US1755728A - Combination make-up cathead and friction hoist - Google Patents

Description

April 22,, 1930. "-1; 1 ,755,72s I 51 -0? CATHEAD MIDI-FRICTION HQIST -W. FOSTER IN VEN TOR.

wat-mam ATTORNEY.

April 22, 1930. 4 w. w. FOSTER 1,755,728

COMBINATION MAKE-UP CATHEAD AND FRICTION HOIST Filed May 23, 1927 2 Sheets-Sheet 2 WWW Z1). Faster-,

- INVENTOR.

' BY z A TTORNEY.

mum.

Patented Apr. 22, 1930 UNITED m E's PATENT. OFFICE WAIaTER W. FOSTER, OF WICHITA FALLS, TEXAS COMBINATION AKE-orcATnEAn AND FRICTION Hors'tr' Application filed May as, 1927. se iaino. 193,542.-

This invention relatesto rotary well drill-- 'ing equipment, and it refers more particularly to a combination'make-up cat head and friction hoist and'the principal object of the 5 invention resides in the provision, of a'novel improvement in friction hoists, associated with a cable assemblage, by which the manual labor usually necessary inmaking up a casing assembly is reduced to the very mini- Anotherobject of the invention resides in the provision of a Weight member so co-opcrating with the said friction hoist drum as to return the cable assembly to normal positionv up casing, and making "any horizontalpull or vertical lift of which the ordinary cat head is capable, yet without the dangers and cumbersomeness usually present in this method of operatingthe lines; A i

in view, the invention has particular reference to certain salient features of construction and operation of parts by which said objects are attained and which will become manifest as the description proceeds, taken inconnection with the accompanying drawings, wherein:

Figure 1 represents a perspective view'of a cat-head constructed according to the invention. 4- 7 Figure 2 is an axial cross-sectionalview of the cat-head, i I

Figure 3 is a fragmentary view of the K clutch mechanism and other related parts I Figure 1 is a fragmentary view of an ordi-r .5 crating with thecable assembly. v 7

With'these primary objects andadvanta'ges Figure 6 is an end view of' the weight, 7 and a Figure 7 represents a sectional view of the cableillustrating the manner of inserting a spider to establish a lug in'the length there- 'of Speedin making up and breaking out casing is of course the most important factor in present day drilling, and it has been found I that the'most expeditious way this can be accomplished is by winding a manila rope several times about a joint of casing and manually pulling the latter to spin the same into the preceding casingjjoint. Two or more workmen are required to setup casing in this manner and the work is very strenuous. The present invention proposes to accomplishina more expeditious manner mechanically that which has previously been done manually, with a considerable reduction in time and effort. 7

Continuing now more in detail with the drawings, reference is primarily made to Figures 1 to 3 inclusive, showing the preferred construction of drum or cat-head forming 7 a component part of the invention. Theinvention consists primarily of aflange 1, fixed by key 2 upon the draw works line shaft 3,

' which latter, as apparent in Figure 4 likewise carries the drilling drum 4, the latter however being apart from the invention. Surrounding the flange bushing 5 is a bushing 6 of bronze or an equivalent materlal, and surrounding this is a bushing 7 integral with the cam 8, and bracket9 which latter is bolted at@ to the draw works post 10, supporting one end of the shaft 3. The shaft 3 is constantly rotating during the operatlon of setting'upcasing, and since the flange 1 1s fixed thereto italso is constantly in motion while the elements of the drum consisting of the bracket bushing 7, cam 8 and outer shell 11 are freely mounted upon the flange bushing 5 and not rotated except when thrown into frictional engagement with the flange 1, 9 aswill be presently described. The intermediate bronze bushing 6 is adapted to minimize friction between the flange bushing and stationary bracket bushing 7 and prevent freez-' (lo-operating with the cam 8 is another cam 12, constructed to conform in the manner illustrated in Figure 3 and has attached thereto a lever 13, actuation of which causes the outer shell to move outward or toward the end of the shaft 3, whereby frictional contact will be made by the flange of the outer if latter by said cam 12 when the same is operated by the lever 13 to urge the shell 11 outward as described above.

- outer shell 11 when friction of the clutch 14:

is relieved, consists of anarm 17, pivotally supporting at its either end a brake shoe 18, each of which are frictionally engageable with an annular surface I) on each flange of the outer shell 11. The arm 17 has protruding therefrom an integral lever 19, pivotally supported at a central position by an arm 20 affixed to the bracket 9 011 the post 10 and to the free end of the lever 19 is attached a rod 21 depending to the derrick floor 22 at which point it is attached to a foot pedal 23. The rod is provided with a joint 2% to enable it to be adjusted as to length.

An upward pull upon the lever 13 will obviously urge the outer shell 11 of the drum outward into frictional engagement with the clutch surface 14; aflixed to the flange 1, by

V reason of the co-operative action of the cams 12 and 8, and the outer shell 11 being otherwise fr-ee to rotate is carried around .by the.

constantly rotating flange .1 affixed to the shaft 3. The cable 25 wound aboutthe outer shell 11 is operated thereby as will be presently described. Upon release of the lever 13, the outer shell 11 will recede from its frictional contact-with the clutch band 14 to be independent, and at this time, the pedal 23 is depressed to bring the brake shoes 18 into engagement with the surface Z) of the outer shell 11 to control the latter and to hold I the cable in the position to which it has been move-d, unless, of course, strain on he cable hasbeen relieved.

A fragmentary representation of a derrick is shown in Figure 4, showing also a partial View of the draw works, in which the usual cat head is supplemented by the friction hoist embodying theinvention, upon the end a weight member 26, illustrated in detail in Figures 5 and 6, and shown in operative position in Figure 4.

It will be noted that a lug is applied to the cable 25 at a suitable position in its length, in the manner shown in Figure 7, which consists in placing a spider 27 between the strands of the cable 25, sliding the cone 28 thereover and pouring babbitt therein to firmly weld the same to the cable. The weight member 26 is constructed with protruding arms 29 in which opposing recesses are provided to conformably receive the cone member 28, and a similar member 30, applied to the end of a rope 31 is received in the other recess. The recesses in which these members 28 and 30 are received are slotted ate as shown in Figure 5 so as to enable the cables to be released therefrom with a minimum of effort by simply unseating the members and drawing the cables through the slots 0.

Acting as a supporting means and guide for the weight member 26 is a cable 32, secured to the derrick leg at a suitable distance above the floor, and having its other end attached to an eye 33 integral with a bracket 34 aflixed by U clamps 35 also to the derrick leg. A sheave 36 is carried by the bracket 34, and the position of the latter directs'the sheave toward the rotary table 37 the point ofjoperation.

In order to better accomplish horizontal pulls in more than one direction, the brackets 34 is provided with a hinged connection with the U clamp 35 surrounding the derrick leg,

enablingit to be swung to various angles with respect to its support. 7

The rope 31 is, as stated previously, connected to :the Weight member 26 and passing about the sheave 36, is wound a number of times about the casing section 38.

In practical operation the parts ofthe invention are arranged in the manner illus-' trated in Figure 4. An end of the cable 25 suitably affixed to the outer shell 11 of the assembly and wound about the same a number of times, is directed upwardly through guide sheave 28 and over the conventional crown block and downwardly to the derrick floor. Usually a greateramount of this cable is employed than is necessary in spinning in casing sections in making up an assembly, but by applying a hook 39 on the end of the cabi: it makes a very efficient and practical hoisting apparatus for bringing in heavy and unwieldy objects from the'yard, the feature of frictional control andready braking facilities of the drum playing a very important part in the performance of the invention in this regard. M

Gn the other hand, in adapting the invention in setting up a casing assembly, the cone shaped melnber 28, aflixed on the cable 25 is mounted in the upper recess in the member 26, and the rope 31 wound a few times about the casing section held in readiness for spinning in. The lever 13 of the drum is pulled upwardly by an attendant, while another operator holds the free end of the rope 31. Operation of the lever urges the outer shell 11 of the drum outward to eifect rotation of the latter, consequently winding up the cable, pulling the weight member 26 upward along the guide cable 32, and spinning the section of casing 38 into the joint 40.

It is necessary only to release the lever 13 to permit free movement of the outershell 11 of the assembly to again lower the cable to operative position, since the weight member 26 is constructed as to be sufliciently heavy as to unwind the cable from the drum when released from the friction engagement with the driving flange 1. Downward movement of the weight member 26 is'controlled by the brake shoes 18 controlled in turn by the foot pedal 23. V

Manifestly, the construction shown is capable of considerable modification and such modification as is in keeping with the apcontact with both flanges of said shell member to arrest its rotative motion upon release of the frictional engagement between said flanged member and outer shell.

pended claims is also considered within the V I spirit of the invention. I

What is claimed is: Y

1. In a combination make-up cat-head and friction hoist including in combination with a rotating shaft, the same comprising a member fixed to the shaft to rotate therewith and having a flange, an outer shell freely mounted on said fixed member having flanges,

one of which is arranged .for frictional engagement with the flange of said fixed member; means to actuate said outer shell to effect such frictional engagement, and means capable of being brought into "frictional engagement with the inner surfaces of said with either flange of said outershell to arrest its rotation upon release of said shell actuat ing means,

3. In acombination make up cat-head and friction hoist; a flanged member" fixed on a rotating shaft, and 'an outer shell member freely mounted on said flanged member, and

capable of movement longitudinally on said latter member as to bring one of its flanges into frictional engagement with the flange of said flanged member to cause said outer shell to move with said flanged member and shaft, means to effect such movement and means capable of movement into frictional

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