Патент USA US2124129код для вставки
july 19, l938., H. |_. THEROLF 2,124,129 JOINT BREAKER Filed June 5D, 1936 \ è ` 6? ¿i 60600 22 6/ A 99 ».32 ¿aq 2? J 53 42 Ä y 52 ¿ 60 63" 62 l ß g « / v ,E l ' l \ l 24 54 74745 Í65 , Z, P2 45 i \` .. „ . _ .i5] Patented July i9, 193s ' STT És PAT E T 2,l24,129 FFEQE 2,124,129 JOINT BREAKER Harold L. Therolf, Los Nietos, Calif., assigner to Eason & Therolf Tool Company, Los Nietos, Calif., a cla-partnership composed of Ernest L. Eason and Harold L. rl‘herolf Application June 30, 1936, Serial No. 88,123 ’7 Claims. (Cl. 254--1‘73) This invention relates to well drilling equip- tion of a typical draw works illustrating the joint ment and relates more particularly to an automatic cat head or joint breaker for use on or ap~ l plication to the draw works of a well drilling rig. 5> A general object of this invention is to provide a practical, effective automatic joint breaker'that is safe and convenient to operate. Another object of this invention is to provide an automatic joint breaker intended for applical10 tion to the line shaft of a draw works that may be governed or engaged from a remote point to 15 20 breaker of the present invention in its operative position. Fig. 2 is an enlarged vertical detailed sectional View of the joint breaker being a view taken as indicated by line 2_2 on Fig, l. Fig. 3 » is a longitudinal detailed sectional View of the joint breaker taken as indicated by line 3-3 on Fig. 2. Fig. 4 is a fragmentary transverse detailed sectional view taken substantially as indicated by line 4_4 on Fig. 3 and illustrating the clutch 10 means and Fig. 5 is a fragmentary horizontal de exert a pull on tongs or the like for breaking a joint in a drilling string, or the like, at the ro- tailed sectional View taken substantially as in dicated byline 5-5 on Fig. 4. a pull of limited and known extent and then releases, whereby it is particularly safe to use or operate. the drawing I have illustrated a portion of a '5571310211 GMW WOTkS aS Used íIl Well drilling Opel” tary table. Another object of this invention is to provide an automatic joint breaker that exerts or applies Another object of this invention is to provide an automatic joint breaker of the character mentíoned in which the moving or working parts are entirely enclosed and cannot foul the lines or injure the workmen. 25 Another object of this invention isl’to provide an automatic joint breaker of the character men- The improved joint breaker of the present in vention is adapted to be employed in connection là with draw works of various makes and types. In ations and have shown a typical preferred-em bodiment of the invention operatively applied to 20 the draw works. It is to be understood that the invention is not to be construed as limited or re stricted to the specific form or application about to be described, but is to be taken as including any features or modifications that may fall Within the 25 scope of the claims. tioned that embodies a simple, dependable clutch The lJOftìOYl Of the typîßal dl‘â'W WOrkS illus and a clutch control operable from a convenient trated includes a frame having a header l0 and remote point to engage the tong-line drum with «30 the line shaft of the draw works. Another object of this invention is to provide an automatic joint breaker of the character mentioned embodying a novel effective means for automatically disengaging or de-clutching the 35 tong-line drum when the drum has been turned substantially one revolution thereby rendering the device safe to operate under practically any conditions. Another and important Object 0f the inven4o tion is to provide an automatic joint breaker of the character mentioned that may be easily and quickly assemmed in the une Shaft even though the Shaft wobbles @pis out of alignment A further object of this invention is to provide 45 an automatic joint breaker of the character mentioned that is simple and inexpensive and that is adapted to be applied to the line shafts of the various typical makes and forms of draw works, a post l l. A substantially horizontal line shaft I2 is rotatably supported by ‘bearings (not shown) and has an end portion @Xtendîng laterally from 011€ Side 0f the POSE H. A drum Shaft i3 is spaced below the line shaft l2 and is rotatably carried by a bearing M'On the post Il and a sim ilar bearing on the other post (not shown) of the frame. The drum shaft I3 carries the usual Winding drum I5. The DOI‘ÈÍOD 0f the drum t5 illustrated has a brake flange I6 engageable by the usual lined brake band ll for controlling the rotation of the Winding drum- A chain and SDTOCket drive I3 íS DTOVíded between the line shaft l2 and the drum shaft i3. It is to be under stood that the line shaft I2 is driven or operated by the drlïlîïlg .engine 0f the Iig. The alltOmatlC 3011115 breaker 0f the Present ÍIIvolition inoludes, generally, a CaSe or housing 20 surrounding tho ond portion of the lino Shaft l2, a sleeve or collar 2| secured to the shaft l2 with The various objects and features of my inven- in the hOUSîng 29. a Cat head 01' SDOOI 22 0n the 50 tion will be fully understood from the following detailed description of a typical preferred form and application of my invention, throughout which description reference is made to the accompanying drawing, in which: 55 Fig. lis a fragmentary elevation view of a por- 30 A" 35 '4o 45 collar 2l, a shíftable tong-line drum 23 in the 50 housing 2U, Cllltßh means 24 adapted to form a dríV‘â betWeSn the C0115? 2l and the drum 23, means 25 for shifting the drum 23 to engage the clutch means 24 and means 2B for automatically returning the drum 23 to disengage the clutch 55 2 2,124,129 means 24 at the termination of substantially one revolution of the drum 23 The case or housing 23 is provided to enclose the moving or working parts of the device to pre vent the fouling of lines, etc. with the device, and to protect the workmen against injury. The housing 20 is relatively stationary vand is rotat ably mounted on the projecting portion of the shaft I2 in the manner to be hereinafter de 10 scribed. In the typical form of the invention illustrated the housing 20 is a substantially cy lindrical hollow structure comprising two com plementary sections 23a connected by axially ex tending flange and bolt connections 21. The housing 2t! is provided with normal inner and outer ends 28 and 29. A radial inwardly facing annular flange Síl is provided on the interior of the inner end 28. An outwardly projecting wall Section extends from the outer end 23 of 20 the housing 2B and has an angular rlip or flange 32 at its outer end. Means is provided for pre venting rotation of the housing 23. A stop lug 33 projects from the upper section 25a and is adapted to abut or bear against a convenient 25 or suitable abutment to hold the housing against turning in one direction. In the particular appli cation of the invention illustrated in the ydraw ing the post II forms the abutment for the lug 33; that is, the lug 33 abuts against the station 30 ary abutment or post I I to prevent rotation of the housing 29 with the shaft l2. A bolt Sil passes through an opening Si in the lug 33 with substantial clearance. 'I‘he bolt 93 has a shoulder 92 engaging against the post II to prevent the 35 head of the bolt from clamping the lug against the post. A reduced portion of the bolt 99 passes through an opening in the post l I, or a flange of the post II, and has a threaded nut 93 to hold the bolt in place. The lug 33 is only loosely en gaged on the bolt 90 and does not serve to secure the housing 23 to the post but merely holds the housing against rotation in both directions. The loose association of the housing 2U with the abut ment or post I I is important as it allows the joint 45 breaker to be easily and quickly arranged on the shaft I2 even though the shaft is out of align ment. It is apparent that the lug 33 or another part of the housing 20 may engage any suitable stationary abutment to hold the housing against 50 rotation with the shaft I2. The housing 23 just described surrounds the end portion of the line shaft I2 with substantial clearance to receive the collar 2i, the drum 23 and the associated parts. The collar 2l is provided to shiftably support 55 the line drum 23 and to present certain clutch parts of the means 24 to be hereinafter described. The collar 2I is a tubular member of substan tial length surrounding the shaft I2 at one side of the post II and extending through the hous In practice the collar 2l may project outwardly beyond the end of the shaft I2 as illustrated in the drawing. A feather or key 34 cooperates With suitable key-ways 35 in the shaft 60 ing 2G. I2 and the collar 2l to connect the collar with 65 the shaft for rotation therewith. The major por tion of the collar 2l is cylindrical and of uni form diameter. The inner end portion of the collar 2I is preferably of enlarged diameter and is provided with an annular groove 33. The 70 housing 20 surrounds a portion of the rotatable shaft I2 and is held against rotation with the shaft by the engagement of its lug 33 with the abutment or post II so that it is desirable or necessary to provide bearing means for support 75 ing the non-rotatable housing on the rotatable shaft. A bushing or bearing 31 is arranged in the groove 3G and receives the flange 30 of the housing 20. 'I‘he housing 2D is thus rotatably supported on the shaft I2 through the medium of the flange 30, bearing 31 and collar 2|. Suit able lubricant ports 38 are provided in the bear ing 31. A lubricant reservoir 39 may be provided on the upper portion of the housing 20 and a port 40 may extend downwardly through the housing 2G from the reservoir 39 to the flange 33 to con -duct lubricant to the bearing 31. An annular flange 4I is provided on the collar 2l at the outer side of the groove 33 to carry certain clutch parts of the means 24 as will be hereinafter described. The cat head or spool 22 is provided to replace 15 the cat head usually provided on the end of the line shaft I2 and >has the same uses as the usual cat head. The spool 22 is secured to the project ing end portion of the collar 2| to rotate with the shaft I2. The spool 22 is cylindrical in its 20 general configuration and has annular flanges 42 at its opposite ends to» prevent the displace ment of the line. The spool 22 is preferably made hollow to lighten its Weight and reduce its cost. In practice the spool 22 may be tubular and its 25 outer end may be closed by a plate 43 secured in place by a spring ring 44. The cat head or spool 22 is threaded on the projecting end portion of the collar 2| and is locked against unthreading by a feather or key 45. The inner flange 42 of the 30 spool 22 is received in the angular flange 32 of the housing 2li and the inner end of the spool acts to close the outer end of the housing. The drum 23 is provided to- pull or operate a line L which in turn may pull or operate tongs or 35 other tools in the rig. The drum 23 is arranged in the housing 2li and is shiftable axially therein. In accordance with the invention the drum 23 is a tubular member surrounding the major cy lindrical portion of the collar 2I. The drum 23 40 is preferably rotatably and shiftably supported on the collar 2I through a suitable bearing or bushing 46. The bushing 46 may be shiftable with the drum 23. An annular internal groove 41 is provided in the drum 23 to carry lubricant for the bushing 46. A port 48 extends outwardly 45 through the drum 23 to conduct lubricant to the groove 41. An annular external channel or groove 49 is provided in the drum 23 to receive or wind in the line L. An opening 98 is provided in the wall of the housing 20 to facilitate the lu 50 brication of the bushing 46 and is normally closed by a door 99. An end of the line L is secured to the drum 23. In accordance with the invention any suit 55 able means. may be provided for securing the line L to the drum 23. In the particular structure illustrated a tubular rope socket 5U is fixed in the groove 49 to receive the line L, The inner end part 5I of the line L is spread or enlarged to 60 prevent the line from- being pulled outwardly through the socket 50. The line L extends from the joint breaker and is adapted to be connected with a tool, for example, tongs, for breaking the joints of a string extending through the rotary. An opening 52 is provided in the lower wall por tion of the housing 25 in alignment with the groove 49 to pass the line L. is horizontally elongated. The opening 52 A tangential tubular guide 53 may be provided on the body 20 at the 70 opening 5G to guide the line L, The clutch means 24 is operable to impart ro tation from the collar 2I to the drum 23 for the purpose of winding the line L on the drum and thus effect pulling of the line L and operating 75 ya 2,124,129 of the tool connected therewith. The clutch means 24 includes a plurality of circumferen tially spaced clutch parts 54 on the inner end of the drum 23; The clutch parts 54 have flat radial faces 55 opposing the direction of rotation of the shaft I 2 and inclined surfaces 55 sloping away from the tops or extremities of the surfaces 55. The means 24 further includes clutch parts on the flange 4l of the collar 2l. The clutch 150 parts on the ñange ¿il comprise flat radial faces 5l facing in the direction of rotation of the shaft l2 and inclined surfaces 58 sloping away from the tops of the faces 5l. The faces 5l and the surfaces 58 may constitute walls of spaced'notches 15 in the outer side of the flange 4I. These notches are adapted to receive the clutch parts 54 with suitable clearance. Upon inward shifting of the drum 23 the inclined surfaces 56 and 58 are adapted to cooperate to provide for smooth mesh ing or engagement of the clutch parts. The faces 51 are adapted to cooperate with the faces 55 to transmit rotation from the collar 2| to the drum 23. The means 25 is adapted to be operated from 25 any suitable remote point to effect axial shifting of the drum 23 to engage the clutch means 24 described above. The means 25 includes a lever or bell crank pivoted on a pin 6B supported by spaced lugs 6l on the upper side of the housing The bell crank has an arm 62 projecting downwardly or inwardly through an opening 63a in the wall of the housing 2i! and an outwardly and axially projecting arm 63. An annular groove 64 is provided in the outer end portion of 35 the drum 23 and a cup-like member 65 seats in 30 2i). the upper portion of the groove 64. The mem ber 65 also bears on the cylindrical periphery of the drum 23. The inner end of the arm i572 is rounded to cooperate with or seat in the member 40 65. The means 25 may further include a line 55 connected with the outer bell crank arm 63. The line EG extends from the arm 53 and may pass over suitable pulleys 6l on the header IS to a 45 convenient lpoint for actuation. Pulling of the line 66 effects inward swinging of the arm @2 which in turn shifts the member G5 and the drum 23 inwardly to engage the clutch means 24. Spring means may be associated with the means 50, 25 to yieldingly hold the drinn 23 in its de~ clutched position. In the particular case illus trated in the drawing an extensible coiled spring 68 is connected with the arm 63 and a lug 5i to urge the arm 63 to the position where the drum 5.5. 23 is idle. The means 26 for automatically de-clutching the drum 23 from the collar 2i and the shaft l2 is an important feature of the invention as it renders the device entirely safe to operate. The means 2S is a simple cam means that automati cally shifts the drum 23 axially outward at the termination of substantially one complete rota~ tion of the drum. The automatic de-clutching means 26 includes a lug 'lll projecting inwardly 65 from the upper wall portion of the housing 20 and a cam 'H on the inner end of the drum 23. The projection T0 may have substantially flat parallel sides as illustrated in the drawing. The cam 'Il has a fiat end surface 'l2 facing counter to the 70 direction of rotation of the shaft l2 and an in clined or pitched surface 13 on its forward side. The cam face 13 is of substantial length and is adapted to cooperate with the lug 'lil to shift the drum 23 axially or outwardly a sufficient distance 75 to disengage the clutch parts 54 from the clutch parts of the flange 4l. A fiat axial face Iûll'is provided at the outer end of the cam face 73. The projection or lug 'Hl- and the cam `-H are related so that when the flat face î2‘of the cam is in cooperation with the lug ‘l0 the rope socket 5@ is adjacent to and in alignment with the open' ing 52 as illustrated in Fig. 2. It is believed that the operation of the auto matic joint breaker of the invention will be ap parent from the foregoing detailed description. The line L is adapted to be connected with tongs or any other similar tool in the drilling- rig. The shaft l2 may be constantly rotating and the spring 68 holds the drum 23 in its retracted posi# tion where the clutch parts 54’are out of engage '115 ment with the clutch parts» on the flange' 4l. When the drum‘23 is in this normal positionthe flat face 'l2 of the cam ll is in engagement .with the lug 110. When it is desired to operate the tongs or tool connected with the line L the oper~ ator pulls the line 56 to shift the drum 23 in wardly. As the drum 23 shifts inwardly the in clined surfaces 56 and 58 may come into engage ment to facilitate the smooth engagement of the fiat clutch faces 55 with the faces 51. Whenv the faces 55 and 5l are in cooperation the drum 23 of course rotates with the collar 2| and the shaft l2. As the drum 23 rotates the line L is. wound or wrapped into the groove 49A and is thus actu ated or pulled to operate its tongs. The rotation or turning of the drum 23 continues until the cam 'il cooperates with the lug lil. The cam face 'f3 cooperates with the lug 'l0 to shift the drum 23 axially or outwardly. As above described the surface 3 is formed to shift the drum 23 out 20 25 35 wardly to fully disengage the clutch parts 54 from the clutch parts on the flange 4I. This, of course, completely de-clutches the drum 23y from the collar 2i and the shaft l2. The face |08 definitely limits the movement of the drum 23. Thus the joint breaker is operable to exert a lim ited or definite pull on the line L and no more, so that there is no danger in the operation of the tongs or tool. To recondition the device'for a succeeding operation the line L is pulled out-y 45 wardly to effect reverse rotation of the drum 23. The ñat face 'l2 of the cam ‘il is adapted to strike the lug 'It to‘limit this reverse rotation of the drum 23 and set the drum in position for a sec ond operation. The spring 68 acts to yieldingly 50 hold the drum 23 in its (ie-clutched position and to automatically return the line 66. ' The automatic joint breaker of the present invention is entirely safe to operate and is adapt ed to give tongs or similar tools a definite and 55 known pull or stroke of movement. The operat ing parts of the device are entirely enclosed against dirt and so that they cannot foul the lines or injure the workmen. The joint breaker is such that it may be easily and quickly assembled on the line shaft of a typical draw works with little or no alteration of the draw works struc ture. The device is simple and easy to operate and is inexpensive to manufacture. Having described only a typical preferred form 65 and application of my invention, I do not wish to be limited or restricted to the specific details herein set forth, but wish to reserve to myself any variations or modifications that may appear to those skilled in the art or fall within the scope of 70 the following claims. Having described my invention, I claim: l. A joint breaker for application to the shaft of a draw works having a post, said joint breaker including, a housing surrounding the shaft, a 75 4 2,124,129 member arranged on the shaft to rotatethere with and extending into the housing, means ro tatably supporting the housing on the member, a rotatable and axially shiftable drum arranged on the member, a tool operating line associated with the drum to be wound thereon, clutch means en gageable by axial shifting of the drum in one di rection to cause the drum to rotate with the shaft, means for shifting the drum in said direc .10 tion to engage the clutch means, cam parts on the drum and housing cooperable to shift the drum in the opposite direction to disengage the clutch means when a >predetermined length of the line is wound on the drum, and means loosely 15 associating the housing with the post to prevent rotation of the housing. ’ 2. A joint breaker for application to the shaft of a draw works including, a housing surrounding the shaft, a member in the housing arranged on 20 the shaft to rotate therewith, a bearingY rotatably supporting the housing on the member, a rotat able and axially shiftable drum arranged around the member, a tool operating line associated with the drum to be wound thereon, clutch means en~~ gageable by axial shifting of the drum in one di rection to cause the drum to rotate with the shaft, means for shifting the drum in said direc tion to engage the clutch means, cam parts on the drum and housing cooperable to shift the drum in the opposite direction to disengage the clutch means when a predetermined length of the line is wound on the drum, and means loosely associating the housing with a relatively fixed abutment to prevent rotation of the housing. 3. A cat head for use in combination with a rotatable shaft and a relatively stationary abut nient, the cathead including a collar .secured to the shaft to rotate therewith, a rotatable line drum shiftable axially with respect to the shaft, clutch parts on the collar and drum cooperable upon shifting of the drum in one direction to effect rotation of the drum, means for shifting the drum in said direction to eifect engagement of the clutch parts, a. housing surrounding the 45 drum, bearing means supporting the housing on the collar, cooperable parts on the drum and housing for shifting the drum in the other direc tion to effect disengagement of the clutch parts, and a stop part on the housing engaging against 50 the abutment to prevent turning of the housing and shiftable relative to the abutment to allow lateral working of the housing with the shaft. 4. A cat head for use in combination with a rotatable shaft and a relatively stationary abut 55 ment, the cathead including a collar secured to the shaft to rotate therewith, a rotatable line drum shiftable axially with respect to -the shaft, clutch parts on the collar and drum cooperable upon shifting of the drum in one direction to 60 effect rotation of the drum, means for shifting the drum in said direction to effect engagement of the clutch parts, a housing surrounding the drinn, bearing means spaced axially of the shaft for supporting the housing on the collar, cooper able parts on the drum and housing for shifting the drum in the other direction to effect disen gagement of the clutch parts,y and a stop part on the housing engaging with the abutment to prevent turning of vthe housing and shiftable relative to the abutment to allow lateral working of the housing with the shaft. 10 5. In combination with a rotatable shaft and a stationary abutment, two elements, one a mem ber rotatable with the shaft, the other a rotatable drum, one of said elements being shiftable axially of the shaft relative to the other, clutch parts on 15 the elements cooperable to effect rotation of the drum with the shaft upon axial shifting of said shiftable element in one direction, a housing for said elements, means rotatably supporting the housing on the member, means loosely associat 20 ing the housing with said abutment to prevent turning of the housing and to allow lateral work ing of the housing, means for shifting said shift able element in the direction to engage the clutch parts, and cooperable cam parts on the housing 25 and said axially shiftable element to shift said shiftable element in the other direction to effect disengagement of the clutch parts. 6. A cat head for use in combination with a rotatable shaft and a relatively stationary abut 30 ment, the cat head including a collar secured to the shaft to rotate therewith, a rotatable line drum shiftable axially with respect to the shaft, clutch parts on the collar and drum cooperable to effect rotation of the drum, a housing for the 35 drum rotatably supported on the collar, means for shifting the drum to engage the clutch parts, cooperable parts on the housing and drum for shifting the drum to disengage the clutch parts, a projection on the abutment, and a part on the housing engaging against the abutment and hav 40 ing an opening loosely receiving said projection to prevent rotation of the housing and to allow lat eral working of the housing with the shaft. '7. A cat head for use with a shaft and a post, the oat head including an assembly comprising a 45 collar adapted to be slid over the shaft, a drum carried by the collar to rotate and shift axially thereon, a housing, and bearing means rotatably supporting the housing on the collar to surround the drum, means for securing the collar to the 50 shaft to rotate therewith, cooperable clutch parts on the collar and drum to leffect rotation of the drum, means for shifting the drum to engage the clutch parts, cooperable parts on the drum and housing for shifting the drum to release the 55 clutch parts, and a stop on the housing engaging the post to prevent rotation of the shaft and shiftable with respect to the post to allow lateral working of the housing. HAROLD L. 'I'I-IEROLF.