US1663096A - Core drill - Google Patents

Description

March 20, 1928. v 1,663,096

* J. T. PHIPPS CORE DRILL Filed March 11, 1925 2 Sheets-Sheet 1 (Za T 1,663,096 J. T. PHIPPS CORE DRILL 6 Filed March 11, 1925 2 Sheets-Sheet 2 Mr h 20, 1928.

| l I I 1 I I l I l l l v l '16 l I J65 w J56 Patented Mar. 20. 1928.

UNITE s'r Te JOHN T. PHIIPIS, OF H'ONTINGTON PARK, CALIFORNIA, ASSIGN'OB TO E C. SMITH MANUFACTURING COMPANY, OF WHIT'IIER, CALIFORNIA, A CORPORATION OF" CALIFORNIA.

' CORE DRILL.

Application filed March 11, 1925. Serial No. 14,688.

I This invention relates to core drills for taking cores of formations to be drilled for oil, water and other wells, which cores are taken so that the log of the well may accurately' reflect the formations through which the well is produced. The invention has for its object to provide an improved core drill which, together with the core-receiving tube, may readily be assembled with or applied to a, tubular drill stem and its -collar, and the parts and features of which a are so constructedgformed and applied that substitution of fresh parts orv dressed drill members may readily be made, and the core- 1 receiving tube with its core may readily be removed from the drill stem for removal of the core. I The invent-ion has for further objects the provision of an improved core'drill construction and organization which will be superior in point of simplicity and inexpensiveness, takexrtogether with durability, facility in use,- adjustment, replacement, repair and dressing of the cutting portions, and positiveness, efiiciency and speed in use and operation. e. a 7 'With the above and other objects in view,

the invention consists in the novel and useful provision, formation, construction, combination, association and relative arrange ment of parts, members and features, all as ereina'fter described, shown in the drawing and finally pointed out in claims. In the drawin s:

Figure 1 is a ragmentary tional side elevation of a drill stem and corerceiving .tube assembled, with core drill features constructed and organized to embody the inyvention in one form; I Figure. 2 is an enlarged bottom plan view of the drill shown in Fig. 1. v Figure 3 is a verticaltransverse sectional view taken upon the line 3.3, Fig. 2;

Figure 4 is asimilar view taken upon the line 4..4,'Fig l Figure 5 is an'enlarged side elevation of the lower portion of the construction shown in Figure 1; V

Fi ure 6-is a perspective view of a core f tube ushing shown inthe other figures;

and partly sec-' 10, said cutters each Figure 7 is a perspective view of a core breaker shown in the other views;

Figure 8 is a bottom plan view of a core cutter shown in the other figures; and,

Figure 9 is a side elevation ofsuch core cutter as shown, in Figure 8.

Figures 2 to 9 inclusive are drawn to the same scale. 1

Corresponding parts in all the figures are designated by the same reference characters. Referring particularl' to the drawings, I have shown at A a dril stem provided with a male member a of a tapered threaded tool joint, whereby such drill stem maybe connected with a string of drill tools or'drill tubing. a I

This tubulardrill stem is provided at the lower end with a drill collar 10, preferably produced by enlarging the drill tube, and

this jdr-ill collar is vertically slotted, there being preferably three. such slots formed, as

at 11, for the initial rece tion of anannular bushing 12 provided Wlth a plurality of radial external heads or bosses 13 respectively receivedby and within the slots '11, so that the bushing 12 fits] up within the drill collar 10, and, being shouldered as at 13 and. threaded internally above such shoulder, as at 13", receives in threaded union the lowerend portion of the core tube B, which is first passed upwardly. within the drill stem, prior to introduction of the bushing 12, as mentioned. The core breaker C" is annular in form and rovided with a lurality of inwardly an upwardly inclined core breaking teeth14, which may be producedby punching the metal ofthe annulus C inwardly, and this annulus or breaker rin G is positioned within the drill collar 10 be neath the bushing 12 and brought into position to abut against the same, such breaker annulus being of slightly larger internal di-. ameter than the internal diameter of the lower-portion of the bushing 12, which lower portion is slightly diminished to produce a downwardly tapering bore for the retention of the core at its lower end.

The cutters D are then inserted upwardly into the lower portion of the tubing collar having a segmental body 00 a transverse cutting edge portion 16" at its lower extremity extending to the inner periphery of the body 15. Dovetail heads. 16

are held in dovetail recesses 16 in the collar 10, at abuttin ends of the segmental bodies 15, firmly ho din-g the cutters D in place. The lower edge of each such cutter sectlon is provided with a plurality of cutting teeth having transverse cutting edges 16 which are arranged in a series in the arc of a circle having the same generating center as the arc in which lie the cutting edges 16", the largest are described "by the cutting edges 16 having a lesser radius than the are described b the'outer cutting portions of the edge16. 'Rhese cutting edges 16 thus constitute lower terminal portions of the segment 15. All

of the cutting edges 16"v and 16 lie in the same plane transversely of the segment 15.

, The drill stem is provided with a circular passage 17, preferably coaxial with the .drill' stem A, and -in the upper portion thereof, and extending through the joint member a whereby fluidmay'be circulated down through the drill stem and outwardly throughlongitudinal circulation passages 18 at the lower end of the drill collar 10, to provide fluid for the cutters D.

The heads or bosses 13 upon the bushing 12 are provided each with a vent passage 13 communicating with the interior of the bushing 12, and the interspace between it and the core tube B and the core itself, which latter is indicated at E. At the'top of the core tube B isa vent controlled by a ball check valve 19 within a cage 20, which is normally seated, but may be unseated by air pressure within the core tube, to permit air displacement upon the introduction of the core within the tube, or displacement of water or any other medium therein. This check valve, however, serves to prevent flooding of the core tube withthe fluid supplied through the circulation passage 17 If, however, the tube becomes so flooded, the vents 13 discharge such fluid matter from the tube. These vents likewise permitdisplacement of air or other media from the core tube upon theintroduce tion of the core, making entrance of the core with the tube easier; and in case the check valve 19 becomes clogged or obstructed drainage of the tube may take place through such vents.

, There are a pluralit of the cutter segments D employed, an they, together-with the collar 10, breaker annulus C andthe bushing 12 are held inplace in the following manner: The cutter sections 15 are internally enlarged to produce shoulders 15. upon breaker annulus C has an opening 21 through.

which headed bolts 22, one at a time, may be passed, the shanks of such bolts being passed "through bores "or perforations 23 n the drill collar 10, and the heads being received within chambers or pockets 24 in the respective adjacent cutter sections 15. Nuts 25 are applied to the outer threaded ends of the bolts 23, externally of the drill collar 10. I

The method of use and operation of a core drill mechanism or device constructed and organized to practice the invention will be readily understood from the foregoing description, taken in connection with the accompanying drawings. However, it may be added that when theparts are assembled, as shown in Figures 1, 2, 3, 4 and 5, the drill stem isoperated through the drill string from the mouth of the bore, and the cutting edge portions or teeth 16 and 16" enter the earth formation and produce a bore of a diameter greater than that of the enlarged drill collar 10, inasmuch as the heads 16 upon the cutters'or cutter segments 15 ex- .tend radially outwardly of the periphery of the ,drill collar 10. As the earth formation is cut away and thecuttings or detritus or mud is removed by the circulation system including the bore 17, the drill stem A and the passages 18, so that'the spoil from the bore passes out at the surface of the bore of the drill string, the core is produced within the field of the'a'ction of the cutting edges of the cutter segments. This core progressively produced in this manner passes upwardly within the cutters, the core breaker, the bushing 12 and the core tube; and, when it is desired to withdraw the core, pulling of the drill string or tubing causes thebreaker larly in the starting of the coring action, r

the core being engaged by the teeth 14 in the rotation of the drill stem and cutters.

and turning with the teeth, the annulus of the core breaker thus turning within the'cutter segments, and, with said teeth, holding the core away llfrom the cutters, and out of anymaterial frictional contact with the in ner face of the bushing 12., The enlarged lower portion of the bushing provides an internal core, chamber within the tube B having an inner diameter greater than the diameter of the core, so that no material friction of the core in engagement with the inner walls of the core tube occurs. The cutters D, with breaker and bushing 12 may readily be removed from the drill stem and drill tube, freeing the core.

It is obvious thatvarious and extensive changes and modifications in construction, formatiom'adaptation, assemblage and combination and association of parts, members and features may be made, and indulged in, in variation and distinction from the foregoing description and statement, and the disclosure of the accompanying drawings, in adapting the improvements to'varying conditions of use and service, without departing from the true spirit of the invention.

; Having thus disclosed my invention, I

claim and desire to secure by Letters Patout:

1. Improvements of the character disclosed, comprising a tubular drill body, and a core tube within the same, means being provided for retaining the core tube against I end.

vertical movement within the'drill body and in driving relation thereto and removable at the bottom thereof, said means comprising a detachable member applied within the bottom of the drill body, saiddetachable member having a vent communicating with the interior of the 'core tube and leading to the exterior of the drill bodyabove its lower 2 Improvements of the character disclosed, comprising a tubular drillrbody, and

a core tube within the same, means being provided for retaining the core tube against vertical movement within the drill body and in driving telation thereto and removable at the bottom thereof, said means comprising a detachable member applied within the bottom of the drill body, said detachable mem- ',--ber having a vent communicating with the interior of the core tube and leading to the exterior ofthe drill body above its lower endysaid core tube having a valve opening at the upper end thereof.

3. Improvements of* the character dis,-

closed, comprising a'tubulardrill body, and

acore tube within the same, means being provided for retaining the core tube against vertical movement within the'drill body and in driving relation thereto and removable at the bottom thereof, said means comprising a detachable member applied within the bottom of the drill body, said detachable member having a vent communicating with the interior of the core tube and leading to the exterior of the drill body above its lower end, said drill body havinga circulation pas- .sage at the upper end portion thereof.

' 4. Improvements of the character disclosed, comprising a tubular drill body, and a core tube within the same, means being provided for retaining the core tube against vertical movement within the drill body and exterior of the drill body above its lower end, said core tube having a valve opening at the upper end thereof, said drill body having a circulation passage. at the upper end portion thereof.

5. In improvements of the character disclosed, a. tubular drill body, a core tube within the drill body, and a bushing within the drill body below said tube and connecting the lower end of the core tube with the drill body, said bushipg being provided with a laterallydisposed vent communicating with the interior of said bushing and leading; to the exterior thereof above its lower en v 1 6. In improvements of the character disclosed,a tubular drill body, a core tube within the drill body, and a bushing within the drill body and beneath the core tube, said drill body being slotted at its lower portion between the interior and exterior thereof,

and said bushing being provided with radial extens ons received within said slots.

7 In improvements of the character disclosed, a tubular drill body, a core tube within the drill body, and a bushing within the v drill body and beneath the c'ore tube, said drill body being slotted at its lower portion between the interior and exterior thereof, and said bushing being provided with radial extensions received within said slots, means being provided for holding said bushing detachably'in position. v

8. In improvements of the character disclosed, a tubular drill body, a core tube withv in the drill body, and a bushing Within the drill body and beneath the core tube, said drill body being slotted at its lower portion, and said bushing being provided with radial extensions received Within said slots, vents being formed in said radial extensions.

9.- In improvements of the-character disclosed, a tubular drill body, a core tube within the drill body, a bushing within the drill body connecting the lower end of the core tube to the drill body, and a core breaker within the drill body beneath the bushing. I

mentioned features detachably in assem- I blage. 1

11. 'In' improvements of the character disclosed, a tubular drill body, a core tube with in the drill body, a bushing Within the drill body connecting the lower end of the core within the drill body beneath the bushing, a J

tube to the drill body, and a core breaker able in assemblage.

12. In improvements of the character disclosed, a tubular drill body, a core tube within the drill body, a cutter having an. upper portion extending axially into the drill body and sup orting the core tube in rigid relation with said drill body, and a core breaker supported by the cutter beneath the core tube.

13. In improvements of the character disclosed, a tubular drill body, a core tube .within the drill body, and a cylindrical cutter.

adapted to. be inserted upwardly within the drill body to support; the core tube and provided with external radial projections'extended upwardly within slots in the lower end portion of the drill body and extending between the interior and exterior of said body. I v I 14. In improvements of the character disclosed, a tubular drill body, a core tube with in the drill --b0dy, and a cylindrical cutter comprising segmental sections adapted to be inserted upwardly within the drill body to support the core tube and provided with external radial projections extended upwardly within slots in the lower end portion "5 of the drill body, there being a bushing Within the drill body and with which'the lower end of the core tube .is' detachably-connected, said bushing having radial projections likewise entered within said slots.

15. In improvements of the character dis closed, a tubular drill body, a core tube within the drill. body, and a cutter segment adapted to be inserted within the drill body beneath the core tube and provided with external radial projections 1 received within slots in the lower endportion of the drill body, there being a bushing withinthe drill body. with which the lower end of the core tube is detachably connected,'said bushing having radial projections likewise entered within said slots, said radial projections'having vents leading to the interior of the core tube.

16. In improvements of the character dis-- closed, a drill body having a central bore and an arcuate cutter body fitting within the 'bore of said drill body and provided with a radial extension extended outwardly within a slot in the lower portionof thedr'ill body, said radial extension being formed at its lower extremity into a cutting edge.

17. In a core drill the combination of; a

tubular drill body having axial openings in the wall thereof extending up a short dis-.

tance from the lower end ofsaid body; a

core tube adapted to be extended upwardly tubular drill body into said body; a bushing secured to the openings and be secured therein to retain said bushing in place.

- 18. In a core drill the combination of: a

tubular drill body having axial openings in" the wall thereof extendin" up. a short distance fromthe loweryen of said body; a core tube adapted to be extended upwardly into said body; a bushing secured to the lower end of said core tube; projections pro-' vided upon said bushing which are received by said openings when said core tube is insertedin said body, said projections having vents formed therein which communicate between the lower end of a core chamber, formed within said core barrel and said bushing and the exterior of said drill body; and cutting means secured to the. lower end of said body in such manner as to hold said bushing in place.

19. In a core drill the combination of: a tubular drill body having axial openings in the wall thereof extending up a short. dis tance from the lower end of said body and from the inner to the outer surfaces of said.

body; a core tube adapted, to be extended upwardly into said body; a bushing secured to the lower end of said core tube; projections provided u received by sai openings when said core tube is inserted in said body; and a cutter on said bushing which are tubular 'drill body having axial openings in the-wall thereof extending up a short dis- ,tancc from the lower end of said body and from the inner to the outer surfaces of said (body; a core tube; adapted to be. extended upwardly into said body; to the lower end of said tions provided upon said a bushing secured core tube; pro ecbushing which are received by said openings when said coretube is inserted in said body. said projections having vents formed therein which communicate between the lower end of a core chamber formed within said core barrel-and said bushing and the exterior of said drill body; and cutting means-secured'to the lower end of said body insuch manner I to hold said bushing in place. 21. In acore-drill thecombination of: 'a

the wall thereof tance fromthelower end of said body and from the inner to the outer surfaces of said body; a core tube adapted to be extended having axial openings in extending up a .short disupwardly into said body; a bushing secured 'to the lower end of said coretube; projections provided upon said bushing which are received by said openings when said core tube is inserted in said body; a cutter member adapted to be inserted upwardly into the lower end of said body; projections formed upon said cutter member which are received by said body openings beneath said bushing between the interior and exterior thereof; a

core tube adapted to be extended upwardly into said body; a bushing secured ,to the lower end of said core tube; projections provided upon said bushing which are received by said openings when said core tube is in-- serted in said body; a cutter member adapted to be inserted upwardly into the lower end of said body; projections formed upon said cutter member which are receive said body openings beneath saitl bushmg projections; means member in place in said drill body, there be ing a core breaker recess formed in said outter member; and a core breaker adapted to be retained in said recess.

23. In a core drill the combination of: a

tubular drill body having axial openings in the wall thereof extending up a short'distance from the lower end of said body; a core tube adapted to be extended upwardly into said body ;"a bushing secured to the lower end of said 'core tube projections provided upon said bushing which are received by said openings when said .core tube is lnserted in sald body; an-annular cutter member formed of arcuate sections abutting" together, abutting faces of sald sectlons having openings; and studs adapted to be inserted in said openings whensaid' cutter member is d'sposed upwardly in the lower end of said I-lll body, and engage the wall. of said body to retain said core tube, bushing and cutter member in assembly with said tubular drill body. 1 j

24. In a core drill the combination of: a tubular drill body having axial openings in the wall thereof extending up a short distance from the lower end of said body and between the interior and exterior thereof; a core tube adapted to be extended upwardly into said body; a bushing secured'to the lower end of said core tube; projections provided upon said bushing which are received by said openings when said core tube is inserted in said body; a cutter member adapted to be inserted upwardly into the lower end of said body; pro'ections formed upon said cutter member -wh1ch are received for holdinglsaid easier by said body openings beneath said bushing projections, said cutter projections forming the major cutting teeth of said core drill; and means for holding said cutter member in place in saicbdrill' body.

25. In a core drill the combination of a tubular drill body having axial openings in the wall thereof extending up a short distance from. the lower end of said body; a core tube adapted to be extended upwardly into said body; a bushing secured to the lower, end of said core tube; projections pro vided upon said bushing Which are received by said opening when said core tube is in-- serted in said body; an annular cutter member adapted to be inserted upwardly inthe lower end of said drill body so as to hold said bushing in place, said cutter memb'erhaving sectors so formed as to provide securmg open ngs at the points of their meeting; minor cutting teeth provided upon 7 the lower edges of said sectors; majorcut ting teeth extending from said sectors so as to fit into said axial drill body openings; and means for securing said cutter member in said drill body, said means extendinginto said securing-openings.

26. In a core drill the combination of: a tubular drill body having axial openings in the wall thereof extending up a short distance from the lower end ofsaid body; a core tube adaptedto be extended upwardly into said body; a bushing secured to the lower end. of said core tube; projections pr vided upon said bushing which are received by said openings when said core tube is inserted in said body; an annular cutter member formed of arcuate sections abutting together, abutting faces of said sections having openings; studs adapted-to be inserted in said openings when said-cutter member a core breaker adapted to be retained in said recess.

27. In a core drill the combinationof: a tubular drlll body having axial openings in the wall thereof extending up a short distance from the lower end of said body; a

core tube adapted to be extended upwardly into said body; a bushing securedto'the lower end of said core tube; projections provided upon said bushing which are re ceived by said openings when said core tube is inserted in said body; an annular cutter member adapted to be inserted'upwardly in the lower end of said drill body so as to hold said bushing in place, said cutter memher having sectors so formed as to provide securing openlngs at the points of their n1eeting;minor cutting teeth provided upon breaker recess formed in said Cuttermemthe lower edges of said sectors; major out her; and a core breaker adapted to be reting teeth extending from said sectors so as tained in said recess. 1 to fit into said axial drill body openings; In testimony whereof, I have signed my 5 means for securing said cutter member in name to this specification.

said drill body, said means extending into saidsecuring openings, there being a core JOHN T. PHIPPS.

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