US1049151A - Well-boring tool. - Google Patents

Description

A. ROTINOFP.

WELL BORING TOL.

APPLICATION HLED DEG. 2o, 1911.

Patented Dec. 31, 1912 rwswn Eggi l @if l sri-iras manna onirica.,

ALEXANDER RTINOFF, OF ST. PETERSBURG, RUSSIA.,

WELL-BORING TOOL.

Spcication of Letters Patent. l

To aillwhom nitmay concern: l

Be it known that I, ALEXANDER Ro'riNorr, a subject of the Czar ofl Russia,.residing at St. Petersburg, Russia, have invented cer,-v ktain new and useful Improvements 'in Well- BOIng Tools, of whichthe following isa Specification.- Y

This invention relates to new and useful. "improvementsinwell-boring tools and .re-

fers .particularly to contractible heads therefor.

The object of this inventionis to provide a well-boring tool which can be vwithdrawn,

with ease and operates with certainty.

To `more particularly disclose one convenient way of constructing the contractible head according to this invention,4 reference is made to the accompanying drawings,

inwhich:-

Figure l is a part sectional elevation through the head showing the same in its contracted state; Fig. 2 is a similar viewA but'shows the head with the parts in their .expanded-position; Fig. isA a. section Aon the line P-Q viewed inl the direction of the arrow Z the right-hand part of the view showing the position of the various parts when the head is contracted as in Fig; l, and the left-hand part of the view showing these parts in the expanded osition. In a head of this 'description used in a sinking tool, a conical or similar form is employed and the base of this conical head,

.made ofrigid sections, is contractible. The

head is so constructed thatwhen its tip is unsupported from below Qr when apull is exerted on it, the diameter of the said head is reduced automatically to an extent sufficient to enable it to travel up and down without hindrance through the tube or borehole. The stoppage of the tip of the head by the ground while the ydescent of other portions of the tool continues will result in the 4 automatic expansion of the conractible portion of the head to its maximum dimension. The rigid sections forming the contractible part or base of the conical head are sojdisposedthat their faces with or without-those of the head, present a single smooth externa-l contour when the contractible part is expanded. For such a contractible head, mechanism is provided which isconstructed to contract the head by moving the sections inward in succession and characterized by that constructionvin such a manner that ituacts positively, is ini elastic and vunyielding. The contraction a Patented Dec. 31, 1912. l Application ined December 2o, 1911. 'serial No. 666,908.

and expansion vof the head is brought abouti by an operative connection with` the monkey or with thefsuspension rod of the sinking tool- Referring to the drawings and 4more particularly to Fig. Q,UA is a -rod' which, inl

conjunction with the sleeve B, is operatively connected in any convenient way to the monkey indicated at C; The rod .A slides within Y the tube or sleeve Band takes a bearing Within' the Platter on the enlargements Al A2'A? formed upon itself. Atits lower end B1 the-- sleeve B is screwed Vinto `the conical head E which constitutes the working `portion ofthe tool and'is provided at E1 with vfollow Aany movements of the rodvA. The

sleeve Fjhas' a flange-,F1 at its lower end and at fits upper `end is provided with a ring F2 which screws over the sleeve as shown provided with shaped recesses at F3 lwhich coperate with similar recesses F 4 y formed within the upper partof the sleeve.

The ila-ngel?l is also drilled at F 5. The recesses at'F2 and ,F2 in the cap- F2 and sleeve F grip [the T-shaped v heads Gl of shaped strips G2. G3, while the 'holes at F5 receive de wel pins Gr2 alsol formed on the strips `G2 G3 which are shouldered at G5 to abut against the upper side of the flange F1 so as to position them and `hold them vsecurely in place. The sleeve F has short project-ing shaped webs G6 G7 which coperatel with the strips G2 G3 respectively'to form the cam' slots GX Gy indicated in the draw- These slots receive rollers H H1 ings. mounted respectively on spindles H2 H3, which spindles are secured in the pairs of arms H4 H5 which project vinwardly from the pieces K K1- of which they form a part. The pieces K are, as will be seen from a reference'to Fig. 3, of approximately seg- -a hardened orv other specially -treatedpoint. Y

mental shape in plan while the pieces K1 are wedge-shaped-and narrow. The segments are beveled at K2 and rounded at K3 and `conform, asv also do the wedge-shaped pieces, to the general shape of the conical head E as regards their vertical section..

The segmental pieces. in their expanded position, do' not quite ll up the periphery; the pieces "lill therefore of such width that 'when `theymove outward for the expansion of the head, the external contour of the latter is smooth and unbroken.

rl"he conical. part E, the expanding partd made up of the pieces l and li? and the upper part of the head D, are recessed suitably at E3 l@ and D2 to permit of movement of the various parts contained within. them. rlhe part D of the head is also` recessedas at D3 to receive the spring L which abuts' upon the end .Di of the clearance vD3 and exerts pressure upon the end FG of the sleeve l?.

-rlhe part lil of the lower or conical part lil of the head lpasses upward through the cony tractible part thereof andat E is threaded to receive the correspondingly threaded upper part D as indicated by lig. 2. The part E5 is slotted as at E7 to permit of the pasvsage of the operating mechanism of the con.-

tractible portion'of the head. The part D is clear of the latter at D5 andv not only does not interfere with the motion of the operatving mechanism but by its construction transmits the. blows of the monkeydirect to `i the"workingy point of the lhead and not through )thevarious sections or through the `operating mechanism. 'Sinking tube is -to the segmental pieces K and the. wedgeshown at Q.'

The slots Gl Gyrespecti'vely represent sets of slots shown in Fig. 2 which correspond shaped pieces K1. Each of the set of slots represented by GX is of different shape from Veach of the set of slots represented by Gry, .'jthatis to say, Gy is more sharply -inclined to the-verftical center axis ofthe head and the inclined portion of it commences at a point* nearer to its lower endend finishes at a point nearer the upper end than is the case with a slotbelonging to the G group.

ln operation, the movement of the mon-V key C in the. position of Fig l, causes the `rod A. tomove downward should any of the parts stickand during the descent of .this

monkeyandwith it the rod A, the sleeve F is caused bythe spring L to move down- Wa'rd'so thatfthe rollers H and H1 move relatively up their respective cam slots Gx and G1' yand so force the arms H4 H5 to which they are respectively pinned, tomove radi from that of the v slot Gx the pieces K will move first to/theirexpanded position as. shownby the left-hand'half of Fig. 3 and a little later on' the pieces K1 .willbegin to ally ontward'from the center. of the head fand thus to carry outward thev respective ieces which they bear. Because of the diferent inclination and shape of the slot GY move outward so as to fill up the spaces which are left between the expanded -segmental pieces Whenfthe monkey 'Gis withdrawn by any means ,which may be con.-4

thehead move insuccessionmthe head can only be contracted when the parts K1 are moved clear ofthe parts K. The maximum external diameter of y the 'head may. be greater than that of the sinking tube' when such is used and its .minimum 4diameter may be less than thefinternal diameter ofthe sinking tube so thatwithdrawal of thel head is rendered very easy.' lt will be seen that external pressure of the soil in the borehole or of water which may be present there cannot readily causa the head to contract as the parts, rigid and `unyielding, are to a large extent interlock `ing in their expanded state. Nor can the working of the tool be easily interfered with as Vthe head presents a single smooth external' 'contour in its vexpanded position. The

operation of contracting .the head may also be performed by an operative connection with the suspension rod on which the whole t'ool may be carried. t"

to secure by Letters Patent is 1. In a well-boring tool, heicoinbination with .a suspender therefor, of a head with a Atapei ended lower portion comprising'mov'- able sections presenting a single smooth anj nula-r,` external contour, means operatively vconnecting thesaid sections and the sus-Ar penden ,to automatically move said sections to reduce and enlarge the diameter of the said lower portion by a non-rotary' recti linear movement of the suspender, substantially as described..

2,111 a well-boring tool, a head with a 'taper-ended lower portion, `anexpansible anf nular series of' laterally movable 'sections at the heel of the tapered part, mechanism for expanding y'and c ntracting` the sections, a

vWhat l claim as my invention and desire monkey, and an element coxmectin'gv the monkey .andthe said ymechanism whereby -a non-rotary rectilinear 'movement of the "monkey"A cangexpand and contract the sections,' substantially as described.

3. In Va well-boring t l, a'. head-with a taper-endedlower portion, an lexpansible annular series of' laterally movable sections at the heelof the tapered part, mechanism for` 'expanding andcontracting the sections, a monkey`, ad fa loaded rod movable 'in the direction fof-wits length in a plain ide in vthe.head andgconn'ecting the mon ey and thesaid mechanism,.whereby a non-rotary rectilinear vmovement ofthe monkey can ex Cil la. taper-ended lower` portion, an inflexible pand and contract the sections, substan* tially as described.

4:. In a well-boring tool, a head with a taper-ended lower portion, an iniiexible eX- tension 'upward from the tapered portion to receive and to transmit direct to the said lower portion the blows of a monkey, an expansible series of laterally movable rigid sections which is so shaped as to present a. single smooth annular external contour located at the heel" of theY tapered part and below the said extension struck by the monkey so that the driving shock from the monkey shall be transmitted to that tapered part otherwise than through saidseries, sub.. stantially as described. v

5. A well-boring tool having a head with extension upward from and-immovable in relation to that tapered portion and receiving the blows of the monkey, guides consti-V tuted by the top of the tapered part together with an opposed end-face of the aforesaid iniiexible extension, and an expansible series of laterally'movable rigid sections in those guides and so shaped as to present a` smoothly curved non-stepped vannular external contour when expanded and also when contracted, substantially'as described.

6. In a well-boring tool, an expansible series of laterally-movable rigid sections with-eXpanded their faces so disposed that the sections when expanded present a smoothly curved non-stepped external contour, in combination with a mechanism which is positive and` is constructed to contract and'expand the series by moving the sections inward in succession, substantially as described. l

7. In a Weltbor'ing tool, an expansible se-V Aries of laterally movable rigid sections A9. 'A well-boring tool having a head provided with a tapered portion, a plurality of arc-shaped members movably mounted Yin said head, a plurality of wedge members movably-mounted between said arc-shaped members, and means l:tor movingy said arcshapedmembers and wedge members in' a radial direction, substantially as described.

l0. A well-boring tool having a body portion, a tapered head iXedly connected thereto, a plurality lof radially movable members slidabiy mounted between the body and the head, said members forming a frustum oa-cone when in their expanded position,

and means y-for moving said members in a radial direction, the moving means forming a lock to retain lsaid members in their position, substantially as described.

In testimony-wh`ereof I havev signed my name to-this1speciication in the presence of two subscribing witnesses.

EXANDER ROTINOFF. Witnesses T. BATES, HARRYjB. BRIDGES.

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