US2189033A - Reamer - Google Patents

Description

6, 1 H. B. BOOK ET AL 2,139,033

REAMER Filed April 1, 1939 Patented Feb. 6, 1940 UNITED STATES REAlVIER Howard B. Book and Robert homa City, Okla., assignors A. Hanlin, Oklato Reed Roller Bit Company, Oklahoma City, Okla., a corporation of Texas Application April 1, 1939, Serial N0. 265,394

Claims.

This invention relates to reamers for use in connection, with drilling wells. It has for its general object the provision of a structure whereby reamer cutters of the roller type may 5' be firmly and rigidly mounted within cutters recesses in a reamer body.

In mounting reamer cutters within their recesses it is essential that they be mounted as firmly as possible and that there be no possiiu' bility of play between any of the parts constitutingtne mounting during the operation of the reamer. It is, therefore, an object of this invention to provide a structure for mounting a reamer cutter in a recess in theside of a reamer body in such a manner as to give the greatest possible degree of rigidity to the mounting, prevent any play or lost motion between the parts of the mounting during operation, and at the same time use the smallest possible number easily be broken or distorted.

.-A further object of this invention is to provide a structure for mounting reamer cutters in from and replaced in the reamer body with'out necessity for use of any special tools or skilled labor. I

Another object of this invention is to provide a structure wherein the reamer cutter may be assembled upon its axle with means on the'ends thereof-for mounting the same in a reamer body, and this assembly insertedjinto or removed from the reamer body as a unit.

Another object of this invention is toavoid the necessity for delaysand inconveniences resulting from breaking orwearing out of reamer cutters.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawing, it being understood that the same is by way of illus tration and example only.

Inthe drawing: 7 d Fig. l is a side elevation of a reamer body constructed in accordance with this invention, showing the reamer cutters in place therein.-

Fig. 2 is a vertical cross section through one wall of the reamer body illustrated in Fig.1 and through one of the cutters mounted therein.

Fig. 3 is a horizontal cross section taken along the line 3-3 of Fig. ,l looking upwardly.

Fig. 4 is a side elevation of the sectional wedging ring securing device forming part of this invention.

of parts and eliminate any parts which might which the reamer cutter may be readily removed Fig. 5 is a horizontal cross section taken along the line'5-5 of Fig. 1 looking upwardly.

Fig. 6 is a fragmentary horizontal cross section taken along the line 6-6 of Fig. 1.

Fig. 7 is a fragmentary vertical cross section taken along the line 1-1 of Fig. 3. g

In accordance with this invention, a reamer body I is formed with a major recess 2 and with auxiliary recesses 3 and 4 at the opposite ends of the major recess, respectively. It will be understood that while only one major recess and associated minor recesses are referred to in this description, there will be under ordinary cir-- cumstances two, three or even more 'major recesses with their associated reamer cutters in any given construction.

Welded to the opposite sides of each of the auxiliary recesses 3 at positions adjacent the ends of the respective major recesses there are provided wedge blocks 5, these blocks being tapered from end to end and from their exterior edge to their interior edge so that when secured in place by the Welding indicated at 5 they will form tapering dovetail portions within each of the auxiliary recesses 3. These tapered dovetail portions are illustrated in the drawing [as tapering toward a smaller dimension in a direction awayfrom the major recesses 2. i I

About the body l and intersecting the auxiliary recesses 4 at the opposite end of each of the major recesses 2 there is formed a circumferential groove-having side walls which converge inwardly toward the axis of the body and which groove is adapted to receive the sectional ring consisting of sections 7 and 8 which are hinged together by means of complementary hookshaped portions 9; and It formed on their respective ends. The free end of the section I is bifurcated to form a pair of tongues or projections H and I2, while the free end of the other section 8 is formed with a tongue-like portion I3 of a width to fit between the tongues II and I2. Transversely through all three of these tongues ll, l2 and it there are provided openings adapted to receive a wedge-like member I4. This member Hi when forced into the transverse openings in the tongues ll, l2 and i3 will serve to draw the free ends of sections 1 and 8 toward each other and hold them together. This wedge member it is provided witha stem l5 projecting from its smaller end in alignment with the main body of the wedge I4 and threaded to receive a nut It. The nut I6 is adapted to be seated within a recessed portion l! in the side of the tongue l2 so that when it is tightened it will draw the wedge l4 into tighter engagement with the sections 1 and 8 and draw these sections more tightly into engagement with the groove provided therefor.

As will be seen in Fig. 7, a small recess I8 is provided in the body i for the accommodation of the larger end of the wedge 14 and of a wrench for the purpose of turning the nut [6.

The reamer cutter i9 is rotatably mounted upon a cutter pin or shaft 20 having blocks 2! and 22, respectively, at its lower and upper ends. The block 2! at the lower end of the shaft 20 is illustrated as being made integral with the said shaft, whereas the block 22 at the upper end thereof is simply provided with an opening adapted to receive the upper end portion 23 of the shaft 20. This upper end portion is of slightly reduced diameter so that when the block 22 is placed thereon it will be definitely spaced from the block 2! by coming in contact with the shoulder 24 on the pin 2B. This clearance will assure the proper space between the blocks 2! and 22'to accommodate the cutter E9. The block 2| is tapered toward a smaller dimension in a direction away from the reamer cutter l9 and in a direc-- tion outwardly with respect to the body I so that it will seat within the tapered dovetail portion of the auxiliary recess 3 and be held in place by the welded wedge shaped blocks 5.

The block 22 has an inclined portion 25 adapted to substantially register with one wall of the groove provided for the reception of the sectionalhinged ring previously described when the cutter and blocks 2! and 22 are fully assembled with respect to the body I. This block 22 also has a tongue-like part 26 projecting along the bottom of the auxiliary recess 2 and adapted to underlie the hinged sectional ring hereina-bove referred to.

In assembling the parts, the body is made up as at first described above and the blocks 5 are welded in place as shown at 6. The cutter assembly is also made up and. prepared for mounting in the body. The cutter i9 is then placed about the pin 20 and allowed to drop into contact with the block 2! after which the smaller end of this block is inserted through, the major recess into the upper end of the auxiliary recess 3. The block 2! is moved down in theauxiliary recess 3 until it wedgingly engages with said recess. The block 22 is now placed in the auxiliary recess 4 and moved downwardly over the endof the pin 29 to the position shown in Fig. 2. The

, sections 7 and 8 are hinged together as shown in Fig. 3 and placed about the body 5 over the tongue-like parts 26 and brought together until the tongues ll, I2 and i3 interlock with each other as shown in Figs. 4 and7. The wedge 14 is inserted through the openings provided in the tongues H, 12 and I3 and the nut I 6 placed on the stem I5 and tightened to draw. the wedge l4 into tight engagement with the sections 1 and 8, thus tending to reduce the size of the com-.

posite ring formed by these sections. This action, due to the inclination of the sides of the groove around the body and the corresponding cross sectional shape of the ring as shown in Fig. 4, will tend to urge the blocks 22 downwardly together with the shafts 20 and thus to seat the blocks 2! more firmly within the auxiliary recesses 3. At the same time, the composite ring referred to will assert a radial pressure against the inclined surface 25 of the edge of the blocks 22 and will ultimately come into contact withthe tongue shaped part 26 of each of these blocks to holdthem firmly in the auxiliary recesses 4 and prevent any radial outward movement of these blocks.

In the event it is desired to remove a'worn cutter for the purpose of replacement or repair the reverse operation can be quickly carried out. It is only necessary toloosen the nut I 6, drive out the Wedge i l, remove the ring sections 1 and 8, lift out the block 22, and drive out the block 2!. This can all be readily accomplished Without any special tools and without the necessity for any skilled adjustment.

Likewise, no skilled adjustment is necessary when mounting the cutters in the body, it being necessary only to tighten up the respective securing means to the degree desired. a i i It will be appreciated from the foregoing that the cutter assembly consisting of the roller cutter and the shaft and the end blocks may be assembled in the factory and extra assemblies may be provided on each job at a relatively low cost. These assemblies may be removed and replaced as a unit in the manner above described, or if only one of the elements in the assembly be worn or otherwise damaged, such element may bereplaced without replacement of those not Worn' or damaged. The clearance for the cutters may be closely regulated by skilled operations in the factory so that the block 22 will always be spaced from the block 2| by the proper amount to give the cutter the proper clearance.

Furthermore, when the cutter assembly is in place within the reamer body it will be found to be positively secured against movement in any direction and a rigid, trouble be assured.

Having described our invention, we claim:

free mounting will 1. In a reamer construction, a reamer body having a major recess and an auxiliary recess at each end of said major recess, a reamer cutter shaft, a reamer cutter rotatably mounted thereon, a block carried by one end of said shaft and having a part adapted to wedgingly engage one of said auxiliary recesses, a block carried by the opposite end of said shaft and adapted to lie within said'other auxiliary recess, a removable sectional ring adapted to be placed about said body and to overlie a portion of said second block and urge the same toward said first block, and means for removably securing said sectional ring in place about said body.

2. In a reamer construction, a reamer body having a major ,recessand an auxiliary recess at one end of said major recess, a reamer cutter shaft, a reamer cutter rotatably mounted thereon, means forming a support for one end of said shaft adjacent one end of said major recess, and a blockcarried by the other end of said shaft and adapted to lie within said auxiliary recess, a removable sectional ring adapted tobe placed about said body and to overlie a portion of said block tosecure the same in said recess, and meansfor securing said sectional ring in place about said body.

3. In a reamer construction, a reamer body having a major recess and anauxiliary recess atone end of said major recess, a reamer cutter shaft, a reamer cutter rotatably mountedjthere on, means forsupp'orting one end of said shaft adjacent one end of said major recess, a block onthe opposite end of said shaft adapted to lie within said. auxiliary recess, and a removable ringv adapted to be placed about said body andto overlie a portion of said block to hold the same within said auxiliary recess, said ring compris-.

' ing two sections hingedly connected to each other at one pair of their adjacent ends, and means for drawing together the opposite pair of adjacent ends of said sections to tightly bind said ring about said body.

4. In a reamer construction, a reamer body having a major recess and an auxiliary recess at one end of said major recess, a reamer cutter shaft, a reamer cutter rotatably mounted thereon, means for supportingone end of said shaft adjacent one end of said major recess, a block on the opposite end of said shaft adapted to lie within said auxiliary recess, and a removable ring adapted to be placed about said body and to overlie a portion of said block to hold the same within said auxiliary recess, said ring comprising two sections hingedly'connected to each other at one pair of their adjacent ends, said sections having overlapping parts on the opposite pair of their adjacent ends, and wedging means engaging said overlapping parts and adapted 'to draw the same together to decrease the sizeof said ring and bind it securely about said body. A

5. In a reamer construction, a reamer body having a major recess and an auxiliary recess at each end of said major recess, one of said auxiliary recesses being in the form of a dovetail tapering toward a smaller dimension in a direction away from said major recess, a reamer cutter shaft, a reamer cutter rotatably mounted thereon, means on one end of said shaft having a part adapted to wedgingly engage said tapered dovetail, a block carried by the opposite end of said shaft and adapted to lie within said other auxiliary recess, a removable sectional ring adapted to be placed about said body and to overlie a portion of said second block and urge the same toward said first block as the size of said sectional ring is decreased, and means for decreasing the size of said opposite ring by drawing the sections thereof together into tight engagement with said body.

HOWARD B. BOOK. ROBERT A. HANLIN.

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