SU125214A1 - Device for automatic filling up of wells when lifting a drilling tool - Google Patents

Description

Devices and methods are known for producing topping up a well with a clay solution, by opening and closing a valve or by pumping a solution through a hole. This method of topping has a number of disadvantages, the main of which are: large losses of the mud from the "siphons", due to the filling up of the wells to the mouth, and also from the partial absorption of the solution due to the excess of the static level; unproductive expenditure of time required for topping up when lifting a tool; the dependence of maintaining topping on the use of manual labor drilshik.

The proposed device eliminates these drawbacks in that it uses a metering cylinder, driven by a pneumatic cylinder from the air system of the drilling rig. Such an embodiment of the device Provides automatic maintenance of a static fluid level in a well. The drawing schematically shows a device for topping up wells.

The device consists of a topping tank 1 with a metering cylinder 2 mounted into it, the volume of which can be adjusted with the help of the removable cover 3 depending on the diameter of the drilling tool (pipes) used; a hollow piston 4, the horizontal stroke of which is carried out by a pneumatic cylinder 5. with a piston 6 under pressure introduced into the body and under the action of a return spring 7, a rod 8, a pneumatic cylinder 5 rigidly connected with the rod 9 of the metering cylinder 2, transmitting the hollow piston 4 horizontal directional movement from injected air to one side and from the action of the return spring 7 to the other. Pneumatic cylinder 5 is connected to the overhead line of the drilling rig going to the rotary tire-pneumatic couplings. The cylinder 5 is connected to the air line following an air gap through a 10 N triple air valve 11.

The pipe and the flap of the spark plug, the air entering the rotor couplings with a rotor, fill the device 5 with the help of the device. In this case, the piston 4 occupies the leftmost position and opens a window 12 through which the solution pours out of the metering cylinder 2. At the same time, the piston 4 blocks the solution inlet through the window 13 of the filling capacity / into the metering cylinder 2. When the rotary coupling is turned off by the action of the spring 7, the piston 6 moves to the extreme right position, during which the dosing cylinder 2 is filled and the solution is stopped in the well.

The filling of the dosing cylinder 2 with the solution, as well as the pouring out of the solution from it, is provided by the dosing cylinder 2 with the atmosphere through the tube 14.

Subject invention

A device for automatically filling up a well when lifting a drilling tool, characterized in that, in order to continuously maintain the static fluid level in the well, it is made with a metering cylinder installed in the tank, the stem of which is rigidly connected to the rig of the pneumatic cylinder of the air system of the drilling rig.

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