US2558374A

US2558374A - Impact type sucker rod wrench

Info

Publication number: US2558374A
Application number: US19604A
Authority: US
Inventors: Carl E Olsen; Joseph A Peterson
Original assignee: GEARENCH Manufacturing CO
Current assignee: GEARENCH Manufacturing Co
Priority date: 1948-04-07
Filing date: 1948-04-07
Publication date: 1951-06-26
Anticipated expiration: 1968-06-26

Description

June 26,- 1951 Q E OLSEN ETAL 2,558,374

IMPACT TYPE SUCKER RGD WRENCH Filed April 7, 1948 FIG 2. FIG FIG.3

Inventors 42@ 229/@ 29 CARL E, oLsEN 43 42" J. ARVID PETERSON FIG. 5.

Aorneys wwwa.

Patented June 26, `-1951 UNITED 'STATES PATENT oF-Ficr.

IMPACT TYPE SUCKER ROD WRENCH Carl E. Olsen and Joseph A. Peterson, Houston, Tex., assignors to Gearench Mfg. Co., Houston, Tex., a corporation of Texas Application April 7, 1948, Serial No. 19,604

8 Claims. 1

Our invention relates to wrenches, and more particularly wrenches for use in joining sucker rods in oil wells, the latter of which are. in threaded connection with one another, or connected through a threaded nipple.

An obj ect of our invention to provide a sucker rod wrench which isv eective in setting up, and breaking the joints of sucker rods used in oil wells` and the like..

Another object of our invention is to provide a sucker rod wrench having an adjustable jaw to fit various sizes of wrench receiving: portions on sucker rods and couplings.

A further object of our invention is to provide a sucker rod wrench having an impact delivering handle secured in the head; by meansv of a pin in combination with means to hold the head1 of the wrench in alignment with the handle when the wrench` is being placed in operative position.

Still another object of our invention is to provide a. sucker rod wrench with the head pivoted to the handle at a` point that gives effective. hammer action upon the head without jarring the operators hands. p

A still further object of our invention is to provide a sucker rod wrench with jaw ends and handle so shaped that the wrench is easily slipped on or oli the wrench receiving portion of the rods or couplings.

Still further objects: and the entire scope of applicability of the present invention will become apparent from the detailed description given hereinafter; it should be understood,V however', that the detailed description and specic example is given by way of illustration only and, while indicating the preferred embodiment of the invention, is not gi-ven` b-y way of limitation,y since various changes and modiiications within the spirit and scope of the invention will become apparent to those skilled in the. art from. this detailed description.

In the drawing, p

Fig. 1 is a side elevation of a Wrench constructed in accordance with our invention;

Fig. 2 is an end View of the wrench shown in Fig. 1;

Fig. 3 is a side view in part section of the head` and upper portion of the handle showing the handle positioned with respect to the head to allow the hammer portion on the handle to be out of contact with the cooperating anvil portion on the head, so as to permit hammer blows to be delivered to the head Fig. 4 is a side View partially in elevation. and partially in section with the hammer portion on 2 the handle in contact. with" the anvil portion on the hea-d;

Fig. 5A is a section taken. along line 5--5 ol'. Figure 1.;

Fig. 6 is a view ofthe: top of the adjustable outer jawV on the section line. 6--6 of. Fig. 3;

Fig. 7 shows a modified form. of handle end. in the form of around knob ;v and Fig. 8. isy av section taken along line 8.-8 of Figure 4 showing the pivot bushing mounting in the head.l

Referring to the` drawing' more in detail. a. wrench is generally designated at Il!v4 hav-ing a head. III' and. an. elongated. handle generally inkdicated at l2.

The lower approximate one half. or hand. gripping` portion l'3Y of the` handlel extends ina longitudinal direction while the upper portion of the handle is curved` gradually outward orV to the right as at'V l5? and; terminates in a generally longitudinally extending, upper, oiTset end portion i6 which has. a bifurcated end H.

The bifurcated end IT extends partly in the longitudinal direction. of` the: handle and at*I its outer' end. portion fl istransverse to the` direction of the handleV and opposite to the onset portion I6. The inner faces of. the bifurcations form inthe handlel a head. receiving slot with. a rear wall I8: of arcuate shape so: positioned. that7 the p slot has its greatest depth atY its upper end.. Just below the lower end of thev bifurcations there is formedv on the handle a hammer portion t9 which cooperates with an anvil 28 on the head described later.

The handle I2 is I-shaped. in cross section, having an outer ribportion 20 and an inner rib portion 2li. The hammer portion t9.y isformedina somewhat thickened( portion of, the inner rib 2l. The lower end of the handle. terminates. in a somewhat cylindrical knob 22. formed by the rib and4 is apertured. at. 2`Z"..

A spring and plunger receiving recess 23 in the formv of a cylindricalbore extending` inthe longitudinal. direction. of the handle is formed in the oiiset handle portion I6', as best. shown in Fig. 4l

The upper and inner portion of this recess 23" is" cut away as at 23 while the remaining portion 23. forms a shoulder extension. of the recess. The cut-away portion4 atv 23.' joins with the` upper end of. the arcuate. shapedwall I8 and forms` a space within which a lug on the headv described later may have movement.y

A. hammer` portion 2,14 is formed, inthe odset handle` portion, t6 as a thickened. portion oi the outer web` 20, at; this point of` the webs` extension,

' the upper end of the spring may press.

This hammer portion on the handle extends in the general longitudinal direction of the handle.

A transverse rib 25 extends from about the middle of the inner rib 2I of the handle and terminates in a at upper surface which is in alignment with the lower end of the hammer portion I9 on the handle. The outer edge 25 of the rib 25 is in alignment with'the face of the inner fixed Vjaw of the head,- described later, so that the wrench may be easily slipped on and off the wrench receiving portion of a sucker rod or coupling.

In Figure 1 there is shown a modified form of lower end for the handle which is in the form of a spherical knob 26.

The head `II is formed with a hooked-shaped jaw indicated generally at 21 extending toward the lower portion of the handle and having a fixed inner jaw 28 and an adjustably mounted outer jaw 29, see Fig. 4. Head II is transversely apertured at 30 with the axis of the aperture extending at a right angle to the longitudinal axis X-X, 'see Fig. 1, which extends substantially mid-way between the

jaws

28 and 29. .A bushing 3| is inserted in the aperture 3D and forms a pivotal bearing for a securing pin or rivet 32 which extends through suitable transverse apertures in the bifurcated end I1 of the handle. In Figure 8, there is best shown the mounting of this bushing 3l which is longer than the width of the head II. The ends of the bushing, indicated at3I' and 3l, extend beyond the adjacent sides of the head I I and have a bearing fit against the adjacent, inner faces of the bifurcated end I1'. This assembly of the bushing, as just described, prevents the bifurcated ends I1 from being bent or forced towards each other when the 'wrench is being transported and knocked against other tools and thus removes the danger of these bifurcatecl ends binding against movement of the head.

The head II is further formed with a rearwardly extending rib 33 having a rear edge 33 of arcuate shape which extends into the bifurcated end of the handle. The arcuate shaped rear edge 33 is positioned in adjacent spaced relationship to the arcuate shaped wall I8 of the 4slot in the handle. There is a slight clearance between the wall I8 of the handle and the edge 33 of the head permitting the handle to have an oscillating movement with respect tothe pivotally -mounted head II. A rearwardly ex- Y tending lug 34 having a contact face 34 is formed in the upper rear portion of the rib 33.

f A longitudinal coil spring 35 is mounted within the spring and plunger receiving recess 23 in the handle and interposed within the recess 23 between the upper end of the spring 35 and the contact surface 34 of the lug 34 is a cylindrical plunger 36. Y The plunger 36 is formed with a reduced cylindrical lower portion 36 thereby forming a shoulder 36" at the junction of the two cylindrical plunger portions against which Thus, the spring pressed plunger 36 urges the head to rotate about its pivotal mounting in a counter-clockwise direction. l

Referring to Figure 3, there is best shown the action of the impact delivering handle I2 with respect to the head I I and thecooperating movement of the spring pressed plunger 36. The handle I2 is shown in its extreme open position with respect to the head I I and hammer surface I9 on the Yhandle is at its farthest position from' 4 swinging the handle in a clockwise direction, a hard blow will be struck by the hammer surface I9 on the anvil 28" of the head which is assumed to be mounted on the squared portion of a sucker rod (not shown). The lower end of the reduced shank36' of the plunger 36 strikes the bottom of the recess 23, thereby limiting the swing of the handle. Spring 35 is so proportioned that it is not compressed beyond its effective limit when the handle is wide open, thus its effectiveness is retained to urge the head I I into normal or closed position with respect to the handle. The upper end of the arcuate surface I8 on the handle, as indicated at 23', is in spaced relationship with the fact 34 of the lug on the head II when the handle is at its extreme open position. This latter arrangement of the surface 23 prevents it from becoming hammered or deranged and insures that the plunger 3,6 is free to move inthe recess 23.

The inner xed jaw 28 on the head has a longitudinally extending face 28 which is in alignment with the outer edge 25 of the rib 25 on the handle. The end surface of the jaw 28 is in spaced relation to the upper end or face of the rib 25 on the handle.

An anvil 28 is formed on the lower end of the jaw 28 on the opposite side to the vjaw face 28 and parallel thereto. The anvil 28" is so positioned that the hammer I9 on the handle may strike against it when the handle is oscillated about the head. The spring pressed plunger 36 by pressing against the lug 34, urges the anvil 28" andthe hammer I9 into contact when the head is in normal position.

The spring 35 holds the jaw 21 of the head IIV in normal or closed position, as shown in Figures l and 4, to make it easier for the operator to put on or take oif the wrench. However, the spring 35 is not strong enough to prevent a smooth back-up action when this sucker rod wrench is used to bump up or break the joints.

The use and mounting of the adjustably mounted, outer jaw 29 will now be described. This outer jaw is so formed and mounted that its different jaw faces may be brought into position opposite to the xed inner jaw, thus permitting various different spacing to be obtained between the jaw faces. This feature permits this wrench to be used on various different sizes of wrench receiving portions on sucker rod joints or nipple connections. In the structure here shown, two faces 29' and 29, on adjustably mounted outer jaw 29, may be brought into respective positions opposite to jaw face V28 on xed jaw 28, permitting this wrench to be used on two different sizes of sucker rod squared portions. It is within the scope of the invention to so position the remaining faces of the adjustably mounted outer jaw 29 with respect to the axis of the jaw that the wrench may be used on other sizes of sucker rod squared portions. In such a case, it would be necessary to add additional detent recesses, similar to those shown at 42' and 42 in Figure 6 in the top face of the rotatably mounted outer jaw 29. Further, it is to be understood that the outer adjustable jaw may be 'formed of other polygonal shapes having more faces at'various spacings from the axis of said jaw and thus providing many different spacings Vwith the xed jaw face to t many sizes of sucker rods.

The head/.II mounting post 31 depending from the outer lower portion ofthe head. The pivot portion 31 and the head are apertured at 31', see Fig. 4, and thishas formed thereon a pivot i 'n....N

fastener aperture is threaded to receive a securing cap screw 38. The head is slotted at 39 above the aperture 3l to receive a locking nut 4|] which is screwed onto the threaded upper end of the cap screw 38. A bore hole 3'1" extends `in the head Il in alignment with the aperture 31 facilitating the machining and fabrication of the head.

The multi-faced, eccentrically and axially adjustably mounted outer jaw 29 is formed with a longitudinally extending aperture 4I, the axis of which is offset from the longitudinal central axis of that jaw. The upper end of the aperture 4| is counter-bored at 4I so as to form an adjustable mounting for the outer jaw 29 about the pivot post 31 on the head. The lower end of the aperture 4I is counter-bored at 4I `to receive the head 38' of the securing cap screw. This cap screw head 39' is formed with a wrench receiving portion 38 therein to permit the assembly of the cap screw in the head. The faces as at 29 and 29 of the outer jaw 29 are so formed that when in operative position opposite to the face 28 on the fixed jaw 28, they are parallel thereto. Thus, byfadjusting the outer jaw 29, either face 29 or 29 may be brought into operative position. It will ybe noted that due to the offset position of the pivoted aperture 4I, extending through the outer jaw 29, that various spacings between the jaw faces are obtained which permit this wrench to be used on various sizes of Wrench receiving squared portions on `sucker rods or nipple couplings.

In Figures 5 and 6, there is shown detent means for holding the adjustably mounted outer jaw in selected positions. Fig. 5 is a view along the section line 5-5 in Fig. l and shows the lower surface of the head portion which mounts the outer jaw 29. A ball 42 is suitably mounted Within a socket extending into the head face 43. Within the socket there is mounted a spring (not shown) which presses against the ball 42 to urge it to extend outward beyond the surface face 43. Fig. 6 is a view along the section line 6-6 of Figure 3 showing the upper face of the outer jaw 29. Within two opposite corners of the face at 42 and 42 there are formed semi-spherical indentations which cooperate With the spring pressed ball 42 to hold the adjustably mounted outer jaw 29 in a selected position of adjustment.

Referring now to Figure 1, it Will be noted that the contacting surfaces of the hammer I9 and the anvil 28 lie substantially in line with the longitudinal axis through the hand gripping or lower portion I3 of the handle I2. It will further be noted that the axis of the pivot mounting pin or rivet 32 lies slightly to the left of said longitudinal axis through the hand gripping or lower portion I3 of the handle I2. This arrangement (of parts has been found to give a pivotal mounting of the handle in the head and an anvil and hammer contact that renders the wrench effective without jarring the operators hand. The arrangement and proportioning of the parts provides a wrench that has such weight distribution that it has good balance on or off the job.

In using this sucker rod Wrench, the adjustably mounted outer jaw 29 is first adjusted so as to provide the proper spacing between the jaw faces to t the squared portion of the sucker rod or nipple on which it is to be used.

In its normal or closed position, the spring 35 urges the plunger 36 against lug 34 on the wrench head II, thus causing the anvil portion 28" on the head to be in contact with the hammer portion I9 on the handle. In such a normal posi- 6. tion, the head is held steady with respect to the handle so that by grasping the handle of the wrench with only one hand, its jaw may be easily slid onto the squared lportion `of the sucker rod. To further assist in sliding the wrench jaw onto such squared portion, the ribbed `portion 25 is provided having the outer edge 25 in alignment with the inner face 28 of the fixed jaw 23. As the wrench is brought into position, the rib surface 25 bears against one face of the squared `portion on a sucker rod and Yfrom that position,

the wrench is slid in the direction of the handle, bringing the jaw 21 into operating position on the squared portion of the sucker rod.

The wrench is applied to the sucker rod in such a position that its hammer action may be brought into play either to loosen or tighten a joint. Referring to Figure 4, the wrench is shown in closed position with the spring 35 urging the plunger against the lug 34 on the head II. Figure 3 shows the handle I2 rotated counterclockwise to its extreme open position with the reduced shank portion 36 on the plunger 36 striking against the bottom of its f housing recess 23. By swinging the handle from its position in Figure 3 in a clockwise direction, a hammer blow will be struck -by the hammer portion I9 on the handle against the anvil portion 28 on the head which is assumed to be mounted on a squared portion of a sucker rod. This hammer action may be repeated in a rapid manner by merely oscillating the handle I2 to open and closed position with respect to the head to tighten a joint or to loosen a set up joint.

We Claim;

l. A wrench comprising a head member and an impact delivering handle member, `said head member having a jaw, and an anvil, said jaw having a fixed inner jaw portion and a multifaced, eccentrically and axially adjustably mounted outer jaw portion whereby a plurality of different spacings are obtained between the face of said ixed inner jaw portion and the faces on said outer jaw when said outer jaw portion is adjusted, said handle member having an oiset end comprising a bifurcated end portion to receive said head member, and a hammer portion to strike against said anvil, and a retaining pin disposed transversely through said head member and said bifurcated end portion of the handle member, the axis of said retaining pin -being disposed transversely to said bifurcated end portion and at a right angle to the jaw axis extending substantially midway between said oppositely positioned jaw faces.

2. A wrench of the character described in claim l wherein said head member includes a pivot mounting post for adjustably mounting said outer jawportion, said pivot mounting post on the head having a longitudinally threaded opening for receiving a securing cap screw, said adjustably mounted outer jaw portion having a longitudinally extending opening eccentrically located therein and counterbored at its upper end to receive said pivot mounting post and the securing cap screw extending through said longitudinal opening in said outer jaw portion and screwed into said threaded portion in said. pivot post, whereby said outer jaw portion is adjustably mounted.

3. A wrench comprising a head member and an import delivering handle member, said head member having a jaw, and an anvil, said jaw having a fixed inner jaw portion and a multi-faced,

eccentrically and axially adjustably` mounted .outer jaw'-portionwhereby a plurality ofdifferent spacings are obtained between the face of said iixed innerjawVv portion and the faces on said outer jaw when said outer jaw portion is adjusted, said handle member having an oifset end comprising a bifurcated end portion Vto receive said head member, and a hammer portion to strike against said anvil, a retaining pin disposed transversely through said head member and said bifurcated end portion of the handle member. the axis of said retaining pin being disposed transversely to said bifurcated end portion and at a right angle to the jaw axis which extends substantially midway between said jaw faces on said head,'and resilient means to normally hold said anvil against said hammer portion on said handle. j

4. A wrench comprising a head member and an impact delivering handle member, said head member having a jaw, an anvil, and a rearwardly extending rib formed with an arcuate rear edge terminating at its upper portion in a rearwardly extending lug, said handle member having an offset end comprising a bifurcated end portion forming a slot with an arcuately shaped rear wall to receive said head, a resilient means receiving recess, and a hammer portion'to strike against said anvil, a retaining pin disposed transversely throughsaid head member and said bifurcated end portion of the handle member, the axis of said retaining pin being disposed transversely to said bifurcated end portion and at a I right angle-to rthe jaw axis extending substantially midway between the faces of .said jaw on said head, and resilient means disposed within said resilient means receiving recess in the han-V dle and pressing against said lug on the head whereby said anvil is urged against said hammer portion on the handle.

' 5. A wrench for coupling and uncoupling sucker Vrod joints comprising a head member and an impact delivering handle member; said head member having a jaw opening towards said handle comprising a xed inner jaw and a multifaced, eccentrically and axially adjustably mounted outer jaw whereby a plurality of different spacings are obtained between the face ofV VVsaid fixed inner jaw and the faces on said outer jaw when said'outer jaw is adjusted, an anvil positioned at the outerY end of said inner jaw and having a face parallel to the face of said inner jaw, a rearwardly Vextending rib having an arcuate rear edge extending from said anvil face upward to a rearwardly extending lug portion on anvil on the head, a second hammerportionpositioned on the opposite side to said bifurcated end and extending inra direction substantially parallel to the longitudinalaxis of the handle, -andV a rib on said handle position below said anvil portion having its outer edge in alignment with the face of said inner jaw on the head when said rst hammer portion is against said anvil'` portion whereby the wrench may be easily slipped on and oilV suckerV rods; a retaining pindisposed transversely through'said head member and said bifurcated Vend portion of the handle,

6. A wrench of the character described in claiml 5 wherein said head and said pivotally mounted outer jaw are provided with cooperating detent means to hold said outer jaw in a selected adjusted position to present one of said plurality of jaw faces opposite to said face on the fixed inner jaw on thehead. Y

7. A wrench of the character described in claim 6 wherein said head is apertured to receive a bushing for said retaining pin and a bushing is mounted in said bushing receiving aperture in the head.

8. A wrench of the character described in claim 6 wherein the face of said rst hammer portion on the handle and the face of said anvil on the head when in contacting position lie substantially in the longitudinal axis of the hand gripping portion of said handle and the axis of said Y retaining pin lies to the opposite side of said longitudinal axis of the handle from said oiTset end portion of the handle.

CARL E. OLSEN. JOSEPH A. PETERSON.

REFERENCES CITED The following references are of record in the le of this patent: Y

Name VDate Y 1,018,528 SudldarthV Feb. 27, 1912 1,055,971 Ferguson Mar. 11, 1913 1,129,966 Ehrhard; Mar. 2, 1915 1,722,652 ArcherV July 30, 1929 1,863,378 Meeks June 14, 1932 V2,069,976 Sehon Feb. 9, 1937 Y 2,179,396 Barrington Nov. 7, 1939 2,219,421 .Jones Oct. 29, 1940 2,373,054v Rudrow et al. Apr. f3, 1945