Opening device on the market a wide AISI 4142 Sucker rod variety of species, hole different substrates, sharp teeth the effective cutting is very different, prices vary. At the time of purchase opening, generally we need to consider several factors, and try to find a balance between price and performance, while providing the best cost advantage, quality assurance process and productivity of parts.
(1) consider the number of holes to be machined
A common misconception is: carbide hole saw is always the best choice for the matrix material. High-performance carbide drill drilling can provide the highest rate and the shortest processing cycle. However, if the small number of machined hole, and the workpiece material is thin, low hardness, can be relatively inexpensive bimetal hole may be more cost advantages.
(2) Consider aperture size
Carbide drill bit diameter greater AISI 4145H Hole opener than 12mm expensive, but encountered stiff material, bimetal hole saw is not durable, how to do? Optional carbide hole saw, carbide hole saw, sharp teeth welded alloy made with good abrasion resistance temperature resistance.

During the construction of the system, hole opener drilling buried crossing point and allow the excavation site exploration holes, in order to ensure that no damage to other pipelines.
     2, the selection and preparation of drilling mud
     Drilling mud is an important part of the selection and preparation of horizontal directional crossing, is to drill pilot holes pre-reaming and pullback pipe when the "blood."
     The main effect of 2.1 for cooling drilling mud hole, carry the drill cuttings and discharge the ground,
     Stabilizing the cell walls and reduce torque Hydraulic Drilling jars and pull back when drilling.
     2.2 The performance parameters of density, viscosity and bond strength, control the density prevents hole wall collapse, and the size of the drilling mud viscosity decided takeaway chip capacity, bond strength is a measure of drilling mud solid particles in suspension Ability. Only when these three parameters adjusted to an appropriate range, drilling mud to play the biggest role.

Reaming Construction Technology
(1) Dual Drilling coordinate operations hole opener drilling in and out of the soil point, each with a bench
Machines, one to provide torque, providing a pulling force to avoid long drill
Reamer cause loss of control, reducing the risk of reaming construction of mention
High speed reaming.
(2) high hardness rock reaming the pilot hole after construction is completed in the first
The first was high hard reaming, application engineered hard rock section of 370 m
Reaming process of rock in the rock section with palm-style closely spaced cones reaming
Implement multiple pre-reaming.
(3) The change is completed to drill reaming Rocks, exit the rock expand
Hole device, the reaming drill rock excavated from the point when pulled, on a subsequent drilling
Replace the drill direction lever, CLAY segment reaming.
(4) Multiple reaming reaming construction, mud flowback carry long distance
With sediment, the flow resistance is large, the effect is clear holes or wash hole is not ideal,
The effective size of the hole caused by roller reamer drilling a relative decrease in the underground ring. Using multiple expansion
Hole cutter each cutting down the soil with respect to circulation of cuttings
The mud, the desired reduction in emissions back, so it does not make
Into the hole blockage, the effective size of the annular space has been fully guaranteed.
Concrete construction, in paragraph rock and clay in a total of seven times reaming,
Effectively reduces the resistance of the reamer and shorten the reaming cycle.

Drill pilot holes synchronous dual docking Construction Technology
Using the international advanced double Drill pilot holes sync dock construction
Technology, for the first time successfully implemented unearthed point, buried at both ends Double Diamond
Machine synchronized operation to solve the long hole opener drilling distance through the guide hole in Construction
Drill instability and lack of strength and other problems. Foreign fishing island island through the booklet
Engineering Dual Drill pilot holes sync dock construction technology as follows.
(1) The electromagnetic coil is arranged on the outer island fishing shallow, brochures island side
Rig maintaining low-speed rotation, the use of control to the system will drill to the point unearthed
Drilling approximately 2 200 m, wait and unearthed buried point to point auxiliary rig
Drilling bits for docking.
(2) The special fishing hook mounted on the rig side of the outer fishing island,
Under the guidance of steering systems crossover drilling will salvage hook drilled into the specified location.
(3) foreign fishing island and brochures island keeps rotating rig, fishing hook fishing
After the outer side of the island to catch the drill pipe, drilling rig stopped booklet Island side, the drill bit
Pulling out of the ground. Measuring the deviation is mainly based on two rigs guide
Relative to the measured sensor, the sensor according to the parameters measured, calculated
Azimuth deviation and relative distance between the drill pipe, and gradually adjusted to eliminate bias
Poor, to salvage two drill docking.
(4) designed in accordance with the curve through the external side of the guide hole fishing island
Adjust (i.e. repair hole), thereby completing the construction of the entire guide hole.

After the completion of the pilot hole, hole opener drilling the drill holes should be extended to the appropriate pipe diameter to facilitate the installation finished, a process known as pre-reaming, (depending on the pore size of the final decision reaming times). Typically, the rig across the reamer is connected to the drill pipe, then dragged by the rig rotated back to the guide hole, the guide hole to expand,Platform Drilling Robot  but to a lot of mud pump into the borehole, drilled in order to ensure the integrity and non-landslides, debris and cut back under the ground.

After the pre-reaming is complete, hole opener drilling you can drag the finished drill pipe. Pipe prefabrication should be done on the side opposite the rig. Reaming drill connect the other end to end through the rotary joint on the finished pipe. Finished pipe along the rotary joint to avoid rotating reamer to ensure its smooth drag drilling. Pullback completed by the drilling rig, the process also requires a lot of mud with Platform Drilling Robots dragging back reaming process should be continued until the finished product pipeline and emerged from the side of the rig.

"T tooth" drill is our scientific and technical coil tubing drilling rig personnel to develop new products first domestic. Its features are as follows:
After a drill before using lip surface is flat, use a back order, lip surface is formed concentric teeth (grooved).
2, a conventional concentric concentric tooth tooth bit once polished, then lost the advantage and ordinary flat teeth as concentric drill performance. But "T tooth" wear diamond drill along with the active layer can be gradually deepened tooth concentric grooves, until the work is completed wear layer, and always maintain the advantages of concentric teeth.
3, the drill can be formed concentric teeth, broken rocks ahead, forming a plurality of free surface, both the drill roller reamers drilling grinding and crushing, vibration broken rock, resulting in relatively coarse-grained rock powder, greatly improve the drilling efficiency. According to several experiments situation showed an increase of about 100 percent over the same drill, especially for hard drilling slipping formation.
4, can reduce the radial drill swing, improve drilling stability, oriented to prevent hole inclination, to reduce the impact of the diamond, enhancing penetration ability.

Guide hole is in a horizontal direction at hole opener drilling a predetermined angle and drilling holes in a predetermined cross-section, including a straight slash and some large radius arc. Drill pilot holes at the same time, the contractor may choose and use larger diameter drill (ie irrigation tube) to shield the guide rod. Rinse the catheter tube may play a similar role, can also facilitate retracting the guide rod and replace the drill bit and so on. Direction of the guide hole is controlled by a controller located at the rear end of the drill pipe within the drill bit (called bent housing) is completed. Drilling during the drill is not rotating If you need a change of direction bent housing right position, bore path that is right along a smooth curve forward. Drilling curves by placing the rear end of the drill pipe in the drill of the electronic direction finder is measured and then the results transmitted to the surface of the receiving device, the data is processed and calculated in digital form displayed on the screen, the electron means primarily intended for monitoring the relationship crossover drilling between the drill pipe and the earth's magnetic field and the inclination (bit three-dimensional coordinates in the ground), the measured data are compared with the design data, to determine the deviation of the actual position and the design position of the drill, and the deviation value within an allowable range, and so on until the drill pilot holes in accordance with a predetermined curve unearthed at a predetermined position.

Mainly for geological prospecting in complex formation drill collars manufacturers drilling practical problem. To achieve technological breakthroughs hole expansion pipe, prospector team technical staff after dozens of simulations and field tests, just more than a year we have obtained a lot of new progress, especially in Lujiang - Zongyang National assembled exploration area iron copper water exploration drilling rig encountered swelling, weakness, loose ground test, only half a day to complete the formation of the control section, so that the original drilling process pump pressure drops to normal levels from exceeding 60%. Currently, the project research results, geological core drilling with hydraulic alarm hydraulic tube expander,AISI 4145H Hole Opener  hydraulic alarm tandem drilling reamer and hydraulic anti-de-expander tube into devices, has received three national patents.

(1) According to the test requirements, select the Drilling Stabilizers manufacturers appropriate field, and the rig is securely installed.
(2) large diameter drill bit to a predetermined test depth. Remove the core, will be described.
(3) with polished polished drill hole bottom, hit the bell with a cone drill.
(4) drill bit with a small aperture test hole, big hole coaxial requirements, remove the core described 50cm deep; when the hole wall is not smooth, diamond reamer reaming should be used; when Forging roller reamer the core breaker should be repeated (2) (3) step, until you find the complete core position.
(5) cleaning the test hole, and the hole wall is dried.