US1482163A - Method of and means for freeing jammed earth-boring columns - Google Patents

Description

Jan. 29 1924. 1,4821 63 J. STREDA METHOD OF AND MEANS FOR FREEING JAMMED EARTH BORING COLUMNS Filed Dec 4, 1922 lt m'mm i 7 3 l a r '1 Mfr! /a 4 5 1 l 6 8 in 8 f/wenforz Patented Jan. 29, 1924.

p gTgDj STATES meals Persian" oFF cE.

JOSEPH STREDA, .OF LONDON, ENGLAND.

METHOD or AND MEANS roe rsnnrns JAMMED EARTH-BORING. COLUMNS.

Application filed lieccmber siesta. Serial No. 604,947.

To a]! w/tom it may concern. I

Be it known that L JosErn STREDA, a citizen of the Czechoslovakian Republic, re siding at London, England, have invented a certain Method of and Means for Freeing dammed Earth-Boring Columns, of which the following is a specification.v

In the boring of petroleumfand like wells,

it sometimes happens that, the boring column gets jammed in the surroundin sand or like strata and defies removal. T he object of the present invention is to provide means for the freeing of such columns, and the invention consists in subjecting the column to the simultaneous effect of pressure and percussion, while in some .cases a jammed column may also be filled with liquid by wayof facilitating the loosening of the earth. i 1

Fig. 1 of the drawings represents a side view of the device whereby the method may be carried into effect, and

Fig. 2 is a view at'right angles to Fig. 1,

and showing a slightly modified arrangement.

The figures show the'surface part of the boring column which is in this case composed of three concentric pipes 1, 5 and 8. The outer pipe is a .rivete d one and it is supported on joists 4: by means of clamping collar 3, the latter being applied to the pipe immediately beneath the connecting sleeve 2. On this sleeve rests another clamping collar 7 which isapplied to the next pipe 5 beneath a sleeve 6. The pipe 5 is seamless and is screwed into the sleeve 6. The inner pipe 8 is the one which is jammed and which is therefore to be subjected to the freeing process. For this purpose another pipe 10 of the same size is connected thereto by means of a sleeve 9. The pipe 10 passes between ioists 22 and 23 through the floor 21 of the boring tower. Planks 40, arranged above the floor at opposite sides of the pi pc and t right angles to the joists, are clamped to the latter by means of screw bolts. The planks 4:0 serve as abutments for hydraulic pistons 29 the cylinders 29 of which are used for applying pressure to the pipe 10. According to Fig. 1 the cylinders are supported on the pipe 10 by means of a dog 241 which is secured to the pipeby means of wedges 25 inserted from below. A piece of wood 26, a metal plate 27 and a sheet 28 of some flexible material are interposed one after the other between the dog and each cylinder. Similar paddings are interposed between the pistons and the planks 10.

According to Fig. 2, the do is replaced by two superposed sets of plan is 34 and 35 arranged at right angles to one another and clamped to the pipe 10 by means of screw bolts.

A sleeve 11, screwed on the upper end of the pipe 10, carries an anvil head 12. This head is fitted with hooks13 which, in the arrangement shown in Fig. 2, are connected by rods 38 to the lanks 3 1 and 35 so as to communicate the pressure on the latter partly to the top end of the pipe. Each rod 38 has at one end a shackle 39 whereby it is connected to the hook 13, the other end being eyed and connected by means of a bolt"-7 to a. forked screw-bolt 36 holding the planks. A central aperture is provided in the head 12 throughwhieh a rod 17 is admitted into the boring column.' This rod carries at the lower enda chisel 18 and at the upper end a union by means of which it is connected to a cable 16,. the latter being used in'knOWn manner for raising and dropping the rod. Acollar 19 which is clamped by meansof screws 'to the rod 17 strikes against the head 12 when the rod drops and transfers the impact to the pipe 10. To support the pipe 10, after it has been freed and to reduce the shock if the pipe should drop, two buffer-heads 33 with springs 32 are arranged on the planks 10, the pipe be ing furnished with a collar 14 for abutment against the buffers. A pipe supplies water under pressure to the hydraulic cylinders, and a pipe 31 leads off the dis charge.

For the freeing of a jammed column there should be a free space underneath it, and if not already in existance it should be formed by boring. Then the ammed column is filled with liquid, such as clayey water, which doesnot form any deposits. In the absence of clayey water petroleum may be used. A considerable pressure is set up by the liquid at the bottom of the bore-hole, and the liquid penetrates the strata and forces an upward passage between the earth and the column. Meanwhile the hydraulic press is erected and pressure, which must not overtax the resistance of the pipe, is applied to the latter. After a certain pressure has been obtained, the percussion rod 17 is set in motion. The vertical 1y directed blows set up vibrations which exfew strokes. up and down tocomplete .the 1 operation. Theother pipes, if also jammed, maybe freed in the same manner,-the ,deep est, pipe being treated first.

ln some cases the freeing of they pipes may be effected Without the use of liquid.

In .cases. where .water has to be excluded from the. bore hole, the device may conveniently be used-for boring purposes. In thiscasea ratherdeep anditruly cylindrical hole support so,as;to transfer part of the pressure tosaid headpa percussion rod guided is boredin advance in the .usualmanner and the pipe left somedistance downthe hole.

l .draulic ress'ur'e -is then a liedto thev I i y p pp percussion rod so. as to: strike, against the column until it: sinks into the hole... After some sinklngthe hole 1s. clearedoutwhereeuponpressure-,is again applied: to the column.- When pressure is no moresuflicient for sinking the column, pressure and per cussion may be used alternately. In this manner great depthsmay be attained with a 7 space below the lowest end of the column, fillingthe j ammedcolumn with a liquid and then subjecting such column to simultaneous downward pressure and percussion.

3. A device for. freeing jammed earth boring columns, comprising a pair of hydraulicpresses, a rigid support for the pis- .tions of such presses, means for supporting the cylinders ofsaid presses on the jammed pipe for exerting downward pressure thereon, andmeans for 'drivingthe. pipe by percussion, While the pressure 4:. A device, for freeing jammed earth boringcolumns, comprising a pair: of hydraul c presses,.a rigid support for the pistons of such presses, a cylinder support secured tov the jammed column for transmittingpressure to the .same, a head secured to the npper end. of .the jammed column, rods connecting said.head with the cylinder in said head, and a collar connected to the head ,for, vibrating the column.

5. A. device for freeing. jammed earth boring columns,comprising a pair of hydraulic presses, a rigid support for the pistonsof such presses, a cylinder support'secured tothe .jammedcolumn for transmitting pressure to the same, a head secured to the upper .end of the jammed column, rods connecting said head with the cylinder support so as to transfer part of the pressure to;said head, a percussion rod guided in sa i d. head,.a.collar. connected to the percussion rodso to strike against the head for vibratingthe column, a collar connected to the upper part-oftl e jammed column, and buffers mounted on t e piston support so as to take up the support of the sinking column by abutment against saidlatter column,

JOSEPH STREDA.

1s applied.

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