Eccentric Overburden Casing Drilling System Superior Performance Long Service Life

Odex Drilling / Simultaneous Casing Drilling

Overburden Casing Drilling System DTH Bit is very popular in international water well and ore drilling field.
Features
Hardening treatment of the part's surface
with longer operating life and excellent anti - wear properties.

Structural optimization
Strengthen the structural strength, easy to operate

Superior performance
Stable and reliable performance, high drilling speed

When the bore-hole is complete, the casing is retrieved to be used again.
Pros
Rapid removal of cuttings;
No use of drilling mud;
High penetration rate, especially in resistant rock formation (e.g. basalt);
Easy soil and groundwater sampling during drilling;
Possible to measure yield estimate at selected depth in the formation;



Application Range:
It is suitable for drilling water wells, geothermal wells, short mircopiles, medium mini-type grouting hole of building, dam and harbour project.
1. When drilling starts, the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down behind the drill bit assembly
2. When the required depth is reached, rotation is reversed carefully, whereupon the reamer swings in, allowing the drill bit assembly to be pulled up through the casing.
3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent.
4. Drilling continues to the desired depth in the bedrock using a conventional drilling.

      Changsha Chaojingang machinery manufacturing Co., Ltd is a modern high-tech enterprise, which is specialized in researching and manufacturing rock drilling machine and pneumatic tools. The company has rich experiences for scientific research and production. It produces prime property and quality rock drilling products by using high-quality raw materials, utilizing advanced production technology and imposing strict quality inspection. The products produced by Super Drill are sold well all over China and exported to over 20 countries, such as Korea, Brazil, Australia, and South Africa etc, high praised by users for its prime property and quality.

      Changsha Chaojingang is located in Liuyang, Changsha, Hunan, which is known as a beautiful fireworks city. It occupies 26600m2, and workshop has 22000m2.With more than 100 staffs, our company includes 26 specialized technicians and 8 senior engineers. And we are equipped with nearly 400 sets of advanced equipment required for manufacturing rock drilling machine and pneumatic tools. We have designed and manufactured the following products: normal circulation DTH hammers and bits, reverse circulation hammers and bits, various kinds of normal and reverse circulation hammers and bits, eccentric drilling equipment, symmetric drilling equipment, casting system, various kinds of threaded bits, shank adapters and coupling sleeves, new-style wells geothermal drilling rig, open-air blasthole drilling rig, all kinds of tool joints and drill pipe and spare parts for drill rig. Our products are widely used in earth-rock work, mining, well drilling, building engineer, geothermal drilling, civil project etc.

      With innovative spirit and development goal to provide solution for rock drilling technique, we always guide ourselves with service concept “focus on users” requirements and meet customers' need with prime quality, advanced technology and full service. Sincerely hope we could achieve win-win to all customers and create a better future.