US2189923A - Coring and drilling device - Google Patents

Description

J. T. PHIPPS 2,189,923

CORING AND DRILLING DEVICE Filed June 21, 1937 3 Sheets-Sheet 1 ATTORNEY Filed June 21, 1937 3 Sheet s-Sheet 2 INVENTORI 707$J ZIP/ukps,

ATTORNEY Patented Feb. '13, 1940 PATENT; OFFICE v v oonmomnnnmo nnvlcn' John T. Phipp Huntington Park, Calif., as-

signor to Herman 0. Application June 21,

.6 Claims.

This invention relates to coring and drilling devices, and particularly to a type which may be used in conjunction with rotary apparatus.

An object of the invention is the provision of a coring device adapted, by its construction, to secure an accurate section of the formation, hard or soft, or both, without the necessity of withdrawing the drill pipe to secure the core.

An object of the invention is the provision of a coring device which may be utilized in rotaryapparatus for the purpose of securing a core of the formation during operation of said rotary apparatus, and which core may be readily withdrawn through the drill pipe, released from the coring device, and the coring device again passed through the drill pipe to adjacent the cutting elements to secure a further core of the formation.

Further objects include a coring and drilling device which permits a large percentage of recovery of the core, in which the core is not rotated during drilling, wherein the parts of the invention are not subject to being broken or distorted, which permits the securing of a core within a minimum of time and with safety, which is so constructed as to allow ready circulation of slush around the coring device and outward through the bit in the usual manner, and which effectively holds the core to facilitate its recovery.

The invention has for a further object the provision of a coring device which is simple of construction, inexpensive in cost of manufacture, and generally superior.

With the above mentioned and other objects in view, the invention consists in the novel and useful provision, formation, construction, asso ciation, and relative arrangement of parts, members and features, all as depicted in certain embodiments in the accompanying drawings; de-

scribed generally, and particularly pointed out in the claims.

In the drawings: Figure 1 is a fragmentary and partially vertically sectioned view of a portion of the coring device received within a drill and its associated members, the said drill being in the act of cutting away formation in the forming of a well hole,

Figure 2 is a fragmentary vertically sectioned view of the improved coring device and showing the position assumed thereby within rotary drilling apparatus,

Figure 3 is a continuation of Figure 2 in vertical section,

Smith, Whittier, Calif.

1931, Serial No. 149,340

Figures 4, 5 and 6 are sectional views on the lines 4-4, 55, and 6-6 of Figure 2,

Figure 7 is a fragmentary vertical sectional view showing certain of the parts of the invention in changed relationship from that shown in Figure 2, and,

Figure 8 is a continuation of Figure '7.

Referring to the drawings, in Figure 1, I have shown at I a drilling device carrying at one end a bit for the purpose of cutting formation to provide the well hole shown at 2. Within said rotary drilling device is confined a coring device designated as an entirety by 3. This coring device is so arranged within the drilling device I that the same may be removed therefrom when a sub 4 is engaged by a grab 5.

Referring to Figures 2 and 3, I have shown a sub l0 having threaded boxes H and II, the zone included between the threaded boxes being provided with a threaded area l3 of uniform diameter. The box l2 has threaded thereto a barrel 14. This barrel, which forms a part of the rotary drilling device, is thickened in crosssection adjacent its ends at l5 and I6 so as to withstand stresses and likewise provide sufficient material for the external threaded areas I! and I8 thereof. In this respect, it will be noted that the threads I! are in engagement with the threads of the box l2. I9 is a drill collar provided with a threaded box 20, the threads of which box are adapted for engagement with the threads l8 of the barrel. The drill collar is formed at 2| with a threaded tapered pin and the bit body 22 is provided with a threaded box 23, whereby the bit body may be secured to the threads of the pin 2|. The bit secured to the body may be of conventional form and, in the present instance, includes a crown type bit 24 and a fish tail typev 25. The crown type is provided with an inner tapered wall 26 within which is placed segmental slips 2! together with a core catcher 28 secured to said slips. The core catcher includes an annulus 29 securing ends of spaced-apart inwardly converging curved fingers 30. The body of the bit has two portions of different but uniform diameter, as shown 7 at 3| and 32. Included between the outer surface of the bit body and the surface defined by 3| are water courses 33. Thus, a fluid passed through the barrel I4 and collar 19 will likewise pass through the courses 33 and-through the crown bit.

Adapted to be received within the drill structure just described is the coring device. This includes a core barrel 50 externally threaded at 5! for co-engagement with the threaded area 82 of a collar 53. This collar is provided with an enlarged inwardly-directed flange $4 at one end thereof. Adapted to be supported upon the inner surface of the flange 56 is a core catcher 58. This core catcher includes an annulus es having secured thereto on the inner surface thereof, spring flngers 51. These spring flngers converge at their free extremities. In order to support the collar 53, an annulus 58 provided at one end with an outwardly-directed flange 59 and at its opposite end with an inwardlydlrected flange 80, is provided. The flange 68 may engage the flange 54 and act as a support for the collar 53 and core barrel 50 during certain operation of the invention.

Included between the flange 59 and the body of the bit are bearings 6|. The opposite end of the core barrel 50 is internally threaded at 62 and a valve seat member 63 is provided with a threaded pin 64 for engagement with the threads 82. The valve seat member is provided with a central bore 65, the seat proper being shown at 56, and a ball valve 61 normally rests upon said seat. The valve seat member also includes a cage 88. This cage, in the present instance, comprises a tube provided with spaced-apart slots, the slots being shown at 69. The cage is likewise internally threaded at I0, whereby it may have threaded engagement with the threads ll of a race I2. The race I2 is formed with a central bore I3 and passed through said bore is a shank I4 of a second race I5. The shank I4 is provided with a screw-threaded end IS in screw-threaded engagement with a partially threaded central bore ll of a third race I8. Interposed between the races I2 and I5 are bearings I9, and between the races I2 and I8 are bearings 80. The third race I8 is provided with an externally threaded area 8!, and threaded thereto is a tubular coupling 82. This tubular coupling carries at its upper end 83 a jransverse plate 84, and the plate in turn is provided with a diametrical slot 85, the central portion of which is concaved, as shown at 86 in Figure 5. Above the plate 84 are slips 8'! and 88, and said slips are so formed that the outer serrated surface thereof parallels the threaded area I3 of the sub Ill. The slips are both formed with tapered dove-tailed grooves 89. Headed bolts 90 are passed through the transverse slot 85 of the plate and are in threaded engagement with the slips, as illustrated at 9| Furthermore, both slips are provided with parallel sides, as shown best in Figure 4, and by this construction afford ways for the passage of fluid through the sub and into the barrel I4 (see Figure 4) The mandrel 92 is provided with convergent oppositely-positioned dove- tails 93 and 84 for reception within the dove-tail slots of the slips. This mandrel also includes a shank 95. A stem 86, externally threaded at both ends, has the threads of one end received within a threaded bore of the convergent end of the mandrel, as see Figure 2 at 91. The opposite threaded end of the stem is secured within a screw-threaded hore of a head 98.

pipe shown in Figure 1 at I00, and this rotation is imparted by the-drill pipe to the drilling device and will cause the bit to engage the formation and form the well-hole, During the forming of the well-hole, mud-laden fluid is being pumped through the drill pipe and outwardly around the bit as is the usual practice. The coring device, considered as an entirety, is within the drilling device, but the said coring device does not rotate during rotation of the drilling device. In this regard, it will be noted that when the parts of the invention are in the position illustrated in Figures 2 and 3, that rotation of the drilling device will permit a core of the formation to pass through the crown bit and upwardly within the core barrel 58. The core catchers shown at 30 and 55 will prevent retrograde movement of the core so that the core will at all times enter the core barrel and be held therein. When a given length of core, as defined by the length of the core barrel, has been received therein, the coring device may be removed from the drilling device to the surface of the well by allowing the grab 5 to secure the shank 95. When the grab is moved upwardly through the drill pipe, the mandrel will be moved to cause the slips 81 and 88 to travel along the dove-tails of said mandrel, and release the-toothed engagement between said slips and the threads 53, as see Figure '7. When this occurs, the slips will approach and the headed screws will move within the slot 85. The head 98 will contact the heads of the screws, see Figure I, and the core barrel will be lifted upon continued movement of the grab from the drilling device. The core catcher 55 will hold the core within the core barrel. The member 58 which is in reality a floating ring, will remain within the bit body. After the core has been removed from the core barrel, the coring device may again be lowered through the drill pipe until such time as the core catcher, and particularly the flanged end 5|, engages the flange 68 of the floating ring.-

Continued downward movement of the grab permits the mandrel 92 to move the slips 81 and 88 into engagement with the threads I 3, and the device is again locked within the drilling device. This locking engagement between the slips and the sub is necessary, to the end that when a core enters the core barrel, the barrel in turn is not forced upwardly by the core.

As before stated, circulation is permitted through the drill pipe and bits, and excess mudladen material is permitted passage through the valve 61 and outwardly through the openings 69' of the cage. Thus, the mere fact that the coring device as an entirety is left within the drilling device makes little difference because an accurate core may be obtained at any desired zone during a drilling operation through the simple ex pedient of lowering the grab and removing the coring device in the manner stated heretofore.

I claim:

1. In combination with rotary apparatus and its drill pipe, a sub connected to said drill pipe. a barrel carried by the sub, a drill secured to said barrel, and the sub provided with an annular threaded area of uniform diameter, of a coring device including a core barrel within said first named barrel, a swivel between said core barrel and drill and adapted to support one end of said core barrel, a valve and its cage carried by the opposite end of the core barrel, slips for engaging the threads of said sub, means of connection between said slips and cage including a second swivel, and a mandrel for actuating said slips to move the same into engagement with the threads of said sub or out of engagement therewith, and whereby when said slips are in engagement with the teeth of said sub, the core barrel is held in one position within the first named barrel, and when the slips are moved by said mandrel to disengage the said threads, the said core barrel may be removed from the first barrel.

2. A coring device including a core barrel, a valve and its cage secured to one end of said barrel, a race carried by the cage, a race provided with a shank within the cage, and bearing members between the said races, said shank being passed through the first race, a third race, the said shank being secured thereto, and bearing members between said first and third races, a tubular member secured to said third race and provided with a cap formed with a longitudinal slot, slips above said cap,,and means between said cap and said slips for securing said slips to the cap and permitting movement thereof, and a mandrel formed for engagement with said slips to cause relative movement of said slips.

3. A coring device including a core barrel, a valve and its cage secured to one end of said barrel, a race carried by the cage, a race provided with a shank within the cage, and bearing members between the said races, said shank being passed through the first race, a third race, the said shank being secured thereto, and bearing members between said first and third races, a tubular member secured to said third race and provided with a cap formed with a longitudinal slot, slips above said cap, means between said cap and said slips for securing said slips to the cap and permitting movement thereof, and a mandrel formed for engagement with said slips to cause relative movement of said slips, said mandrel provided with a stem and a head carried by said stem within said tubular member secured to said third race, whereby when the mandrel is moved to one position, the said head engages the said means between the cap and the slips.

4. The combination with rotary drilling apparatus, including an internally threaded sub to be secured to drill pipe, a barrel secured to said sub, a bit, and a drill collar securing said barrel and said bit, of; a coring device within said drilling device, comprising a core barrel, a core catcher secured at one end or said core barrel, a valve at the opposite end or said core barrel, said valve including a cage and a series of interconnected races having bearings, one of which races is secured to said cage, a tapered mandrel, slips within the threaded area of the drill sub adapted to be actuated into engagement with said threads or out of engagement therewith dependent upon movement of saidmandrel, and means of connection between one of the races and said slips; said slips when in engagement with said threads maintaining the remaining parts of said coring device in position within said drilling device, and when out of engagement with said threads permitting removal of said coring device from the drilling device.

disengagement of said lock members with the teeth of said sub; a cage swivelly secured to the lock members, and a core barrel depending at one end from said cage, the opposite end of said core barrel terminating adjacent the central opening of said bit, and a core catcher in said end of the barrel whereby when a core is cut by said bit, the same is passed through said central opening of the bit and into said core barrel, the core barrel being held stationary by said core during rotation of said bit due to the swivel mounting of said cage.

6. The combination with rotary drilling apparatus including an internally threaded sub to be secured to the drill pipe, of a coring device within the drill pipe including a swivelled core barrel, a tubular member secured to the top thereof provided with a cap formed with a longltudinal slot, slips above said cap, means between said cap and said slips for securing said slips to the cap and permitting movement thereof, and a mandrel formed for engagement with said slips to cause relative movement of said slips for engagement or disengagement with the internally threaded portion of the sub, said mandrel provided with a stem and a head carried by said stem within the tubular member that is secured to the top of the core barrel whereby when the mandrel is moved to one position the said head engages the said means between the cap and slips.

JOHN T. PBIPPS.

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