USRE21297E - Depth recorder for a well dkul - Google Patents

Description

Dec. 12, 1939. P, LL Re. 21,297 DEPTH RECORDERFOR- A WELL DRILL Orizinal Filed July 5. 1935 3 Sheets-Sheet l amen tom GeaP. M izell G. P. MIZELL Dec. 12, 1939.

DEPTH RECORDER on A WELL DRILL Original Filed July 5, 19:55 3 Sheets-Sheet 2 MAM Dec. 12, 1939. G. P. MIZELL DEPTH R ECORDER FOR A WELL DRILL Original Filed July 5, 19:55 3 Sheets-Sheet a I 3mm Geo. PM izeH f6. MM

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UNITED j-s'r'A'rss PATENT OFFICE #233333 011811!!! No- 2,096,995, M ocflibet 26, 1937:

Serial No. 29.815, July 5, 1935. reissue October i, 1839,

5 Claims.

My invention relates to a device for recording the'speed of drilling and the weight simultaneously resting upon the drill as anindication of the type of formation through which the drill l is progressing. A I [t is apparent that if a, comparatively constant weight is rested upon the drill, the drill will progress at a comparatively constant rate unless the formation through which the drill is 16 penetrating varies. Hence by noting the weight resting upon the drill and the speedwith which the drill penetrates the formation I can deter-. mine the comparative hardness or penetrability 0f the formation being'drilled.

1' It is an object of the invention to provide a device which will show the speed of drilling and make a visual record thereof simultaneously with the production of an adjacent record showing the .weight resting upon the drill. thus ensmallsideeievationofthe view oi therecording'deqthe mechanism device recording the weight and speed' mounted within Application for (c1. ass-n I have shown my device as mounted in connection. with an ordinary derrick I having a derrick platform 2 at the lower end thereof upon which is supported the usual rotary drilling device I through which rotary motion is communi- 6' cated to the drive stem or kelley joint I;

At the upper end of the derrick I is the usual crown block 5 having a plurality of sheaves I thereon. Toward the lower end of the derrick and mounted between the supports thereof is a hoisting reel 1 through which the cable I is adapted to be handled in the drilling operation, Said cable passesover the sheave of the crown block and is then extended down at 8 around the traveling block II and then back up over the crown block sheave 6 and the dead line H is extended downwardly and attached to the derrick platform at if.

The traveling block It isadapted to support the'drill stem 4 and has a hook II thereon connected with the bail ll of the swivel II. This is of ordinary construction and need not beparticularly described."

Connected with the upper end Ii of the traveling block III is a line H, which is passed over guide means in the form of a pair of pulleys il and [ion the upper end of the derrick and extended downwardly around a pulley II secured to the upper'endof a weight 2| and from thence back up over a pulley 2! anddownwardly thru stop guides 23 and 24 into the housing of the recording device. I fix upon the line between the stop members 23 and 24 a block 26 which is adapted to engage with either of'the stop members 28 and 24 to limit the movement of the recording line. a r

The weight 2! is slidable upon a hollow guide member 21, which is extended from a point somewhat above the 1100: of the derrick downwardly to the derrick platform on which it is normally m supported. Both endseofthis tubular member are provided withv flanges II to limit the movement of the weight 2| and the weight 28' thereon, both said weights being ,slidable on the guide member. -The guide member itself is slidable 5 upon a rod or cable II, which is anchored at its lower end 8! in one of the sills oi the d errick and extends the full length of the derrick and its upper end is anchored'at t! in the crown block. withjhe dead line H is a weight 50 indicating 33 of ordinary constructionand which, as it formsho part of the present invention, a not specifically shown; Suiiice to say that theline II is passed between two stationaryendtlandlluponthehousing ss u of the weight indicator and is deflected around a movable post or plunger 36. Said plunger when depressed due to the weight upon the deadline will move the post or plunger l8 inwardly to actuate the-weight indicator through a fluid conducting line 3'! which extends below the derrick and into the housing where a hand 38 upon a. dial 3! is moved by the pressure of fluid in said line to indicate the amount of weight upon the cable. This is a common type of indicator, now well known.

' The recording line I] is shown in Figs. 3 and 4- as entering the upper end of the housing 25. Within the housing it passes over a pulley or sheave 40 mounted upon a shaft ll, rotatable in bearings 42 in the housing. From the pulley the line is passed downwardly and reeled about a drum 3.

The drum is is mounted upon a shaft 44 parallel with the shaft ll and journaled in bearings in the side wall of the housing at a level below the shaft 4!. Its end is extended through the wall of the housing and has on the outwardly extending end a drum 5 over which a line or cable 46 is wound, said line having a weight 41 depending downwardly from the drum or reel 45. It will be seen that this weight exerts a constant tension tending to rotate the shaft 44 and reel up a cable or line ii on the drum 4!, thus providing means for taking .up and paying out the line H after it leaves the pulley ll.

Mounted on the shaft ll within the housing is a beveled pinion ll, which engages a similar pinion 49 upon a threaded shaft ill. Said shaft is rotatable with the gear 49 within bearings ii on the wall of the housing, the lower end of the shaft being rotatable at 52 in a cross brace or support 58 in the frame of the housing. Mounted Y upon the threaded portion of the shaft II is a nut ll upon which is a laterally extending arm 54. Said arm has an opening therein to receive an upstanding guide post II, which is anchored in the cross brace 55 of the frame.

At the end of the arm is secured a rod I! at the lower end of which is secured a stylus I8, as seen in Fig. 4, which is adapted to bear against a sheet 59 upon a rotatable drum '0.

The drum III is fixed at the upperend of a vertical shaftti, which is supported in a cross brace 62 inthe housing and has at its lower end a gear 63. Said gear i3 is adapted to engage with gears 84 connected with a spring operated clock mechanism BI. It will be understood that by means of the clock mechanism the drumll is rotated at a uniform speed supported upon the upper end of a sleeve 8' through antifriction bearings 81 thereon.

The operation of the weight indicator in its ordlnary'manner will rotate the shaft '8 to which a the hand 38 is connected. To make a record of the weight upon the recording sheet 58 I place a pulley or pinion I on the outer end of the shaft BI and then mount a smaller pulley II on the wall of the housing so as to engage against a rod II and hold the same against the pulley'llin such manner that the rotation of the pulley will move the rod 1 I The rod Il may have rack teeth thereon to engage similar teeth on the pinion I to assure the proper movement of the rod by the record sheet 69 taken from the drum G0 is shown. At the upper side of this sheet is a chart marked with coordinates, indicating by spaced vertical record sheet are similar coordinates indicating.

weight upon the drill and the time that the drilling .progresses. These two charts are arranged one under the other so that they may be compared to indicate the natured of the formation being drilled as well as the rate of penetration as controlled by the weight on the drill.

When the new section of drill stem is introduced into the string of drill stem in the well the traveling block will be raised upwardly toward the upper part of the derrick to allow the introduction of the new section. when this is done the line H will be drawn upwardly by the reel-. ing up of the line H upon the drum 43 within the housing. This will raise the stylus or mark ing pin upwardly to the upper end of its movement indicated by the vertical lines on the upper chart in Fig. 7. When drilling then starts the pin will gradually travel downwardly along the chart as indicated by the line ii in Fig. 7. Simultaneously the amount of weight resting on the drill will be recorded by ,the line ii on the lower chart. With reference to the two lines it will be seen that the line IQ is comparatively constant, indicating thatthe weight resting on the drill varied but little. However, the drill did not progress downwardly at a uniform speed. At certain points it traveled faster than other and, as 'shown particularly at Tl, the line fiat- 7 seen that where the 'weight is not heavy upon'the bit, as indicated at 19, the speed of drilling is also not rapid, as shown at Ill. When the weight is increased, however, the speed of drilling also increases. By a comparison of these two graphs indicating speed of drilling and weight upon the bit a fairly good indication of the character of the formation being drilled may be seen.

In the handling of the drill stem where new sections in the drilling string have to be inserted the traveling block II may have to be lowered to the derrick platform during certain periods and an extra length of line must be provided, be-

cause the block 28 engages the stop 28 to prevent excessive movement of the stylus on the chart. Also, when the traveling block moves above its normal path of travel there will be some slack in the line because the block 26 engages the stop 24. The weight 41 will normallypreserve a taut condition of the line II and, in case a greater amo'unt'of line is desired, the weight II, together with the sleeve 21 and the lower weight II, will be elevatedabo've their normal position slidingalong the rod '30 when the block II engages the stop 23'. However, when the parts assume their normal position the weights will drop back to the positionshown in the drawings. Black in the line II, when the block 23 engages the stop 14, if the traveling block moves above its normal path, is taken up by the weight II which will slide down the sleeve 21 to maintain the line taut. The stop member 26 upon the line I1 is arranged to move through a distance between the stop members 23 and 24, which distance is only slightly in excess of the length of a section of drill stern. Thus when the block 26 engages with either of the stops the line can not move any .type of formation occur in the well and the degree of hardness of the formation may also be indicated. Some allowance may be made, of course, for the condition of the well drill which may be gradually dulled as the bit is used in drilling. The duller the bit becomes the slower of course will be the progress of the bit. The record, however, will be of value from a geological standpoint to indicate the nature of the formation,,the straightness of the hole and the condition of the drilling tool as well as the eflect oi the weight on the rate 0! penetration. The record is made automatically without attention by the driller so that he may take advantage of the information recorded and it seems obvious that various advantages will be obtained from the device other than those above set out.

What I claim asnewis:

1. In a rotary well drilling installation including a derrick and a traveling block suspended therein, the combination of a recording line connected with said block, a pulley at the upper end of said derrick over which said line is passed, a housing. a reel therein for said line, a rotating recording drum in said housing, a record sheet thereon, a pulley in said housing over whichsaid line is engaged to rotate said pulley. a shaft rotated by said pulley and. a stylus engaging said record sheet and actuated through the rotation said drill stem may be raised and lowered, the

combination of a recording line connected with 7 said traveling block, means to reel up said-recording line, a loop in said recording line, a

weight supported in said loop and acting to take up slack in said line but permitting the increase of the normal length of said line,- a stylus actuated by the movement of said line, a record sheet. to be engaged by said stylus, and means to move said sheet uniformly.

3.. In a rotary well drilling installation including a derrick and a traveling block suspended therein, the combination of a recording line connected with said block, a pulley at the upper end of said derrick over which said line is passed, a housing, a reel therein for said line, a pulley actuated by the movement of said line, a rotating recording drum in said housing, a record sheet thereon, a stylus actuated in response to the movement of said pulley to mark a record on said sheet of the speed of downward movement of said block, and means to limit the movement 01' said line.

4. In a rotary well drilling installation including a derrick and a traveling block supporting a drill stem suspended therein, the combination' of a recording line associated with said block for movement therewith, guide means supported by the derrick and over which said line is passed, a pulley over which said line is engaged to rotate said pulley, means for taking up and paying out the line after it leaves said pulley, a rotating record drum adjacent said pulley, a record sheet thereon, and a stylus actuated through the rotation of said pulley to move upon said sheet and record the downward movement of said drill stem.

5. In a rotary 'well drilling installation including a derrick and a travelingblock supporting a drill stem suspended therein, the combination of a recording line connected for movement with said block, a guide pulley supported by the derrick and over which said line is passed, a pulley .wheel over which said line is engaged to rotate said pulley wheel, means for taking up and paying out the recording line after it leaves the pulley wheel, a record drum adjacent said pulley wheel, a record sheet on the drum, a clock mechanism for rotating the drum, and a stylus actuated in response to the movement of said pulley wheel to mark a record on the sheet of the speed of downward movement of said drill stem.

GEORGE P. MIZELL.

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