Trenchless brings over 2 decades of “HANDS ON” construction experience in developing the “Right” tooling for HDD applications
We provide all HDD tooling developed In-house
- (a.) HDD Pipe Roller, 12” to 48”
- (b.) Rock Reamers (Split Bit), 12” to 64”
- (c.) Barrel Reamers, 12” to 64”
- (d.) Fly Cutters, 12” to 64”
Rig / Pump Spares
- (a.) Drill Bits, 4 ½ ” to 17 ½ ”
- (b.) Drill Pipe, 2 7/8 ” to 6 5/8”
- (c.) Sonde Housing
- (d.) Mud Motors (Russian), 3 ½ ” to 8”
- (a.) Hydraulics/ Pumps/ Gear box, Various Makes
- (b.) Mud Pump Consumables, Various Makes
The Laser Guided Tunnel Boring Machine is composed of a Bore Head equipped with a Hydraulic operated cutter in the front. The pipe pusher consisting of hydraulic jacks is used to push the casing installed right behind the Bore Head. The cuttings from the bore head is evacuated from the casing by using the conveyor or Augers installed in smaller casing pipe. Bentonite is also injected in the annulus between the casing and the adjacent pipe to reduce friction while pushing longer drives. After completion of the crossing cement grout can be injected throughout the bore to avoid any settlement.
The bore alignment is continually checked using a laser incorporated into the tunnel bore and steerable hydraulic cylinders makes it possible to make adjustments during the boring process. Moreover, a shield can be installed in the upper part of the tunnel bore, which makes it possible to avoid any excess excavation that might produce subsidence.
TESPL has installed Large Diameter pipes for Water and Sewer Boards as well as for Oil and Gas Pipelines up to a dia of 68” Casing Pipe and lengths up to 100 meters in single shot.
We own a fleet of 7 different Diameter of Bore Heads i.e. 42”, 48”, 54”, 60”, 68”, 72” and 80”.
In Box Pushing, A RCC box culvert is sequentially pushed from one side of embankment towards the other side, slowly. The Box, which is passing below the existing road is cast in situ in form of small segments. It is then placed in the alignment of the crossing, perpendicular to the traffic above and slowly pushed with help of Hydraulic Cylinders. Extreme precautions are taken to prevent cave in and causing damage to live loads above the Box. The Construction of Passenger / Vehicle under Pass, below live traffic is challenging to say the least.
An Auger Boring Machine is used to bore horizontally through soil or rock with a cutting head and auger. The majority of Auger Boring are used to install pipe casing under railroads, highway, airport runways, creeks or any area of the surface ground that cannot be open cut or disturbed in anyway.
An Auger Boring Machine is used to bore horizontally through Soil or Rock with a cutting head and auger. The majority of Auger Boring are used to install pipe casing under railroads, highways, airport runways, lined drains etc. The ABM is usually used in places where sub-soil water is not present. TESPL has installed many cased crossing for both Oil & Gas sector and for Water Boards.
We have been providing HDD Technical Consultancy to many Clients/ Consultants/ Contractors in India, Egypt, Iraq, Bangladesh, UAE, Nigeria & Israel.
We provide consultancy in the following:
- Job Planning
- Selection of Equipment
- Selection of Tooling(For rock as well as for soft crossings).
- Complete Drawing, Design and Engineering.
- We also provide skilled manpower for executingany type of HDD Work in World.
We at Trenchless Engineering Services (P) Ltd have been involved in Horizontal Directional Drilled (HDD) industry in India since 1991. We have the experience and equipment to carry the most rugged crossings.
We have a strong international presence, we have successfully completed H.D.D. projects in various countries of Asia and Pacific. Projects have been completed for Many National and International Companies such as, Gas Authority of India Limited (GAIL), Gujarat State Petronet Limited (GSPL), Indian Oil Corporation Limited (IOCL), Oil & Natural Gas Corp Ltd, Oil India Ltd, Petro-bangla, Gas Transmission Corporation Ltd, Bangladesh, Delhi Transco Ltd, ILFS India, Lanco India, Mears USA, Enikkom Nigeria, Zakhem Nigeria, NNPC Nigeria etc.
In all, the principals and employees of TRENCHLESS ENGINEERING (P) LTD have executed in over 200 river crossings just of Oil and Gas sector. Trenchless Engineering can perform contracts on a “Turn-key” basis including Linepipe supply, welding, NDT, installation, Hydro testing and Commissioning.
Information Required to Make Price Proposal
Comprehensive information about the proposed HDD Project will enable us to make a precise commercial proposal. Listed below is the suggested type of information needed. Since HDD projects can involve going under features like highways, Rivers, Canals, Utilities etc. appropriate changes to the information may be made.
Information for River or Water Crossings
- Diameter of the product pipe(s), wall thickness, material and grade.
- Cross section and Plan view of the river to be crossed, showing
- River Bed Profile
- High Banks and Low Water levels
- Pipeline Route Survey Drawing, showing
- Ground elevations on both sides of the river for a distance about as long as the proposed crossing length.
- Soil investigation report.
- Hydrological Data
- It includes bore-hole data up to depths of at least 5 meters below the level of pipe installation showing the
- Strata Encountered
- Standard Penetration Test Curve (N Values)
- Grain Size Analysis
- Compressive Strength
- Other relevant information regarding project, construction period etc.