Zila Mountain-super deep horizontal hole drilling

Release time:

2024-10-18

2022 Shangluo Baoyuan Engineering Co., Ltd.

Geological Design

Design top angle:90 °, apex angle deflection range: 100m ≤ 3 °, design hole depth: 1500m, core for whole hole

Overview of final hole

From January 6, 2020 to April 27, 2021, drill to the final hole 1888.88m

Equipment

Full hydraulic horizontal hole core drilling rig

Formation information

 1. Granite, diorite and gabbro are the main rock with high hardness and poor drillability.

 2. Structural conditions: weathered fracture zone is developed near the surface, and there are fault zone and tectonic fracture zone in the deep part.

 3. Hydrogeological conditions: the deep fracture zone may be rich in groundwater and may encounter water gushing in the hole.




Construction characteristics

 1. The drilling rig needs large feed force and rotary power, and the drill string needs to take lubrication and drag reduction measures.

 2. The stable liquid column pressure of the borehole wall cannot be formed in the horizontal drilling hole, and the borehole wall stability of the fracture zone section is poor.

3. During the drilling process, the rock cuttings are highly aggregated in the lower part of the borehole wall, and the drill bit is affected by several factors of rock reaction force on the cutting surface.

Deflection is prone to occur in the middle, and drilling trajectory control is extremely important.

 4. Drill bits, drilling tools and drill pipes are seriously worn, and the wear speed is fast

 5. When the water inflow in the hole is large, it is difficult to push the core tube and the fishing device. It is necessary to provide a mud pump with large pressure and pumping capacity, and take measures to relieve pressure in the well.

 6. When drilling into the broken zone and weak stratum of water gushing, it is easy to collapse and drop blocks, causing sticking and burying accidents.

 7. After φ 98 drilling tool is drilled to 290m, the drilling hole starts to drift up. When it reaches 390m, the drilling hole has drifted up 4 degrees cumulatively, and when it reaches 457m, it drifts up to the highest point of 96.26

 8, drilling water caused by mud lubrication drag reduction greatly reduced, drill pipe, drilling tool wear accelerated, rotation resistance increased

9. When drilling 1100~1200m, the formation is hard, with an average of 3~5m per day, and the effective life of the drill bit is 6~10m;1300~1600m, the rock hardness level is higher,

Average daily2~3m, the effective life of the drill bit is 2~6m

  Drilling process scheme

Drilling tool configuration

Process technology point

open

Opening:Φ146 drilling tool single pipe drilling

Φ146 core tube Φ150 single tube diamond bit

1, increase the diameter of the drill bit, increase the outer ring space gap, reduce

Less drilling resistance

2. Adopt small diameter guide hole, large diameter reaming, circulation

Drilling process

3. Increase the annular gap, large pump capacity and large pressure push

Drilling tool

4, take to increase the mud viscosity and lubrication performance, drill pipe

The outer wall is coated with high-efficiency grease. Compound lubrication and drag reduction measures

5, using the same inner hole with joint H, N□ diameter rope

Drill pipe to ensure the rigidity and strength of the drill string

Orifice tube: depth approx.97.07m

φ146 sleeve boot

Second opening

Drilling: AdoptingJS122 drill pipe φ122 drill

tools, lowerφ114 casing

JS122 core drill JS122 diamond bit

Technical casing: depth approx.126m

φ114 casing

Three open

Drilling: AdoptingJS98B drill pipe φ98 drilling tool

Combined Drilling, Lowerφ95 casing

JS98 Core Drill JS98 Diamond Bit

Technical casing: depth approx.991.51m

φ95 casing

Four open

Drilling: AdoptingJS75B drill pipe φ80 drilling tool

Combination drilling to final hole1888.88m

φ80 core drill φ80 diamond bit

 

Previous Page

Shandong Wendeng-4000m Scientific Drilling Hole

Development and Application Demonstration of 5000m Intelligent Geological Drilling Technology and Equipment

Next Page

Related Information

If you are interested in our products, please contact us!

JINSHI DRILLTECH products in Europe, Asia, Africa, Latin America, Antarctica full coverage. We have friends all over the world.

Contact Us>>

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

COOKIES

Our website uses cookies and similar technologies to personalize the advertising shown to you and to help you get the best experience on our website. For more information, see our Privacy & Cookie Policy

These cookies are necessary for basic functions such as payment. Standard cookies cannot be turned off and do not store any of your information.

These cookies collect information, such as how many people are using our site or which pages are popular, to help us improve the customer experience. Turning these cookies off will mean we can't collect information to improve your experience.

These cookies enable the website to provide enhanced functionality and personalization. They may be set by us or by third-party providers whose services we have added to our pages. If you do not allow these cookies, some or all of these services may not function properly.

These cookies help us understand what you are interested in so that we can show you relevant advertising on other websites. Turning these cookies off will mean we are unable to show you any personalized advertising.

Address: Hancheng, lubei district, Tangshan City, Hebei Province E-mail:tsjinshicy@163.com | Powered by www.300.cn | SEO | Business License | Privacy Policy