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INTERVENTION COMBINATIONS TO BOOST WELL PERFORMANCE IN GEOTHERMAL SYSTEMS

Resumen de: US20260028968A1

Methods are provided for extracting thermal energy from a geothermal reservoir having at least one feature extending therethrough, which involve drilling or accessing a production well that intersects the at least one feature, wherein the at least one feature provides a flow path of pressurized geothermal fluid into the production well. Well log data can be analyzed to determine position of the at least one feature in the production well. One or more interventions, or combinations of interventions, can be performed to open the feature or otherwise enhance the flow rate of pressurized geothermal fluid carried by the feature into the production well. The intervention(s) can be performed on multiple features that connect to the production well. The method can also be applied to multiple production wells.

GROUNDWATER HEAT EXCHANGER HAVING A CABLE CHANNEL

Resumen de: US20260029165A1

A groundwater heat exchanger includes a plurality of heat exchange pipes, a housing and a cable channel. Each of the heat exchange pipes is configured to receive a loop fluid flow. The housing has an interior chamber that contains the heat exchange pipes and defines a groundwater passageway that is configured to receive a groundwater flow. The cable channel is formed on an exterior of the housing and extends along a central axis of the housing. The cable channel includes at least one cable pathway configured to receive one or more cables.

PACKER AND UNSEALING METHOD THEREOF

Resumen de: US20260028891A1

The present invention proposes a packer, comprising a central tube (1), an outer surface of which is provided with a first prefabricated groove (11); a rubber cylinder unit (2), comprising a rubber cylinder assembly (21), an upper rubber cylinder seat (22) and a lower rubber cylinder seat (23), a slot (221) being formed in an inner wall surface of the upper rubber cylinder seat; an upper anchoring unit (3) and a lower anchoring unit (4) arranged at both ends of the rubber cylinder unit, respectively, the upper anchoring unit comprising an upper cone (31) and an upper slip (32), and the lower anchoring unit comprising a lower cone (41) and a lower slip (42); and an unsetting mechanism (5), comprising a connecting sleeve (51), wherein through grooves (511) are arranged on the connecting sleeve, and one unsetting block (52) is arranged in each through groove.

HIGH THERMAL COEFFICIENT GROUT COMPOSITIONS AND METHODS THEREFOR

Resumen de: US20260028271A1

A high-thermal conductivity grout composition is provided. The composition includes a grout mixture including a cementitious material, a retarder, and a high-thermal k material that advantageously can form a pumpable slurry upon admixture with water. The retarder is present in an amount effective that delays setting of the grout mixture at a target location having a geostatic target temperature of at least 300° F. for at least two hours. The high-thermal k material is present in an amount effective such that the grout mixture has, upon setting at the target location, a thermal conductivity of at least 1 W/m° K.

Geothermal heat transfer system

Resumen de: GB2700388A

A geothermal heat extraction system comprising: a heat transfer column F placed within a borehole, the column formed of a plurality of preformed cartridges containing a heat dissipating material, the cartridges connected by a heat transfer sub containing a heat transfer plug; and a heat exchanger X connected to the surface end of the column. The heat dissipating column may be graphite or aluminium oxide and may be in a solid or a granular form. The column may be surrounded by casing S comprising a graphene pipe or graphe foil wrap encased in a steel or composite tubing. Figure 2

GROUNDWATER HEAT EXCHANGER HAVING A CABLE CHANNEL

Resumen de: EP4685413A1

A groundwater heat exchanger includes a plurality of heat exchange pipes, a housing and a cable channel. Each of the heat exchange pipes is configured to receive a loop fluid flow. The housing has an interior chamber that contains the heat exchange pipes and defines a groundwater passageway that is configured to receive a groundwater flow. The cable channel is formed on an exterior of the housing and extends along a central axis of the housing. The cable channel includes at least one cable pathway configured to receive one or more cables.

DEVICE FOR EXCHANGING GEOTHERMAL ENERGY WITH AN AQUIFER WHICH IS NEAR THE SURFACE, AND THERMAL POWER STATION COMPRISING AT LEAST ONE SUCH DEVICE

Resumen de: WO2024194342A1

The invention relates to a device for exchanging geothermal energy with an aquifer which is near the surface for an operation in a thermal power station using an exploitation well (1) for conveying groundwater out of the aquifer (3) through at least one exploitation line (7) and using an injection well (4) for injecting the conveyed groundwater into the aquifer (3) through at least one injection line (9), wherein the at least one exploitation line (7) and the at least one injection line (9) are connected together via a primary line (17) in order to transfer water. The invention is characterized in that the exploitation well (1) has at least one horizontal exploitation section (6) at the aquifer-side end (12) thereof, the at least one exploitation section (6) is operatively connected to at least one exploitation line (7) in order to convey water out of the aquifer (3), and a filter tube (2) is arranged within the at least one exploitation section (6).

中低温深度取热的吸收式冷热双工况级联系统及其运行方法

Resumen de: CN121408874A

本发明涉及一种中低温深度取热的吸收式冷热双工况级联系统及其运行方法，包括地热一次侧取热单元、双热泵级联单元、用户端及冷却塔，地热一次侧取热单元与双热泵级联单元形成“串联取热降温+串联升温提位+多源并联混合”的协同模式，能够同时获得60‑80℃供暖热水与7℃冷冻水，提供供热、制冷双工况运行。本发明以第二类吸收式热泵将地热中温直接作为驱动热源，无需电压缩机；再与第一类吸收式热泵级联，使井口出水进一步放热，将回灌温度压低至约20℃再进行回灌，实现“多用热”；同时提供用户所需的供热/冷冻输出；通过阀门与循环泵的联动，仅以小功率泵耗即可完成工况切换与能量分配，达到少耗电、深度取热的目标。

一种用于页岩油联合站增强型中深层地热储取协同系统

Resumen de: CN121408740A

本申请公开了一种用于页岩油联合站增强型中深层地热储取协同系统,属于地热开采及应用技术领域。包括中深层地热井、太阳能集热场、除砂器、储热罐、第一缓冲罐、第二缓冲罐、蒸发器、压缩机、膨胀阀、冷凝器、第一循环水泵、第二循环水泵、第三循环水泵、多模态智能调控系统及若干智能电动调节阀。本申请通过太阳能集热场与中深层地热井的协同运行，实现了“夏灌冬用”的跨季节储热与高效取热。

一种预制能源桩

Resumen de: CN121407555A

本发明公开了一种预制能源桩，涉及预制桩技术领域，包括上桩体和下桩体，所述上桩体和下桩体内固定连接有介质管道。本发明通过安装有上连接件、中间连接件、下连接件，实现桩体与桩内介质管道的快速对接，解决多段桩体内介质管道对接困难的问题，实现工厂预制与现场装配的协同，提高施工效率。

地热对井采灌系统开采井热突破临界时间理论计算方法及系统

Resumen de: CN121413501A

本发明涉及地热对井采灌系统开采井热突破临界时间理论计算方法及系统，属于地热能技术领域，包括：基于能量守恒原理，以现有的热突破临界时间计算方法为基础，根据回灌冷水进入热储层后冷热水间的热交换，推导热突破临界时间理论计算模型；确定预设参数；将所述预设参数输入所述热突破临界时间理论计算模型，计算不同采灌量和采灌井间距条件下开采井的热突破时间。本发明推导出的考虑热储层内冷热水间热交换的热突破临界时间理论计算公式计算结果是已有计算公式计算结果的三分之一，具有更大的安全冗余度。

一种多结构耦合的土壤长周期储热装置

Resumen de: CN121409025A

本发明公开了一种多结构耦合的土壤长周期储热装置，属于可再生能源储能技术领域。该装置包括圆柱状土壤储热体、短期蓄热水箱以及高温分集水系统和低温分集水系统。土壤储热体在径向上划分为中心区、中间环区和外周区，中心区和中间环区布置U型管结构的浅层储热井，外周区布置同轴套管结构的中深层储热井，并形成内密外疏的布局。高温分集水系统将高温工质优先导入中心区及外周区储热井，低温分集水系统将低温工质导入中间环区储热井，从而在地下主动构建“高‑低‑高”的温度场梯度。这种结构利用外围低温区形成热屏蔽效应，并结合顶面保温板，有效抑制了径向和向上的热损失，显著提高了跨季节储热效率。

一种基于地热井的换热系统

Resumen de: CN121408860A

本发明公开了一种基于地热井的换热系统，涉及地热设备技术领域。包括地下换热系统，所述地下换热系统包括U型换热管和螺旋导热件，所述U型换热管设置于地底，并且所述螺旋导热件套设于所述U型换热管上，所述U型换热管上设置有循环泵；地上换热系统，所述地上换热系统包括热交换组件、上介质管道和压力控制组件，所述上介质管道的两端分别与所述U型换热管的两端相连接，所述压力控制组件与所述上介质管道相连接，所述热交换组件与所述上介质管道相连接；PLC，所述PLC分别与所述地下换热系统和所述地上换热系统相连接。本发明可对U型换热管进行预热，避免寒冷状态下突然高温对U型换热管的刺激，可提高U型换热管的使用寿命。

基于地质分层的深浅耦合地源热泵系统优化设计方法

Resumen de: CN121413338A

本发明涉及地热能利用技术领域，公开了基于地质分层的深浅耦合地源热泵系统优化设计方法，方法包括以下步骤：S1，获取目标场地的地质分层信息，以及各分层的热物性参数、水力参数和力学参数；S2，针对深部换热器基元和浅部换热器基元；S3，引入运行权向量，用于定义全生命周期内深、浅部换热系统承担建筑负荷的动态分配比例；S4，建立以全生命周期总成本最小化为目标函数的优化模型；S5，采用优化策略求解所述优化模型，获得最优解；S6，根据所述最优解，输出一体化优化设计方案。通过将物理布局设计与动态运行策略进行一体化协同优化，全面考虑了地层热－水－力耦合效应，实现全生命周期成本的最小化。

地热能换热系统及其布井压裂制备方法

Nº publicación: CN121407914A 27/01/2026

Solicitante:

中国石油化工股份有限公司中石化石油工程技术研究院有限公司

Resumen de: CN121407914A

本发明涉及一种地热能换热系统及其布井压裂制备方法，地热能换热系统，包括分别布置于岩石的注入水平井、采出水平井及直井，所述注入水平井具有相对的注入竖直段和注入水平段，所述采出水平井具有相对的采出竖直段和采出水平段，所述注入水平段在所述采出水平段下方，所述注入水平段通过若干第一压裂裂缝连通所述采出水平段，所述直井的底部比所述采出水平段深，所述直井的底部通过若干第二压裂裂缝连通所述采出水平段。上述地热能换热系统，形成联合注采井，获得足够大的裂缝表面积来确保压裂裂缝与注入流体的热交换能迅速有效实现，能够提高换热效率，还能够提高采出井温度和流量，这对于深层地热资源的开发利用将发挥重要的技术支撑作用。