Shandong Wendeng-4000m Scientific Drilling Hole

Release time:

2024-10-18

 

 

The First Geological Team of Shandong in 2022

Geological Design

 1. Project Name: Survey of Deep Geothermal Resources in Wendeng-Rongcheng-Weihai Area of Shandong Province, Hole No.: LGZK1

 2. The design depth is 3000m, the final hole diameter is less than 95mm, and the whole hole is continuously core

Overview of final hole

 1. Opening date: November 6, 2018, end hole date: November 12, 2019, end hole depth: 3003.17m

 2. Subsequent extended drilling, the final hole date is May 9, 2022, and the final hole depth is 4023.70m

Equipment

 Vertical shaft drilling rig

Formation information

 Mainly granite, with medium hardness and good drillability

 Drilling process scheme

Drilling tool configuration

Process technology point

open

Opening: φ216 single tube core to 30m

φ216 diamond bit

1. As the borehole deepens, the ground stress increases,

Irregular core is easy to fall off, preventing core falling off

Residual, long stroke, barbed circlip

2. CS98 rigid drill string, strong conduction torque,

With the function of righting and preventing drilling deviation

Orifice pipe: depth about 30m

φ178 sleeve boot

Second opening

Drilling: XJS122 rope drilling 1500m

XJS122 drill pipe JS122 drilling tool

Technical casing: about 1500m in depth

φ114 casing boot

Three open

Drilling: φ98 diamond rope drilling

To 3700 m

CHD98 drill pipe CHD98 drilling tool

Drilling: φ98 diamond rope drilling

4023.70 m to final hole

CS98 rigid drill pipe CHD98 drilling tool

 

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