US1925314A

US1925314A - Rotary draw works

Info

Publication number: US1925314A
Application number: US473808A
Authority: US
Inventors: David S Faulkner; Timbs Edward
Original assignee: Nat Supply Co
Current assignee: National Supply Co
Priority date: 1926-06-21
Filing date: 1930-08-08
Publication date: 1933-09-05
Anticipated expiration: 1950-09-05

Description

D. S. FAULKNER ET AL Sept. 5, 1 933.

ROTARY DRAW WORKS Original Filed June 21. 1926 2 Sheets-Sheet l D. s. FAULKNER ET AL 1,925,314

ROTARY DRAW WORKS 'Sept. 5, 1933.

2 Sheets-Sheet 2 Original Filed June 21. 1926 1 7 i 3 =1: 42 g 0 1 J08 119 O :45, f i\ 102 0 J! 108 11 O K C) 1/0 3 If if 407 10.9 1/6 I 9 G 113 1 w R WV 1 1 2 M r; 4- U \M 1-4 120 M Patented Sept. 5, 1933 STATES ROTARY DRAW WORKS David S. Faulknerand Edward Timbs, Los Angeles, Calif., assignors to The National Supply Company, Toledo, Ohio, a corporation of Ohio Qriginal applications June 21,

1926, Serial No. 117,322 and November 9, 1927, Serial No. 232,084. Divided and this application August 8, 1930. Serial No. 473,808

4 Claims.

This invention relates to a rotary, drawworks such as is employed in the rotary process of drilling wells. e

This application is a division of our copending application for rotary drawworks, filed November 9, 1927, Serial No. 232,084,-which application is a division of our copending' application for rotary drawworks, filed June 21, 1926, Serial No. 117,322.

An object of this invention is to provide a rotary drawworks in which there is provided a spaced brake means for braking the rotation of the drawworks drum and in which. braking means there is provided a means for adjusting the looking in position the dead ends of the brake band.

Another object of this invention is to provide a new and improved form of brake band for use in connection with a rotary drawworks.

Another object'of this inventionis to provide a rotary drawworks construction including a pair of spaced brake rims having brake bands passed over said brake rims and means for adjustably securing the dead ends of said brake bands, said meansincluding latches adapted to be engaged with said adjusting means for locking the adjusted and dead ends of the brake band.

Other objects and advantages of this invention will be apparent from the following detailed descriptionof a preferred embodiment thereof, as illustrated in the accompanying drawings, in which drawings:

Figure 1 is a side elevation partly in vertical mid-section of a rotary drawworks embodying this invention. I

Figure 2 is an end elevation thereof, illustrating the low speed sprocket as broken away to illustrate the forged brake rim construction and brake bands mounted thereon. I

Figure 3 is a detached, fragmentalj view of a brake band construction embodied in this invention and illustrating the brake securing means as provided for securing the dead end of the brake bands embodied in this invention.

In the preferred embodiment of this invention, illustrated in the accompanying drawings, 1 illustrates the floor of the well derrick.

A rotary drill stem is supported upon a hydraulic swivel, (not shown) but which is well understood in the art, from or by a cable which passes over the crown block of the derrick and is wound upon the drum 3 of the rotary drawworks 4 which is mounted upon the derrick floor 1. r

It isessential that the drawworks 4 be as compact as possible, that is, that the distance between the outer posts 5 and 6 thereof be maintained at a minimum so that the rotary drive sprocket 6a, which is carried upon the line shaft 7 of the rotary drawworks 4 will align with the drive sprocket of the rotary drilling machine, and also so that the catheads 9 of the rotary drawworks 4 will not be extended .too far from alignment with a rotary tableof the rotary machine, (not shown) as the catheads 9 are employed with a cat line in a manner well understood in the art for operating the tongs and like devices as used for the screwing up and unscrewing of the drill stem sections and for like purposes during the rotary process of drilling.

It is also essential in a rotarydrawworks that the line drum 3 thereof be in position so as to maintain the cable 11 thereof in approximate alignment with the crown block sheave over which the same is passed.

' In the drilling of deep Wells, particularly wells of five thousand feet in depth or over, it is particularly desirable that the drum 3 be not only of increased length between the flanges thereof, but that the diameter of the spool of the drum 3 be large so as to prevent variation of the speed of travel of the line 11 which is wound thereon as the'said line is coiled upon the said spool. The increasing depth of wells, of course, necessitates the provision of increased drum area for winding the line cable and this increased demand for length of the drum 3 must not require an increased spreading of the posts 5 and 6 of the drawworks 4. In order to permit wide variation of operation of the rotary drawworks, according to the conditions met during the drilling of the well, it is preferablethat the drawworks be pro.- vided with considerable speed variation for driving the drum 3. For this purpose, the drawworks is provided with three speeds, any one of which may be operated to drive the drum 3, The line shaft 7 of the rotary drawworks 4 is driven by drive sprocket 6a isloosely journaled upon the shaft 7 and is preferably provided with a jawclutch 15 for releasably engaging the sprocket .6a with the line shaft 7 when it is desired to operate the rotary machine, and. which sprocket 6a maybe disengaged from the line shaft 7 for hoisting or lowe-ing the drill stem into the well hole being formed. The jaw-clutch may be of any desired or preferred construction and is herein illustrated as comprising a clutch collar 16 which is slidably keyed to the shaft ,7 so as to permit longitudinal. movement of the collar 16 on the shaft "1 and so as to prevent rotation of the collar 16 relative to the shaft 7 so that the jaw engaging face 17 of the clutch collar 16 may be moved into engagement with the jaw clutch engaging face 18 which is preferably formed integral with the hub of the sprocket 6a. The collar 16 an annular groove formed therein into which pins carried by the fork 19 extend for sliding the collar 1.6 on the said shaft 7. The fork 19 is pivctally supported by means of a bracket 20, which bracket 20 is secured to the beam 21 which connects the posts 5, 6, and 14 of the drawworlcs at their upper end. An actuating rod 22 is secured to the fork 19 at a pin 23 and is secured to an actuating lever 24 at its opposite end at a pin 25.

A pawl and ratchet latch means 26 are provided for latching the clutch collar 16 into driv ing engagement with the sprocket 6a and the pawl and ratchet means and actuating lever 24 are positioned at the left of the drawworks, as

illustrated in Figure 1, so as to permit easy access of the operator of the drawworks from such position. Keyed to the line shaft 7 is a low speed sprocket 2'7, an intermediate speed sprocket 28 and a high or third speed sprocket 29.

' Mounted below the line shaft '1 and in bearings 30 is a drum shaft 31, upon which drum shaft 81 low, intermediate and third speed sprockets 32, 33 34 are journaled, each of which sprockets is provided with clutch means for releasably engaging the same with the drum shaft 31, as will hereinafter be described. The drum 3 is keyed to the drum shaft 31 and is preferably constructed of a spool 35, which spool 35 is preferably'constructed of a spool portion 36 which has, at its opposite end, downwardly-inclined integral flanges 3?; which are formed integral with the oppositely extending hubs 38 whichare keyed to the portions 39 of increased diameter of the drum shaft 31; A plurality of webs 40 are cast integral with the cylindrical portion 36 of the drum 3 for reinforcing the same. Formed integral with the spool 35 are outwardly extending annular flanges 41 which are formed at the opposite end of the cylindrical portion 36.

The outer edge of the rim 42 is formed with an upwardly extending flange 44 which provides a retaining rim for retaining the brake band 45 against lateral movement upon the rim 42. The brake rim. 42 provides a braking surface 46 which is preferably hardened by any of the well known processes and the rim 42 ,is formed at its inner end with an inwardly extending annular flange 47, which annular flange 4'? provides an edge shoulder 48 which fits the edge shoulder 49 formed by the annular abutment 50 which is formed integral with the flanges 41 of the spool 35. Rivets 51 are countersunk in the flanges 41 and extend through the annular flange 4'? and are riveted over within the brake rims 42 so that a substantially fiat surface is inaintained at the interior of the spool flanges 41.. The annular flange 47 of the brake rim 42 is cut away at a plurality of points to accommodate keys 53 which fit within the cut away recesses and which are secured to the flanges 41.

The keys 53 are preferably secured to the flanges 41 by means of counter-sunk rivets 55. The rivets 51 and 55 are preferably cold-pressed into position by means of a jack interposed between the flanges 41 and their inner ends are then heated by means of an acetylene torch, or the like, and riveted over by the use of a hydraulic riveting machine.

The hub 38 at the left-hand end of the spool 35 is formed so to extend into the interior of the forged brake rim 42 and of sufficient length or extent to provide a firm bearing support for the drum 3 at that endand extends into the drum 42 so as to engagethe end face 56 of the low speed sprocket 32 upon the drum shaft 31. In order to accommodate'for the clutch 57 of the third speed sprocket 34, the hub 38 formed at the right end of the spool 35 extends inwardly into the interior of the cylindrical portion 36 of the spool 35 and extends only slightly into the interior of the right hand rim 42 and is of suflicient extent to provide a firm bearing support at this end of the drum 3; This hub 38 at the right hand end of the spool 35 extends inwardly into position as before described, so as to permit the mounting of the clutch collar 58011 the line-shaft 31 for reieasablysecuring the third speed sprocket 34 to the shaft 31.

The brake bands 45 which are mounted upon the brake ims 42 are preferably constructed of a band 1G2, to which band 102 the brake lining 193 is secured by means of counter-sunk bolts or rivets 164 which are counter-sunk in the brake lining 103 and extend through the brake band 102. The brake linin 103 is sawed at a plurality of points so as to enable the same to more accurately follow the contour of the brake rims 42.

Any suitable or desirable form of brake actuating means 166, as is well understood in the art, may be provided for actuating the brake bands 45 and the live end 107 of the brake band 45 is secured to this brake actuating means 106 in any desired or'preferred manner; I p

The brake actuating means 106 as illustrated in the drawings may consist of a brake shaft having a pair of crank arms to which the live ends 107 of the brake bands are connected. A handle is secured to the shaft for rotating the same to tighten or loosen the brake'bands'on the shaft.

The dead end 108 of the brake bands 45 is secured to an eye bolt 109 in any desired or'preferred manner, as illustrated at 110, and extends through the floor 1 of the derrick through a bracket 111 which is secured to the floor 1. 'Within the bracket 111 is a collar 112 which collar 1 12 is screw-threaded to the end of the eye-bolt 109 so as to adjustably and firmly secure the dead end 198 of the brake bands 45;

Lock means'are provided for locking the collar 112 in the adjusted position, which lock means preferably comprise a lock link 113 which is pivotally secured at a pin 114 supported by the bracket 11.1 and'which lock link 113 has a locking recess 115 formed at its engaging end of substantially the shape to engage the hexagonal head 116 of the collar 112 so as to prevent rotation of to the rear face of the brake band 102 and extends around the brake band 102 and is secured to'the derrick floor at 120 so as to support and hold up the brake band 45 when it is not desired to operate the same. The turn-buckle 118 permits accurate adjustment of this holding means so as to adjust the non-operating position of the brake band 45.

. Having fully described a preferred embodiment of our invention, it is to be understood we do not wish to be limited to the exact details herein set forth, which may obviously be varied without departing from thespirit of our invention, as set forth in the appended claims.

We claim:

1. In a rotary drawworks, the combination of a pair of spaced posts, a drum shaft rotatably supported by the posts, a drum mounted on the shaft, spaced brake rims secured in position at the opposite ends of said drum, brake bands passed over the said brake'rims, means for adjustably securing the dead ends of said brake bands, said means including brackets, means for securing the brackets in position, collars mounted within the brackets and adapted to be adjustably secured to the dead ends of said brake bands, lock means pivotally secured to said brackets and adapted to engage said collars to lock the same in adjusted position.

2. In a rotary drawworks, the combination of a pair of spaced posts, a drum shaft supported by the posts, a drum mounted on the shaft, a brake rim secured to the drum, a brake band passed over thebrake rim, means for adjustably securing the dead end of said brake band, said means including .a bracket, means for securing the bracket in position, a collar mounted Within the bracket and adapted to be adjustably secured to the dead end of said brake band, and lock means pivotally secured to said bracket and adapted to engage said collar to lock the same in adjusted position. 7

3. In a device of the class described, the combination of a drum, a brake rim secured to the drum, a brake band passed over the brake rim, a bracket, a collar mounted within the bracket, and having an annular flange engaged within the bracket, means secured to the dead end of the brake band, said means being screw-threaded through said collar, and pivotally mounted means adapted to engage the collar to lock the said collar in adjusted position.

4. In a device of the class described, the combination of a drum, a brake rim secured to the drum, a brake band passed over the brake rim, a bracket, a collar mounted within the bracket to secure'the collar against movement in either direction, means secured to the dead end of the brake band and adjustably secured to said collar, and pivotally mounted means adapted to engage the collar and hold the same in adjusted position.

DAVID S. FAULKNER.

EDWARD 'llMBS.