The operation of the rotary drilling rig, the basic operation of the rotary drilling rig

1. Lofting positioning.

Before the start of the project, according to the axis and pile layout, a measurement and control network is established in the site, and then the center point of each pile position is measured and released according to the control network.

2. The rotary excavator is in place.

The drilling rig must be stable, circumferential, horizontal, and positioned, and the error between the center of the drill bit and the center of the pile position is not more than 10mm.

3. Bury the casing.

The diameter of the casing should be 200mm larger than the diameter of the pile hole, and the length should meet the requirements that the bottom of the casing enters the clay layer not less, the top of the casing is higher than the ground, the inclination of the casing burial is controlled within 1%, the deviation of the casing is not more than 30mm, and the surrounding of the casing is backfilled with clay, and the layers are tamped.

4. The rotary excavator is made into a hole.

Hole formation with modern tool rotary excavator: After the casing is buried and positioned, the lifting SR-250 rotary excavator is used for drilling, which has high torque, high rotation speed and high hole forming efficiency, which is suitable for drilling in the medium regolith layer.

When the drilling rig is in place, it should be re-measured and positioned, and mud wall protection should be used in the process of hole formation. Utilize the stirring effect of the drill bit to the soil in the drilling process to make natural slurry, the specific gravity of the mud can be adjusted according to the actual needs, the specific gravity of the mud is generally controlled in the construction process, the mud forms a mud skin on the surface of the hole wall in the circulation process, and the self-weight of it and the mud plays a protective role in the hole wall, prevents the hole wall from collapsing.

Through the hole-forming construction, the mud wall protection effect is relatively good, which can fully meet the needs of construction. The rubber brother specific gravity of mud can be adjusted by slag drum slag and the method of adding clean water to the hole, according to the actual construction needs, the specific gravity of mud is controlled above, and this is conducive to the stability of drilling and hole wall.

Hello, how to deal with the drill pipe roller key of the rotary drilling rig 1Check whether the solenoid valve 2 is closed tightly (remove the two oil pipes leading to the solenoid valve 2 for the motor treatment, and block the two oil ports at the motor end with two plugs respectively, and then operate the main winch, if the winch works normally, it means 2.)Check the hydraulic lock, see if the hydraulic lock is faulty, adjust the two lock cylinders first, if it still doesn't work, then remove the lock for careful inspection, and can not find the reason can be used to do the installation test with the ready-made lock 3

Adjust the speed of brake signal oil supply and breaking; At present, the flow rate of the signal oil of the drilling rig can be adjusted, that is, the time when the main winch releases the brake can be adjusted.

Rotary drilling rig is a kind of construction machinery suitable for hole forming operations in building foundation engineering. Mainly suitable for sand, cohesive soil, silty soil and other soil layer construction, in cast-in-place piles, diaphragm walls, foundation reinforcement and other foundation construction has been widely used, the rated power of rotary drilling rig is generally 125 450kw, the power output torque is 120 400kn·m, the diameter of the large hole can reach, the depth of the hole is 60 90m, which can meet the requirements of various large-scale foundation construction.

This kind of drilling rig generally adopts hydraulic crawler telescopic chassis, self-lifting and landing foldable drill mast, telescopic drill pipe, with automatic detection and adjustment of verticality, digital display of hole depth, etc., and the whole machine generally adopts hydraulic pilot control and load sensing, which has the characteristics of light operation and comfort. The main and auxiliary winches can be applied to the needs of various situations on the construction site. This kind of drilling rig with different drilling tools, suitable for dry (short spiral) or wet (rotary bucket) and rock formation (core drilling) hole forming operations, can also be equipped with long auger, underground diaphragm wall grab, vibrating pile hammer, etc., to achieve a variety of functions, mainly used in municipal construction, highway bridges, industrial and civil buildings, underground diaphragm walls, water conservancy, anti-seepage slope protection and other foundation construction.

Domestic experts believe that rotary drilling rigs will still have a large market in the next few years.

The mechanical devices of rotary drilling rigs mainly include luffing mechanism, mast, main and auxiliary winch, power head, follower frame, pressurization device, drill pipe, drilling tools, etc. The parallelogram luffing mechanism and self-raising and lowering folding mast are adopted; Automatic control and detection of host power, rotary positioning and safety protection: automatic detection and adjustment of the verticality of the drill pipe

New technologies such as borehole depth presetting and monitoring. The color display screen intuitively displays the working status parameters, and the pilot control and load sensing are used in the operation of the whole machine, which maximizes the convenience, sensitivity and safety and comfort of the operation, and fully realizes the integration of man, machine, liquid and electricity.

The short auger bit, ordinary drill bit, sand fishing bit, core and other drilling tools supporting the rotary drilling rig can drill into different geologies such as clay layer, gravel layer, pebble layer and moderately weathered mudstone.

Lianda rotary drilling rig.

Rotary drilling rig drilling process and principle. Rotary drilling into a hole is first through the drilling rig's own walking function and mast luffing mechanism to make the drilling tool can quickly reach the pile position, the use of mast guide down the drill pipe to place the bottom of the barrel drill bit with a valve to the hole position, the drilling rig power head device provides torque for the drill pipe, the pressurization device transmits the pressure to the drill pipe and the drill bit through the way of pressurizing the power head, the drill bit rotates to break the rock and soil, and directly loads it into the drill bit, and then the drill bit is lifted out of the hole by the drilling rig lifting device and the telescopic drill pipe to unload the soil, so that the cycle repeats, Continuously take and unload the soil until it is drilled to the design depth. For the rock and soil layer with good cohesion, dry or clear water drilling process can be used.

In loose and easy to collapse strata, static mud wall protection drilling technology must be adopted.

The fundamental difference between the rotary drilling rig drilling process and the forward and reverse circulation drilling process is that the former uses the drill bit to take out the broken rock and soil directly from the hole, while the latter relies on mud circulation to remove the drilling slag from the hole.

The piling of the rotary drilling rig relies on the drill pipe to drive the drill bit and carry out vertical drilling.

According to the shape of the Waidan faction, it can be divided into two categories.

1. Barrel drill bit 1, double bottom drill bit 2, single bottom drill bit 3, rock socket barrel drill 4, cone barrel drill 5, body open drill bit.

2. Auger bit 1, single-head single spiral 2, double-head double-screw town spin 3, double-head double helix can be divided into two categories according to geology.

1. Soil bucket 1, double bottom sand drill bit 2, single bottom drill bit 3, body open drill bit 4, single head soil spiral 5, double-head soil spiral 6, single bottom soil bucket.

Second, the rock mold brigade stone drill bit 1, single-head single helix 2, double-head double helix 3, double-head double helix 4, rock-socketed barrel drill 5, cone barrel drill 6, body open rock drill bit.

Rotary drilling rig school teaching apprentices, how long to learn rotary drilling rig operation teaching.

If you have any operational problems, you need to refer to the specific brand and model. In order to not delay the project, it is recommended that it is best to have a professional operator, after all, the operator is professional enough to control a variety of types of rotary drilling rigs.

There is a demand for rotary drilling rigs.

Go to Infinity.

Large-scale rotary drilling rigs are more difficult, because the operator needs to master the dismantling, loading and transporting of the rod. The operation of small rotary drilling rigs is generally simple, generally 1-3 days can be mastered, like Huilong Machinery can provide free operation training.