US1496046A - Make and break rotary - Google Patents

Description

June 3 1924.

C. A. YOUNG MAKE-AND-BREAK RTARY Filed Dec. 14, 1921 s sheets-smet.l 1

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` c. A. YOUNG MAKE -AND-BREAK' ROTARY June 3 1924,

" C. A. YOUNG l MAKE-AND-BREAK ROTARY Filed Dec. 14 i921 3 Sheets-Sheet 3 m.. I L

Patented June 3, 1924.

UNITED STATES our. L YOUNG, or cm'rmNooeA, '.rmnssm v mm AND anni: maar.

Appnaaon mea December 14, 1921. semi-110.522,23?.

To all wlwm t may com-em.'

Be it known that I, CARL A. YOUNG, a citizen of the United States, residin at Chattanooga, in the county of Ham ton and State of Tennessee, have invented certain new and useful Improvements in Make and Break Rotaries; and I do hereby declare the following to be a full, clear, and

Iexact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in hydraulic drilling machines particularly those designed for use in drilling wells. The principal object of the present invention is to provide a rotary drilling machine of suitable and eiiicient construction that will not only permit rapid and convenient joining of the sections of drill stems together and the disconnection of same, but which will also permit easy and convenient handling of any size of pipe or casing up to the limit 'of the size of the opening in the base casting.

An important feature of the present invention is the provision of a king bushing in one or more parts so `designed and located that it is positively locked against rotation with respect to the' base and yet is readily removable when it is desired to insert or remove a large pipe or casing or a large size bit on the end of the drill stem.

A further object of the present invention is to provide a mechanism 1n which the drill pipe may be made up or disconnected with but a small amount of simple parts and in which the master bushing and the king bushing may each be left in place during the normal drilling operation.

In the usual practice with machines of a type similar to that illustrated in the drawings a two-table arrangement supported on separate bearings is provided or else the inside bushing is lifted out of engagement with the table before the drill stem can be connected or disconnected. In both of these methods considerable mechanism is required, Which mechanism is subjected to constant Wear with. a consequent liability to become defective due to such wear, whereas, in the device illustrated there are no moving parts which require bearings, exce t of course the rotary table itself. thus a ording an eflicient and simple construction accomplishing what the older types accomplislrby means of their more complicated mechanlsms.

Figure 1 is a top plan view of a device built in accordance with the present invention, partly inA horizontal section in order to show the parts more clearly.

Fig. 2 is a vertical section on the line 2- of Fig. 1.

Fig. 3 is a bottom plan view of the table base illustrating partlcularl the octagonal opening to receive the king 5bushing.

Fig. 4 is a vertical section through the master bushing and showing the wedges for holding the pipe elevated when the drive bushing has been raised out of contact with the rotary table.

Fig. 5 isa side elevation of the master bushlng and king bushing'assembled.

Fig. 6 is a plan view of the parts shown in Fig. 5.

The table base 10 and the outboard bearing base 11 which supports the main shaft on which is mounted the drive' pinion-12 are bolted together in the usual manner and are mounted upon suitable skids 14 on either side of the well opening. The rotary table 15 is supported above the table base 10 by roller bearings 16 and is provided with an annular rack 18 meshing with the drive pinion 12 on the main shaft 19, this shaft receiving its power in the customary manner.

The rotary table 15 has a non-circular central recess in which fits the central member. of the drive bushing 20, this bushing fitting the opening in the rotary table and also conforming to the configuration of the grip or grief stem 21 so that when the parts are in the position shown in Fig. 2 rotation of the table 15 will cause the stem 21 to rotate. The drive bushing 20 is preferably formed in two parts bolted together through the lugs 22 and in accordance with usual practice these parts rest by gravity on the shoulder 24 formed in the table.

The lower central opening 26 in the table base 10 is non-circular, preferably Octagonal, as shown in Fig. 3 in order to receive the king bushing 27 and to hold same positively against relative rotation with the table base while affording easy and convenient withdrawal of thls bushing whenever so desired.

The king bushing 27 has an annular lateral ange 29 which rests on the seat 30 formed in the table base 10 and has a downwardly directed octagonal skirt 31 fitting in the similarly shaped opening 2G in the table base 10. The to fiange 32 of the king bushing is provi( ed with a pair of arcuate lugs 33 fitting corresponding recesses in the master bushing 35 thus keeping the latter from turning with respect to the king bushing.

This master bushing is a two-piece casting as indicated in' YFig. 1 having a conical outer surface 36v fitting the surface 37 of the king bushing and having an upper annular fiange 38 of the same diameter as the top flange 32 of the king bushing, each of these parts being of such size as to just clear the cylindrical inner wall 40 of the rotary table.

The inner face 39 of the master bushing is made conical in order to receive the customary wedges 41 and 42, preferably three in number, which grip the pipe 44 holding it elevated and also preventing it :from rotating, this latter being accomplished by means of the vertical grooves in the wedge 42 this wedge being pro-vided with a lug 46 on its back and engaging a longitudinal slot 47 in the master bushing. The serrations on the other two slips, that is the slips 41, are horizontal as ,illust-rated in Fig. 4. y

In the normal operation of the device the. table 15 supported by the roller bearings 16 is rotated by means of the drive pinion 12 and the cooperating annular rack 18, thus rotating the drill stem 44. During the normal operation, the master bushing and the king bushing are entirelyy out oi contact with the rotating parts as will be noted from Fig. 2.

When it is desired to disconnect the sections, the string, together with the grief stem 21, is raised in the usual well known manner. When the. lower end 50 of the grief stem comes into cont-act with' the lower face ofthe conical bottom member ofthe drive bushing 20 the latter is raised free of the table. Then when the string and the drive bushing are at the desired height the slips 41 and 42 are introduced into the central tapered portion of the master bushing in order to support the sections remaining in the hole. Upon slight release of the hoisting means the vertical and horizontal serrations on the three wedges or slips will bite into the pipe and will not only support the string, but will prevent its rotation.

When the string is thus supported a vertical post (not shown) is inserted in the naeaoee socket 52 in the master bushing and a similar, but larger, post is inserted in the socket 53 in the rotary table. The backup tongs are secured to the post in socket 52 and the break-out tongs are secured to the post in socket 53, the latter tongs being secured to one or more sections above the rotary table, While the back-up tongs are secured to the next lower section. By now rotating the table the sections may be disconnected, and by reversing the direction of rotation of the table the sections may be connected.

It Will be noted that the inner surface 37 of the king ring or bushing is tapered so that it may be used with slips in connection with the break-out tongs in cases where a casing is used that is of larger diameter than the drill pipe, that is, a casing that is too large to pass the opening in the master bushing. The connecting and disconnecting of such a casing is accomplished in a manner exactly similar to that described in connection with the adding of a section to the string.

What I claim is:

1. A bushing for a rotary drill base con sisting of two nesting members.

2. A bushing for a rotary drill baseconsisting .of two cooperating members each having an inner conical tace.

3.. A bushing for a rotary drill base consisting of a king bushing adapted to tit said base, kmeans on said king bushing to prevent rotation of same in said base, a master bushing fitting within said king bushing, and means for preventing rotation of said king and master bushings.

4. A king bushing for a rotary drill base characterized by the provision of a. polygonal skirt adapted to fit the base, and a plurality of lugs on the upper face to prevent rotation of a master bushing fitting within the king bushing.

5. A bushing for a rotary drill base consisting of two nesting members having the same external diameters, and cooperating lugs on said members for preventing relative rotation,

6. In a rotary drill mechanism, a base, a king bushing supported within said base, means carried -by saidking bushing for preventing relative rotation of said bushing and said base, a master bushing fitting Within and supported by said king bushing, and means for preventing relative rotation of said king bushing and said master bushing.

cani. A. YOUNG.

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