US2044483A - Pull rod jack - Google Patents

Description

c. NEHER PULL ROD JACK June 16, 1936.

Filed Feb. 7, 1956 2 Sheets-Sheet l JW QIZM' fiikr Jr,

C. NEHER PULL ROD JACK June 16, 1936.

Filed Feb. '7, 1936 2 Sheets-Sheet 2 Patented June 16, 1936 UN ETED STATES PATENT eerie];

poration of Illinois- Application February 7, 1936', Serial No. 62,793

14'Claims.

This invention relates to improvements in pull rod jacks and it consists of the matters hereinafter described and more particularly pointed I out in the appended claims.

One of the objects of the present invention is to provide a jack whereby the separated sections of a broken pull rod, such as employed in pumping oil wells, may be drawn together, to permi't making the necessary connection therebe- Another object of the invention is to provide a jack of this kind, the parts of which may be laterally applied to and removed from the respective sections of the pull rod, and which not a only holds the sections without slippage, while connecting the ends thereof, but also provides ample room to manipulate tools and. other devices used in so connecting said ends;

Still another object of the invention is to pro- 20 vide a-jack of this kind; wherein the sections of a broken pull rodare drawn together by means of a jacking mechanism and inextensible members such as chains; the'jack as a whole including of the load, when manipulating the mechanism in taking a new bite or grip on saidniembers;

Still a further object of the" invention is to ing the preferred form of the invention. shown as applied to the spaced sections of abroken pull rod; u Fig. 2 is a planview of the jackon an enlarged scale? H Fig. 3 isatransverse vertical sectional view through a part of the jack as taken on the line 3'-3 0f Fig; 2

Fig. 4 is another transverse vertical sectional view through the part of the jackas taken on" the line 44 of Fig. 2; V

Fig. 5 is a further transverse-vertical sectional view'through apart-of the jack asta-k'en" on the line 55'of Fig-3;

Fig. 6 is a longitudinal: detail vertical" sectional" view through a part of the jack a's'takenon'the" line li -'6 01 Fig. 3;

v means for holding said members under tension Fig. '7 is another longitudinal detail vertical sectional view through a part of the jack as taken on the line l! of Fig. 4; and

Fig. 8' is a further longitudinal detail vertical sectional view through another part of the jack as taken onthe line 88 of Fig. 5. p

The invention is herein illustrated and will herein be described as employed in connection with the spaced sections of a broken oil well pull rod, so as to pull or draw said sections toward each other and hold them in a position wherein they may be connected. It is to be understood, however,- that the invention is not to be restricted to a use in connection with broken pull rods because it may also be used for other purposes where its peculiar characteristics make it of advantage to do so.

Referring now indetail to that embodiment of v the invention, illustrated in the drawings, l0 and H indicate the longitudinally separated sections of a broken oil well pull rod. The improved jack for drawing said sections toward'each other to permit connecting them includes a chuck-like collar I Z adapted to be secured to one. rod sectionl It further includes a jacking mechanism I3- adapted to be secured to the other rod sections, and one or more inextensible members M between said collar and said mechanism for imposing the pull of said mechanism upon said collar. As shown herein said members are in' the form of chains:

The collar l2 is intended'for application toand removal fromits associated rod section Ill. laterally or from one side thereof. It includes a pair ofsubstantially semi-circular, top and bottom collar parts I5'and l6 respectively. The bottom collar par't" l'i iis'provided wi'th pairs of mtg-min, nally spaced ears [7-H and the collar" part l5 has' ears I8 for engagement between the ears of the pairs |1- |1. A pin 19' extends through one set of ears H and I Bres'pect'iVeIy, to provide a pivot whereby the collar part 5 maybe swung into open andclosed positions with respect to the collar part I 6 A pin 20 is removablyinserted through other setof ears Hand [8 to lock the two collar parts it" collarforrriing position. The collar part l6 has a pair of lateral extensions Z TIQZI each to receive an eye 22. One end of each chain issecuredto anassociated eye 22.

The collar parts are formed'internally to pro vide abore that tapers in diameter in the direction" away from the end of the associated rod section as best appears in' Fig. 8. This bore is adapted to receive aplurality of complementally tapered gripping jaws 23. It is apparent that a pulling action on the collar l2 toward the end of its rod section, causes the jaws to firmly grip the rod section |0 without slippage. The gripping jaws 23 are provided at the rear end with radial flanges 24 and the flanges of said jaws are connected by links 25 to hold them together as a set.

The jacking mechanism includes a tubular housing 26 of substantially rectangular cross section. In said housing is a member 21 arranged for a longitudinal extensible and retractible movement. In this instance, said member is a rack bar with teeth on the top side thereof. Mounted for swinging movement in the housing is the actuating lever 28. The housing is provided with an enlargement 25 in which is the usual pawl and ratchet mechanism, whereby rocking movement of the lever produces a step-by-step movement of the member 21', longitudinal with respect to the associated rod section II. As the pawl and ratchet mechanism in said housing forms no particular part of the present invention, it is not believed necessary to illustrate and describe the same in detail herein. However, it is pointed out that said mechanism includes a suitable pawl trip and lock-out trigger 3!! whereby the rack bar may be moved toward the end of the pull rod section H in taking a new bite while operating the jack as a whole for its intended purpose.

The jack housing 26 is provided with means for applying it laterally and securing it to its rod section and such means is as follows:

On the bottom side of the front end of the housing is an enlargement 3| including pairs of laterally extending ears 3232. Associated with said enlargement is a semi-circular collar part 33 having an ear 34 at each end adapted for insertion between the ears of each pair of ears 32. A pin 35 passes through one set of said ears 3234 to pivotally connect the parts together. A pin 36 is insertable through the other set of ears 32--34, to lock them together. When the pin 36 is removed, the collar part 33 may be swung into an open position with respect to the housing enlargement.

The enlargement 3| and collar part 33 are formed to coact in providing a bore 31 which tapers toward the rear end of the housing. This bore is adapted to receive the tapered jaws 38 adapted to clamp upon the pull rod section II. These jaws 38 are similar to the jaws 23 before mentioned. At the rear end of the housing is a lug 39 which straddles the rod section II to support the associated end of the housing in the proper position with respect tosaid rod section. It is apparent that when the lever 28 is actuated to move the rack bar 2! rearwardly under load, the tendency is for the housing to move forwardly. This tendency, however, due to the provision of the jaws 38 causes the jaws more tightly to grip the rod section II to hold the housing against movement.

On the jack housing 26, rearwardly of the enlargement 3| are lateral extensions 40, each formed with a pair of upwardly facing, spaced lugs 4| to receive and hold certain links of the chains I4.

At the front end of the rack bar is a cross head 42. This cross head, which is removably secured to the rack bar as by the pin 43, includes laterally spaced, tubular sleeves 44 of such diameter as to permit the passage of the chains I4 therethrough. These sleeves are separated by a recess 45 for straddling the associated rod section. On the bottom of one sleeve is a finger 46 which extends toward but is short of the other housing to form a lateral bottom inlet 41 for the recess. The flnger 46 terminates in an upturned hook 48, all as best shown in Fig. 4.

On the rear end of each tubular sleeve of the cross head, is an upstanding fan shaped flange 49 having an arcuate slot 5|) therein made concentric with the axis of the sleeve. Associated with each flange is a fork-like wedge or chain engaging member 5| having a longitudinal slot 52 that opens through the bottom end thereof and has a lug 53 at its top end. In each member 5| between the slot 52 and lug 53 is an elongated opening 54. A bolt 55 extends through the opening 54, in said chain engaging member and through'the arcuate slot 50 in the flange 49. A spring 56 surrounds that end of the bolt beyond the flange 49 to resiliently hold the member 5| against the face of the flange. With the arrangement described, it is apparent that the member 5| may be moved in the direction of its length and into angular positions, which are substantially radial of the sleeve. The slot 52 in each member 5| is of a width to permit insertion of certain links of the chains, arranged edgewise therein, the next link being crosswise of the slot so as to abut against the chain retaining member.

When a pull rod, such as used in pumping an oil well breaks, the two sections thereof separate a considerable distance due to the load of the pumping plunger imposed upon one of the rod sections. In repairing a broken rod, the ends of the sections are usually headed over and then the rod sections are drawn toward each other to permit of the application of a suitable coupling to connect said sections.

The separation of said sections is often much greater than the length of the rack bar and the distance it can move through the jack housing. Therefore, it is preferable that the chains l4 be of a length greater than the rack bar or its movement. In practice, chains about 15 long are employed as this length is found to take care of the separation between sections of broken pull rods, in actual practice.

In applying the jack as a whole to a broken pull rod, the procedure is as follows:

The pin 20 of the chuck-like collar I2 is removed to permit the same to be opened. The jaws 23 are then applied to the rod section III and the collar is reapplied from one side of the rod section. The collar part I5 is then swung into closed position and the pin 20 reinserted to lockthe parts in position. If desired, the jaws may be tapped with a hammer to enter them into the bore of the collar and to grip the rod section tight enough to prevent movement of the collar on its rod section.

The pin 36 is now removed from the jack housing so that the part 33 may be swung into open position. The jaws 38 are then applied to the desired part of the rod section and the housing 26 is then applied to the top side of its rod section. The part 33 is then swung to its closed position and the pin 36 is reinserted to hold the jaws in place. These jaws may be tapped lightly into place so as to hold the housing in place upon its rod section.

The trigger 3|] of the jack mechanism may now be actuated to let the rack bar be slid forwardly or toward the other rod section to the limit of its extension. The cross head v42 after having been removed from the bar 21 is then applied to its associated rod section II by passing the rod through the entrance slot 41 into the recess 45. The cross head is then moved rearwardly into position on the bar and the pin 43 is reapplied tosecure the cross head to the bar. Thereafter the trigger 30 is operated to restore the parts so that when the lever 28 is actuated, the rack bar 2! is moved step-by-step in the other direction. The chain retainers 5| on the cross head are moved into such positions as to freely uncover the associated end of the sleeve 44, after which said chains are inserted through said sleeves from the front end. The chains M are then drawn substantially taut and the members 5l-are actuated to engage certain of the links edgewise in the slots 52 in said members.

When the lever 28 is actuated, this will move the bar 21 rearwardly and will tauten the chains at which time the actual pulling action starts. So soon as the pull starts, this causes the collar 1 l2- and the jack housing 26 to more tightly grip the associated rod sections. In the further operation of the lever, the rack bar moves rearwardly, exerting a pull on the chains [4 which draw the rod sections toward each other.

When the rack bar has been moved rearwardly toits limit, wherein the cross head 42 is in close proximity to the jack housing 26, portions of the chains to the rear of the cross head are engaged in the hooks 4i therefor on the lateral extensions 40 of the housing. This imposes the load of the rod section IO upon the housing so that said load is held against slipping, in a manner permitting manipulating the jack mechanism in the taking, of a new bite.

The retainers 5| on the cross head are moved upwardly and out of engagement with the associated chain links. The trigger 30 of the jacking mechanism isthen actuated to release the pawl mechanism of said jack mechanism after which the rack bar 21 with the cross head 42 thereon is slid forwardly toward the other rod section. The trigger is thereafter again actuated to render the pawl mechanism operative, after which the. retainers on the cross head are caused to engage certain links in the chain.

Thereafter the lever 2-8 is rocked back and forth. to move the rack bar step-by-step rearwardly. This pulls the rod section II] further toward the rod section II. When the rack bar has moved rearwardly an amount which provides slack in the chains between the head 42 and housing 26, the chains are released from the hooks 4] of the. extensions 40. After therack bar has been moved rearwardly to its limit, those parts of the chains I4 between the head and housing are manually drawn taut from the housing and applied to the hooks M which hold the load through. the chains. Thereafer the rack bar is moved forwardly for a new bite as before, should the same be necessary.

When the rod section parts are drawn toward each other to a point wherein a coupling member can be applied, the chains anchored in the hooks 4| as they are, hold the load when making the coupling. During the operation of drawing the rod sections together, the pull on the rodsection H causes that part of the same forwardly of the housing 26 so flex downwardly but this flexing. is limited by the engagement withthe finger 46 on the cross head. This keeps the rod section straight so that when the ends of the said section are brought into the desired position for coupling, they are substantially aligned- After the coupling has been made, thenext step is to remove the jack laterally from. the coupled rod. The pin 20 is removed to open upthe collar I2 to permit removal of the jaws 23. The pin 36 is removed topermit the part 33 to swing to open position and the jaws 38 removed; The pin 43 is withdrawn to permit the head 42 to be removed from the bar 21. Thereafter the jack mechanism may be lifted out of engagement with said rod section. H, the chains l4 having first been released from. the hooks 4|. The cross head is now moved laterally and then upwardly so that the rod passes through the entrance opening 47 in the head.

This, of course, completes the removal of the entire mechanism which is ready for use for the next operation. It is apparent that in describing the way in which the jack is removed from a coupled rod, certain sequences in steps are set forth but this can be altered without departing from the inventive idea.

The jack is strong and rugged-easy to apply and remove from the rod sections and may be readily operated with a minimum of effort.

While in describing the invention, I have referred in detail to certain form and arrangement of the parts, the same is to be considered only in the illustrative sense so that I do not wish to be limited thereto except as may be specifically set forth in the appended claims.

I claim as my invention:

1. A pull rod jack embodying therein, means 3 adapted to be detachably secured to one section of a pull rod, a'pull transmitting member secured to said means, a jack housing, means for securing the housing to the other section of the: pull rod,

a member mounted in the housing for longitudinal movement, coacting means on the housing and last mentioned member for'producing movement of the latter, when under load, longitudinally with respect to said other rod section, means on said member mounted in the housing adapted for a pulling engagement with said pull transmitting member, and means fixed with respect to said other section of the pull rod'adapt'ed for engagement by the pull transmitting member for holding the latter under tension when moving. said member in the housing toward the first mentioned rod section.

2. A pull rod jack embodying therein, means adapted to be detachably secured to one section of a pull rod, a pull transmitting member secured to said means, a jack housing, means for secur ing the housing to the other section of the pull rod, a member mounted in the housing: forlongitudinal movement, coacting means on the housing and last mentioned member for producing movement of the latter, when under load, longitudinally with respect to said other red section, means on said member mounted in the housing adapted for a pullin engagement with said pull transmitting member, and means on said housing for engagement by. the pull transmitting. member for holding the latter under tension when moving said member in the housing toward the first'm'en tioned rod section.

3. A pull rod. jack embodying therein, means adapted to bev detachably secured to one section of a pull rod, a plurality of flexible but in'extensible members secured to said means, a jack-housing, means for securing the housing to the other section of the pull rod, a member mounted in the load, longitudinally with respect to said otherrod section, means on" said member mounted inthe" housing adapted for a pulling engagement with said flexible but inextensible members, and means fixed with respect to said other section of the pull rod adapted for engagement by said flexible but inextensible members for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

4. A pull rod jack embodying therein, means adapted to be applied laterally upon and to be detachably secured to one section of a pull rod, a pull transmitting member secured to said means, a jack housing, means for securing the housing to the other section of the pull rod, a member mounted in the housing for longitudinal movement, coacting'means in the housing and last mentioned member for producing movement of the latter, when under load, longitudinally with respect to said other rod section, means on said member in the housing adapted for a pulling engagement with said pull transmitting member, and means fixed with respect to the other section of the pull rod adapted for engagement by the pull transmitting member for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

5. A pull rod jack embodying therein, means adapted-to be applied laterally upon and to be detachably secured to one section of a pull rod, a pull transmitting member secured to said means, a jack housing adapted for lateral application upon the other section of the pull rod, means for securing said housing'to the other section of the pull rod after the housing has been laterally applied thereto, a member mounted in the housing for longitudinal movement, coacting means in the housing and on last mentioned member for producing movement of the latter, when under load, longitudinally with respect to said other rod section, means on said member in the housing adapt ed for a pulling engagement with said pull transmitting member, and means fixed with respect to the other section of the pull rod adapted for enga-gement by the pull transmitting member for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

6. A pull rod jack embodying therein, means adaptedto be laterally applied upon and to be detachably secured to one section of a pull rod, a plurality of flexible but inextensible members secured to said means, a jack housing, means for securing the housing to the other section of the pull rod, a member arranged in said housing for longitudinal movement, coacting means in the housing and last mentioned member for producing movement of the latter, while under load, longitudinally with respect to said other rod section, means on said member in said housing adapted for a pulling engagement with said flexible but inextensible members, and means fixed with respect to said other section of the pull rod for engagement by said flexible but inextensible members for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

7. A pull rod ja'ck embodying therein, means adapted to be laterally applied upon and to be detachably secured to one section of a pull rod, a. pull transmitting member secured thereto, a jack housing adapted to be laterally applied upon and to be detachably secured to another section of the pull rod, a member arrangedin said housing for longitudinal movement, coacting means in said housing and last mentioned member'for producing movement of the. latter, while under load, longitudinally with respect to said other rod section, means on said member in'said housing adapted for a pulling engagement with said pull transmitting members, and means fixed with respect to the other section of the pull rod for holding the latter under tension when moving said member in said housing toward the first mentioned section of the pull rod.

8. A pull rod jack embodying therein, means adapted to be detachably secured to one section of a pull rod, a pair of chains attached thereto, a jack housing, means for securing the same to the other section of the pull rod, a 'member mounted in the housing for longitudinal movement, coacting means on said housing and mem-' her for producing movement of the latter while under load, longitudinally with respect to'said other rod section, means on said member in-the housing and adapted for engagement with different portions of said chains for transmitting a pull to said chains, and means fixedwith respect to the other section of the pull rod for engagement by said chains for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

9. A pull rod jack embodying therein, means adapted to be detachably secured to onesection of a pull rod, a pair of chains attached thereto, a. jack housing, means for securing the same to the other section of a pull rod, a member mounted in the housing for longitudinal movement, coacting means on said housing and member for producing movement of the latter, while under load, longitudinally with respect to said other rod section, means on said member in the housing and adapted for engagement with different portions of said chains for transmitting a pull to said chains, and means on said housing for receiving certain links of said chains for holding them under ten' sion when moving said member in said housing toward the first mentioned rod section.

I 10. A pull rod jack embodying therein means adapted to be applied laterally upon one section of a pull rod, jaws carried by said means for clamping the same to said pull rod section, chains attached to said means, a jack housing adapted to be applied laterally upon the other section of the pull rod, jaws carried thereby to clamp the same to said other section, a member arranged in said housing for longitudinal movement, coacting means on said housing and member for producing movement of the latter, while under load, longitudinally with respect to said other rod. section, means on said member adapted for engagement with different portions of the chains for transmitting a pull thereto, and means fixed'with respect to the other section of the pull rod for engagement by said chains for holding the latter under tension when moving said member in the housing toward the first mentioned rod section.

11. A pull rod jack embodying therein, means adapted to be detachably secured to one section of a pull rod, chains attached thereto, a jack housing, means'for securing the housing to the! other section of the pull rod, a member mounted on the housing for longitudinal movement, coacting means on the housing and the last mentioned member for producing movement ofthe latter when under load, longitudinally with respect to said other rod section, a cross head carried by said member and adapted to receive portions of said chains, means associated with said cross head for engagement with certain links of the and means fixed with respect to said other section of the pull rod for engagement by said chains for holding the latter under tension when moving the member in the housing toward the first mentioned rod section.

12. A pull rod jack embodying therein, means adapted to be detachably secured to one section of a pull rod, chains attached thereto, a jack housing, means for securing the housing to the other section of the pull rod, a member mounted on the housing for longitudinal movement, coacting means on the housing and the last mentioned member for producing movement of the latter when under load, longitudinally with respect to said other rod section, a cross head carried by said member and including ways for the passage therethrough of the chains, chain engaging members, one for each way and. each including a link receiving slot mounted on said head for movement toward and from said ways for engagement with and disengagement from desired links in said chains, and means fixed with respect to the other section of the pull rod for engagement by said chains for holding the latter under tension when moving the member in the housing toward the first mentioned rod section.

13. In a jack of the kind described, a cross head adapted for attachment to the extensible mom-- ber of a jack mechanism and including laterally spaced ways for the passage of chains therethrough and formed between said ways with a pull rod recess bottomed by a pull rod-retaining hook defining a bottom opening entrance for one side of said recess, and means associated with each way for engagement With certain links of the chain to lock the same to the cross head.

14. A pull rod jack embodying therein, means adapted to be detachably secured to one section of a pull rod, a pull transmitting member secured to said means, a. jack body, means for securing the body to the other section of the pull rod, a member carried by the body for longitudinal movement, co-acting means carried by the body and by the last mentioned member respectively, for producing movement of the latter, when under load, longitudinally with respect to said other rod section, means on said member carried by the body and adapted for a pulling engagement with said pull transmitting member, and means fixed with respect to said other section of the pull rod adapted for engagement by the pull transmitting member for holding the latter under tension when moving said member carried by the first mentioned rod section.

CHARLES NEHER.

Images