Process for manufacturing well-drilling casing pipe of ice layer

A manufacturing process and drilling casing technology, which is applied in the field of ice layer drilling casing manufacturing technology, and can solve problems such as poor sealing effect of casing, environmental pollution, drilling fluid leakage, etc.

Inactive Publication Date: 2013-11-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the sealing effect of the casing

Method used

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  • Process for manufacturing well-drilling casing pipe of ice layer
  • Process for manufacturing well-drilling casing pipe of ice layer
  • Process for manufacturing well-drilling casing pipe of ice layer

Examples

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Embodiment 1

[0014] The structure of the present invention is illustrated in conjunction with the accompanying drawings. Figure 1 ~ Figure 3 Middle, 1. Snow accumulation-snow layer; 2. Ice layer; 3. Hot-melt bit; 4. Icicle; 5. Ice casing. Before conducting conventional ice drilling, first use the hot-melt drill bit to drill from the snow-snow layer to the ice layer. During the drilling process of the hot-melt drill bit, the snow-snow layer drilled by the drill bit melts into water, and the The hot-melt bit is raised from the bottom of the well to the surface, such as figure 1 Shown; After the hot-melt drill bit stops working, the water that melts into the snow-snow layer freezes into icicles and fuses with the ice layer into an impermeable whole, as figure 2 Shown; Drilling operations are carried out on the ice column (drilling diameter is smaller than the diameter of the ice column) to form an ice casing, such as image 3 shown.

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Abstract

The invention discloses a process for manufacturing a well-drilling casing pipe of an ice layer, and belongs to the technical field of ice layer well drilling. According to the process for manufacturing the well-drilling casing pipe of the ice layer, before conventional ice layer well drilling is carried out, firstly a hot-melting drill bit is used for drilling into the ice layer from an accumulated snow-snow layer in a hot-melting mode, in the process of drilling of the hot-melting drill bit, the accumulated snow-snow layer drilled by the drill bit is melted into water, and the hot-melting drill bit is lifted to the earth surface from the well bottom; after the hot-melting drill bit stops working, the water melted from the accumulated snow-snow layer is frozen into an impermeable whole ice column melted with the ice layer; conventional ice layer well-drilling working is carried out on the whole ice column to form the ice casing pipe, wherein the well-drilling diameter is smaller than that of the ice column. The ice casing pipe manufactured by means of the process has the advantages of isolating the accumulated snow-snow layer, preventing well-drilling liquid from leaking and protecting the environment.

Description

technical field [0001] The patent of the present invention belongs to the technical field of ice drilling, and in particular relates to the manufacturing process of drilling casings for ice formations. Background technique [0002] Casing strings are widely used in oil drilling, core drilling and ice drilling because of their functions of protecting, sealing off complex formations and stabilizing well walls. In oil drilling and core drilling, steel round pipes are often used as casings and fixed on the well wall with cement; in ice drilling, round pipes made of plastic and aluminum alloy are mainly used as casings, and cement is not used. Adhesives such as cement fix it on the well wall. In ice drilling, circular casings made of plastic and metal are not recycled after each use, so the cost is high; when working on glaciers, it is inconvenient to transport due to the complex terrain; because the end of the casing sits directly on the shoulder of the well Or use casing shoe...

Claims

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Application Information

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IPC IPC(8): E21B7/14
Inventor 达拉拉伊·帕维尔洪嘉琳曹品鲁郑治川张楠王如生塞索耶夫·米哈伊尔宫达薛军
Owner JILIN UNIV
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