US1153973A - Well-tube-closing apparatus. - Google Patents

Description

V. TACIT & V. PUSCAR|U. WELL TUBE CLOSING APPARATUS. APPLICATION man OCT. 31. m3.

Patented Sept. 21, 1915.

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WELL TUBE CLOSING APPARATUS.

APPLICATION FILED OCT. 31. I913- PatentedSept. 21,1915.

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Application filed October 31, 1913. Serial No. 798,569.

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p satisfy the above Be it known that we, VIRGILIU TACIT and VALERIU PUSCARIU, both subjects of the King of Roumania, and both residin at. No. 1 Strada Blanduzici, Bucharest, oumania, have invented certain new and useful Well- Tube-Olosing Apparatus, of which the following is a specification.

Apparatus have already been proposed for shutting down spouting bore holes, but they have generally proved unsatisfactory because in most cases the shutting down is effected too quickly, and further the mechanism for operating same is not adapted to be located at a considerable distance from the bore hole, so that if the spouting liquid or substance catches fire asfor instance in the case of petroleum wells, it is impossible to shut it down. In the case of such closing devices a chief object to be achieved is that the bore hole shall be closed very slowly and yet with certainty and with great force. Spoutings of raw petroleum which con tainslarge quantities of free gas, are generally due to a sudden diminution of pressure on the oil. The liberated gases drive large masses of oil, and gases with great force and to a great height out of the bore hole and it would be very dangerous to shut down a jet of this kind suddenly. When violent jets are shut down suddenly it often happens that several hundred meters of tubing are simply thrown out of the bore hole. The bore hole must therefore be closed very slowly in order by gradually contracting the bore hole, to first check the surging column of gas and liquid and then to shut it down altogether. Great force is however necessary for this purpose. Since spouting bore holes are very liable to catch fire automatically and in such a case it to approach the viclosing down apparatus must be such that it may be operated with certainty from a considerable distance.

is absolutely impossible The present invention has now for its oban apparatus which will stated conditions.

Two embodiments of this invention are illustrated by way of example in the accompanying drawings, in which Figure l is a longitudinal section of one embodiment showing the apparatus in its open condition. Fig. 2 is a longitudinal secj ect to provide horizontal cylinder at. In the tons. The piston 5 salt water, sand, gravel tion, and Fig. 3 is a cross section on the line 33 of Fig. 2 of a second modification of the apparatus.

On a Well tube 1 there is fixed by means of a flange 2 or in any other suitable manner a cross-shaped hollow body 3 having a cylinder 4 there works a piston 5 which may be packed by means of rings 6 like hydraulic ram pisis formed with a bore 7 the axis of which is located inthe direction of the tube 1 and has a diameter equal to the diameter of the well tube. On both sides of the bore 7 the piston is provided with guiding portions 10 and 20. By this means sand or the like and dirt is prevented from entering the ends of the hollow body under the parts 10 and 20, and accumulating in the body 3. The piston 5 is provided at both ends with recesses 8 and 9 for reducing its weight. The longer guide part 10 of the piston has a longitudinal slot 11 in which engages a screw 12 fixed in the body 3. The slot 11 coiiperates with the screw 19. to prevent the piston from turning on its axis and to also limit the stroke of the piston.

The hollow body 3 is provided at both ends with removable covers in which are re spectively apertures 13 and 14, fitted with pipes 15 and 16. These pipes are connected to a pressure fluid vessel or a pump 17 supplying pressure fluid. When pressure fluid is admitted to the pipe 15, it forces the piston 5 from the position shown in Fig. 1 downward until the tube 1 is closed. When the pressure fluid is admitted to the pipe 16, the piston 5 will move upward into the position shown in Fig. 1.

The construction shown in Figs. 2 and 3, is substantially the same as that in Fig. 1, the only difference being that only the recess 8 of the pistons 5 can be subjected to the action of the pressure fluid. ,Consequently only the right hand end of the hollow body 3 is provided with an aperture 13 specification of Letters Patent. Patented Sept. 21, 191 5.

- inlet, a piston within the cylinder recipro' cable across saidopen'i'ngs, the piston in one position closing said openings and being formed with a throughway therein adapted to be brought into communication with the openings in the cylinder and means for supplying a pressure fluid to the cylinder to actuate the piston, substantially as described.

2. A well tube closing-apparatus comprising a cylinder having inlet and outlet openings disposed between the ends of the cylinder, a piston within the cylinder, extending across said openings, and formed with a throughway normally in communication with the inlet and outlet openings of the cylinder, and means for supplying fluid pressure to the cylinder to actuate the piston to move the throughway from communication with said openings and close the openings in the operation of the piston, substantially as described.

3. A well tube closing apparatus comprising a cylinder having inlet and outlet openings disposed between its ends, a piston within the cylinder, extending across said openings, and formed with a throughway positioned nearerone end of the piston than 4. A well tube closing apparatus compris- 7 ing a cylinder having inlet and outlet openings, a piston within the cylinder reciprocable across said openings, an unobstructed t hroughway formed in the piston and laterally inclosed by a solid wall forming part of the piston, means for moving the'piston in one direction to bring said throughway into communication with the openings in the cylinder, and fluid pressuremeans for moving the piston in the other direction to entirely close said openings.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ING. V. TACIT. ING. VALERIU PUSCARIU.

Witnesses Osman Dunn, SAM HEMM.

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