US 1790761 A
Description (OCR text may contain errors)
Feb. 3, 1931. A. P. ORTOLON TOOL Filed Feb. 20, 1928 Patented Feb. 3, 1931 UNITED STATES ARTHUR P. ORTOLON, or COTTONQIVALLEY! LonIsrANAf l :1;
qi ri Application filed February Serial lifoili55 78l. I I Q i v I This invention relates to well tools or wrenches, and more particularly to a tool especially designed for use in removing sections of oil well casings. V
The primary object ofthe inventionis to provide a toolof this character which may be lowered into a section of a well casing and operated to securely grip the section and rotate the section disconnecting it from its ad- 1 jacent section so that it may be readilyv and easily lifted from the well.
Another important object of the invention is to provide a tool of this character which may be operated to rotate the section of the well casing ,to be removed, in a right hand direction or a left hand direction according to the type of threads formed on the section to be removed;
With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in ,the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention hereinafter described and claimed, may be made within the scope of what is claimed, without departing from the spirit of the invention.
Referring to the drawing: 7
Figure 1 is a plan View of a tool constructed in accordance with the invention.
Figure 2 is a vertical sectional view through a section of a well casing, thebody portion of the tool being shown in section, one of the stops being cut away.
Figure 3 is a sectional View taken on line 3--3 of Figure 2.
Figure 4 is a transverse sectional view through the device illustrating the jaws of the tool reversed for a left hand operation.
Referring to the drawing in detail, the tool includes a body portion 5 formed with a circular bore disposed through the central portion thereof, there being provided an inwardly disposed flange 6 at the'base of the bore and forming a part of the body portion.
The body portion 5 is formed with lateral cut out portions 7 provided with reduced portions 8 that extend to the central bore of the portion, the out'portions being '"de- I i signed to receive the "laterally movable dogs orjaws'Q- As shown,t hese dogs a're provided 'withinwardly extended portions 10 that move through" the reduced portions; 8 of thecut out portions 7 the portions 10 being formed with recesses 11in theirupper and lower sur- "faces to accommodate thereduc'ed ends' l2of the'screws 13-. These screws 13 passthrough threaded openings in the body portion and act toflhold the dogs against dis 'wit-h respect to the'body portion 1 Y Due to the construction of'the cut outper- *tions 7 shoulders 14 are provided against which'the dogsmove when the dcgs are in their retracted positions to the endfthat the tool may be dropped into thewellcasin'gmo. be removed. Adjacent to the cutout porftions 7 and communicating --therewi,th, are bores 15 disposedon opposite'sidesof thereduced portions 8 and are designedto accom modate the coiled springs lo which have their-inner ends-engaging the'bases of the bores, While. the outer ends thereoffengage the dogs associated therewith, the springs being of the expan'sible type to normally urge thedogelaterally; 1 l l -Teeth indicated at 171 are formed onthe dogs and are inclined-towards one ofthe 'edgestl1ereof,but owing-to the factthat the body p'ortioirisprovided with out out-.p'orplacement tions in its' four sides, itowill befseen that these dogs may be removedand reversed and positioned" incut out portions'at the opposite I sides of :the body portion 'to the end that the tool maybe used: in ia'reverse direct-ion I'to unscrewthe'well casing-section if'the sec- "tion's are secured by a coupling having a left hand thread.
- Stops' in dicat'ed by the reference character 18 extend upwardly from the upper surface of the body portion and are adapted to cooperate with stops 19 extending laterally from the mandrel 20, to limit the rotary movement of the mandrel when the tool is beingpositioned for operation.-
The mandrel is formedwith a shoulder 21 formed by the reduced portion 22 which is threaded to receive the nut 23 so that the mandrel may be readily and easily positioned within the body ortion, or removed therefrom. Thus it W111 be seen thatthe contact of the shoulder 21 withthe' flange 6 provides a support for the mandrel and permits the mandrel to rotate within the body portion.
As clearly shown by Figure 3 of the drawa ing the mandrel is provided with a section 24: substantially oval in cross section provid ing a cam to engage the inner ends of the inwardly extended portions 10 of the dogs to force the dogs outwardly into engagement with'the well casing section to be removed. At the upper end of the mandrel is athreaded bore 25 having threads of the right hand type, which threads cooperate with the threads26oi the rod 27 so that the tool may i r be turned to the right while in'operation,
but should it be desired to turn the tool to theileft, or in an anti-clockwise direction a rod having an internal threaded extremity I may be positioned over the threads 28 which are of'the left hand type, forunscrewing sections of a well casing held together by a coupling having lefthand threads.
In the use of the tool, the tool is forced i intogvthewell oasingto be removed, and the mandrel is rotated to force the dogs laterally nto close engagement w th the inner surface of the well caslng, whereupon "a further rotary movement of the wrench will act to V unscrew the section of the casing where it maybe lifted from the well. I a
I claim: J
A tool for removing well casing sections, comprising a body portion having a central circular opening and having lateral openings communicating with'the central opening, gripping jaws, extensions on the jaws and fitted in the lateral openings, means for.
normally moving the'jawsflaterally, a mandrel extended through the jcentral opening,
said mandrel being oval in cross section andada ated to engage the extens ons ofthe aws 1 to iorce the jaws laterally, stops extending upwardly from the upper surface of the bodyportion, atopposite sides of the cen-" tral opening, stops extending laterally from the mandrel andadapted to engage the. first mentioned stops to restrictmovement ofthe mandrel, an'd meansforlimiting outward movement of the jaws. V r
7 In testimony that I claim the foregoing as m own Ihave hereto aifixed m si naa I a:
ture. V j V v i 1 ARTHUR P. ORTOLON.