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Heat-supply heating well overground structure

A technology for heating wells and high-temperature heating, applied in the field of geothermal heating, can solve the problems of low calorific value, affect groundwater, high maintenance costs, etc., and achieve the effect of improving heat capacity and maximizing thermal efficiency

Active Publication Date: 2019-09-06
韩金井 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an aboveground structure for heating and heating wells, which solves the problems in the prior art that the heat value of geothermal heating drilling is inefficient, the maintenance cost is high and the groundwater is affected

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] In the process of drilling and completion, in order to separate different geological formations and prevent the well wall from collapsing due to different formation pressures, one or more layers of casing are required for cementing, and each layer of casing is cemented with cement. The space is filled with annulus protection fluid, and the pressure of the annular space between the casings of each layer is the annular pressure, which is generally called A annulus, B annulus, C annulus, etc., because there may be natural gas or Annulus protection fluid, affected by the temperature during production, expands with heat and contracts with cold, resulting in pressure. Annular pressure control is very important in the development of high-yield and high-pressure natural gas wells. Ultra-high annular pressure may cause casing rupture and natura...

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Abstract

The invention discloses a heat-supply heating well overground structure. The heat-supply heating well overground structure comprises a low-temperature heating well and a high-temperature heating well,neutralization and exchange of cold water and hot water are realized between the parts, on the ground, of the low-temperature heating well and the high-temperature heating well through a ground equipment group, the sections of wellheads, located on the ground, of the low-temperature heating well and the high-temperature heating well sequentially comprise annuluses A, annuluses B and annuluses C from inside to outside, the ground equipment group comprises an annulus-B water pump arranged between the annulus B of the low-temperature heating well and the annulus B of the high-temperature heatingwell, channels between the annuluses B and the annulus-B water pump are annulus-B water pumping channels, and the annulus-B water pump further communicates with a normal-temperature water inlet through an annulus-B pump drainage channel, wherein the normal-temperature water inlet is formed in the annulus C of the low-temperature heating well; and a high-temperature heating well water pump is further arranged at the annulus C of the high-temperature heating well and can pump out heated water circulating to the well bottom to a pore plate. According to the heat-supply heating well overground structure, the problems that in the prior art, the geothermal energy heat-supply and drilling calorific value efficiency is low, the maintenance cost is high, and underground water is affected are solved.

Description

technical field [0001] The invention belongs to the technical field of geothermal heating, and in particular relates to an aboveground structure of a heating well. Background technique [0002] With the improvement of drilling technology and well completion technology, the technology of efficient utilization of underground heat energy has gradually become a reality, optimize the drilling and well completion process, rationally use the drilling and well completion engineering to reasonably design the well pipe string structure, and use horizontal well or vertical well structure Reasonable collocation, using low-temperature and high-temperature heating wells to heat in sequence to maximize thermal efficiency. [0003] One of the existing methods is to use drilling technology to drill the well and then run the casing and then the PVC pipe, inject cold water from the middle of the casing and the PVC pipe, and then pump it into the ground through the bottom hole circulation. It ...

Claims

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Application Information

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IPC IPC(8): E21B43/30E21B34/02F04B51/00F24T10/20F24D3/02
CPCE21B34/02E21B43/30F04B51/00F24D3/02F24D2200/11F24T10/20Y02E10/10
Inventor 韩金井韩松
Owner 韩金井
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