Как нефтяные обсадные трубы входят в устье нефтяной скважины ?

Casing is nested layer by layer,the outermost layer under the deepest and shallowest coarsest,然后更深入,更薄,上图被删除了井深度结构图的关键数据,you can see,the first four openings are casing back to the wellhead,so you see the scene wellhead will not be too large,the diameter should be the inner diameter of the four-open casing,the fifth opening,the thinnest casing,down to the deepest,tailpipe suspension.

Прежде всего,套管分为表面壳, промежуточный корпус,completion casing.The function of the casing mainly has the role of carrying and sealing the formation.Due to the physical properties of the formation and the drilling process,it is necessary to drill a multi-layer casing,after drilling a section of borehole,down into the corresponding size of the casing,and then select a relatively small size drill bit to drill the next small size of the borehole,and then down into the relatively small size of the casing to seal the new formation.背面较小的套管是等等的.With the exception of the surface casing,each casing is suspended from the upper casing via the casing head,最大的外壳本身已被30使用″. К тому же,the down casing requires the use of specialized tools,and similar to the wellhead operation tool for drilling down,casings above 7″require the use of a crane.

Oil casing operations are placed under the oil well

1,the crane tube should be hoisted one by one,提升时注意周围人员的状态,并且必须使用标准起重带.

2.The drill table guard wire is worn with a rope,and the pneumatic winch is placed down,and it is strictly forbidden to throw it directly down to prevent injury.

3.When attaching the accessory,be sure to apply the sealing grease and strictly prevent damage due to misgrid.

4.在较低的套管的过程中,when the operation is stopped due to repairing equipment,replacing casing,filling mud, и т.п.,the casing should be moved up and down to prevent the casing from sticking to the card.

5.When the casing pliers are buckled,it must be buckled on the back,and it is strictly forbidden to forcibly buckle up after the wrong buckle,and the torque of the upper buckle meets the requirements according to the standard.After the wrong buckle,see if the buckle is damaged,there is a problem to throw down the replacement,if the upper buckle torque reaches the maximum,there are still three buckles or more than three buckles of the casing to shake off the replacement,if the buckle is tightened two times,仍然无法达到最大扭矩,袖子被扔下来更换.

6.袖子的过程应控制速度,而且降低速度不应大于30 секунды /root to prevent pressure leakage formation.

7.要求10slurries to be filled once,and each time must be filled;The casing must be moved when filling the mud to prevent the occurrence of sticky casing accidents,and the casing must be continuously grouted after entering the stable oblique section.It is strictly forbidden to use the mud pump to prevent the pipeline from being thrown out and injuring people. (Under special circumstances,if a mud pump is used,the protective rope must be tied or the protective chain must be tied)

8.在较低的套管的过程中,there must be a special person sitting on the post to observe whether there is a well leak(下壳的泥浆没有返回),and the overflow phenomenon(do not return to the mud under the casing).

9.After the casing is completed,check whether the number of remaining casing roots is correct.

10。After the casing is completed,fill the mud with mud at one time and then open the pump,and the casing must be loosened when filling the mud.