Deep hole geological core drilling tools meet the drilling requirements of 3000 meters and above. The main diameters are N, H and P, which are selected according to the final hole diameter requirements.

Brief Introduction of Special Pipe for 1. Deep Hole Rope Drill Pipe

The steel grade of geological pipe commonly used in Jinshi deep hole rope drill pipe is ZT850. At present, our company's deep-hole rope drill pipe raw material suppliers include Shanghai Baosteel, Zhejiang Jiaxing New Era, Wuxi Beilai. The raw materials provided by these three enterprises are all geological pipes with the highest quality, the most stable performance and the highest dimensional accuracy in the domestic geological prospecting industry.

Mechanical performance of 2. deep hole rope drill pipe

3. deep hole geological core drilling tool manufacturing process

1. The deep hole rope drill pipe is in the form of joint, and the manufacturing process is as follows:

2. The manufacturing process of rope double-pipe drilling tools is as follows:

3. The manufacturing process of diamond drill bit is as follows:

Technical requirements for manufacture of 4. deep hole rope drill pipe

1. Inward inspection of raw materials: tensile strength, yield strength, elongation, hardness and metallographic examination, etc.

2. Blanking: Ensure length tolerance

3. Straightness inspection (≤ 1:3000) and coaxiality inspection (≤ 0.3mm)

4. Inspection of thickened end parts: tensile strength, yield strength, elongation and metallographic examination, etc.

5, heat treatment inspection: tensile strength, yield strength, elongation, hardness and metallographic, etc.

6. Thread processing (CNC lathe forming tool to ensure thread interchange and tightness)

7. Special thread gauge inspection (ensure tight distance of 2.5±0.2mm)

8. Thread surface treatment (increase thread self-lubrication)

9. Inspection of thread tensile strength

10. Anti-rust treatment of drill pipe surface

11. Finished product inspection: thread and appearance inspection

12, packaging storage, thread using plastic

Plugging or iron sheet protection, drill pipe mining

Packed in square bundles for easy loading and unloading.

Features and advantages of 5. deep hole rope drill pipe

1. The two ends of the drill pipe body shall be thickened and tempered to enhance the wear resistance of the two ends of the pipe body. The two ends of the drill pipe body have large thickness and high hardness relative to the middle section, which has the function of shock absorption and buffering and reduces the load in the use of thread drilling.

2. Straightness of drill pipe ≤ 1:3000 and concentricity ≤ 0.3mm to ensure smooth drilling of drill pipe string during drilling.

3. The length of the deep hole drill pipe is 4500mm, which ensures the standard length of the stand and the number of thread heads connected with the drill pipe string is small, thus improving the safety of the drill pipe string.

4, drill pipe processing using numerical control machine tool forming tool thread gauge inspection, thread processing using imported special forming knife, high precision, surface finish of more than 1.6μm, control thread tight distance of 2.5±0.2mm, to ensure that the thread seal pressure is not less than 12Mpa.

5, drill pipe thread surface treatment, improve wear resistance, increase self-lubricating, effectively prevent thread galling, to avoid the risk of other thread surface hardening process instability

6. The comprehensive service life of drill pipe is more than 10000 meters.

6. gold and stone deep hole rope series drill pipe technical parameters unit:(mm)

Successful case of 7. deep hole construction

1. Well 2 of Continental Deep Scientific Drilling Project in Songliao Basin (Songke Well 2)

Institute of Exploration Technology, China Geological Survey

Construction period: 2014.4 -2018.5Final hole depth: 7018m      Final hole diameter: φ152mm

Drilling tool standard: KT140(φ311, φ216, φ152 drill bits)

Main achievements: all scientific achievements of Songke No.2 well, which exceeded the predetermined target, have reached the international advanced level, setting four world records for deep drilling technology and achieving two major breakthroughs. It has set four world records for the longest continuous coring of 311mm large diameter and the longest single coring of three different diameters. For the first time in the world, large-diameter one-time coring technology has been developed and successfully applied. Successfully developed anti-high temperature drilling technology, create a new record for drilling under the conditions of the highest temperature (241 ℃) in China.

2. Shale gas exploration parameter well LCO1 in Lin'an City, Zhejiang Province

Construction unit: 313 Geological Team of Anhui Bureau of Geology and Mineral Exploration

Construction period: 2015.4-2016.2Final hole depth: 2328.18m    Final hole diameter: φ152mm    Drill pipe standard: CHD127(PCDR)

Difficulties and achievements:(1) The accidents such as bending and breaking of the drill pipe and collapse of the hole wall due to the large annular space between the drill pipe and the hole wall are well solved and prevented;

(2) The technical problems such as drilling efficiency, bit life and bit bottom cooling under the condition of large diameter and low speed are well explored.

Anhui 313 Team Performance Proof, Technical Paper

3. CSDP-2 Well of Continental Shelf Scientific Drilling Project in East China Sea

Construction unit: No.3 Geological Brigade of Shandong Provincial Bureau of Geology and Mineral Exploration and Development

Construction period: 2013.7-2015.8. Final hole depth: 2843.18mFinal hole diameter: φ98mm drill pipe standard: CHD98

Main achievements: CSDP-2 well is the first well drilled by full core drilling in the central uplift of the South Yellow Sea, which is of great significance for establishing the standard sequence stratigraphic framework of the Middle-Paleozoic boundary of the South Yellow Sea, restoring the sedimentary and tectonic environment of the South Yellow Sea, and revealing the oil and gas geological engineering of the South Yellow Sea.

4. Gold Survey Project in Wuyi Village, Laizhou City, Shandong Province

Construction unit: No.3 Geological Brigade of Shandong Provincial Bureau of Geology and Mineral Exploration and Development

Construction period: 2016.4-2017.8Final hole depth: 3266.06m     Final hole diameter: φ98mm     Drill pipe standard: CHD98

Main Results: The smooth completion of the drilling is another major breakthrough in deep prospecting in the area, with proven new reserves of more than 2460 tons, exceeding the total accumulated identified resource reserves in Jiaodong in the 61 years since the founding of the People's Republic of China, accounting for 40% of the national review and filing reserves. Laizhou-Zhaoyuan Gold Mine Integrated Exploration Area has become the third largest gold mining area in the world.

5. Well Drumi 1, Roadway Geological Drilling Project, Lower Yangzi Area, Anhui Province

Construction unit: No.7 Geological and Mineral Exploration Institute of Shandong Province

Construction period: 2017.12-2018.7. Final hole depth: 2751.88mFinal hole diameter: φ77mm      Drill pipe standard: XJS75C

6. Shale gas exploration project in Fusong County, Baishan, Jilin Province

Construction unit: No.6 Geological Prospecting Engineering Brigade of Jilin Province

Construction period: 2017.10 --- 2018.5Final hole depth: 2726m     Final hole diameter: φ77mm     Drill pipe standard: CHD76

8. Goldstone Drilling

Jinshi has three standardized test demonstration machines to help new products and new processes, innovate modern drilling construction concepts, and achieve good results in drilling and construction in complex formations.

Jinshi Drilltech Co., Ltd. The Drilling Engineering Department was established in January 2004 and has Class C qualification for drilling construction. The company has 6 sets of various drilling equipment, including 1 XY-8 drilling rig for large equipment, 2 XY-6B drilling rigs, 1 XY-5 drilling rig, 1 XY-44 drilling rig and 1 portable drilling rig. Our company's equipment and materials are fully equipped, and the technical force of personnel is strong. In recent years, it has undertaken a number of geological and mineral exploration, oil and gas wells, water conservancy and hydropower exploration and drilling construction projects, and achieved excellent results.

Business scope: oil and gas wells, coalbed methane wells, shale gas wells, railway survey, geological and mineral core drilling construction, hydrological hole construction, hydropower survey hole drilling construction.

Major drilling performance in recent five years:

At present, great changes have taken place in the domestic geological prospecting market. In order to adapt to the market changes, Jinshi has continuously studied new technologies, developed new products, actively participated in the research of green resources and scientific drilling projects, and made bold attempts in the exploration of green energy such as oil shale, geothermal, dry hot rock, ocean, combustible ice and other green energy, and achieved remarkable results. It has repeatedly set new records for large-diameter and ultra-deep hole drilling, won the second prize of National Science and Technology Progress Award and the Ministry of Land and Resources Science and Technology Progress Award once, many provincial and municipal awards, in the same industry has also been praised by many experts and customers.