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Methods of Hydrological Logging 2

May 18 , 2022

Hydrological logging is an important part of groundwater exploration. Through logging, we can further understand the properties and conditions of aquifers, obtain the location and thickness of underground aquifers, accurately divide the interface between salt and fresh water, and obtain the water content of each aquifer. The results are not only of great significance for guiding the well formation, but also an important reference for groundwater resource evaluation.

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Classification of Mud Pumps

May 18 , 2022

There are many types of mud pumps, and the classification methods are also different. Generally speaking, there are the following types: (1) According to the number of cylinders, it is divided into double-cylinder pumps, triple-cylinder pumps, etc. (2) According to the number of times a piston inhales or discharges liquid once in the liquid cylinder, the one that suctions or discharges liquid once is called a single-acting pump, and the one that suctions or discharges liquid twice is called a double-acting pump. (3) According to the arrangement and mutual position of the liquid cylinders, there are horizontal pumps, vertical pumps, V-shaped pumps and star pumps. (4) According to the piston style, it is divided into piston pump, plunger pump, etc. Since the liquid transported by the mud pump is usually drilling fluid, it is customarily called the mud pump as the drilling pump.

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Methods of Hydrological Logging

May 12 , 2022

Hydrological logging is that after the drilling machine completes the wellbore, the logging probe is placed in the well with a cable, and the physical property difference of the rock formation at different depths is measured by the surface instruments and equipment, and the lithology and water quality of the wellbore are analyzed according to the site survey results. In this case, this method is called hydrological logging.

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Maintaining for the Down The Hole Hammer

April 26 , 2022

1. When start drilling, try to use a small air volume and propulsion force to make the drill bit enter the rock layer smoothly, which can reduce the impact on the piston. 2. It is very important to match the propulsion force and the model of the drill. The thrust of the propeller must change with the weight of the drill. Remember that the small Hammer should not have a large thrust, in case of the piston or drill to break on the spot. 3. Because there is a right-hand thread between the joint of the Hammer and the joint, during the drilling process, the Hammer should always be rotated to the right, and the drill should not be reckless. 4. During the drilling process of the water well drilling rig, due to stones, sand particles and cracks in the rock formation, the drill may be stuck. Therefore, it is very important to regularly use the Hammer to blow strongly and clean the bottom of the hole. Do not turn the stuck drill sharply, so as not to drop the front joint and drill bit into the hole. 5. The rotation speed usually used by the Hammer is generally 15-25rpm....

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Selecting the type of drill bit for well deviation formation

April 22 , 2022

The larger formation dip is the main reason for the well deviation, and the bending of the lower drill string and the improper selection of the drill bit type are the technical factors that cause the well deviation. From the long-term production practice, the shaft-shift type bit is likely to cause well deviation when drilling in inclined formations, so the roller cone bit with no shaft-shift or a small amount of shaft-shift should be selected. At the same time, under the premise of ensuring a small axis shift, a bit softer than the formation rock should also be selected, so that the ROP can be increased at a lower WOB, which can not only ensure the ROP, but also reduce the well deviation.

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Drilling Bit selection for soft and hard staggered formations

April 21 , 2022

Drilling Bit selection for soft and hard staggered formations In soft and hard staggered formations, generally we should choose to increase the wedge tooth or the height of the conical spherical tooth in the insert bit, so as to have a higher ROP in the softer formation and ensure the drill ability in the hard formation. However, the WOB and rotational speed of water well drilling rigs should be different during drilling. When drilling in soft formations, the rotational speed can be increased and the WOB can be reduced. In the well sections of hard formations, the WOB should be increased and the rotational speed should be reduced to achieve better geological conditions. economic effect.

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