Nov. 5, 19476.’ ‘ ~s. SHINOMIYA 2,410,753 DRILLING: DEVICE - Filed June 26, 1941 . 4 “ Patented Nov. 5, i946 Zfiid?tii srArEs rarest 2,410,‘? 53 DRILLING DEVICE Shigeru Shinomiya, Tokyo, Japan; vested in the Alien Property Custodian Application .l’une 26, 1941, Serial No. 399,917 1: In Japan June 29, 1940 1 Claim. (Cl. 255-19) i This invention relates to a drilling device com prising a drive pipe, a ?exible pipe extending therefrom and having a plurality of rings mount ed around same at intervals, a plurality of longi 2 lie along the inner and outer sides of the curva ture to be formed are all removed, leaving other longitudinal strips 4 which lie in the opposite side faces as shown in Fig. 3. Then, the entire tudinal connecting strips detachably mounted be pipe is allowed to fall freely through a shaft as ‘tween each two adjacent rings connecting the shown in dotted lines A. At the desired depth, latter, a cable which is attached to the free end the cable 8 is pulled from above the ground. of said flexible pipe and is adapted of being actu Thus, the flexible pipe 2 is bent at the predeter ated from outside for bending said ?exible pipe mined point in the predetermined direction, the where a portion of said longitudinal connect 10 remaining portions of the ?exible pipe being held ing strips are removed, and a drilling mechanism straight. The drilling operation is proceeded in provided at the free end of said ?exible pipe. any transverse direction by gradually varying the The object of the invention is to provide a angle of bend by pulling the cable 8. By rotat novel drilling device which is capable of being ing the driving pipe, the drilling may be pro bent at predetermined point in predetermined ceeded in different planes. Dotted lines B show direction in a deep oil-well by merely pulling an intermediate bent position of the ?exible pipe. a cable from outside the ground, so that it is According to this invention, at the desired por possible to effect transverse drilling at a point in tion of the ?exible pipe to be bent, the longitu stratum of desired depth. dinal connecting strips 4 which prevent ?exing of In the accompanying drawing in which one the pipe are all removed, leaving the other strips embodiment of the invention is shown by way 4 which do not prevent such ?exing.v After in of example: serting the entire device into the shaft, the ?ex Fig. 1 is a side elevation of the device accord ible pipe 2 can be bent at predetermined point ing to this invention, Fig. 2 is a similar view with a portion broken 25 in predetermined direction by pulling the cable 8 away, from outside the ground, and the remaining por Fig. 3 is an enlarged fragmental view, tion of the ?exible pipe is held straight, so that it Fig. 4 is a perspective view showing one of the is possible to effect transverse drilling at any de rings used in this device, and ' Fig. 5 is a perspective view showing one of the . 30 longitudinal connecting strips. sired deep stratum. What I claim is: In a drilling device, the combination of a ?ex ible pipe; a plurality of collars mounted on said Referring to the drawing, i designates a verti cal drive pipe having connected thereto a lower pipe in relatively spaced relation longitudinally extension comprising a ?exible pipe 2 which con sists, for example, of a spirally wound steel strip. 35 of the pipe, and provided peripherally with radi ally extending pins; rigid links mounted on said Around said ?exible pipe 2, there are mounted at pins to connect said collars, the collars on two ‘desired intervals a plurality of rings 3. Adjacent non-adjacent portions of said pipe being con two rings 3 are connected by means of a plu nected by a plurality of links, two of which links rality of longitudinal connecting strips 4%. Each connecting strips ‘1 is provided at its ends with 40 are on diametrically opposite sides of said pipe, the remaining links being disposed at points on holes 5, and is mounted to the rings 3 by means the circumference of said pipe intermediate said of bolts 5 ?xed to the rings 3 and nuts ‘I. A cable two links, the disposition of said links being such 8 is attached to the free end of the ?exible pipe . as to render in?exible the said two portions of 2, and is extended to the outer end of the driv ing pipe I after being passed around a guide 45 the pipe, and the collars on the portion of the pipe intermediate said two non-adjacent portions pulley 9. There is also provided a drilling means being connected by only pairs of links on di a inserted in the free end of the ?exible pipe 2, ametrically opposite sides of the pipe respec and a driving device (not shown) is enclosed within the pipe. tively thereby rendering ?exible said intermediate The operation of the device according to this 50 portion of the pipe; means for bending said in? invention is as follows: termediate portion; and a drilling element mount At any position of the ?exible pipe 2 where it is ed at the free end of said pipe. desired to be bent, the longitudinal strips 4 which SHIGERU Sl-IINOMIYA.