Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2362529 A
Publication typeGrant
Publication dateNov 14, 1944
Filing dateAug 30, 1940
Priority dateAug 30, 1940
Publication numberUS 2362529 A, US 2362529A, US-A-2362529, US2362529 A, US2362529A
InventorsBarrett George J, Rose Robishaw
Original AssigneeA 1 Bit And Tool Company Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Side tracking apparatus
US 2362529 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Nov. 14, 1944. G. .'J. BARRETT ETAL SIDE TRACKING APFARATUS Filed Aug. so; 1940 4r w Mk n A W 0 2 H f mg m V md. A E N l ,6 w l E r l E s o 6 o y .f W Z 4 C I I Il L 2. l I 'Il Il Il Il Il. PPI. a b 7 8 6 0 TY 6 2 l v 3 4 5 n ,sm...sm?.\.nsn. .,9/

IIIIIIII Patented Nov. 14, 1944 SIDE TRACKINGAPPARATUS George J. Barrett and Sosthene Robicha'ux; Houston, Tex.; Rose Robishaw, executrix of l -A-l Bit land Tool Com a special partnership said Sosthene Robichaux; deceased, assignors to pany Ltd., Houston, Tex.,v

*Application August so, 1940, serial No. 354,816' 'ff 4 olaims.- (e1. 25E- 1.6) 'l Thisinvention'relates to side tracking apparatus. 'e v V e g An object of .theinven'tion is to provide apparatus of the character described specially de signed for forming' a side window in a well casing through whichfurther drilling operations may -be continued. l

In drilling wells it often happens that the well becomes obstructed so that drilling operations cannot be continued through the original well bore; or the original -bore may become deflected to such an extent that it becomes necessary to straighten the same. In either of such events a whipstock may be lowered into the well and oriented and anchored in place at the desired location and a milling tool then lowered into the well to co-act with the whipstock and whereby -a vertically elongated window may be formed through the side of the casing through which further drilling may Proceed.

It is another object of the present invention to provide apparatus embodying a novel type of whipstock for carrying on the side tracking operation hereinabove referred to.

The invention embodies a novel type of whipstock wherein the guide for the milling tool comprises antifriction roller bearings which will hold the milling tool against the work, this form of Ithe apparatus being specially designed for `forming a window in the casing either by milling the casing, if this can be done, or by shattering the side wall of casing which has 4become too hard to be milled out.

With the above and other objects in view the invention has particular relation to certain novel features of construction, operation and arr-angement of parts examples of which are given in this specification and illustrated in the accompanying drawing wherein- Figure l shows a fragmentary, vertical, sectional view of rthe whipstock showing the milling tool-in coo-peration therewith.

Figure 2 shows avertical sectional View showing the whipstock in elevation. e

Figure 3 shows a cross sectional View taken on the line 3 3 of Figure l, and

Figure 4 shows an enlarged, fragmentary, elevational View of the type of whipstock shown in Figures l and 2.

Referring now more particularly to the drawing wherein like numerals of reference designate the same yparts in each of the iigures, the numeral I designates a whipstock whose lower end is approximately cylindrical and which may be set in. the well casing 2 at any desired elevation'. When on vertical axes.

lowered to the .point where it is to beset it may be fixed in theca'sing against further downward movement in any conventional manner as shown,

' it is provided with arrlupwadly and outwardly t'a'- perin'fg' face 3" and an upwardly taperingV wedge shaped slip` #works against the face 3. Inthe present illustration a- 5- is attached to thel slip #and extends on dowfinto the well and is of a length to cause thevslip't'o set' at the desired elevation. When the whipstock is lowered untilthe lower end of the rod lands on bottom, it will then force the slip 4 upwardly relative to the whipstock and outwardly into engagement with the well casing. The slip has the external downwardly pitched teeth which will engage the casing and set the whipstock against downward movement during subsequent milling operations. The whipstock may be attached to the lower end of the milling tool as 6a which in turn is carried at the lower end of the drill stern 1. It may be so attached by means of a suitable shear pin as 8 and when it is let down into the well and set the pin may be sheared to allow the milling tool to move on downwardly as hereinafter explained.

The whipstock is provided with the upper and lower downwardly and outwardly tapering faces 8 and I0 which are spaced -apart to provide the vertical face II between them. These faces are arcuate in horizontal cross sectional contour.

It sometimes happensthat the casing 2 is so hard that it cannot be readily cut away by a mill in forming the window. Usually, however, the very hard casing can be broken so as to form a window therethrough. For this purpose a special type of whipstock and mill has been provided as shown in Figures 1 to 4, inclusive. Series of rollers II are mounted on the -vertical face I I of the whipstock. These rollers are mounted to rotate The mill Ga, to be'used in such case, has its lower face formed into an approximately inverted conical shaped guide 6b which engages against the inside of the casing, as shown in Figure 1. AS the work progresses, this mill operates against the casing as well as against the rollers I1 and as it moves downwardly it is wedged between said rollers and the casing and the weight of the drill stem above will cause it to crush the side of the casing against which it operates thus gradually forming an elongated window through the side of the casing.

The milling tool is provided with external cutting teeth, as shown, and the form of mill shown in Figure 1 will either shatter or cut away the' casing so as to effectively form an elongated window therethrough through which subsequent drilling operations may be carried on.

When the lower tapering face l0 has been reached by the milling tooll 6a, said tool is withdrawn and a special type of mill is then employed y Gil tool is lowered between said surface and the opy posing side of the casing and whereby the milling tool will be forced through said side of the i casing as the tool is lowered and rotated.

2. Inside tracking apparatus for wells, a whipstock shaped to enter a well casing, means for anchoring the whipstock to the casing, said whipstock having a longitudinal surface abovel the anchoring means and spaced from one side of the casing when the whipstock is in the casing, antifriction means arranged on said surface in position-to contact with a milling tool as said tool is lowered between said surface and the opposing side of the casing and whereby the milling tool will be forced through said side of the casing as the tool is lowered and rotated.

3. In side tracking apparatus for wells, a whip stock shaped to enter a well casing and adapted to force a milling tool through the side of said casing, said whip-stock having a lower downwardly and outwardly tapering face and an approximately vertical face above the tapering face and anti-friction rollers disposed along the vertical face of the whip stock approximately from end to end thereof.

4. Side tracking apparatus for wellscomprising a well casing, a milling tool, a stem for driving the tool, a, whip stock shaped to enter the well casing and adapted to force the milling tool through the side of said casing, said whip stock having upper and lower downwardly and outwardly tapering faces and an approximately vertical face between said tapering faces and rotatable, bearing means extending from the upper to the lower end of the vertical face of the whip stock and arranged to hold the milling tool in contact with the casing and out of contact with said vertical face.

GEORGE J. BARRETT. SOSTHENE ROBICHAUX.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2558227 *Dec 17, 1945Jun 26, 1951A 1 Bit & Tool CompanySide wall core taking apparatus
US5361833 *Nov 18, 1993Nov 8, 1994Triumph*Lor, Inc.Bottom set, non-retrievable whipstock assembly
US5383522 *May 16, 1994Jan 24, 1995Atlantic Richfield CompanyWhipstock and method
US5425419 *Feb 25, 1994Jun 20, 1995Sieber; Bobby G.Whipstock apparatus and methods of use
US5467820 *Apr 11, 1995Nov 21, 1995Sieber; Bobby G.Slotted face wellbore deviation assembly
US5474125 *Apr 11, 1995Dec 12, 1995Sieber; Bobby G.Retrieval tool for use with a slotted face wellbore deviation assembly
US5474133 *Apr 11, 1995Dec 12, 1995Sieber; Bobby G.Method for retreiving a slotted face wellbore deviation assembly using a retrieval tool
US5499680 *Jan 30, 1995Mar 19, 1996Halliburton CompanyDiverter, diverter retrieving and running tool and method for running and retrieving a diverter
US5499682 *Apr 11, 1995Mar 19, 1996Sieber; Bobby G.Method for setting a slotted face wellbore deviation assembly using a rectilinear setting tool
US5531271 *Mar 31, 1995Jul 2, 1996Weatherford Us, Inc.Wellbore tool side support
US5535822 *Sep 8, 1994Jul 16, 1996Enterra CorporationIn an oil or gas well
US5549163 *Apr 11, 1995Aug 27, 1996Sieber; Bobby G.Piston sleeve valve for use with oilfield fishing operations
US5551509 *Mar 24, 1995Sep 3, 1996Tiw CorporationMill lick out apparatus
US5553671 *Apr 11, 1995Sep 10, 1996Sieber; Bobby G.Piston sub for isolating drilling fluids from hydraulic fluids
US5564503 *Aug 26, 1994Oct 15, 1996Halliburton CompanyMethods and systems for subterranean multilateral well drilling and completion
US5620051 *Jun 3, 1996Apr 15, 1997Weatherford U.S., Inc.Whipstock
US5647436 *Feb 20, 1996Jul 15, 1997Tiw CorporationMethod of forming a window in a downhole tubular
US5730221 *Jul 15, 1996Mar 24, 1998Halliburton Energy Services, IncMethods of completing a subterranean well
US5787978 *Nov 19, 1996Aug 4, 1998Weatherford/Lamb, Inc.Multi-face whipstock with sacrificial face element
US5803176 *Jul 15, 1996Sep 8, 1998Weatherford/Lamb, Inc.Sidetracking operations
US5806595 *May 2, 1996Sep 15, 1998Weatherford/Lamb, Inc.Wellbore milling system and method
US5813465 *Jul 15, 1996Sep 29, 1998Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US5826651 *Jul 30, 1996Oct 27, 1998Weatherford/Lamb, Inc.Wellbore single trip milling
US5833003 *Jul 15, 1996Nov 10, 1998Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US5836387 *Aug 13, 1997Nov 17, 1998Weatherford/Lamb, Inc.System for securing an item in a tubular channel in a wellbore
US5862862 *Jul 15, 1996Jan 26, 1999Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6024168 *Oct 31, 1997Feb 15, 2000Weatherford/Lamb, Inc.Wellborne mills & methods
US6035939 *Nov 9, 1998Mar 14, 2000Weatherford/Lamb, Inc.Wellbore anchor system
US6056056 *Jan 18, 1998May 2, 2000Durst; Douglas G.Whipstock mill
US6059037 *Jun 30, 1998May 9, 2000Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6070665 *Apr 1, 1998Jun 6, 2000Weatherford/Lamb, Inc.Wellbore milling
US6076602 *Jul 1, 1998Jun 20, 2000Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6092601 *Jun 30, 1998Jul 25, 2000Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6116344 *Jul 1, 1998Sep 12, 2000Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6135206 *Jul 1, 1998Oct 24, 2000Halliburton Energy Services, Inc.Apparatus for completing a subterranean well and associated methods of using same
US6155349 *Mar 3, 1998Dec 5, 2000Weatherford/Lamb, Inc.Flexible wellbore mill
US6202752Feb 18, 1999Mar 20, 2001Weatherford/Lamb, Inc.Wellbore milling methods
US6547006Jun 5, 2000Apr 15, 2003Weatherford/Lamb, Inc.Wellbore liner system
US6766859Sep 16, 2002Jul 27, 2004Weatherford/Lamb, Inc.Wellbore liner system
US7025144May 25, 2004Apr 11, 2006Weatherford/Lamb, Inc.Wellbore liner system
US7207401Oct 14, 2003Apr 24, 2007Smith International, Inc.One trip milling system
US8393404 *Apr 30, 2010Mar 12, 2013Smith International, Inc.Downhole multiple bore rotary diverter apparatus
US20100276158 *Apr 30, 2010Nov 4, 2010Smith International, Inc.Downhole multiple bore rotary diverter apparatus
EP0289988A1 *May 2, 1988Nov 9, 1988FRIEDRICH DUSS MASCHINENFABRIK GMBH & CO.Rotating tool for undercutting in a drill hole
EP0701040A2 *Aug 24, 1995Mar 13, 1996Halliburton CompanyDownhole diverter and retrieving tool therefor
WO1995031630A1 *May 2, 1995Nov 23, 1995Arco British LtdWhipstock and method for setting such a whipstock
Classifications
U.S. Classification166/55.3, 166/117.6
International ClassificationE21B29/00, E21B29/06, E21B7/06, E21B7/04
Cooperative ClassificationE21B29/06, E21B7/061
European ClassificationE21B7/06B, E21B29/06