US1402237A

US1402237A - Sand-reel drive

Info

Publication number: US1402237A
Application number: US427601A
Authority: US
Inventors: Harold J Lockhart
Original assignee: Parkersburg Rig and Reel Co
Current assignee: Parkersburg Rig and Reel Co
Priority date: 1920-12-01
Filing date: 1920-12-01
Publication date: 1922-01-03
Anticipated expiration: 1939-01-03

Description

H. J. LOCKHART.

SAND REEL DRIVE.

APPLICATION FILED DEC. 1, 1920 Patented Jan. 3, 1922.

2 $HEETS$HEET 1.

attozucq H. J. LOCKHART.

SAND REEL DRIVE.

APPLICATION FILED DEC-1,1920.

1,402,237, Patented Jan. 3, 11922 2 SHEETS-SHEET 2.

m am

cairn srars PATENT Fence.

HAROLD J'- LOCKHART, OF PARKERS BUBG, WEST VIRGINIA, ASSIGNOR TO THE -IPARKERSBURG RIG & REEL COMPANY, OF PARKERSBURG, WEST VIRGINIA,

A CORPORATION OF WEST VIRGINIA.

SAND-REEL DRIVE.

Specification of Letters Patent.

Patented Jan. 3, 1922..

Application filed December 1, 1920. Serial No. 427,601.

To all whom'it may conaeM:

Be it known that I, HAROLD J. LOCKHART,

' a citizen of the United States, residing at sprocket wheel loosely mounted Parkersburg, in the county of Wood and State of West Virginia, have invented certain new and useful, Improvements in Sand- Rieel Drives, of -which the following is a specification. f

This invention relates to sand reeldrives, and it comprises a main drive shaft, .a thereon, a clutch keyed to said shaft and adaptedto lock said sprocket wheel thereto, a sand reel shaft, a friction clutch having one element secured to said shaft, the other element being loosely mounted thereon, a sprocket wheel carried by said loosely mounted ele-' ment, a chain passing over said sprocket wheels, a brake engaging said first mentioned clutch element, and controlling means for said friction clutch and said brake whereby one of said members is renderedinoperative when the other is brought mtooperation.

In prior constructions, the sand reel shaft of a well rig has been driven from the band wheel on the main shaft by a friction drive. One end of the sand reel shaft is mounted in a bearing in a pivoted lever and this end of the shaft carries a pulley which is adapted to engage the periphery of' the band wheel to drive the sand reel shaft. Thls construction has several disadvantages. The

fixed member supporting the opposite end of the sand reel shaft is generally provided with a bearing having an enlarged o ening for the reception of the shaft, where y the shaft may accommodate itself to the various positions it must assume when the pivoted lever supporting one end of the shaft 1s moved. The construction is disadvantageous as the shaft is so mounted that considerable play is permitted and power lost.

In addition, the frictional engagement of the pulley on the end of the sand reel shaft with the band wheel, which is made of wood, causes uneven wear on the band wheel and eventually causesslipping of the drive belt which is arranged around the band wheel.

A frictional drive for the sand reel shaft is advantageous as a sand reel drive should be so arranged thatundue strain willnot'be imposed on the sand line in case the bailer tain any desired pull upon the sand reel line bychanging the force on the clutch lever to produce friction upon the friction clutch rings. The clutch lever must always be held in operativeposition with a certain amount of force to maintain the clutch element in engagement, and should the operator release the clutch lever, pressure on the friction rings'is. automatically released, thus relieving any undue strainupon the sand line.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a plan view of a portion of a well rig, showing the main shaft and the sand reel shaft,

Figure 2 is a vertical sectional view on line 22 of Figure 1,

Figure 3 is a side elevation of the construction shown in Figure 2,

Figure 4 is a detail view of the clutch and brake operating levers, and,

igure 5 is a transverse sectional view of a portion of the main drive shaft.

Referring to the drawings, the reference numeral 1 designates a suitable support or framework on which the rig is mounted. The band wheel 2 is mounted on main shaft 3, and is adapted to be driven from any suitablue source of power by a belt (not shown), in the usual manner. The main shaft is mounted in bearings 4, suitably supported from the framework and provided with braces 5. As shown, the band wheel is provided with an enlarged hub 6, over which passes ropes or belts 7 employed in operating other parts of the well rigging apparatus. A pair of sprocket wheels 8 and 9 are mounted on the main shaft. The latter is adapted to drive other parts Of the rigging apparaor its equivtlis through the provision of a chain (not shown). As the sand reel shaft is never iItoperation when any other part of the rig is being used, a single clutch 10 is employed to control the two sprocket wheels 8 and 9. This clutch is keyed to the shaft to revolve therewith, and it may be moved to the ex treme right or left to cause engagement of one of the sprocket wheels with the shaft, or

it may be retained in neutral position, shown in the drawings. The clutch is operated by a pivoted lever 11 secured thereto and pivoted on a bracket 12. The lower end of the lever is-secured to a, link 13 connected to one end of a control lever 14.

The sand reel shaft 15 is mounted in suitable bearings 16,- and provided with braces 17. When the sand reel shaft is to be used, the clutch 10 is moved to the extreme left, in Figure 5 of the drawings, in engagement with the sprocket wheel 8. As shown, a sand reel pulley 18 is mounted on the shaft, and is adapted to receive the sand line to which the bailer is attached. One element 19 of a clutch is fastened to the shaft, and is adapted to revolve therewith.

The clutch is of the friction type provided tion rings 21. T

with an engaging element 20 having frice movable element is carried by a collar 22, which is loosely mount ed on the sand reel shaft, and when the collar is moved toward the fixed element of the clutch, the rings are forced into engagement by means of ivoted levers 23 and links 24.

A sprocket w eel 25 is mounted on the col-- lar 22 and this sprocket wheel is driven from the sprocket 8 by'a chain 26. The friction clutch is controlled by a substantially Y-shaped pivoted member 27, which is secured to each side of the collar, as at 28, and pivoted at its lower end as at 29. A link 30 is connected to this Y-sha ed member intermediate its ends, and this ink is also connected to one arm 31 of a bell crank lever.- The bell crank lever is pivoted at 32 and provided with an arm 33; which is secured to the link 34. The link 34 extends backwardly beneath the main shaft and is connected to a Cpivoted link '35 having a link 36 connecte to its opposite end.

A brake band 37 is arranged around the fixed element 19 of the clutch. The ends of the brake band are secured to

links

38 and 39 respectively, the ends of the links being screw-threaded and provided with nuts 40 and 41 whereby the brake bandmay be adjusted. The link 38 is secured to an arm 42- of a bellcrank lever, and the link 39 is secured to the other arm 43. As shown, the arm 43 of the bell crank lever is conslderably longer than the arm 42, and when the lever is moved on its pivot, the end 44 of the brake band, which is secured to the link 39, is moved farther than the end 45,

thu l oseni g 0r tightening the band- The The operation of the device is as follows:

When the sand reel shaft is to be driven, the clutch 10 is engaged with sprocket wheel 8 to drive the collar 22 through sprocket wheel 25 and chain 26. The sand line descends by gravity in the usual manner, the weight of the bucket being suflicient to draw the line down into the well. During the descending of the bucket the friction clutch is disengaged, permittlng the sand reel shaft to run free. When the sand reelshaft is to be .drawn up, the friction clutch is engaged by moving the link 34 in the direction of the arrows in Figures 1 and 4 of the drawings. The bell crank lever 31, 33 is moved in the direction of the arrow, swinging the Y-shaped member 27 inwardly toward the fixed element 19 of the clutch through the provision of link 30 and causing the friction disks to engage. C

When the clutch is operated, the link 48 connecting the brake band is also moved -in the direction of the arrow, swinging the 44 tends to loosen the brake band, while the movement of the end 45 tightens the band. However, the end 44 moves several times as far as the end 45 so thatithe net result is to loosen the band and release the brake when the clutch is engaged.

When the levers are moved in the opposite direction to release the clutch, and the movement of the link 48 is reversed, theend 44 of the brake band is tightened, and the end 45 loosened, the net result being that the band is tightened and the brake applied.

-In the actual. use of the device, the brake band must be first adjusted so that it will engage the fixed element 19 of the clutch when the clutch is out of engagement and will be released when the clutch is engaged.

It will be observed that two separate and distinct modes are available for stopping the descent of the bailer. When the operator desires to stop the descent of the bailer, the link 36 may be moved in the proper direction to engage the brake band 37 and the fixed element 19 of the clutch, thus sto ping the revolution of the sand reel sha t 15. Should an of the brake mechanism become disengage or damaged, the operator may stop the descent of the bailer by moving the A pressure to overcome the force of gravity,- and thus check its descent entirely or to any" degree desired.

It will be apparent that by mean s of the present construction, I have provided'a sand reel drive wherein therpivoted sand reel -le-' ver supporting one end of the sand reel shaft is eliminated, and at the same time, all the advantages of a friction driveare retained.

It is to be understood that the form of my invention herewith shown and described 1s to be taken as a referred example of the same, and that various changes in the shape,

size, and arrangement of parts may be resorted to without departing from the spirit Vofthe invention, orthe scope of the submounted thereon, a brake band engaging.

saidfixedly mounted element, and common control means forsaid brake band and said clutch, said means comprising a reciprocat ing lever, a pivotally mounted lever secured thereto, a second pivotally mounted lever connected to "said first pivotally mounted lever, one end of said pivotally mounted lever being connected tothe loosely mounted element of said clutch, a brake operating lever connected to said first pivotally mounted band and said brake operating lever.

- 2. A sand reel drive, comprising a drive shaft, a sand reel shaft, means for driving said sand reel shaft from said drive shaft, said means comprising a friction clutch having one element fixedly mounted on said sand reelshaft and a second element loosely mounted thereon, a brake band engaging said fixedly mounted element, and common .lever, and connections between said brake control means for said brake band and said clutch, said means comprising a reciprocating lever, a bell crank lever secured thereto, a pivoted lever secured to the opposite end of said bell crank lever, the end of said pivoted lever being connected to the loosely mounted element of said clutch, a brake operating lever connected to said bell crank lever, a second bell crank le'ver connected to the end of said brake operating lever, and connections between the ends of said brake band and lever.

In testimony whereof I aflix my signature in presence of two. witnesses.

HAROLD J; LOOKHAORT.

the arms of said second bell crank Witnesses D. M. LONG, L; D. DUNsMoon.