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   H.H. Drill-Tech Drilling Machinery Co., Ltd. , the former Jiangsu Lianyungang Huanghai Machinery Co. Ltd., is a National Hi-tech Enterprise, specializing in design, and manufacture a variety of complete drilling equipment and drilling tools including geological exploration, coalbed methane exploration, engineering piling foundation drilling and trenchless drilling in China.
  Among our products, one of them is awarded a National Silver Medal, three of them are awarded as National Innovated Product, four of them are in the leading position in China and five of them are High and New Tech Product in Jiangsu Province.
  The company is located in Lianyungang Haizhou Development Area with registered capital RMB340,000,000.00 and covers an area of 191,800 square meters, with a workshop floor area of 104,000 square meters. There are six hundred employees, more than one hundred technical persons. It owns more than 450 sets of production and testing equipment/instrument. The company makes five main series consisting of more than 60 varieties of products.

Our main products consist of core drill rigs, multi-function full-hydraulic top driving rigs, engineering drill rigs, and trenchless horizontal directional drill rigs etc. All these make totally 4 series of products, including more than 80 varieties of models and types, and also drilling derricks, drilling tools and mud pumps etc. and more than 70 relevant other auxiliary equipment.
Main Geological Survey Equipment Product
  1. Spindle type core drilling rig (annual output 2000 Pcs)
  2. Full hydraulic core drilling rig(annual output 200 Pcs)
  3. Full Hydraulic Underground Drilling Rig 
  4. Coalbed Methane Drilling Rig (annual output 10 Pcs)
  5. Engineering Exploration Drilling Rig(annual output 10 Pcs) 
  6. Drilling Derricks and Drilling Tower 
  7. Drilling Rod (annual output 2000m)
  8. Horizontal Directional Drilling Rig
Our products are well sold all over China and exported to more than 40 countries and regions of the world. Those include the developed countries like America, Canada, Russia, the South America countries such as Chile, Colombia, Argentina and Peru, etc. the African countries, e.g. South Africa, Kenya, Mozambique, etc. as well as the Southeast Asian countries.
  1. The multi-function series drill rigs, with full-hydraulic top driving drill head, can be applied in shale gas, coalbed methane drilling, superficial petroleum and natural gas exploration, geothermal and water well construction and construction of engineering hole in mines.
  2. The engineering drill rigs are suitable for large-diameter hole drilling in the constructions of bridge, highway, high-rise building, pile foundation and anti-well drilling, which can be carried out in the quaternary period gravel or hard rock stratum and ground with largest diameter of drilling hole up to 3meters.
  3. The horizontal directional drilling series rigs have the pull capacity from150kN up to 12000kN (the largest in the world), which be applied in laying power cable, telecommunication cable, thermodynamic pipeline, gas pipeline and water supplying and drainage pipes, and other gravity pipes which have to cross river bed, highway, bridge, building and other constructions.
  4. The traditional spindle series and full hydraulic crawlers core drill rigs, with the drilling capacity to the depth from 100 to 4,200 meters (328 to 13,776 feet), can be applied in solid mine bed exploration drilling, engineering geological and underground water exploration, mine gallery ventilation and water discharge tunnel drilling. These application can be further described as:
  (1) HXY series as well as their improved products, HYDX series and HCR series drill rig, which are used in geological exploration drilling with the drilling depth from 100 meters to 4200 meters;
  (2) MD series crawlers type and HMC series truck-mounted type coal bed methane drill rig, used in shadow layer oil and gas drilling, oil well repair and ultra deep core drilling;
  (3) GQ series engineering drill rig, which are suitable for foundation pile drilling in bridge, road and building with the drilling hole dia. from 0.8 meter to 3 meters;
  (4) FDP series horizontal directional drill rig, used for underground pipe construction (including power cable, telecommunication cable, heat pipeline, gas pipe and water supply & drainage pipe) with trenchless technology, the pulling force is from 150 KN till 7500 KN.
We are glad to receive and collect all the advises so as to improve our future work. We always produce our products in advance on the basis of analyzing the market demand home and abroad in order to promote our geological survey equipment effectively and increase our market share. Our sale staff must fully understand our clients' requirement and in return introduce the very right product to our clients.
1. Pre-sale Service
  (1) For each product, the related product information and technical data will be provided for our clients to ensue the suitable product. 
  (2) According to our trade contract, we will send our geological survey equipment products on time.
  (3)All the equipment must be strictly checked and tested repeatedly to meet our client demands.
  (4) It is acceptable for our product to be checked by the third party. All the geological drilling rig products will be improved upon our client's demand. 
2. Service within Sale
  (1) We will pay a very close attention to the status quo of our client's use. We usually keep in touch with our clients and revisit them at irregular intervals.
  (2) We always maintain our products in stock for our clients' sake.
  (3) our delivery circle is not that long, about 10 or 15 days. When the products need improving according to our client's need, the delivery circle will be much longer, 1 or 2 months.
3.After-sale Service
  (1) Our client with on-site service and training program is provided for one or two weeks.
  (2) Substitute for the normal wear parts for free within the guarantee period. (The guarantee period of spindle core drilling rig is 6 months; the full hydraulic core drilling rig is 12 months).
  (3) If necessary, we can send the substitute of those geological drilling rigs by DHL, etc. In cases where the wear parts are out of production for the sake of upgrade, we will reproduce the parts particularly for our clients.
  (4) As for the damage beyond our responsibility, we can, in response to our clients, provide technical guidance to repair or change for a new one.