US1433624A - Pipe grip - Google Patents

Description

C. A. JOHNSTON.

PIPE GRIP.

APPLICATION FILED SEPT. I4. 1921.

Patented Oct. 31, 1922.

Patented Oct. 31, 1922.

UNITED STATES PATENT OFFICE.

PIPE GRIP.

Application filed September 14, 1921. Serial No. 501,545.

To all whom it may concern:

Be it known that I CARLTON A. JOHN- STON, a citizen of the Uiiited States, residing at New Rockford, in the county of Eddy and State of North Dakota, have invented certain new and useful Improvements in Pipe Grips, of which the following is a specification, reference being had to the accompanying drawin s This invention re lates to devices for use in drilling wells, and particularly to a pipe gripping member adapted to be used for supporting strings of pipe in well drilling operations, as for instance when a new section of pipe is to be screwed into a lower section of pipe.

The general object of the invention is to provide a very simple, strong and effective pipe grip which maybe readily gripped around a pipe, and which, when gripped around a pipe, will fit the same firmly and prevent any downward movement of the pipe.

A further object is to provide a device of this character formed in two sections detachably engaged with each other so that the sections, which constitute jaws, may be opened for placing around the pipe and then closed to secure gripping engagement with the pipe, the pipe grip being of such character that when it is tilted it will bind upon the pipe and when it is disposed in a plane atright angles to the pipe it will not bind thereon but may be slipped up and down on the ipe.

y invention isiillustrated in the accompanying drawings, wherein Figure 1 is a top plan view of a pipe gripping memberconstructed in accordance with my invention;

Figure 2 is a side elevation of the construction shown in Figure 1;

Figure 3 is a top plan view of a modified form of the pipegripping member;

Figure 4 is a detail sectional view of the blade 26. j

Referring to these drawings, it will be seen that the pipe grip comprises a body portion formed of two jaw members 10 and 10, these members being detachably engaged orpivoted to each other, as will be later described, and when together being circular in plan to define a central aperture 11. The body 10 is formed with two oppositely disposed, protuberant portions 12 and 13 constituting ears, and a protuberant portion which is perforated, as at 15. The section 10 is formed with an ear 16 apertured for the reception of the shackle hook 17. The ears 12 and'13 are disposed belowthe outer face of the section 10, thus providing shoulders 18, and detachably engaged with. the. car 12, as by the pin 25, is the section 10, the pin 25 constituting, when desired, a pivot upon which the two sections or jaws 10 and 10 mayswing to open or closed position. This section is formed with a semicircular recess 22 on one face. The opposite end of this jaw section 10 is perforated for the passage of a screw or pin 20. Mounted upon the outer face of this section 10 is the semi-circular blade 26, the inner edge of which is beveled to form a knife edge 27, this blade being held in place by screws 28. The opposite face of the section 10 is also provided with a semi-circular blade 29 held in place by screws or other suitable means, the inner edge of this blade being also beveled.

It will be seen from Figure 1 that these blades are set so that the inner margins or edges project beyond the opening 22 so that the distance between the cutting edges of these blades 26 and 29 is less than the diameter of the opening 22. The shackle 17 affords a convenient means of supporting this pipe grip when out of use or when lowering pipe into a well, and the aperture 15 permits of a hook, cable or other handling device being applied to the opposite side of the pipe grip when lowering pipe into a well.

In use, the jaw 10 is opened, a pipe inserted through the opening 22, and after the pipe grip has been shifted upon the pipe to anyextent desired, the jaw 10* is closed and fastened by means of the pin 20. It is to be understood that the pin 25 is also detachable so that the two sections or jaws 10 and 10 may be entirely disengaged from each other for placing in position around the pipe and afterwards engaged by means of the pins 20 and 25, or that either pin 20 or 25 may be removed and the other pin used as the pivot upon which. the jaw main may be raised, lowered or supported in any desired position.

In Figure 3, I show a slight modification of the construction illustrated in Figure 1.,

wherein there is an annular body 30, tothe opposite faces of which are attached ,the blades 81 and'32, these blades being such have been heretofore described, the blades being fastened'in place by the screws 33. Thisbody 80 is providedwith the oppositely disposed ears 3e and 35, to oneof which ears the shackle 36 is connected, This'constr'uction operates in the same manner as the construction illustrated in Figure 1, except that it does not open. c I

In both the constructions illustrated in Figure land that illustratedin Figure 3 I have provided a body having a circular aperture and having semi-circular blades attached onopposite faces of the body and confronting each other. In one case, ;ho wever, the body is formed'in two sections; In the other case,.-the'body is formed in one section. j

One of the advantages of the constructionshown in Figure 1, is that it is designed to open and look around a pipewith a pin such as shown at 20, so that it cian'betaken oil at any time without being; slippeduover the end of the pipe. For instance the j aws may be opened to embrace that portion of the pipe projecting out of the well andthen the aws may be closed and the pin 20 may be inserted. The pipe grip may then be lowered into the well to any desired point, a flexibleconnectionbeing attached to the ear 14: and to the shackle 17 so, that the pipe grip may besupported in. a plane at right angles tov the. axis of the pipe. After the pipe grip has been lowered to a suitable degree, cable may beconnected to the shackle 17 by meansof a block andtackle, for the purpose oflifting the pipe out the well. It will be noted that the blades 26 and 29 are disposed on opposite faces ofthe body of the grip, so that when the cable is tightened, the grip will tilt, and inasmuch as the blades are on oppositesides of the body, their biting edges will. securely bite into the pipe, making it impossible for the grip to slip,,then the pipe may be raised. When the cable is loosened, the grip will slide down upon the pipe, in orderthatthe grip may take another hold, the cable may then be again tightened, and the pipafurther lifted from the well. Both pinsQO and 25 are for the purpose of holding the jaws detachably engaged with each other. In

case a pipe is lost in the well, a cable may be connected to the shackle 17, and a wire fastened in the opening 15 of the lug 14, and with the two jaws in the positions shown in Figure l, the grip may be lowered into the well, and manipulated "untilthe end of the pipe passes between the jaws, then the wire v(not shown) which connects to the lug 14:, may be slackened and the cable (not shown) tightened, in which case the grip will bite into the pipe, whereby it may be raised lrom'the well. In other words the lug 14 is for the purpose of lowering the grip into a small curb well for catching a lost pipe. Alsothe grip may be used for lowering and liftingpipesin a well. 7 I

1.. A pipe grip of the character described comprising a body having opposite poi tio'ns defining a central, circular aperture, a semi-circular blade having a cutting edge disposed upon one face of thebody, thecutting edge projecting slightly beyond the aperture, a semi-circular blade applied to the opposite face of thebody and projecting slightly beyond the aperture on the opposite side from the first named blade. 4 i

2. A pipe grip of the character described comprising two semi-circular'jaws, saidjaws defining manual aperture, a semi-circular blade. attached to one face of one of the jaws and having its inner edge beveled and projecting beyondthe wall ofthe aperture, a semi-circular bladecarried by. the other jaw and disposed on the face of the jaw ope posite to the face of the firstnamed jaw having' the blade thereon, said second named blade projecting inward beyond the circular aperture, and means for holding the jaws in operative position.

3. .p pegrip of the cliaracted described comprising-abody having two semi-circular v jaws together defining a circular opening, a semi-circular blade attached to one face of one of the jaws and projecting beyond the opening, .a semi-circular blade attachedto the opposite face of the other jaw and pro- A,

jecting beyond the opening, theopposite endsofthe jaws having aligning perforation s,and pins insertible through said perforations to hold thejaws in locked engagement with each other, one of the jaws being adapted for engagement with a flexible connection. r

4.; A pipe grip of the character described comprising a body formed of two opposed,

semi-circular jaws'together defining a c rcular opening, a semi-circular blade attached to one face ofone of the jaws and projecting beyond the opening, a semi-circular blade attached to. the opposite face of the other jaw and projecting beyondthe openthe jaws-toeach other, and a'pin detachably engaging the other ends of both jaws .ing, a pin pivotally connecting like ends of from the first named pin and holding the opposite faces of the body and confronting jaws in locked engagement with. each other, each other and projecting slightly beyond each of said jaws having a laterallyprothe-aperture, and a shackle attached to the 10 jecting, perforated lug. body. I

5. A. pipe grip of the character described In testimony whereof I hereunto my comprising a body formed With a central signature. aperture, semi-circular blades disposed upon CARLTON A. JOHNSTON.

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