Downhole tools for oil rigs include: stabilizers, scrapers, centralizers, etc.
The replaceable sleeve stabilizer are available with
two-piece and three-piece construction. The three-piece construction stabilizer
is made of a body and a centralizing body(refer to sleeve replaceable). The
advantage is that the sleeve can be changed quickly and easily after sleeve
hardfacing is worn-out. This kind of stabilizer is especially suitable for
working in directional well .
Downhole Drilling Tools,Drilling Tools,Oil Production Tools,Downhole Auxiliary Tools Rugao Yaou Import & Export Trade Co., Ltd , https://www.ntyaous.com
The lack of speed increases the cycle working time of the jacks and thus affects the production efficiency. Underspeed phenomena often stop moving under heavy loads. This affects the ability of the jacks to work properly.
1 First, solve the problem that the output flow of the hydraulic Pump is insufficient. In particular, it is necessary to solve the problem of whether the pump flow at the maximum working pressure is significantly reduced.
2 Check whether the overflow valve is always overflowing. The overflow valve is permanently deformed or misplaced into a weak spring, and the main valve core damping hole is partially blocked. The main valve plug is stuck in the position of the small opening, causing the hydraulic oil output from the hydraulic pump to partially overflow into the fuel tank, leading to the system. The effective flow of actuators is greatly reduced, making the speed of rapid movement insufficient.
3 Check the hydraulic cylinder or hydraulic motor for serious internal leakage. Check the hydraulic cylinder leakage and take countermeasures.
4 Check if the valve opening of the flow Control valve is too small or the valve plug is stuck in the small opening position. Re-adjust, remove and wash.
5 Check the internal and external leakage of the system. Find out where internal and external leaks occur, eliminate internal and external leaks, replace worn parts, and eliminate internal leaks.
6 Check whether the oil temperature of the hydraulic system is increased. Increased oil temperature reduces oil viscosity, increases internal leakage, and reduces effective flow. The oil temperature must be controlled.
7 Check the load, especially whether the additional load is too large. The working speed of the load increase will generally be reduced. In particular, the additional load, such as the rail lubrication oil, the guide rail trim pressure plate is too tight, the hydraulic cylinder installation accuracy and poor assembly accuracy and other reasons, resulting in increased load when the additional load , will significantly reduce the operating speed of the actuator.
Why does the jack have a slow reciprocating motion?
The so-called underspeed refers to the phenomenon that when the jack is fast moving, the speed is not fast enough, and the working speed (work advance) under the load decreases significantly with the increase of the load. The speed is generally related to the amount of flow provided.