1,DrillingThere is always a process when sticking occurs. In order to prevent sticking, it is required to move the drilling tool frequently. Generally, it is required that the static time of the drilling tool shall not exceed3-5Minutes.

2To prevent sticking, the mud shall be added evenly when it is heavier.

3To prevent sticking, the general idea of drilling tool assembly is to increase support points and reduce contact area.

4If the drill is stuck and the bit is at the bottom of the well, and the drilling tool cannot be raised and rotated, the drilling tool shall be suspended.1/2-1/3Press on the drill bit to bend the drilling tool and reduce the contact area between the drilling tool and the mud cake on the borehole wall.

5In order to prevent the collapse of the borehole wall, the reserved length of the large borehole below the casing shoe shall be reduced as much as possible, which is generally required.1-2M is appropriate because the stability of large boreholes is much worse than that of small boreholes.

6In the shale interval, when oil or lubricant is mixed, the adsorption force of clay will be reduced, and the expansion of shale can be inhibited.

7When the mechanical drilling speed is fast, the mud displacement cannot keep up. Once the pump is stopped, it is easy to cause sand bridge sticking or sand sinking sticking.

82. When the sticking and sucking drill is soaked with the card-removing agent, it is easy to bubble the well wall across, increasing the solid phase content in the card-removing agent. When the card-removing agent is discharged, if the pump is started too hard and the displacement is too large, it is very easy for rock cuttings and mud cakes to be tightly pressed together to form sand bridges.

9In case of sand bridge stuck drilling, it is better to use small displacement circulation top to prevent direct use of large displacement circulation.

10,If mud backflow is found during tripping, tripping shall be stopped immediately.

113. After the deep well section is oriented, the hole shall be redrawn to correct the borehole wall and prevent the slim hole from sticking.

12After the oil and gas layer is drilled, the mud shall be fully circulated and the mud property shall be adjusted before tripping out;DrillingMake a short trip and observe before the first trip.4-5Hours, circulating mud test after-effect, calculate oil and gas channeling speed, only meet the conditions of construction safety, can only be tripping out.

13The connecting thread of blowout pipeline shall be applied with high-pressure sealing grease and tightened. Every5-10The meter shall be fixed with ground anchor or cement pier, and the blowout port must be fixed. The specifications of cement-based piers are0.9Meters*0.9Meters*0.9m, filled with cement mortar pouring.

144. The drilling tools used in deep wells shall be subject to a regular up-down switching system, either pumping up and down or pumping down and adding, with the aim of changing the stress state of the drilling tools and making the stress of each part of the whole set of drilling tools tend to be consistent.

15In order to prevent the slim hole from sticking, after tripping out and changing the bit, the drilling is blocked. In principle, the downward pressure is not allowed to exceed when lowering.3Tons, after encountering resistance, the pump should be opened for circulating reaming.

16,DrillingAfter coring, the regular bit shall be used for reaming or reaming in the coring section.50 Use a regular drill to ream or ream the eye once.

171. The sticking point of mud bag can only be on the drill bit, centralizer or other large tools.