METHOD AND APPARATUS FOR COILING A CONTINUOUS ROD

Abstract

A coupling for use with a continuous rod and a reel, and a method of using the coupling to coil a continuous rod on the reel. The coupling includes a threaded box portion for threadedly connecting with an uphole pin end of the continuous rod. The coupling includes a connector for securing the coupling to the reel. Once secured to the reel by the coupling, the continuous rod can be coiled around the reel by rotation of the reel. In an example application, the connector may include a ring for securing the coupling to an outside guide pin of a collapsible service reel.

Claims

1. A method of coiling a continuous rod onto a reel, the method comprising: threadedly connecting a coupling to an uphole pin end of the continuous rod; securing the coupling to the reel; and rotating the reel to coil the continuous rod onto the reel.

2. The method of claim 1 wherein the reel comprises a service reel.

3. The method of claim 2 wherein the service reel comprises a collapsible service reel.

4. The method of claim 3 wherein securing the coupling to the collapsible service reel comprises securing the coupling to a guide member extending from an arm of the collapsible service reel.

5. The method of claim 4 wherein securing the coupling to the guide member comprises engaging a closed connector portion of the coupling with the guide member.

6. The method of claim 2 wherein securing the coupling to the service reel comprises securing the coupling to a first guide member extending from an arm of the service reel.

7. The method of claim 6 wherein securing the coupling to the first guide member comprises placing a ring connector portion of the coupling over the first guide member.

8. The method of claim 6 wherein the service reel comprises a plurality of paired inside guide members and outside guide members; each pair of guide members extends from a separate arm of the service reel; and the first guide member comprises an outside guide member.

9. The method of claim 1 wherein securing the coupling to the reel comprises engaging a closed connector portion of the coupling with an open connection point of the reel.

10. The method of claim 1 wherein securing the coupling to the reel comprises engaging an open connector portion of the coupling with a closed connection point of the reel.

11. The method of claim 1 wherein securing the coupling to the reel comprises engaging an open connector portion of the coupling with an open connection point of the reel.

12. The method of claim 1 wherein the coupling and the pin end each comprises American Petroleum Institute (“API”) standard rod threading.

13. The method of claim 12 wherein the API standard rod threading is ¾″, ⅞″, 1″, 1 ⅛″, or 1 ¼″ rod threading.

14. The method of claim 1 wherein the coupling is configured to separate under application of a failure force, separating the continuous rod from the reel.

15. The method of claim 14 wherein: the coupling comprises a first portion reversibly connected with a second portion by a connection configured to separate under application of the failure force; threadedly connecting the coupling to the uphole pin end of the continuous rod comprises connecting the first portion with the uphole pin end of the continuous rod; and securing the coupling to the reel comprises connecting the second portion with the reel.

16. A coupling for securing a continuous rod to a reel, the coupling comprising: a body; a threaded box defined in the body for receiving a threaded pin end of the continuous rod; and a connector extending from the body for connecting the coupling to the reel.

17. The coupling of claim 16 wherein the connector comprises a closed connector for securing the coupling to an open connection point on the reel.

18. The coupling of claim 16 further comprising a movable joint between the body and the connector.

19. The coupling of claim 16 wherein the connector extends from the body in a fixed relationship with respect to the body.

20. The coupling of claim 16 wherein the connector comprises an open connector for securing the coupling to a closed connection point on the reel or to an open connection point on the reel.

21. The coupling of claim 20 comprising a cover for reversibly closing an open portion of the open connector.

22. The coupling of claim 21 wherein the cover is engaged with the coupling by a pivot for pivoting between an open position with the open portion of the open connector exposed and a closed position with the open portion of the open connector covered.

23. The coupling of claim 21 wherein the cover is slidably received within the body for translating into the body to open the open connector and emerging from the body to close the open connector.

24. The coupling of claim 16 wherein the threaded box comprises American Petroleum Institute (“API”) standard rod threading.

25. The coupling of claim 24 wherein the API standard rod threading is ¾″, ⅞″, 1″, 1 ⅛″, or 1 ¼″ rod threading.

26. The coupling of claim 16 wherein the body comprises an elongate body extending between a first end and a second end, and the threaded box portion is defined on the first end.

27. The coupling of claim 26 wherein the connector is located on the body proximate the second end.

28. The coupling of claim 16 wherein the body comprises an angled portion between a the threaded box portion and the connector for offsetting the threaded box portion from the connector by an angle.

29. The coupling of claim 16 wherein the body comprises: a first portion; and a second portion reversibly connected with the first portion by a connection; wherein: the threaded box end is defined in the first portion; the connector extends from the second portion; and the connection fails, disconnecting the first portion from the second portion, under application of force, equal to or greater than a failure force, to the connection.

30. The coupling of claim 29 wherein the connection comprises a shear pin connecting the first portion with the second portion for shearing and disconnecting the first portion from the second portion, under application of the failure force.

31. The coupling of claim 30 wherein: the connection comprises a connection pin received within a connection box dimensioned to receive the connection pin; and the shear pin is received within the connection pin and the connection box.

32. The coupling of claim 31 wherein the connection pin extends from the first portion and the connection box is defined in the second portion.

33. The coupling of claim 31 wherein the connection box is defined in the first portion and the connection pin extends from the second portion.

34. A system for coiling a continuous rod comprising: a reel for coiling the continuous rod, the reel comprising a connection point; a coupling for securing a continuous rod to the connection point, the coupling comprising: a body; a threaded box defined in the body for receiving a threaded pin end of the continuous rod; and a connector extending from the body for connecting the coupling to the connection point.

35. The system of claim 34 wherein the reel is a service reel.

36. The system of claim 34 wherein the reel is a transport reel.

37. The system of claim 34 wherein the connection point comprises an open connection point and the connector comprises an open connector or a closed connector.

38. The system of claim 34 wherein the connection point comprises a closed connection point and the connector comprises an open connector.

39. The system of claim 34 wherein: the body comprises: a first portion; and a second portion reversibly connected with the first portion by a connection; the threaded box end is defined in the first portion; the connector extends from the second portion; and the connection fails, disconnecting the first portion from the second portion, under application of force, equal to or greater than a failure force, to the connection.

40. The system of claim 34 wherein the threaded box comprises American Petroleum Institute (“API”) standard rod threading.

41. The system of claim 40 wherein the API standard rod threading is ¾″, ⅞″, 1″, 1 ⅛″, or 1 ¼″ rod threading.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Embodiments of the present disclosure will now be described, by way of example only, with reference to the attached figures, in which features sharing reference numerals with a common final two digits of a reference numeral correspond to similar features across multiple figures (e.g. the coupling 50, 150, 250, 350, 450, 550, 650, 750, etc.).

[0039] FIG. 1 is a plan view of a prior art service reel and continuous rod;

[0040] FIG. 2 is an elevation view of the service reel of FIG. 1;

[0041] FIG. 3 is a perspective view of a coupling having a closed connector;

[0042] FIG. 4 is a perspective view of the coupling of FIG. 3 threaded on to the continuous rod and connected with the service reel of FIG. 1 for securing the continuous rod to the service reel;

[0043] FIG. 5 is a detail plan view of the coupling, continuous rod, and service reel of FIG. 4;

[0044] FIG. 6 is a plan view of the coupling, continuous rod, and service reel of FIG. 4;

[0045] FIG. 7 is a plan view of the coupling, continuous rod, and service reel of FIG. 4 after rotation of the service reel;

[0046] FIG. 8 is a plan view of a reel and continuous rod;

[0047] FIG. 9 is an elevation view of the reel of FIG. 8;

[0048] FIG. 10 is a perspective view of a coupling having an open connector;

[0049] FIG. 11 is a perspective view of the coupling of FIG. 10 threaded on to the continuous rod and connected with the reel of FIG. 8 for securing the continuous rod to the reel;

[0050] FIG. 12 is a detail plan view of the coupling, continuous rod, and reel of FIG. 11;

[0051] FIG. 13 is an elevation view of a coupling having a movable joint between a body and a connector of the coupling;

[0052] FIG. 14 is an elevation side view of the coupling of FIG. 13;

[0053] FIG. 15 is a perspective view of a coupling having an open connector and a hinged cover;

[0054] FIG. 16 is a perspective view of a coupling having an open connector and a sliding cover;

[0055] FIG. 17 is a perspective view of a coupling having an angle offsetting a box end for connection with the continuous rod from a connector for securing to the reel;

[0056] FIG. 18 is a perspective view of a coupling having a two-part body;

[0057] FIG. 19 is an exploded perspective view of the coupling of FIG. 18;

[0058] FIG. 20 is a cross-sectional elevation view of the coupling of FIG. 18; and

[0059] FIG. 21 is a perspective view of a coupling having a two-part body.

DETAILED DESCRIPTION

[0060] Generally, the present disclosure provides a method and apparatus for securing a continuous rod to a reel for coiling the continuous rod onto the reel. A coupling may be used to couple the continuous rod with the reel. The coupling includes a threaded box and a connector. The threaded box may be threaded to match American Petroleum Institute (“API”) thread for continuous rod pin ends for connection to a pin end of a continuous rod. The connector may include a ring, a hook, or any suitable feature for use with a connection point on a particular reel that the connector is designed to be used with.

[0061] The coupling described herein may include a connector with features for connection with an open connection point on the reel, a closed connection point on the reel, or both. Examples of an open connection point include a load-bearing pin or a hook. A connector on the coupling including a ring with a sufficient inside diameter to receive the load-bearing pin or hook may be engaged around the load-bearing pin or hook to connect with the load-bearing pin and secure a continuous rod (threaded into the threaded box of the coupling) to the reel.

[0062] Examples of closed connection points include a ring, or a load-bearing pin capped by a portion of the pin too large to be received by a ring connector. A hook or other open connector with a sufficiently large open portion to receive the outside diameter of the ring or of the pin below the large portion may be engaged with either of the example closed connection points to secure a continuous rod (threaded into the threaded box of the coupling) to the reel. A connector including a hook or other suitable feature for connecting with a closed connection point may also be connected with an open connection point, and such use may be facilitated where the connector includes a cover to close the open portion of the hook or other feature.

[0063] A collapsible service reel may include inside and outside guide pins for defining a radial rod pocket. Each of the outside guide pins may provide an open connection point on the collapsible service reel in designs with no large feature on top of the outside guide pins. An example of a collapsible service reel is shown in photographs included in an advertisement for the COROD® Reel Mover. The advertisement is copyright 2014, has a footer with reference number 11138.00, and is available online at www.weatherford.com.

[0064] Other continuous rod reels, such as a transport reel, may be more enclosed than a service reel to secure a continuous rod to the transport reel for transport while being maintained on an angle, such as the transport reel disclosed as prior art in FIGS. 1 A and 1B of U.S. Pat. No. 8,869,580 to Basler et al.

[0065] To apply the apparatus and method described herein to previous continuous rod reels lacking an inherent connection point, such as the connection point provided by an outside guide pin of a service reel, an open connection point or a closed connection point may be added to the reel for use with the connectors described herein. An example of such a connection point is provided in the connection ring 135 of FIGS. 9, 11, and 12 below.

[0066] FIGS. 1 and 2 show plan and elevation schematics of a prior art service reel 10 for coiling and transporting a continuous rod 20. The service reel 10 may be a collapsible service reel for simplifying transport of an empty service reel to a wellsite. The service reel 10 includes a central body 12. A plurality of arms 14 extend from the central body 12. Each arm 14 extends between an inside end 13 proximate the central body 12 and an outside end 15 opposed from the inside end 13. The service reel 10 is shown with eight evenly-spaced arms 14 but any suitable number of arms may be found in other examples of reels similar to the service reel 10.

[0067] An outside guide pin 16 extends from each of the arms 14 proximate the outside end 15. An inside pin guide 18 extends from each of the arms 14 intermediate the outside guide pin 16 and the inside end 13. Each of the arms 14 may include a brace 19 extending from the central body 12 to a position intermediate inside end 13 and the outside end 15. The position where the brace 19 connects with the arm 14 may correspond to the inside guide pin 18, as shown in the service reel 10. A plurality of stabilizer members 17 may extend between the brace 19 and the arm 14. The outside guide pins 16 and the inside guide pins 18 of the service reel 10 are examples of guide members that may be on a continuous rod reel.

[0068] The continuous rod 20 is shown emerging from a rod guide 22. The continuous rod 20 includes a threaded pin end 24 on an uphole end of the continuous rod 20. The threaded pin end 24 may be used to threadedly connect the continuous rod 20 to a polish rod (not shown) or other uphole production equipment (not shown) when the continuous rod 20 is being used for production. The threaded pin end 24 may be threaded with standardized thread patterns and sizes defined by the API, as shown in Table 1.

TABLE-US-00001 TABLE 1 API standard continuous rod outside diameters and thread sizes on the pin end Continuous Rod OD API Thread Sizes ⅞″ ⅞″ 1″ ⅞″, 1″, 1⅛″ 1⅛″ 1″, 1⅛″

[0069] The continuous rod outside diameter and thread sizes shown in Table 1 are the current commonly-used API standardized threads and OD values for a continuous rod. The approach to coiling a continuous rod described herein may be applied to any specific OD or thread size of a given continuous rod that the apparatus and method may be applied to.

[0070] The outside guide pins 16 positioned on each arm 14 define an outside radial path 25. When the service reel 10 is rotated, the guide pins 16 follow the outside radial path 25. The inside guide pins 18 positioned on each arm 14 similarly define and follow an inside radial path 27. A continuous rod path 26, also referred to as a rod pocket, is defined between the outside radial path 25 and the inside radial path 27. When the continuous rod 20 is secured to the service reel 10 by previous methods, such as tying the continuous rod 20 to one of the arms 14 with haywire, the continuous rod 20 may follow the continuous rod path 26 while coiling as a result of rotation of the service reel 10.

[0071] FIG. 3 shows a coupling 50 for securing a continuous rod to a reel, such as securing the continuous rod 20 to the service reel 10. The coupling 50 includes a body 52 extending between a first end 51 and a second end 53. A threaded box 54 is defined in the body 52 proximate the first end 51 for threading on to the pin end 24. A connector 60 is located proximate the second end 53 of the body 52. The connector 60 includes a ring 62 extending from the body 52. The ring 62 may extend from the body 52 in a fixed relationship with the body 52 as shown.

[0072] FIGS. 4 and 5 show the coupling 50 threaded on to the continuous rod 20 at the threaded box 54 and with the connector 60 secured to the service reel 10 at the outside guide pin 16. The ring 62 may be placed over the outside guide pin 16 and lowered to the arm 14 as shown. The pin end 24 of the continuous rod 20 is threadedly connected with and inside the threaded box 54, and is not shown in FIGS. 4 and 5.

[0073] FIG. 6 shows a plan view of the coupling 50 securing the continuous rod 20 to the service reel 10 for coiling the continuous rod 20 around the service reel 10.

[0074] FIG. 7 shows the coupling 50, the continuous rod 20, and the service reel 10, after rotating the service reel 10 about the central body 12 through about 270 degrees relative to the position shown in FIG. 6. As the service reel 10 is rotated about the central body 12, the continuous rod 20 is coiled around the service reel 10.

[0075] As shown in FIGS. 6 and 7, the coupling 50 may be threaded on to the continuous rod 20 by threading the pin end 24 of the continuous rod 20 into the threaded box 54. The coupling 50 is secured to the service reel 10 by engaging the ring 62 with one of the outside guide pins 16. The ring 62 is passed onto and over the outside guide pin 16, and lowered to a position on the outside guide pin 16 proximate the arm 14. Threading the continuous rod 20 into the threaded box 54 and connecting the connector 60 with the service reel 10 may provide a predictable and secure connection between the continuous rod 20 and the service reel 10. The predictability may include predictability both in the strength of the connection and in the location of the connection relative to the outside guide pins 16 and other features of the service reel 10.

[0076] FIGS. 8 and 9 show plan and elevation schematics of an alternative design of a reel 110 for coiling the continuous rod 120. The reel 110 includes many features similar to a transport reel. The reel 110 includes the central body 112 and the plurality of arms 114, with each of the arms 114 extending outward from the inside end 113 proximate the central body 112 to the outside end 115 opposed from the inside end 113.

[0077] Unlike the service reel 10, the reel 110 lacks outside guide pins that each provide an inherent connection point. Each of the arms 114 ends includes a bar 130 extending between a bottom end 132 and a top end 134. On each of the bars 130, the bottom end 130 extends from the arm 114 proximate the outside end 115. Each of the bars 130 includes an angled portion 137 intermediate the bottom end 132 and the top end 134. The angled portion 137 defines an angle 136 for containing the continuous rod 120 when coiled around the reel 110 (continuous rod 120 not shown coiled around the reel 110). A connection ring 135 is included on each of the bars 130 proximate the angled portion 137. The connection ring 135 is an example of a closed connection point on the reel 110. Other closed connection points, or open connection points, may be applied in place of the connection ring 135.

[0078] An intermediate ring 131 may be positioned intermediate the bottom end 132 and the top end 134 of each of the bars 130. The intermediate ring 131 may be positioned at the angled portion 137 of the bar 130. An upper ring 138 may be positioned proximate the respective top ends 134 of each of the bars 130.

[0079] In the reel 110, the outside radial path 125 may be defined by the bars 130 at the apex of the angled portions 137. As a result, the outside radial path 125 may coincide with the radial path defined by rotation of the intermediate ring 131. When the reel 110 is rotated, the bars 130 follow the outside radial path 125 at the angled portion 137. The inside guide pins 118 positioned on each arm 114 similarly define and follow the inside radial path 127. The continuous rod path 126 is defined between the outside radial path 125 (corresponding to the intermediate ring 131), and the inside radial path 127 (corresponding to a path through which the inside guide pins 118 rotate).

[0080] In previous transport reels, when the continuous rod is secured to the transport reel by welding, haywire, or other previous methods and coiled around the transport reel by rotation, the continuous rod may follow a continuous rod path similar to the continuous rod path 126. When preparing a transport reel loaded with a continuous rod at a fabrication plant or other source location, the continuous rod may be welded to the transport reel and may lack threaded pin ends. In such cases, the pin ends may be welded to the continuous rod at the wellsite before running the rod downhole. In other cases, a transport reel may be loaded with a continuous rod having a pin end at a fabrication plant or other source location, or a transport reel may loaded with a continuous rod at a well site to remove the continuous rod from the well site. However, embodiments described herein related to the reel 110 and the connection point 135 may be applicable to a transport reel, or to a service reel (including a collapsible a service reel) with a connection point that is not present inherently as part of the reel design (such as the guide pin 16 on the service reel 10), with a connection point that is a closed connection point, or both.

[0081] FIG. 10 shows a coupling 150 for use with a closed connection point, such as the ring 135 on the reel 110. The coupling 150 includes the body 152 extending between the first end 151 and the second end 153. A threaded box 154 is defined proximate the first end 151 for threading on to the pin end 124. The connector 160 includes a hook 164. The hook 164 may be connected to the reel 110 at the connection ring 135 for securing the continuous rod 120 to the reel 110.

[0082] FIGS. 11 and 12 show the coupling 150 threaded on to a continuous rod 120 and connected with the reel 110 at the connection ring 135 for securing the continuous rod 120 to the reel 110. The connection ring 135 may be included with the reel 110 to provide a connection point for a reel lacking an inherent connection point, such as the outside guide pins 16 on the service reel 10. As above, the connection ring 135 is an example of a closed connection point on the reel 110. Other closed connection points, or open connection points, may be applied in place of the connection ring 135. A coupling with a closed connector, such as the ring 62 of the connector 60, may be applied to an open connection point on the reel. A coupling with an open connector, such as the hook 164 of the connector 160, may be applied to either a closed connection point or an open connection point on the reel.

[0083] In the reel 110, the top ring 136 closes off the top ends 134 of the bars 130 and prevents a closed connector, such as the connector 60 with the ring 62, from securing the continuous rod 120 to the closed-top reel 110 by placing the closed connector over the top end 134 of the one of the bars 130. This is in contrast to use of the coupling 50 with the to the service reel 10, in which the outside guide pin 16 of the service reel 10 may be received within the ring 62, providing an inherent open connection point with the service reel 10 for the connector 60, as shown in FIGS. 4 to 7. In addition, the bar 130 may be relatively large, which in transport reels may be in part to secure heavy loads of coiled continuous rod during transport. As a result, even absent the top ring 136, the reel 110 may lack an inherent connection point.

[0084] The connection ring 135 facilitates use of the coupling 150 with the reel 110. Where the reel 110 is a transport reel, the connection ring 135 may be included in the transport reel to allow coiling of continuous rod on to the transport reel prior to transport with the advantages of using the coupling 150 to connect the continuous rod to the transport reel. The coupling 150 or a similar coupling may have application to a transport reel modified to include the connection ring 135 of the reel 110 (or a similar connection point for the coupling to secure to the reel by the connector) when the transport reel is used to remove continuous tubing from a wellsite. In addition, as described above, when coiling new continuous rod at a fabrication plant, the continuous rod may typically be coiled around the transport reel without threaded pin ends on the continuous rod. The threaded pin ends may be welded onto the continuous rod at the wellsite, with the uphole pin end being added after the continuous rod is cut to size at the wellsite. As a result, applying the apparatus and method described herein to a transport reel at a fabrication site may require welding a pin end onto the continuous rod coiled around the transport reel.

[0085] FIGS. 13 and 14 show a coupling 250 including the connector 260 with the ring 262. The coupling 250 includes the body 252 extending between the first end 251 and the second end 253. The threaded box 254 is defined in the body 252 proximate the first end 251 for threading on to the pin end of a continuous rod. The ring 262 is connected with the body 252 by a movable joint 266 to allow the ring 262 to flip with respect to the body 252 as shown by the different position of the ring 262 with respect to the body 252 in FIG. 14 as compared with FIG. 13. The movable joint 266 may include a hinge. The movable joint 266 may facilitate securing the connector 260 to a reel once the coupling 250 is threaded on to a continuous rod at the threaded box 254 in some cases, relative to the ring 62 of the coupling 50, in which the connector 60 extends from the body 52 in a fixed relationship with respect to the body 52.

[0086] The connector 60 is located proximate the second end 53 of the body 52. The connector 60 includes a ring 62 extending from the body 52. The ring 62 may extend from the body 52 in a fixed relationship with the body 52 as shown

[0087] FIG. 15 shows a coupling 350 including the hook 364 and a cover 368 connected to the body 352. The coupling 350 includes the body 352 extending between the first end 351 and the second end 353. The threaded box 354 is defined in the body 352 proximate the first end 351 for threading on to the pin end of a continuous rod. The cover 368 may be pivoted with respect to the hook 364 to cover an open portion of the hook 364. Where the connector 360 is for securing the coupling 350 to a ring or other closed connection point on a reel, the coupling 350 may facilitate securing the connector 360 with the reel by providing an open connector 360 with the hook 364. The connector 360 also facilitates connecting to a ring or other closed connection point by providing the cover 368, which may be closed after connecting the connector 360 with the closed connection point on the reel. For example, the coupling 350 may be secured to the connection ring 135 of the reel 110, or any suitable closed connection point on a reel, and the cover 368 may mitigate the chance that the connector 360 may slip off the connection point, releasing the connector 350 and any continuous rod threaded into the box end 354, from being secured with the reel.

[0088] FIG. 16 shows a coupling 450 including the hook 464 and a sliding cover 469. The coupling 450 includes the body 452 extending between the first end 451 and the second end 453. The threaded box 454 is defined in the body 452 proximate the first end 451 for threading on to the pin end of a continuous rod. The sliding cover 469 may be withdrawn into the body 452 by pulling back on a switch 467, placing the sliding cover 469 in an open position. The sliding cover 469 is shown partially withdrawn into the body 452 in FIG. 16. When securing the coupling 450 to a connection point on a reel with the hook 464, the sliding cover 469 may be withdrawn into the body 452 to allow better access to a connection point by the hook 464. Once the hook 464 is engaged with the connection point, the sliding cover 469 can be closed by emerging the sliding cover 469 from the body 452 into a closed position. The sliding cover 469 may be translated between the open position and the closed position by using the switch 467.

[0089] The coupling 450 may be used with an open connection point, such as the outside guide pin 16 of the service reel 10. The coupling 450 may also be used with a closed connection point, such as the connection ring 135 of the reel 110. Where the connector 460 is for connecting to a closed connection point, the sliding cover 469 and the hook 464 may facilitate safely securing the coupling 450 with the reel. For example, the coupling 450 may be secured to the connection ring 135 of the reel 110, or any suitable closed connection point on a reel.

[0090] FIG. 17 shows a coupling 550 include a body 556 in which the first end 551 and the second end 553 are offset by an angle 555 with respect to one another rather than at opposed ends of an elongate body, as shown in the bodies 52, 152, 252, 352, and 452. The angle 555 between the connector 560 and the threaded box end 554 may provide advantages in some cases depending on the specific geometry of a reel with which the coupling 550 is intended for use. The angle 555 is close to 90 degrees, but other angles may be included in a coupling body similarly to as shown in the coupling 550.

[0091] FIGS. 18 to 20 show a coupling 650 with a two-part body 670. The two part body 670 includes a first portion 672 for connecting to a coiled rod and a second portion 674 for connection to a reel. The first portion 672 extends to the first end 651 of the two-part body 670 and includes the threaded box 654. The second portion 674 extends to the second end 653 of the two-part body 670 and includes the connector 660. The ring 662 is connected with the body 652 by the movable joint 666 to allow the ring 662 to flip with respect to the two-part body 672. The movable joint 666 includes a portion of the ring 662 received within the second portion 674 proximate the second end 653.

[0092] The first portion 672 and the second portion 674 are connected by a connection 680. The connection 680 includes a connection pin 682 and a connection box 684. The connection pin 682 is receivable within the connection box 684. The connection pin 682 includes a groove 686 and a pair of shear pins 688 may be threaded through an aperture 689 in the connection box 684 into the groove 686 for securing the connection pin 682 with the connection box 684 and securing the first portion 672 with the second portion 674.

[0093] A first force 676 may be applied in a direction corresponding to a pull on the first portion 672. A second force 678 may be applied in a direction corresponding to a pull on the second portion 674. The first force 676 and the second force 678 are opposed and result in application of stress to the connection 680. Where the stress results in a force on the connection 680 equal to a failure force, the shear pins 688 will shear, separating the first portion 672 from the second portion 674.

[0094] The connection 680 separates under a force equal to or greater than the failure force. A continuous rod runaway is an event in which case the continuous rod is lost and running out of control down a wellbore. In this case, stress on a reel may be dangerous if maintained. As a result, the connection 680 will break at a failure force likely to be experienced in a continuous rod runaway event. The failure force may be selected to correspond to the stress that would be placed on the connection 680 under force that are lower than a dangerous level of force as expected based on previous continuous rod runaway events.

[0095] An example coupling 650 was manufactured from J55 and low-carbon steel. In the example coupling 650, the box end 654 is threaded to fit 1″ API standard rod threading for continuous rod pin ends. In the example coupling 650, the first portion 672 is 3 ⅞″ long and 2 ¼″ wide and the second portion 674 is 2 ⅜″ long. In the example coupling 650, the shear pins 688 were ¼″ brass pins. In the example coupling 650, the groove 686 is ¼″ wide and 3/16″ deep, and the connection pin 682 is ¾″ long and 1 ⅜″ wide. The example coupling 650 was subjected to a tension-based pull test procedure on a Satec Tensile Tester. The test was conducted between 15° C. and 32° C. With four screws placed evenly at 90° intervals radially around the two-part body 670, the ultimate load at failure was 5066 lbs. With two screws spaced across opposed sides of the two-part body 670, at 180° intervals radially, the ultimate load at failure was 2530 lbs.

[0096] FIG. 21 shows a coupling 750 including the two-part body 770. The coupling 750 includes a body 752 extending between a first end 751 and a second end 753. A threaded box 754 is defined in the body 752 proximate the first end 751 for threading on to the pin end 724. A connector 760 is located proximate the second end 753 of the body 752. The connector 760 includes a ring 762 extending from the body 752. The ring 762 may extend from the body 752 in a fixed relationship with the body 752 as shown.

EXAMPLES ONLY

[0097] In the preceding description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the embodiments. However, it will be apparent to one skilled in the art that these specific details are not required.

[0098] The above-described embodiments are intended to be examples only. Alterations, modifications and variations can be effected to the particular embodiments by those of skill in the art. The scope of the claims should not be limited by the particular embodiments set forth herein, but should be construed in a manner consistent with the specification as a whole..