (1) Drilling circulating fluid used in potassium-magnesium salt mine drilling is pumped into the mud mixing tank from the mud pool with a mud pump.

[0026] (2) In the mud mixing tank with drilling circulating fluid, add agg...

Embodiment 2

[0028] Embodiment 2 A kind of sealing material for drilling holes in potassium-magnesium salt mines, which is formed by stirring and mixing raw materials in the following weight ratios: 2210 kg of drilling circulating fluid used in drilling potassium-magnesium salt mines, 800 kg of aggregate, magnesium oxide 160kg, 3kg of anti-water agent.

[0029] Among them: Aggregate refers to gypsum salt with particle size φ≤10mm; Magnesium oxide is active magnesium oxide powder; Water-resistant agent is superphosphate.

[0030] The composition of the drilling circulation fluid used in the drilling of potassium-magnesium salt mines is: 1540kg of water, 450kg of magnesium chloride, 35kg of potassium chloride, 25kg of sodium chloride, and 160kg of bentonite.

[0031] The sealing method of the sealing material is the same as in Example 1.

Embodiment 3

[0032] Embodiment 3 A kind of sealing material of potassium-magnesium salt mine drilling, this material is mixed by the raw material of following weight ratio: 2040kg of drilling circulating fluid used in drilling of potassium-magnesium salt mine, aggregate 240kg, magnesium oxide 120kg and 1kg of anti-water agent.

[0033] Among them: aggregate refers to gravel with particle size φ≤10mm; magnesium oxide is active magnesium oxide powder; water-resistant agent is diammonium phosphate.

[0034] The composition of the drilling circulating fluid used in the drilling of potassium magnesium salt mine is: 1020kg of water, 620kg of magnesium chloride, 80kg of potassium chloride, 50kg of sodium chloride, 300kg of bentonite and 10kg of carboxymethyl cellulose.

[0035] The sealing method of the sealing material is the same as in Example 1.

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Abstract

The invention relates to a hole sealing material of potassium-magnesium salt mine drilling holes. The material is prepared by stirring and mixing the following raw materials in percentage by weight: 60-85% of drilling circulation liquid used by the potassium-magnesium salt mine drilling hole, 10-30% of aggregate, 5-20% of magnesium oxide, and 0.01-0.1% of water-repellent agent. The invention further provides a hole sealing method using the hole sealing material. The hole sealing material provided by the invention fully uses the wasted drilling circulation liquid, saves energy and is environment-friendly; the hole sealing material has a fast condensation speed, and has certain plasticity and expansion performance at the early period; the hole sealing material can be closely combined with a well wall, and can prevent the water from infiltrating to corrode the well wall; and the material has high later strength, and has excellent corrosion resistant performance of resisting halite and brine.

Description

technical field [0001] The invention relates to the technical field of salt mine exploration, in particular to a hole-sealing material and a hole-sealing method for drilling holes in potassium-magnesium salt mines. Background technique [0002] In the past, domestic geological exploration of salt mines did not pay much attention to drilling and sealing. Since most of the soluble salt deposits are liquid deposits, although there are some solid soluble salt deposits, they are all exploited in water solution. There is little impact on safety, so cement slurry is used for sealing the potassium chloride and sodium chloride exploration holes. In the traditional sealing method of salt mines, ordinary Portland cement is used for sealing holes, but rock salt containing a large amount of chloride ions has a strong corrosive effect on ordinary Portland cement. Mineral deposits, especially potassium-magnesium salt deposits, have great risks. The success or failure of drilling and seali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42E21B33/13
Inventor 曾金波马海州山发寿
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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