I. Overview of the mud pump 1 Introduction The mud pump is a kind of reciprocating plunger pump, which converts the rotary motion of the motor into the reciprocating linear motion of the crosshead and the piston through the crank connecting rod mechanism, and compresses the low-pressure mud into high-pressure mud. During the construction of directional drilling, the mud with …
In trenchless construction, pipe jacking construction should be very common, and some small details of pipe jacking construction will be introduced next. What is pipe jacking construction? Pipe jacking construction is a non-excavation construction method. It is a pipeline burial construction technology with no or less excavation. It is an underground pipeline construction method developed after shield construction. It does …
1. What are the common problems in the construction of ultra-long-distance horizontal directional drilling through pipelines? (1) Steering construction: The main problem is that the instability of the drill pipe is difficult to control and the drilling trajectory is difficult to measure in real time. (2) During the reaming construction: there are dangers such as “holding the pole” and “collapsed …
1 Characteristics of directional drilling construction of long-distance pipelines Directional drilling through construction will not hinder traffic, will not destroy green space, vegetation, will not affect shops, damage and adverse effects on traffic, environment, surrounding building foundations. There is no water or underwater operation, it does not affect the navigation of the river, does not damage the dykes and riverbed …
Before starting the trenchless drilling rig, the following preparations must be made to ensure the smooth progress of the construction: 1. Construction site detection: use detection instruments to find out the direction, depth and nature of the original underground pipe network, and make a mark; 2. Check that the oil level of the hydraulic oil tank should not be lower …
In trenchless construction, some technical difficulties will be encountered during horizontal drilling. Generally speaking, these 11 aspects are included. 1. Stuck drill Sticking is a common technical difficulty in hole reaming. If stuck, analyze and identify the cause and then deal with it. 1. If the drill is stuck in contact with the underground pipeline, withdraw the drill bit, drag …
The pilot hole is the first step in the construction of trenchless engineering, followed by reaming. Managed jobs are based on this. Whether the quality of the guide hole, such as the turning radius of the deflection section, the smoothness of the trajectory curve, and the position of avoiding underground obstacles, is directly related to the success or failure of …
In the construction of long-distance horizontal directional drilling through pilot holes, due to the large frictional resistance between the drill string and the hole wall, the rotation of the drill bit obviously lags behind the rotation of the drilling rig power head, which makes it difficult to control the downhole tool face angle. , so that the steering accuracy is …
More recently, the industry has introduced systems that allow the installation of folded plastic pipe relining products through manhole entrances. These systems, known as FFP systems, utilize thermoplastics that have been deformed from a circular shape (i.e. folded) to produce a smaller net cross-section that can Easily feed it into existing sewers. These FFP products are typically extruded PVC or …
1. Classification and performance of mud 1.1 Classification China’s bentonite resources are very rich, including calcium-based bentonite and sodium-based bentonite, in addition to hydrogen-based, aluminum-based, sodium-calcium-based and unclassified bentonite. Bentonite, also known as bentonite, etc., is a clay rock with montmorillonite (also known as microcrystalline kaolinite, kaolinite) as the main component – montmorillonite clay rock, often containing a small amount …
