Vertical shaft multipurpose hydrological hole and construction method thereof
A hydrological and vertical well technology, which is applied in earthwork drilling, wellbore/well components, and production fluids, etc., and can solve problems such as vertical well hydrological holes affecting construction progress, etc.
Pending Publication Date: 2020-12-04
CHINA COAL FIRST CONSTR +1
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Problems solved by technology
[0004] The invention proposes multiple hydrological holes for shafts and its construction method, which solves the problem that the setting of hydrological holes for shafts affects the construction progress in the prior art
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[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all involve the protection scope of the present invention.
[0038] Such as Figure 1 ~ Figure 2 As shown, this example proposes
[0039] A vertical shaft with multiple hydrological holes is vertical to the ground, and the depth extends from the surface soil layer 10 to the aquifer 4. The aquifer 2 is located above the aquifer 4. The vertical shaft has multiple hydrological holes for setting in the frozen wall, including
[0040] The first drilling section 1, perpendicular to the ground, reaches the depth of the aquitard 2,
[0041...
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The invention relates to the technical field of vertical shaft freezing construction, and provides a vertical shaft multipurpose hydrological hole and a construction method thereof. The vertical shaftmultipurpose hydrological hole is used for being formed in a freezing wall, the multipurpose hydrological hole is opened in two times, a first drilling section is perpendicular to the ground, and thedepth of the first drilling section reaches an upper water-resisting layer of a water-bearing stratum needing to be reported; and a second drilling section is communicated with the first drilling section and located at the lower side of the first drilling section, the diameter of the second drilling section is smaller than that of the first drilling section, the depth of the second drilling section reaches the water-bearing stratum needing to be reported, a pipe body is arranged in the first drilling section, a gap is reserved between the pipe body and the first drilling section and is annular, and an inner pipe penetrates through the pipe body and the bottom end extends into the second drilling section. A first annular space is formed between the inner pipe and the second drilling section, a second annular space is formed between the inner pipe and the pipe body, the first annular space is communicated with the second annular space, and a pipe fixing layer is arranged in an annular gap between the pipe body and the first drilling section. According to the technical scheme, the problem that in the prior art, the construction progress is influenced by the arrangement position of the vertical shaft hydrological hole is solved.
Description
technical field [0001] The invention relates to the technical field of vertical well freezing construction, in particular to a vertical well with multiple hydrological holes and a construction method thereof. Background technique [0002] In the ground freezing and refrigeration project, the hydrological hole is an observation hole that directly reports the hydrological situation of the aquifer and can directly observe whether the aquifer is circled or not. In the past, when vertical wells were frozen, the hydrological holes were set in the wellbore. If the lower aquifer has not reached the intersecting circle during the excavation of the shaft, the hydrological holes cannot be destroyed. The hydrological hole can only be destroyed after the lower aquifer has been circled, or the excavation can only be carried out after the frozen wall of each layer passed by the wellbore has been circled. [0003] However, as the freezing depth continues to deepen, the stratum structure be...
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IPC IPC(8): E21B43/10E21B33/13
CPCE21B43/10E21B33/13
Inventor 张立刚李锐志郭永富牛鹏翔陈跃文杨岩斌赵永飞郭中华
Owner CHINA COAL FIRST CONSTR