US20080252088A1 - Sucker rod fishing tool - Google Patents
Sucker rod fishing tool Download PDFInfo
- Publication number
- US20080252088A1 US20080252088A1 US11/786,699 US78669907A US2008252088A1 US 20080252088 A1 US20080252088 A1 US 20080252088A1 US 78669907 A US78669907 A US 78669907A US 2008252088 A1 US2008252088 A1 US 2008252088A1
- Authority
- US
- United States
- Prior art keywords
- piece
- sucker rod
- tool
- slip
- fishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims abstract description 19
- 230000000717 retained effect Effects 0.000 claims abstract description 8
- 210000005069 ears Anatomy 0.000 claims description 9
- 241001272720 Medialuna californiensis Species 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 description 22
- 238000010168 coupling process Methods 0.000 description 22
- 238000005859 coupling reaction Methods 0.000 description 22
- 239000011324 bead Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 241000251468 Actinopterygii Species 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Definitions
- the present invention relates to a fishing tool for fishing sucker rods, tubing, pipe, pumps, plungers, plugs, tubing stops, packers, tools, anchors, obstructions, etc. from downhole in a subterranean well, such as but not limited to an oil producing, gas producing, injection or disposal well.
- a fishing tool of the present invention is strong enough to retrieve up to 12,000 feet of rod at once, is designed to reduce stress on the tool so that it can be reused multiple times, is serviceable because it can be disassembled and repaired in the field, and is versatile since it can be combined with bells, adapters and other existing types of rod fishing equipment and accessories to successfully retrieve a wide range of items from subterranean wells.
- Prior art fishing tools generally are of three types: tools that are overshot sockets, tools that bite and tools that are traps.
- An example of an overshot socket type tool can be found in U.S. Pat. No. 1,869,861 issued to O'Bannon. These socket type of tools are designed to telescope over the part left in the well and interlock therewith to permit withdrawal of the part from the well by the tool.
- One problem with the socket type tools is that they are designed to catch only on specific shaped items and therefore are limited in the types of items with which they can interlock.
- the proper socket size must be used for the item to be fished. When the item shape and size is unknown, the operator must play a guessing game to find a socket that is the proper size to work.
- sockets This often results in the several different sizes of sockets having to be run into the well before the proper socket size can be found. This is expensive in terms of time and manpower to try again and again to get the proper socket size for the specific situation. Furthermore the sockets have a tendency of slipping open when hardened, hard lined, brass, out of round or worn couplings are being fished. Lastly, the sockets generally last for only one or two uses and become worn easily.
- the second type is a biter type tool.
- the biting type of tool is also known as a slip socket which should not be confused with the overshot socket type tool.
- An example of a biter type tool can be found in U.S. Pat. Nos. 1,620,382 and 1,620,383 issued to O'Bannon. These biter types of tools are designed to receive the part left in the well within biting members, such as collets, which can be moved inward to bite into the part to attach the part to the tool in order to permit withdrawal of the part from the well by the tool.
- biting members such as collets
- the teeth of the biter type tool are only designed to catch the round rod body section of a sucker rod, and not the other items such as the bead, wrench flat, pin shoulder, pin thread or coupling. Furthermore the teeth on the slips generally only last for one or two uses before becoming worn off. Therefore the slips need to be replaced often between uses.
- the third type is a trap type tool.
- These trap type tools have a mechanism that traps the part inside the tool so that the part is captured therein and can be removed from the well with the tool.
- An example of a trap type tool is taught in U.S. Pat. No. 1,634,935 issued to Donnelly. In that patent, a hinged lift is provided within the tool so that after a shoulder of the part passes the lift, the lift springs back downward and traps the part within the tool.
- the lift of this invention is weak. Also, the tool is limited on the sizes of rods it can catch, limited on where it can catch the rod. The tool can become wedged and therefore limits the amount of pressure that this tool can exert when pulling an item from a well.
- the prior art mousetrap tools have several problems.
- the barrel of this type of tool is weak and can not withstand large lateral strains such as those imposed on it when the slip and the item being pulled are wedge between the walls of the barrel.
- the top of this type of tool is also welded to the barrel portion and this creates another weak area where the tool will break.
- a further problem with this type of tool is that the side opening provided in the barrel of the tool is located above the shoulder of the slip, causing the item to create a sideways pull and torque moment on the tool as the item is pulled. This torque moment imposes stress on the tool that causes the barrel of the tool to split open and fail.
- a further problem with this tool is that it can not be made in the sizes that are needed in the field.
- the geometry of the tool makes the walls too thin to hold the weight and tension of the rod string being pulled from the well.
- the rod string is also known as simply the rod, as working string, wire line tool string, or as tool string.
- a further problem with the tool is the way in which the slip is retained within the barrel of the tool. The slip is retained by shoulders that project into the barrel of the tool and retain the slip therein. There are two ways in which these shoulders are constructed, both of which are described in the Reynolds et al. patent. The first way is to mill slots into the interior surface of the barrel and then weld key stock into the slots to form the shoulders.
- the present invention is a trap tool that addresses the problems found in prior art fishing tools.
- the design of the present tool is much stronger, has less stress concentrations, and no bending moments or torque when pulling.
- the present invention has increased wall thickness, is made of single pieces of metal that are threaded together or otherwise removably connected together instead of being welded together, and is designed to create a straight upward pull on the tool instead of a sideways force when pulling an item out of a well. Therefore, it can retrieve up to approximately 12,000 feet of rods at a time without breaking or withstand approximately 40,000 pounds of tension.
- the present tool is durable, reusable, reliable, has a long service life.
- the cross sectional geometry design of the present invention allows for critical sizes to be made and allows a variety of sizes to be offered. In fact, nine sizes of the invention will be made available to the purchasing public. This allows the invention to be constructed so that it can fish 3 ⁇ 4 inch to 7 ⁇ 8 inch SH or slim hole couplings in 23 ⁇ 8 inch tubing which is not possible with prior art tools. Slim hole couplings have the same outside diameter as the shoulder on the sucker rod whereas standard couplings have outside diameters that are larger than the shoulder of the sucker rod.
- the present invention is a catch-all design that does not require the use of multiple sizes of sockets, such as required by overshot socket types of fishing tools.
- the present tool eliminates the need for oversized tools, sockets, grapples and overshots.
- this tool will catch hard lined couplings, fiberglass, worn or out of round couplings.
- This tool is provided with a threaded bottom end so that a variety of sizes of bells or adaptors can be employed with the tool.
- This tool can fish trashy rods from a well when an optional bottom piece with lip guide is used with the tool that assists in feeding the rods into the tool.
- the lip guide also allows the fishing tool to be utilized in horizontal wells. In horizontal wells the lip guide will guide the broken rod into the tool by rotating the tool from the surface. The lip will catch the rod and pull it over to the center of the fishing tool.
- the present invention is a fishing tool for fishing sucker rods, tubing, pipe, pumps, plungers, plugs, tubing stops, packers, tools, anchors, obstructions, etc. from downhole in a subterranean well.
- the tool functions by trapping a broken sucker rod or other item to be fished out of the well within a barrel part of the tool's body by means of a combination of a movable slip provided within the barrel part and a side opening provided in the barrel part.
- the body of the tool is constructed of parts that are each machined from single pieces of metal stock and provided with threads so that the pieces can be secured together to form the body.
- the body is comprised of a top piece and a barrel piece, and normally also is provided with a bottom piece.
- a slip preferable constructed of cast metal, is movably retained within the body. The slip serves to hold the rod within the barrel piece of the tool so that the rod or other item to be fished out of the well can be removed from the well by the tool.
- the body is normally also provided with a bottom piece, although, the bottom of the barrel piece can optionally be welded shut to permanently retain the slip within the longitudinal grooves and the bottom of the barrel piece can be internally beveled instead of being provided with female threads at its bottom end.
- the normal configuration is to have a bottom piece attached at the bottom end of the barrel piece.
- the bottom piece is also constructed of hollow tube stock.
- the top end of the bottom piece is provided with male threads for engaging the female threads provided on the bottom end of the barrel piece in order to secure the bottom piece to the barrel piece.
- the bottom end of the bottom piece is enlarged externally to help in centering the tool within the tubing and is beveled internally to aid in feeding rod into the barrel of the tool.
- the slip is in a half moon shape, with its externally facing wall convex in shape and its internally facing wall concave in shape.
- Two ears are provided on the external surface of the slip for movable engagement with the longitudinal grooves provided internally within the barrel, as previously described.
- the bottom edge of the slip is beveled on its internally face in a half moon configuration to provide for smooth engagement of the slip with the rod as the rod enters the tool and pushes the slip upward.
- the top end of the slip is provided with a square shoulder against which an expanded surface of the rod or other item to be pulled will engage the slip as the tool is raised, as will be further described herein.
- An optional slip can be employed instead of the standard slip.
- the optional slip is provided with a serrated or toothed shoulder on its top end instead of a square shoulder.
- the purpose of the teeth or serrations is to resist rotational slippage of the caught rod.
- the teeth are milled into a standard slip and are added to allow the tool to more easily be backed-off from downhole. Also, the teeth allow the tool to be more easily used when a rod on/off tool must be unlatched from downhole.
- the present invention is not able to catch on a straight rod if the rod is parted more then ten inches above a rod coupling.
- the present invention can be coupled with an existing biting type fishing tool, such as an O'Bannon slip socket, in order to additionally catch those types of breaks.
- the biting type of tool is also known as a slip socket.
- the top piece of the present invention is removed from the barrel piece and then the bottom piece of an O'Bannon type combination overshot socket device is removed from its top piece.
- the barrel piece of the present invention is attached to the top piece of the O'Bannon type device.
- the barrel piece of the present invention may be attached to the top of piece of the O'Bannon type device either by directly threading the two parts together if their threads are compatible, or alternately, by employing an adaptor to secure them together if their threads are not compatible.
- FIG. 1 is a side view of a fishing tool for fishing sucker rods out of a well constructed in accordance with a preferred embodiment of the present invention.
- FIG. 2 is a front view of the tool taken along line 2 - 2 of FIG. 1 .
- FIG. 3 is an enlarged view of the top piece of the tool associated with numeral 3 of FIG. 1 shown removed from the tool.
- FIG. 4 is a front view of the top piece of the tool taken along line 4 - 4 of FIG. 3 .
- FIG. 5 is a top view of the top piece of the tool taken along line 5 - 5 of FIG. 3 .
- FIG. 6 is a bottom view to the top piece of the tool taken along line 6 - 6 of FIG. 3 .
- FIG. 7 is a cross sectional view taken along line 7 - 7 of FIG. 4 .
- FIG. 8 is a cross sectional view taken along line 8 - 8 of FIG. 4 .
- FIG. 9 is a side view of the barrel piece of the tool associated with numeral 9 of FIG. 1 shown removed from the tool.
- FIG. 10 is a front view of the barrel piece of the tool taken along line 10 - 10 of FIG. 9 .
- FIG. 11 is a side view of the bottom piece of the tool associated with numeral 11 of FIG. 1 shown removed from the tool.
- FIG. 12 is a bottom view of the bottom piece of the tool taken along line 12 - 12 of FIG. 11 .
- FIG. 13 is a cross sectional view of the bottom piece of the tool taken along line 13 - 13 of FIG. 11 .
- FIG. 14 is a front view of the slip of the tool associated with numeral 14 of FIG. 2 shown removed from the tool.
- FIG. 14A is a perspective view of the slip of FIG. 14 .
- FIG. 14B is a perspective view of an alternate slip.
- FIG. 15 is a top view of the slip taken along line 15 - 15 of FIG. 14 .
- FIG. 16 is a cross sectional view of the slip taken along line 16 - 16 of FIG. 14 .
- FIG. 18 is a cross sectional view taken along line 18 - 18 of FIG. 10 .
- FIG. 20 is a cross sectional view taken along line 20 - 20 of FIG. 10 .
- FIG. 21 is a side view similar to FIG. 11 of an alternate bottom piece of the tool.
- FIG. 22 is a bottom view of the alternate bottom piece of the tool taken along line 22 - 22 of FIG. 21 .
- FIG. 23 is a cross sectional view of the alternate bottom piece of the tool taken along line 23 - 23 of FIG. 21 .
- FIG. 24 is a side view of a bell for optional replacement of the bottom piece of the tool.
- FIG. 25 is a cross sectional view of the bell taken along line 25 - 25 of FIG. 24
- FIGS. 26-31 are perspective views of the steps involved in engaging a broken rod string located within a well with the tool.
- FIG. 32 is a perspective view of the tool of FIG. 1 .
- FIG. 33 is an enlarged view of a section of rod string to be fished with the tool.
- FIG. 34 is a top view of the broken rod string taken along line 34 - 34 of FIG. 33
- FIG. 35 is an enlarged side view of a tool that is constructed without a bottom piece.
- FIG. 36 is an enlarged view of the tool and broken rod string from within circle 36 of FIG. 31 .
- a fishing tool 10 for fishing sucker rods 12 , tubing, pipe, etc. from downhole in a well 14 .
- the body of the tool 10 is constructed of parts or pieces 16 , 18 and 20 that are each machined from single pieces of metal stock and provided with threads so that the pieces 16 , 18 , and 20 can be secured together to form the body of the tool 10 .
- the body is comprised of a top piece 16 and a barrel piece 18 , and normally also is provided with a bottom piece 20 .
- a slip 22 is movably retained within the body, as will be more fully described hereafter. The slip 22 serves to hold the rod 12 within the barrel piece 18 of the tool 10 so that the rod 12 or other item to be fished out of the well 14 can be removed from the well 14 by the tool 10 .
- the top piece 16 of the body is constructed of a solid metal stock and is provided with male threads 24 on its top end 26 for securing the tool 10 to a rod string 12 and with male threads 28 on its bottom end 30 for securing the top piece 16 to the barrel piece 18 of the tool 10 .
- the top piece 16 is also provided with a fluid channel 32 extending from the bottom end 30 of the top piece 16 to a flattened wrench flat 34 on the top piece 16 in order to provide fluid communication through the top piece 16 .
- the purpose of the channel 32 is to allow liquids that are trapped either above or below the top piece 16 to move through the channel 32 as the tool 10 is raised and lowered within the well 14 .
- the barrel piece 18 of the body is constructed of hollow tube stock.
- the barrel piece 18 is provided with female threads 35 on its top end 38 for securing the barrel piece 18 to the male threads 28 provided on the bottom end 30 of the top piece 16 and provided with female threads 40 on its bottom end 42 for securing the barrel piece 18 to the bottom piece 20 .
- the barrel piece 18 is machined to provide two parallel, longitudinally oriented grooves 44 in which the slip 22 is movably retained within the barrel piece 18 . These grooves 44 are milled with a rounded radius 46 at each of the edges, as shown in FIG. 20 .
- the rounded radius 46 is employed instead of a pointed or squared off edge because this reduces the stress concentration at this point, thereby allowing the tool 10 to be stronger.
- the slip 22 is inserted into the barrel piece 18 , with matching rounded ears 48 of the slip 22 inserting in the longitudinal grooves 44 before the bottom piece 20 of the body is secured to the barrel piece 18 so that the bottom piece 20 then captures the slip 22 within the barrel piece 18 when the bottom piece 20 is attached to the barrel piece 18 . Having the bottom piece 20 also makes the tool 10 stronger by eliminating a shear plane of a weld at this point.
- the barrel piece 18 is provided with a side opening 50 . As shown in FIGS. 18 and 19 , the walls adjacent to the side opening 50 are parallel with each other, thus allowing a rod coupling to move outward through the side opening 50 , as will be more fully described hereafter.
- the side opening 50 extends down and terminates on its lower end 52 so that its lower end 52 is level with an upper shoulder 54 of the slip 22 when the slip 22 is at its lowest position.
- the slip 22 is shown in its lowest position in FIGS.
- the position of the lower end 52 of the side opening 50 relative to the upper shoulder 54 of the slip 22 when the slip 22 is at its lowest position is important for the proper function of the tool 10 because it insures that when a rod 12 is attached to the tool 10 , the pulling force exerted on the tool 10 is directed vertically on the tool 10 and there is no sideways pull on the tool 10 .
- the body is normally also provided with a bottom piece 20 that attaches at the bottom end 42 of the barrel piece 18 .
- the bottom piece 20 is also constructed of hollow tube stock.
- Male threads 56 are provided on the top end 58 of the bottom piece 20 for engaging the female threads 40 provided on the bottom end 42 of the barrel piece 18 in order to secure the bottom piece 20 to the barrel piece 18 .
- the bottom end 60 of the bottom piece 20 is enlarged externally to help in centering the tool 10 within the well casing or the well 14 and is provided with an internal bevel 62 to aid in feeding rod 12 into the barrel piece 18 of the tool 10 .
- an alternate bottom piece 20 A can be employed that has a lip guide 64 provided in the bevel 62 of the bottom end 60 to facilitate guiding the rod 12 into the tool 10 , particularly when the rod 12 is bent or when the well 14 is filled with debris or scale.
- the optional lip guide 64 provides the tool 10 with the ability to rotate over the parted rod 12 . This is valuable because in most cases the parted rod 12 is up against the side of the inner wall of the tubing 100 . Sometimes it is freely against the wall and can easily move to the center when the tool 10 sides over it to catch it. But sometimes the parted rod 12 is bent or kinked over to the side of the wall, thereby making it more difficult to side over to the center.
- the lip guide 64 provides a gripping surface to rotate the rod 12 over toward the center so that it can more easily enter the tool 10 .
- the bottom piece 20 can be replaced by one of several sizes of existing bells 66 .
- the replacement bell 66 can either be threaded directly onto the female threads 40 provided on the bottom end 42 of the barrel piece 18 if male threads 68 provided on the bell 66 are compatible therewith, or alternately, can be secured to the barrel piece 18 with an appropriate adaptor (not illustrated).
- the bell 66 serves to guide the tool 10 through larger size pipe interiors such as larger tubing sizes or production casing.
- the bell 66 serves to guide the parted rod 12 into the tool 10 and allows the tool 10 to stay centered in the pipe.
- Typical bells sizes are available for 31 ⁇ 2 inch tubing, 41 ⁇ 2 inch casing and 5 1/2 inch casing, but other customized bells sizes can be obtained for up to 85 ⁇ 8 inch casing.
- the tool 10 can be constructed without a bottom piece 20 .
- an alternate barrel piece 18 A is employed which has the longitudinal grooves 44 welded shut at the bottom end 42 A of the alternate barrel piece 18 A to permanently retain the slip 22 within the longitudinal grooves 44 .
- the bottom end 42 A of the alternate barrel piece 18 A is provided internally with a bevel 70 to guide the rod 12 into the tool 10 instead of being threaded.
- the slip 22 is in a half moon shape, with its externally facing wall 72 being convex in shape and its internally facing wall 74 being concave in shape.
- Two ears 48 are provided one on either edge of the external wall 72 of the slip 22 for movable engagement with the longitudinal grooves 44 provided internally within the barrel piece 18 , as previously described and illustrated in FIG. 19 .
- the internal wall 74 of the slip 22 is provided at its bottom edge 76 with a half moon shaped bevel 78 to provide for smooth engagement of the slip 22 with the rod 12 as the rod 12 enters the tool 10 and pushes the slip 22 upward.
- the upper shoulder 54 that is provided in the top end 80 of the slip 22 is square.
- the square shoulder 54 provides a surface against which an expanded surface of the rod 12 , or other item to be pulled, will engage the slip 22 as the tool 10 is raised after the rod 12 has entered the barrel piece 18 and after the slip 22 has moved back downward to its lowest position, as will be more fully explained hereafter.
- an optional slip 22 A can be employed instead of the standard slip 22 .
- the optional slip 22 A is similar to the standard slip 22 except it is provided with a serrated or toothed shoulder 54 A on its top end 80 A instead of a square shoulder 54 .
- the purpose of the teeth 82 or serrations is to resist rotational slippage of the caught rod 12 .
- teeth 82 are milled into a standard slip 22 .
- the teeth 82 are added to allow the tool 10 to more easily be backed-off from downhole. Also, the teeth 82 allow the tool 10 to be more easily used when a rod on/off tool must be unlatched from downhole.
- Some downhole pumps are not pulled out when the rods 12 are pulled out of the well 14 .
- These types of pumps are called tubing pumps. They are installed on the bottom of the tubing 100 and are retrieved from the well 14 when the tubing 100 is retrieved.
- rods 12 are still used. But there is a tool on the bottom of the rod string 12 called a sucker rod on/off tool. This on/off tool latches onto the top of the pump when the rods 12 reach it and stay latched on until it is unlatched. To unlatch from it, the work over rig operator must rotate the rod 12 which unlatches the rod on/off tool.
- the sucker rod fishing tool 10 In order for the sucker rod fishing tool 10 to be able to transfer this rotation to the rod on/off tool, it must resist rotational slippage between the tool 10 and the broken rod 12 .
- the teeth 82 on the top end 80 A of the alternate slip 22 A help resist this slippage.
- insert tubing pumps will become stuck in the tubing 100 , i.e. in the seating nipple. Then the tool 10 may need to be backed off from. In this case the operator rotates the sucker rods 12 counter-clockwise to unscrew the rods 12 or clockwise when a back-off tool with left hand threads is utilized directly above the tool 10 . The tool 10 will also need to resist this rotation in order to be backed off from.
- FIGS. 33 and 34 there is illustrated a section of a typical rod string 12 showing a connection of an upper rod 12 U to a lower rod 12 L via a rod connector or coupling 12 C.
- the coupling 12 C shown in FIG. 33 is a standard coupling since its outside diameter is greater than the outside diameter of the shoulders 90 and 92 of the sucker rod.
- the upper rod 12 U is provided with a rod portion 84 , an enlarged diameter bead 86 , a reduced diameter wrench flat 88 , and an enlarged diameter shoulder 90 .
- the female threaded rod coupling 12 C attaches to male threads (not illustrated) provided on a lower end of the upper rod 12 U so that the coupling 12 C abuts the enlarged diameter shoulder 90 of the upper rod 12 U when the upper rod 12 U is threaded together with the coupling 12 C, as shown in the FIG. 33 .
- the lower rod 12 L is likewise provided with a male threads (not illustrated) provided on the upper end of the lower rod 12 L and with an enlarged diameter shoulder 92 that abuts the coupling 12 when the lower rod 12 L is threaded into the coupling 12 C, as shown in FIG. 33 .
- the lower rod 12 L then has a reduced diameter wrench flat 94 , an enlarged diameter bead 96 and a rod portion 98 .
- This illustration of this section of rod string 12 is provided to help illustrate the enlarged areas 86 , 90 , 12 C, 92 and 96 on a broken rod string 12 that can be caught by the present tool 10 .
- the shoulder 54 of the slip 22 on the present invention can engage an upper or lower bead 86 or 96 of a rod 12 , an upper or lower shoulder 90 or 92 of a rod 12 , or a rod coupling 12 C.
- One limitation of the present tool 10 is that it can not engage the rod portion 84 or 98 of the rod 12 . However, if the rod 12 parts at the rod portion 84 of the rod 12 within ten inches or less distance from above the rod coupling 12 C the present tool 10 can still retrieve it at any of the aforementioned locations 86 , 96 , 90 , 92 , or 12 C. However, as is discussed hereafter, the present tool 10 can be attached with other existing fishing tools to address this limitation.
- FIGS. 26 , 27 , 28 , 29 , 30 , 31 , and 36 the steps involved in fishing a rod 12 from a well 14 with the present tool 10 are illustrated.
- FIG. 26 illustrates the tool 10 being lowered within the well tubing 100 , casing or open hole and approaching the upper end 102 of a broken rod string 12 that is to be fished out of the well 14 .
- FIG. 27 shows the tool 10 lowered further so that there is initial engagement of the upper end 102 of the broken rod string 12 with the bottom piece 20 of the tool 10 .
- This illustration shows how the internal bevel 62 in the bottom piece 20 guides the broken rod string 12 into the tool 10 .
- FIG. 28 shows the tool 10 being lowered still further so that the tool 10 telescopically receives the broken rod string 12 within the tool 10 .
- This figure also shows the initial engagement of the upper end 102 of the broken rod string 12 with the slip 22 .
- FIG. 29 shows the tool 10 lowered further, the broken rod string 12 received further into the tool 10 , and the slip 22 being pushed upward within the barrel piece 18 of the tool 10 by the broken rod string 12 .
- FIG. 30 shows the broken rod string 12 moving into the side opening 50 provided in the barrel piece 18 which allows the slip 22 to slide downward within the barrel piece 18 past enlarged area or areas 86 , 96 , 90 , 92 , or 12 C of the broken rod string 12 until the slip 22 is located at its lowest possible position within the tool 10 . Once the slip 22 has moved into this position, the tool 10 is then ready to be raised.
- the slip 22 is either located at its lowest most position or is still at the top end of the grooves 44 . If the slip 22 is still located at the top end of the grooves 44 , when operator starts to raise or pick up the tool, one of the edges 86 , 96 , 90 , 92 , or 12 C of broken rod 12 will engage the upper shoulder 54 on the slip 22 and drag it back down to its lowest position, i.e. to the bottom end of the grooves 44 . The top ends of the grooves 44 stop short of the upper end of the side opening 50 so that the tool 10 will function properly to allow the parted rod 12 to move upward beyond the top end of the grooves 44 and still exit through the side opening 50 .
- FIG. 31 shows the tool 10 being raised with the broken rod string 12 secured thereto.
- FIG. 36 shows an enlarged view of the relative positions of the tool 10 and the broken rod string 12 illustrated in FIG. 31 .
- the shoulder 54 of the slip 22 engages an enlarged area 86 , 96 , 90 , 92 , or 12 C of the broken rod string 12 that it previously slipped past.
- the enlarged areas 86 , 96 , 90 , 92 , or 12 C of the broken rod string 12 may not all exist on the broken piece left in the well and this depends on where the break takes place. Different sections in different instances will be caught depending on where the break takes place.
- the same enlarged area 86 , 96 , 90 , 92 , or 12 C of the broken rod string 12 will also engage the lower end 52 of the side opening 50 of the barrel piece 18 .
- the lower end 52 of the side opening 50 of the barrel piece 18 and the slip 22 thus function together to capture the broken rod string 12 within the tool 10 and to keep the rod string 12 centered within the tool 10 .
- the shoulder 54 of the slip 22 and the lower end 52 of the side opening 50 of the barrel piece 18 are level at this time. This arrangement is important in that it prevents any sideway force from being exerted on the tool 10 as a pulling force is exerted on the tool 10 in order to pull the broken rod string 12 out of the well 14 .
- One limitation of the present invention is that it, is not able to catch on a rod 12 where the break is at the straight rod portion 84 or 98 of a rod string 12 .
- the present tool 10 can still retrieve it at any of the aforementioned locations 86 , 96 , 90 , 92 , or 12 C.
- the present invention 10 can be coupled with an existing biting type fishing tool, such as an O'Bannon slip socket, in order to additionally catch those types of breaks.
- the top piece 16 of the present tool 10 is removed from the barrel piece 18 and then a bottom half of an O'Bannon tool is removed from its top half.
- the barrel piece 18 of the present tool 10 is attached to the top half of the O'Bannon combination overshot socket tool.
- the barrel piece 18 of the present tool 10 may be attached to the top half of the O'Bannon tool either by directly threading the two parts together if their threads are compatible, or alternately, by employing an adaptor (not illustrated) to secure them together if their respective threads are not compatible.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A fishing tool for fishing sucker rods from a subterranean well. A body of the tool is a machined top piece, a machined barrel piece and normally a machined bottom piece that all thread together. The bottom piece preferably retains a curved cast metal slip movable within grooves milled internally into the body. The slip moves upward to admit a rod into the tool and moves downward to capturing the rod in the tool. A lower end of a side opening provided in the barrel piece is level with an upper shoulder of the slip when the slip is at its lowest position so that the rod engages and is retained by both in the tool. The upper shoulder of the slip can optionally be provided with teeth. The bottom piece can be replaced with a bell and the top piece 16 can be replaced by a prior art fishing tool.
Description
- 1. Field of the Invention
- The present invention relates to a fishing tool for fishing sucker rods, tubing, pipe, pumps, plungers, plugs, tubing stops, packers, tools, anchors, obstructions, etc. from downhole in a subterranean well, such as but not limited to an oil producing, gas producing, injection or disposal well. More specifically, the fishing tool of the present invention is strong enough to retrieve up to 12,000 feet of rod at once, is designed to reduce stress on the tool so that it can be reused multiple times, is serviceable because it can be disassembled and repaired in the field, and is versatile since it can be combined with bells, adapters and other existing types of rod fishing equipment and accessories to successfully retrieve a wide range of items from subterranean wells.
- 2. Description of the Related Art
- Prior art fishing tools generally are of three types: tools that are overshot sockets, tools that bite and tools that are traps. An example of an overshot socket type tool can be found in U.S. Pat. No. 1,869,861 issued to O'Bannon. These socket type of tools are designed to telescope over the part left in the well and interlock therewith to permit withdrawal of the part from the well by the tool. One problem with the socket type tools is that they are designed to catch only on specific shaped items and therefore are limited in the types of items with which they can interlock. Also, the proper socket size must be used for the item to be fished. When the item shape and size is unknown, the operator must play a guessing game to find a socket that is the proper size to work. This often results in the several different sizes of sockets having to be run into the well before the proper socket size can be found. This is expensive in terms of time and manpower to try again and again to get the proper socket size for the specific situation. Furthermore the sockets have a tendency of slipping open when hardened, hard lined, brass, out of round or worn couplings are being fished. Lastly, the sockets generally last for only one or two uses and become worn easily.
- The second type is a biter type tool. The biting type of tool is also known as a slip socket which should not be confused with the overshot socket type tool. An example of a biter type tool can be found in U.S. Pat. Nos. 1,620,382 and 1,620,383 issued to O'Bannon. These biter types of tools are designed to receive the part left in the well within biting members, such as collets, which can be moved inward to bite into the part to attach the part to the tool in order to permit withdrawal of the part from the well by the tool. One problem with the biter type tools is that they are attempting to bite into a hard surface and therefore can slip. Also, the teeth of the biter type tool are only designed to catch the round rod body section of a sucker rod, and not the other items such as the bead, wrench flat, pin shoulder, pin thread or coupling. Furthermore the teeth on the slips generally only last for one or two uses before becoming worn off. Therefore the slips need to be replaced often between uses.
- The third type is a trap type tool. These trap type tools have a mechanism that traps the part inside the tool so that the part is captured therein and can be removed from the well with the tool. An example of a trap type tool is taught in U.S. Pat. No. 1,634,935 issued to Donnelly. In that patent, a hinged lift is provided within the tool so that after a shoulder of the part passes the lift, the lift springs back downward and traps the part within the tool. The lift of this invention is weak. Also, the tool is limited on the sizes of rods it can catch, limited on where it can catch the rod. The tool can become wedged and therefore limits the amount of pressure that this tool can exert when pulling an item from a well.
- Another example of a trap type tool is taught in U.S. Pat. No. 1,720,692 issued to Reynolds et al. This invention employs a slip which is pushed upward within the tool as the item enters the tool and then slides back downward below a shoulder of the item as the item moves upward and away from the slip through an opening provided in the side of the tool. By sliding under the shoulder of the item, the slip traps the item within the tool as the tool is raised within the well, thereby allowing the item to be removed from the well by the tool.
- The prior art mousetrap tools have several problems. First, because this type of tool is welded together, the barrel of this type of tool is weak and can not withstand large lateral strains such as those imposed on it when the slip and the item being pulled are wedge between the walls of the barrel. Also, the top of this type of tool is also welded to the barrel portion and this creates another weak area where the tool will break. A further problem with this type of tool is that the side opening provided in the barrel of the tool is located above the shoulder of the slip, causing the item to create a sideways pull and torque moment on the tool as the item is pulled. This torque moment imposes stress on the tool that causes the barrel of the tool to split open and fail. Still a further problem with this tool is that it can not be made in the sizes that are needed in the field. The geometry of the tool makes the walls too thin to hold the weight and tension of the rod string being pulled from the well. The rod string is also known as simply the rod, as working string, wire line tool string, or as tool string. A further problem with the tool is the way in which the slip is retained within the barrel of the tool. The slip is retained by shoulders that project into the barrel of the tool and retain the slip therein. There are two ways in which these shoulders are constructed, both of which are described in the Reynolds et al. patent. The first way is to mill slots into the interior surface of the barrel and then weld key stock into the slots to form the shoulders. The other way is to roll over the edges of two halves of the metal that will form the two halves of the barrel and then weld the two halves together to form the barrel with the rolled over edges forming the internal shoulders inside the barrel. The problem with these shoulders is that they can become bent and can prevent the slip from moving up and down within the barrel of the tool. When this happens, the tool is unable to attach to a rod and can not fish rod out of the well. Because the shoulders of prior art tools are either welded within the tool or formed as an integral part of the barrel of the tool, once they become damaged, they can not be economically repaired or replaced. This results in the tool no longer being functional and the tool must then be discarded.
- Because of all these weaknesses in this tool, it generally will only be a single use tool and it can only pull approximately 5,000 pounds of force without breaking.
- The present invention is a trap tool that addresses the problems found in prior art fishing tools. The design of the present tool is much stronger, has less stress concentrations, and no bending moments or torque when pulling. The present invention has increased wall thickness, is made of single pieces of metal that are threaded together or otherwise removably connected together instead of being welded together, and is designed to create a straight upward pull on the tool instead of a sideways force when pulling an item out of a well. Therefore, it can retrieve up to approximately 12,000 feet of rods at a time without breaking or withstand approximately 40,000 pounds of tension. The present tool is durable, reusable, reliable, has a long service life.
- The cross sectional geometry design of the present invention allows for critical sizes to be made and allows a variety of sizes to be offered. In fact, nine sizes of the invention will be made available to the purchasing public. This allows the invention to be constructed so that it can fish ¾ inch to ⅞ inch SH or slim hole couplings in 2⅜ inch tubing which is not possible with prior art tools. Slim hole couplings have the same outside diameter as the shoulder on the sucker rod whereas standard couplings have outside diameters that are larger than the shoulder of the sucker rod.
- The present invention is a catch-all design that does not require the use of multiple sizes of sockets, such as required by overshot socket types of fishing tools. The present tool eliminates the need for oversized tools, sockets, grapples and overshots.
- Further, this tool will catch hard lined couplings, fiberglass, worn or out of round couplings. This tool is provided with a threaded bottom end so that a variety of sizes of bells or adaptors can be employed with the tool. This tool can fish trashy rods from a well when an optional bottom piece with lip guide is used with the tool that assists in feeding the rods into the tool. The lip guide also allows the fishing tool to be utilized in horizontal wells. In horizontal wells the lip guide will guide the broken rod into the tool by rotating the tool from the surface. The lip will catch the rod and pull it over to the center of the fishing tool.
- The design of the present tool allows it to be made with a smaller outer diameter which allows it to fit through crimped or bend tubing or tubing that is filled with scale or debris. Also the smaller diameter allows for fluid to more freely flow around the outer diameter of the tool. The design of the present tool allows the tool to be screwed apart so that additional features can be added to the tool and each part of the tool can be replaced or repaired in the field. Because the present tool is constructed of parts that thread together, the top portion of the tool can be removed and the tool can be attached to another tool, such as for example the O'Bannon biting type tool previously discussed, so that the two tools can be employed together, when it is desirable to do so.
- Some operators will leave this fishing tool in the tubing during pumping. This is generally done when a rod is parted and the tool is deployed to fish the parted rod. Then, for some reason such as a stuck insert pump, time constraints, or for other reasons the tool is left in the tubing while latched onto the broken rod and the well is simply put back on to production with the tool being utilized as a coupler to mend the parted rod. Then the tool is retrieved the next time the well is pulled or when the tubing and or sucker rods must be pulled. This type of use will occur with this tool.
- The present invention is also economical because it is reusable, field servable, and it is competitively priced. The present invention is also economical because it can produce a cost savings of approximately $10,000 to $30,000 per job on a deep well.
- The present invention is a fishing tool for fishing sucker rods, tubing, pipe, pumps, plungers, plugs, tubing stops, packers, tools, anchors, obstructions, etc. from downhole in a subterranean well. The tool functions by trapping a broken sucker rod or other item to be fished out of the well within a barrel part of the tool's body by means of a combination of a movable slip provided within the barrel part and a side opening provided in the barrel part. The body of the tool is constructed of parts that are each machined from single pieces of metal stock and provided with threads so that the pieces can be secured together to form the body. The body is comprised of a top piece and a barrel piece, and normally also is provided with a bottom piece. A slip, preferable constructed of cast metal, is movably retained within the body. The slip serves to hold the rod within the barrel piece of the tool so that the rod or other item to be fished out of the well can be removed from the well by the tool.
- The top piece of the body is constructed of a solid metal stock and is provided with male threads on its top end for securing the tool to a rod string and with male threads on its bottom end for securing the top piece to the barrel piece of the tool. The top piece is also provided with a fluid channel extending from the bottom of the top piece to a flattened wrench flat on the top piece in order to provide fluid communication through the top piece. The purpose of the channel is to allow liquids that are trapped either above or below the top piece to move through the channel as the tool is raised and lowered within the well tubing of the well.
- The barrel piece of the body is constructed of hollow tube stock. The barrel piece is provided with female threads on its top end for securing the barrel piece to the male threads provided on the bottom end of the top piece and provided with female threads on its bottom end for securing the barrel piece to the bottom piece. Internally the barrel is machined to provide two parallel, longitudinally oriented grooves in which the slip is movably retained within the barrel. The slip is inserted into the barrel with ears of the slip inserting in the longitudinal grooves before the bottom piece of the body is secured to the barrel piece so that the bottom piece then captures the slip within the barrel portion when the bottom piece is attached to the barrel piece. Because the bottom piece secures the slip within the barrel, in order to replace the slip, the bottom piece is unthreaded from the barrel piece and then the slip can readily be removed from the barrel and replaced, if desired.
- The barrel piece is provided with a side opening that extends down and terminates on its lower end so that its lower end is level with the upper shoulder of the slip when the slip is at its lowest position. The position of the lower end of the side opening relative to the upper shoulder of the slip at it's lowest position is important for the proper function of the tool because it insures that when a rod is attached to the tool, the pulling force is directed vertically on the tool and there is no sideways pull on the tool.
- The body is normally also provided with a bottom piece, although, the bottom of the barrel piece can optionally be welded shut to permanently retain the slip within the longitudinal grooves and the bottom of the barrel piece can be internally beveled instead of being provided with female threads at its bottom end.
- However, the normal configuration is to have a bottom piece attached at the bottom end of the barrel piece. The bottom piece is also constructed of hollow tube stock. The top end of the bottom piece is provided with male threads for engaging the female threads provided on the bottom end of the barrel piece in order to secure the bottom piece to the barrel piece. The bottom end of the bottom piece is enlarged externally to help in centering the tool within the tubing and is beveled internally to aid in feeding rod into the barrel of the tool.
- Optionally, the bottom piece can be replaced by one of several sizes of existing bells. The bell can either be threaded directly onto the female threads provided on the bottom end of the barrel piece if the bell is provided with male threads that are compatible therewith, or alternately, can be secured to the barrel piece with an appropriate adaptor. The bell serves to guide the tool through larger size pipe interiors such as larger tubing sizes or production casing. The bell serves to guide the parted rod into the tool and allows the tool to stay centered in the pipe.
- The slip is in a half moon shape, with its externally facing wall convex in shape and its internally facing wall concave in shape. Two ears are provided on the external surface of the slip for movable engagement with the longitudinal grooves provided internally within the barrel, as previously described. The bottom edge of the slip is beveled on its internally face in a half moon configuration to provide for smooth engagement of the slip with the rod as the rod enters the tool and pushes the slip upward. The top end of the slip is provided with a square shoulder against which an expanded surface of the rod or other item to be pulled will engage the slip as the tool is raised, as will be further described herein.
- An optional slip can be employed instead of the standard slip. The optional slip is provided with a serrated or toothed shoulder on its top end instead of a square shoulder. The purpose of the teeth or serrations is to resist rotational slippage of the caught rod. The teeth are milled into a standard slip and are added to allow the tool to more easily be backed-off from downhole. Also, the teeth allow the tool to be more easily used when a rod on/off tool must be unlatched from downhole.
- Depending on where the break in the rod string occurs, the shoulder of the slip on the present invention can engage any enlarged area of the broken rod string, including an upper or lower bead of a rod, an upper or lower shoulder of a rod, or a rod coupling.
- One limitation of the present invention is that it is not able to catch on a straight rod if the rod is parted more then ten inches above a rod coupling. However, the present invention can be coupled with an existing biting type fishing tool, such as an O'Bannon slip socket, in order to additionally catch those types of breaks. As previously stated, the biting type of tool is also known as a slip socket.
- In order to attach a biting type fishing tool such as the O'Bannon device to the present invention, first the top piece of the present invention is removed from the barrel piece and then the bottom piece of an O'Bannon type combination overshot socket device is removed from its top piece. Next, the barrel piece of the present invention is attached to the top piece of the O'Bannon type device. The barrel piece of the present invention may be attached to the top of piece of the O'Bannon type device either by directly threading the two parts together if their threads are compatible, or alternately, by employing an adaptor to secure them together if their threads are not compatible.
-
FIG. 1 is a side view of a fishing tool for fishing sucker rods out of a well constructed in accordance with a preferred embodiment of the present invention. -
FIG. 2 is a front view of the tool taken along line 2-2 ofFIG. 1 . -
FIG. 3 is an enlarged view of the top piece of the tool associated withnumeral 3 ofFIG. 1 shown removed from the tool. -
FIG. 4 is a front view of the top piece of the tool taken along line 4-4 ofFIG. 3 . -
FIG. 5 is a top view of the top piece of the tool taken along line 5-5 ofFIG. 3 . -
FIG. 6 is a bottom view to the top piece of the tool taken along line 6-6 ofFIG. 3 . -
FIG. 7 is a cross sectional view taken along line 7-7 ofFIG. 4 . -
FIG. 8 is a cross sectional view taken along line 8-8 ofFIG. 4 . -
FIG. 9 is a side view of the barrel piece of the tool associated withnumeral 9 ofFIG. 1 shown removed from the tool. -
FIG. 10 is a front view of the barrel piece of the tool taken along line 10-10 ofFIG. 9 . -
FIG. 11 is a side view of the bottom piece of the tool associated withnumeral 11 ofFIG. 1 shown removed from the tool. -
FIG. 12 is a bottom view of the bottom piece of the tool taken along line 12-12 ofFIG. 11 . -
FIG. 13 is a cross sectional view of the bottom piece of the tool taken along line 13-13 ofFIG. 11 . -
FIG. 14 is a front view of the slip of the tool associated withnumeral 14 ofFIG. 2 shown removed from the tool. -
FIG. 14A is a perspective view of the slip ofFIG. 14 . -
FIG. 14B is a perspective view of an alternate slip. -
FIG. 15 is a top view of the slip taken along line 15-15 ofFIG. 14 . -
FIG. 16 is a cross sectional view of the slip taken along line 16-16 ofFIG. 14 . -
FIG. 17 is a cross sectional view taken along line 17-17 ofFIG. 10 . -
FIG. 18 is a cross sectional view taken along line 18-18 ofFIG. 10 . -
FIG. 19 is a cross sectional view taken along line 19-19 ofFIG. 10 with the slip shown in outline to indicate where it would normally be located. -
FIG. 20 is a cross sectional view taken along line 20-20 ofFIG. 10 . -
FIG. 21 is a side view similar toFIG. 11 of an alternate bottom piece of the tool. -
FIG. 22 is a bottom view of the alternate bottom piece of the tool taken along line 22-22 ofFIG. 21 . -
FIG. 23 is a cross sectional view of the alternate bottom piece of the tool taken along line 23-23 ofFIG. 21 . -
FIG. 24 is a side view of a bell for optional replacement of the bottom piece of the tool. -
FIG. 25 is a cross sectional view of the bell taken along line 25-25 ofFIG. 24 -
FIGS. 26-31 are perspective views of the steps involved in engaging a broken rod string located within a well with the tool. -
FIG. 32 is a perspective view of the tool ofFIG. 1 . -
FIG. 33 is an enlarged view of a section of rod string to be fished with the tool. -
FIG. 34 is a top view of the broken rod string taken along line 34-34 ofFIG. 33 FIG. 35 is an enlarged side view of a tool that is constructed without a bottom piece. -
FIG. 36 is an enlarged view of the tool and broken rod string from withincircle 36 ofFIG. 31 . - Referring now to drawings and initially to
FIGS. 1 , 2, 26 and 32, there is illustrated afishing tool 10 forfishing sucker rods 12, tubing, pipe, etc. from downhole in awell 14. The body of thetool 10 is constructed of parts orpieces pieces tool 10. As shown inFIGS. 1 and 2 , the body is comprised of atop piece 16 and abarrel piece 18, and normally also is provided with abottom piece 20. Aslip 22, preferable constructed of cast metal, is movably retained within the body, as will be more fully described hereafter. Theslip 22 serves to hold therod 12 within thebarrel piece 18 of thetool 10 so that therod 12 or other item to be fished out of the well 14 can be removed from the well 14 by thetool 10. - Referring now to
FIGS. 3 , 4, 5, 6, 7, and 8, thetop piece 16 of the body is constructed of a solid metal stock and is provided withmale threads 24 on itstop end 26 for securing thetool 10 to arod string 12 and withmale threads 28 on itsbottom end 30 for securing thetop piece 16 to thebarrel piece 18 of thetool 10. Thetop piece 16 is also provided with afluid channel 32 extending from thebottom end 30 of thetop piece 16 to a flattened wrench flat 34 on thetop piece 16 in order to provide fluid communication through thetop piece 16. The purpose of thechannel 32 is to allow liquids that are trapped either above or below thetop piece 16 to move through thechannel 32 as thetool 10 is raised and lowered within thewell 14. - Referring to
FIGS. 9 , 10, 17, 18, 19 and 20, thebarrel piece 18 of the body is constructed of hollow tube stock. Thebarrel piece 18 is provided withfemale threads 35 on itstop end 38 for securing thebarrel piece 18 to themale threads 28 provided on thebottom end 30 of thetop piece 16 and provided withfemale threads 40 on itsbottom end 42 for securing thebarrel piece 18 to thebottom piece 20. Internally thebarrel piece 18 is machined to provide two parallel, longitudinally orientedgrooves 44 in which theslip 22 is movably retained within thebarrel piece 18. Thesegrooves 44 are milled with arounded radius 46 at each of the edges, as shown inFIG. 20 . The roundedradius 46 is employed instead of a pointed or squared off edge because this reduces the stress concentration at this point, thereby allowing thetool 10 to be stronger. Theslip 22 is inserted into thebarrel piece 18, with matchingrounded ears 48 of theslip 22 inserting in thelongitudinal grooves 44 before thebottom piece 20 of the body is secured to thebarrel piece 18 so that thebottom piece 20 then captures theslip 22 within thebarrel piece 18 when thebottom piece 20 is attached to thebarrel piece 18. Having thebottom piece 20 also makes thetool 10 stronger by eliminating a shear plane of a weld at this point. - Because the
bottom piece 20 secures theslip 22 within thebarrel piece 18, in order to replace theslip 22, thebottom piece 20 is unthreaded from thebarrel piece 18 and then theslip 22 can readily be removed from thebarrel piece 18 and replaced, if desired. Thebarrel piece 18 is provided with aside opening 50. As shown inFIGS. 18 and 19 , the walls adjacent to theside opening 50 are parallel with each other, thus allowing a rod coupling to move outward through theside opening 50, as will be more fully described hereafter. Theside opening 50 extends down and terminates on itslower end 52 so that itslower end 52 is level with anupper shoulder 54 of theslip 22 when theslip 22 is at its lowest position. Theslip 22 is shown in its lowest position inFIGS. 1 , 2, 26, 27, 28, 30, 31, and 36. The position of thelower end 52 of theside opening 50 relative to theupper shoulder 54 of theslip 22 when theslip 22 is at its lowest position is important for the proper function of thetool 10 because it insures that when arod 12 is attached to thetool 10, the pulling force exerted on thetool 10 is directed vertically on thetool 10 and there is no sideways pull on thetool 10. - Referring to
FIGS. 11 , 12, and 13, the body is normally also provided with abottom piece 20 that attaches at thebottom end 42 of thebarrel piece 18. Thebottom piece 20 is also constructed of hollow tube stock.Male threads 56 are provided on thetop end 58 of thebottom piece 20 for engaging thefemale threads 40 provided on thebottom end 42 of thebarrel piece 18 in order to secure thebottom piece 20 to thebarrel piece 18. Thebottom end 60 of thebottom piece 20 is enlarged externally to help in centering thetool 10 within the well casing or the well 14 and is provided with aninternal bevel 62 to aid in feedingrod 12 into thebarrel piece 18 of thetool 10. - Optionally, as illustrated in
FIGS. 21 , 22 and 23, analternate bottom piece 20A can be employed that has alip guide 64 provided in thebevel 62 of thebottom end 60 to facilitate guiding therod 12 into thetool 10, particularly when therod 12 is bent or when the well 14 is filled with debris or scale. Theoptional lip guide 64 provides thetool 10 with the ability to rotate over the partedrod 12. This is valuable because in most cases the partedrod 12 is up against the side of the inner wall of thetubing 100. Sometimes it is freely against the wall and can easily move to the center when thetool 10 sides over it to catch it. But sometimes the partedrod 12 is bent or kinked over to the side of the wall, thereby making it more difficult to side over to the center. Thelip guide 64 provides a gripping surface to rotate therod 12 over toward the center so that it can more easily enter thetool 10. - Also, as illustrated in
FIGS. 24 and 25 , thebottom piece 20 can be replaced by one of several sizes of existingbells 66. Thereplacement bell 66 can either be threaded directly onto thefemale threads 40 provided on thebottom end 42 of thebarrel piece 18 ifmale threads 68 provided on thebell 66 are compatible therewith, or alternately, can be secured to thebarrel piece 18 with an appropriate adaptor (not illustrated). Thebell 66 serves to guide thetool 10 through larger size pipe interiors such as larger tubing sizes or production casing. Thebell 66 serves to guide the partedrod 12 into thetool 10 and allows thetool 10 to stay centered in the pipe. Typical bells sizes are available for 3½ inch tubing, 4½ inch casing and 5 1/2 inch casing, but other customized bells sizes can be obtained for up to 8⅝ inch casing. - As illustrated in
FIG. 35 , alternately thetool 10 can be constructed without abottom piece 20. In this optional configuration, analternate barrel piece 18A is employed which has thelongitudinal grooves 44 welded shut at thebottom end 42A of thealternate barrel piece 18A to permanently retain theslip 22 within thelongitudinal grooves 44. Also, thebottom end 42A of thealternate barrel piece 18A is provided internally with a bevel 70 to guide therod 12 into thetool 10 instead of being threaded. - Referring to
FIGS. 14 , 14A, 15 and 16, theslip 22 is in a half moon shape, with its externally facingwall 72 being convex in shape and its internally facingwall 74 being concave in shape. Twoears 48 are provided one on either edge of theexternal wall 72 of theslip 22 for movable engagement with thelongitudinal grooves 44 provided internally within thebarrel piece 18, as previously described and illustrated inFIG. 19 . Also, theinternal wall 74 of theslip 22 is provided at itsbottom edge 76 with a half moon shapedbevel 78 to provide for smooth engagement of theslip 22 with therod 12 as therod 12 enters thetool 10 and pushes theslip 22 upward. As previously described, theupper shoulder 54 that is provided in thetop end 80 of theslip 22 is square. Thesquare shoulder 54 and provides a surface against which an expanded surface of therod 12, or other item to be pulled, will engage theslip 22 as thetool 10 is raised after therod 12 has entered thebarrel piece 18 and after theslip 22 has moved back downward to its lowest position, as will be more fully explained hereafter. - As illustrated in
FIG. 14B , anoptional slip 22A can be employed instead of thestandard slip 22. Theoptional slip 22A is similar to thestandard slip 22 except it is provided with a serrated ortoothed shoulder 54A on itstop end 80A instead of asquare shoulder 54. The purpose of theteeth 82 or serrations is to resist rotational slippage of the caughtrod 12. To create thealternate slip 22A,teeth 82 are milled into astandard slip 22. Theteeth 82 are added to allow thetool 10 to more easily be backed-off from downhole. Also, theteeth 82 allow thetool 10 to be more easily used when a rod on/off tool must be unlatched from downhole. - Some downhole pumps are not pulled out when the
rods 12 are pulled out of the well 14. These types of pumps are called tubing pumps. They are installed on the bottom of thetubing 100 and are retrieved from the well 14 when thetubing 100 is retrieved. However,rods 12 are still used. But there is a tool on the bottom of therod string 12 called a sucker rod on/off tool. This on/off tool latches onto the top of the pump when therods 12 reach it and stay latched on until it is unlatched. To unlatch from it, the work over rig operator must rotate therod 12 which unlatches the rod on/off tool. In order for the suckerrod fishing tool 10 to be able to transfer this rotation to the rod on/off tool, it must resist rotational slippage between thetool 10 and thebroken rod 12. Theteeth 82 on thetop end 80A of thealternate slip 22A help resist this slippage. - In some cases insert tubing pumps will become stuck in the
tubing 100, i.e. in the seating nipple. Then thetool 10 may need to be backed off from. In this case the operator rotates thesucker rods 12 counter-clockwise to unscrew therods 12 or clockwise when a back-off tool with left hand threads is utilized directly above thetool 10. Thetool 10 will also need to resist this rotation in order to be backed off from. - Referring to
FIGS. 33 and 34 , there is illustrated a section of atypical rod string 12 showing a connection of anupper rod 12U to alower rod 12L via a rod connector orcoupling 12C. Thecoupling 12C shown inFIG. 33 is a standard coupling since its outside diameter is greater than the outside diameter of theshoulders FIG. 33 and moving downward, theupper rod 12U is provided with arod portion 84, anenlarged diameter bead 86, a reduced diameter wrench flat 88, and anenlarged diameter shoulder 90. The female threadedrod coupling 12C attaches to male threads (not illustrated) provided on a lower end of theupper rod 12U so that thecoupling 12C abuts theenlarged diameter shoulder 90 of theupper rod 12U when theupper rod 12U is threaded together with thecoupling 12C, as shown in theFIG. 33 . - Still referring to
FIG. 33 , and moving below thecoupling 12C, thelower rod 12L is likewise provided with a male threads (not illustrated) provided on the upper end of thelower rod 12L and with anenlarged diameter shoulder 92 that abuts thecoupling 12 when thelower rod 12L is threaded into thecoupling 12C, as shown inFIG. 33 . Thelower rod 12L then has a reduced diameter wrench flat 94, anenlarged diameter bead 96 and arod portion 98. This illustration of this section ofrod string 12 is provided to help illustrate theenlarged areas broken rod string 12 that can be caught by thepresent tool 10. - Depending on where the break in the
rod string 12 occurs, theshoulder 54 of theslip 22 on the present invention can engage an upper orlower bead rod 12, an upper orlower shoulder rod 12, or arod coupling 12C. One limitation of thepresent tool 10 is that it can not engage therod portion rod 12. However, if therod 12 parts at therod portion 84 of therod 12 within ten inches or less distance from above therod coupling 12C thepresent tool 10 can still retrieve it at any of theaforementioned locations present tool 10 can be attached with other existing fishing tools to address this limitation. - Referring now to
FIGS. 26 , 27, 28, 29, 30, 31, and 36, the steps involved in fishing arod 12 from a well 14 with thepresent tool 10 are illustrated.FIG. 26 illustrates thetool 10 being lowered within thewell tubing 100, casing or open hole and approaching theupper end 102 of abroken rod string 12 that is to be fished out of the well 14. -
FIG. 27 shows thetool 10 lowered further so that there is initial engagement of theupper end 102 of thebroken rod string 12 with thebottom piece 20 of thetool 10. This illustration shows how theinternal bevel 62 in thebottom piece 20 guides thebroken rod string 12 into thetool 10. -
FIG. 28 shows thetool 10 being lowered still further so that thetool 10 telescopically receives thebroken rod string 12 within thetool 10. This figure also shows the initial engagement of theupper end 102 of thebroken rod string 12 with theslip 22. -
FIG. 29 shows thetool 10 lowered further, thebroken rod string 12 received further into thetool 10, and theslip 22 being pushed upward within thebarrel piece 18 of thetool 10 by thebroken rod string 12. -
FIG. 30 shows thebroken rod string 12 moving into theside opening 50 provided in thebarrel piece 18 which allows theslip 22 to slide downward within thebarrel piece 18 past enlarged area orareas broken rod string 12 until theslip 22 is located at its lowest possible position within thetool 10. Once theslip 22 has moved into this position, thetool 10 is then ready to be raised. - Another way that the
tool 10 can catch abroken rod sting 12 will be described. When therod 12 enters thetool 10, it pushes theslip 22 upward to the uppermost position of theslip 22, i.e. at the top end of thegrooves 44. As thetool 10 travels further downward within the well 14, therod 12 travels upward within thetool 10 and along theslip 22. Therod 12 then exits theside opening 50 as thetool 10 continues moving downward. Thetool 10 continues to move downward until the brokenupper end 102 of therod 12 contacts thetop piece 16. When theend 102 contacts thetop piece 16, thetool 10 stops moving downward which signals the operator to begin raising thetool 10 within thewell 14. At this point theslip 22 is either located at its lowest most position or is still at the top end of thegrooves 44. If theslip 22 is still located at the top end of thegrooves 44, when operator starts to raise or pick up the tool, one of theedges broken rod 12 will engage theupper shoulder 54 on theslip 22 and drag it back down to its lowest position, i.e. to the bottom end of thegrooves 44. The top ends of thegrooves 44 stop short of the upper end of theside opening 50 so that thetool 10 will function properly to allow the partedrod 12 to move upward beyond the top end of thegrooves 44 and still exit through theside opening 50. -
FIG. 31 shows thetool 10 being raised with thebroken rod string 12 secured thereto.FIG. 36 shows an enlarged view of the relative positions of thetool 10 and thebroken rod string 12 illustrated inFIG. 31 . Referring toFIG. 36 , as thetool 10 is initially moved upward, theshoulder 54 of theslip 22 engages anenlarged area broken rod string 12 that it previously slipped past. Theenlarged areas broken rod string 12 may not all exist on the broken piece left in the well and this depends on where the break takes place. Different sections in different instances will be caught depending on where the break takes place. Simultaneously, the sameenlarged area broken rod string 12 will also engage thelower end 52 of theside opening 50 of thebarrel piece 18. Thelower end 52 of theside opening 50 of thebarrel piece 18 and theslip 22 thus function together to capture thebroken rod string 12 within thetool 10 and to keep therod string 12 centered within thetool 10. Theshoulder 54 of theslip 22 and thelower end 52 of theside opening 50 of thebarrel piece 18 are level at this time. This arrangement is important in that it prevents any sideway force from being exerted on thetool 10 as a pulling force is exerted on thetool 10 in order to pull thebroken rod string 12 out of the well 14. - One limitation of the present invention is that it, is not able to catch on a
rod 12 where the break is at thestraight rod portion rod string 12. However, if the rod parts at thestraight rod portion 84 of therod 12 within ten inches or less fromabove rod coupling 12C thepresent tool 10 can still retrieve it at any of theaforementioned locations present invention 10 can be coupled with an existing biting type fishing tool, such as an O'Bannon slip socket, in order to additionally catch those types of breaks. - In order to attach a biting type tool such as the O'Bannon device to the present invention, first the
top piece 16 of thepresent tool 10 is removed from thebarrel piece 18 and then a bottom half of an O'Bannon tool is removed from its top half. Next, thebarrel piece 18 of thepresent tool 10 is attached to the top half of the O'Bannon combination overshot socket tool. Thebarrel piece 18 of thepresent tool 10 may be attached to the top half of the O'Bannon tool either by directly threading the two parts together if their threads are compatible, or alternately, by employing an adaptor (not illustrated) to secure them together if their respective threads are not compatible. - While the invention has been described with a certain degree of particularity, it is manifest that many changes may be made in the details of construction and the arrangement of components without departing from the spirit and scope of this disclosure. It is understood that the invention is not limited to the embodiments set forth herein for the purposes of exemplification, but is to be limited only by the scope of the attached claim or claims, including the full range of equivalency to which each element thereof is entitled.
Claims (25)
1. A sucker rod fishing tool for fishing sucker rod out of a well comprising:
a top piece, said top piece provided with threads on its top end for threadable engagement with a means for moving the top piece into and out of a well,
a hollow barrel piece, said barrel piece provided with threads on its top end for threadable engagement with threads provided on a bottom end of said top piece, said barrel piece provided with a side opening,
a curved slip slidably captured within said hollow barrel piece so that said slip can move longitudinally within the barrel piece, and
a bottom end of the side opening in the barrel piece being level with a top shoulder provided on the slip when the slip is located at its lowest position in the barrel piece so that an object being lifted by the tool will engage the top shoulder of the slip and the bottom end of the side opening in the barrel piece resulting in a downwardly exerted pulling force on the tool.
2. (canceled)
3. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
said barrel piece provided with at least two parallel grooves milled into its interior wall; ears provided on said slip: said ears slidably retained within the parallel grooves as a means of movably retaining the slip within the barrel piece.
4. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 3 wherein said grooves and said ears on the slip are both provided with a rounded radius to reduce stress on the barrel piece.
5. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
said top piece provided with a channel therethrough for allowing liquids to pass through the top piece as the top piece is moved into and out of a well.
6. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
a bottom end of said barrel piece provided with an internal bevel to aid in admitting a sucker rod into the barrel piece, and a weld provided at a bottom end of the grooves to retain the slip therein.
7. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
a bell removably attached to the bottom end of said barrel piece via, threads on its top end that threadably engage threads provided on a bottom end of said barrel piece, and said a bottom end of said bell provided with an internal bevel to aid in admitting a sucker rod into the barrel piece.
8. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
a bottom edge of the slip provided with a bevel on its internal face, said bevel having a half moon configuration to provide for smooth engagement of the slip with a sucker rod as the rod enters the barrel piece and pushes the slip upward.
9. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
a top end of said slip provided with teeth for engaging a sucker rod to prevent rotational slippage therebetween.
10. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 1 further comprising:
a bottom piece, said bottom piece provided with threads on its top end for threadable engagement with threads provided on a bottom end of said barrel piece, and said a bottom end of said bottom piece provided with an internal bevel to aid in admitting a sucker rod into the bottom piece.
11. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 10 further comprising:
said bottom end of said bottom piece provided with a lip guide to aid in admitting a sucker rod into the bottom piece.
12. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 10 wherein the top piece is made from a single solid piece of metal, the barrel piece is made from a single piece of metal tube, the bottom piece is made from a single piece of metal tube, and the slip is made from cast metal.
13. (canceled)
14. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 further comprising:
a bottom piece, said bottom piece provided with threads on its top end for threadable engagement with threads provided on a bottom end of said barrel piece, and said a bottom end of said bottom piece provided with an internal bevel to aid in admitting a sucker rod into the bottom piece.
15. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 14 wherein the top piece is made from a single solid piece of metal, the barrel piece is made from a single piece of metal tube, and the bottom piece is made from a single piece of metal tube.
16. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 15 further comprising:
said bottom end of said bottom piece provided with a lip guide to aid in admitting a sucker rod into the bottom piece.
17. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 wherein the top piece is made from a single solid piece of metal and the barrel piece is made from a single piece of metal tube.
18. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 17 further comprising:
said barrel piece provided with at least two parallel grooves milled into its interior wall for slidably retaining ears provided on said slip.
19. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 18 wherein said grooves and said ears on the slip are both provided with a rounded radius to reduce stress on the barrel piece.
20. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 further comprising:
said top piece provided with a channel therethrough for allowing liquids to pass through the top piece as the top piece is moved into and out of a well.
21. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 further comprising:
a bottom end of said barrel piece provided with an internal bevel to aid in admitting a sucker rod into the barrel piece, and a weld provided at a bottom end of the grooves to retain the slip therein.
22. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 further comprising:
a bell, said bell provided with threads on its top end for threadable engagement with threads provided on a bottom end of said barrel piece, and said a bottom end of said bell provided with an internal bevel to aid in admitting a sucker rod into the barrel piece
23. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 2 further comprising:
a bottom edge of the slip provided with a bevel on its internal face, said bevel having a half moon configuration to provide for smooth engagement of the slip with a sucker rod as the rod enters the barrel piece and pushes the slip upward.
24. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 23 further comprising:
a top end of said slip provided with teeth for engaging a sucker rod to prevent rotational slippage therebetween.
25. A sucker rod fishing tool for fishing sucker rod out of a well according to claim 23 wherein the slip is made from cast metal.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/786,699 US20080252088A1 (en) | 2007-04-12 | 2007-04-12 | Sucker rod fishing tool |
PCT/US2007/013324 WO2008127258A1 (en) | 2007-04-12 | 2007-06-06 | Sucker rod fishing tool |
US12/368,008 US20090146442A1 (en) | 2007-04-12 | 2009-02-09 | Sucker rod fishing tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/786,699 US20080252088A1 (en) | 2007-04-12 | 2007-04-12 | Sucker rod fishing tool |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/368,008 Continuation-In-Part US20090146442A1 (en) | 2007-04-12 | 2009-02-09 | Sucker rod fishing tool |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080252088A1 true US20080252088A1 (en) | 2008-10-16 |
Family
ID=39853043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/786,699 Abandoned US20080252088A1 (en) | 2007-04-12 | 2007-04-12 | Sucker rod fishing tool |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080252088A1 (en) |
WO (1) | WO2008127258A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090008080A1 (en) * | 2007-07-03 | 2009-01-08 | Charles David Willis | Stress and torque reducing tool |
CN112145111A (en) * | 2020-11-06 | 2020-12-29 | 中国石油天然气集团有限公司 | Method for salvaging wear-resistant sleeve under pressure operation |
CN112922555A (en) * | 2019-12-05 | 2021-06-08 | 中国石油天然气股份有限公司 | Overshot and fishing tool |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN204419104U (en) * | 2014-12-19 | 2015-06-24 | 中煤科工集团重庆研究院有限公司 | Down-hole elongate rod fishing device |
Citations (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US562238A (en) * | 1896-06-16 | Sucker-rod socket | ||
US1365086A (en) * | 1920-03-09 | 1921-01-11 | Bullum Steve | Combination slip-socket |
US1573408A (en) * | 1925-05-13 | 1926-02-16 | Herman R Lloyd | Sucker-rod fishing tool |
US1620382A (en) * | 1925-11-13 | 1927-03-08 | Walter A O'bannon | Multiple sucker-rod socket |
US1620383A (en) * | 1925-12-04 | 1927-03-08 | Walter A O'bannon | Sucker-rod socket |
US1620486A (en) * | 1926-04-21 | 1927-03-08 | Walter A O'bannon | Multiple sucker-rod socket |
US1634935A (en) * | 1924-12-01 | 1927-07-05 | Walter W Donnelly | Lift for sucker rods, pipes, and the like |
US1720692A (en) * | 1927-03-21 | 1929-07-16 | Reynolds | Sucker-rod fishing tool |
US1745274A (en) * | 1928-02-01 | 1930-01-28 | John M Sauls | Fishing tool |
US1754696A (en) * | 1928-12-04 | 1930-04-15 | John M Sauls | Fishing tool |
US1780134A (en) * | 1928-07-30 | 1930-10-28 | Bus George F Le | Fishing socket |
US1785644A (en) * | 1929-03-06 | 1930-12-16 | Walter O Bannon Co | Slip socket |
US1787834A (en) * | 1928-03-06 | 1931-01-06 | Walter O Bannon Co | Sucker-rod socket |
US1797505A (en) * | 1929-01-23 | 1931-03-24 | Jones Fred | Releasing overshot |
US1828938A (en) * | 1928-03-06 | 1931-10-27 | Walter O Bannon Co | Combination sucker rod socket |
US1869861A (en) * | 1931-03-09 | 1932-08-02 | Walter A O'bannon | Sucker rod fishing tool |
US2067009A (en) * | 1933-05-29 | 1937-01-05 | Frank J Hinderliter | Tubing and sucker rod fishing socket |
US2114988A (en) * | 1935-04-26 | 1938-04-19 | Frank P Collins | Slip socket |
US2123036A (en) * | 1936-09-26 | 1938-07-05 | James L Johnston | Releasable fishing tool |
US2272529A (en) * | 1941-03-07 | 1942-02-10 | Albert D Larson | Fishing tool |
US2275911A (en) * | 1941-02-14 | 1942-03-10 | Bus Franklin L Le | Retriever tool |
US2567337A (en) * | 1948-05-24 | 1951-09-11 | Theodore M Hunt | Sucker rod fishing tool |
US2573444A (en) * | 1948-05-24 | 1951-10-30 | Theodore M Hunt | Sucker rod fishing tool |
US2665164A (en) * | 1949-01-27 | 1954-01-05 | Spang & Company | Well fishing socket or tool |
US2762438A (en) * | 1954-06-01 | 1956-09-11 | Cecil A Naylor | Wash-over spear apparatus |
US2814523A (en) * | 1954-10-01 | 1957-11-26 | Kendall R Stolm | Fishing tool for well drilling |
US3531836A (en) * | 1968-05-28 | 1970-10-06 | Charles D Crickmer | Conformable slip |
US3628822A (en) * | 1969-09-15 | 1971-12-21 | Otis Eng Co | Well tools |
US3737189A (en) * | 1971-12-23 | 1973-06-05 | Cities Service Oil Co | Reversible tie-back tool |
US4185865A (en) * | 1975-06-04 | 1980-01-29 | Taylor William T | Releasable wireline overshot |
US4548437A (en) * | 1983-04-15 | 1985-10-22 | Larson Supply Company | Downhole well fishing assembly |
US4801167A (en) * | 1987-08-25 | 1989-01-31 | Darrell Driskill | Downhole well fishing assembly |
US4838594A (en) * | 1986-10-06 | 1989-06-13 | Otis Engineering Corporation | Running and pulling tool |
US5054832A (en) * | 1990-07-10 | 1991-10-08 | Wada Ventures | Fishing tool for retrieving implements from a hole |
US5265927A (en) * | 1992-03-23 | 1993-11-30 | Davidson Jr David R | Downhole fishing tool |
US5361844A (en) * | 1993-06-15 | 1994-11-08 | Gotco International, Inc. | Well fishing grapple assembly and method abstract |
US6095583A (en) * | 1996-07-03 | 2000-08-01 | Weatherford/Lamb, Inc. | Wellbore fishing tools |
US6354372B1 (en) * | 2000-01-13 | 2002-03-12 | Carisella & Cook Ventures | Subterranean well tool and slip assembly |
US20020121379A1 (en) * | 2001-03-01 | 2002-09-05 | Doane James Christopher | Lock ring for pipe slip pick-up ring |
US20040149430A1 (en) * | 2002-11-21 | 2004-08-05 | Campbell John E. | Thru tubing tool and method |
US6926082B2 (en) * | 2003-01-21 | 2005-08-09 | Baker Hughes Incorporated | Wireline fishing safety sleeve |
US20060124307A1 (en) * | 2003-07-14 | 2006-06-15 | Weatherford/Lamb, Inc. | Retrievable bridge plug |
US7083209B2 (en) * | 2003-06-20 | 2006-08-01 | Weatherford/Lamb, Inc. | Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder |
-
2007
- 2007-04-12 US US11/786,699 patent/US20080252088A1/en not_active Abandoned
- 2007-06-06 WO PCT/US2007/013324 patent/WO2008127258A1/en active Application Filing
Patent Citations (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US562238A (en) * | 1896-06-16 | Sucker-rod socket | ||
US1365086A (en) * | 1920-03-09 | 1921-01-11 | Bullum Steve | Combination slip-socket |
US1634935A (en) * | 1924-12-01 | 1927-07-05 | Walter W Donnelly | Lift for sucker rods, pipes, and the like |
US1573408A (en) * | 1925-05-13 | 1926-02-16 | Herman R Lloyd | Sucker-rod fishing tool |
US1620382A (en) * | 1925-11-13 | 1927-03-08 | Walter A O'bannon | Multiple sucker-rod socket |
US1620383A (en) * | 1925-12-04 | 1927-03-08 | Walter A O'bannon | Sucker-rod socket |
US1620486A (en) * | 1926-04-21 | 1927-03-08 | Walter A O'bannon | Multiple sucker-rod socket |
US1720692A (en) * | 1927-03-21 | 1929-07-16 | Reynolds | Sucker-rod fishing tool |
US1745274A (en) * | 1928-02-01 | 1930-01-28 | John M Sauls | Fishing tool |
US1787834A (en) * | 1928-03-06 | 1931-01-06 | Walter O Bannon Co | Sucker-rod socket |
US1828938A (en) * | 1928-03-06 | 1931-10-27 | Walter O Bannon Co | Combination sucker rod socket |
US1780134A (en) * | 1928-07-30 | 1930-10-28 | Bus George F Le | Fishing socket |
US1754696A (en) * | 1928-12-04 | 1930-04-15 | John M Sauls | Fishing tool |
US1797505A (en) * | 1929-01-23 | 1931-03-24 | Jones Fred | Releasing overshot |
US1785644A (en) * | 1929-03-06 | 1930-12-16 | Walter O Bannon Co | Slip socket |
US1869861A (en) * | 1931-03-09 | 1932-08-02 | Walter A O'bannon | Sucker rod fishing tool |
US2067009A (en) * | 1933-05-29 | 1937-01-05 | Frank J Hinderliter | Tubing and sucker rod fishing socket |
US2114988A (en) * | 1935-04-26 | 1938-04-19 | Frank P Collins | Slip socket |
US2123036A (en) * | 1936-09-26 | 1938-07-05 | James L Johnston | Releasable fishing tool |
US2275911A (en) * | 1941-02-14 | 1942-03-10 | Bus Franklin L Le | Retriever tool |
US2272529A (en) * | 1941-03-07 | 1942-02-10 | Albert D Larson | Fishing tool |
US2567337A (en) * | 1948-05-24 | 1951-09-11 | Theodore M Hunt | Sucker rod fishing tool |
US2573444A (en) * | 1948-05-24 | 1951-10-30 | Theodore M Hunt | Sucker rod fishing tool |
US2665164A (en) * | 1949-01-27 | 1954-01-05 | Spang & Company | Well fishing socket or tool |
US2762438A (en) * | 1954-06-01 | 1956-09-11 | Cecil A Naylor | Wash-over spear apparatus |
US2814523A (en) * | 1954-10-01 | 1957-11-26 | Kendall R Stolm | Fishing tool for well drilling |
US3531836A (en) * | 1968-05-28 | 1970-10-06 | Charles D Crickmer | Conformable slip |
US3628822A (en) * | 1969-09-15 | 1971-12-21 | Otis Eng Co | Well tools |
US3737189A (en) * | 1971-12-23 | 1973-06-05 | Cities Service Oil Co | Reversible tie-back tool |
US4185865A (en) * | 1975-06-04 | 1980-01-29 | Taylor William T | Releasable wireline overshot |
US4548437A (en) * | 1983-04-15 | 1985-10-22 | Larson Supply Company | Downhole well fishing assembly |
US4838594A (en) * | 1986-10-06 | 1989-06-13 | Otis Engineering Corporation | Running and pulling tool |
US4801167A (en) * | 1987-08-25 | 1989-01-31 | Darrell Driskill | Downhole well fishing assembly |
US5054832A (en) * | 1990-07-10 | 1991-10-08 | Wada Ventures | Fishing tool for retrieving implements from a hole |
US5265927A (en) * | 1992-03-23 | 1993-11-30 | Davidson Jr David R | Downhole fishing tool |
US5361844A (en) * | 1993-06-15 | 1994-11-08 | Gotco International, Inc. | Well fishing grapple assembly and method abstract |
US6095583A (en) * | 1996-07-03 | 2000-08-01 | Weatherford/Lamb, Inc. | Wellbore fishing tools |
US6354372B1 (en) * | 2000-01-13 | 2002-03-12 | Carisella & Cook Ventures | Subterranean well tool and slip assembly |
US20020121379A1 (en) * | 2001-03-01 | 2002-09-05 | Doane James Christopher | Lock ring for pipe slip pick-up ring |
US20040149430A1 (en) * | 2002-11-21 | 2004-08-05 | Campbell John E. | Thru tubing tool and method |
US6926082B2 (en) * | 2003-01-21 | 2005-08-09 | Baker Hughes Incorporated | Wireline fishing safety sleeve |
US7083209B2 (en) * | 2003-06-20 | 2006-08-01 | Weatherford/Lamb, Inc. | Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder |
US20060124307A1 (en) * | 2003-07-14 | 2006-06-15 | Weatherford/Lamb, Inc. | Retrievable bridge plug |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090008080A1 (en) * | 2007-07-03 | 2009-01-08 | Charles David Willis | Stress and torque reducing tool |
US7950449B2 (en) * | 2007-07-03 | 2011-05-31 | Harbison-Fisher, Inc. | Stress and torque reducing tool |
US8215383B2 (en) | 2007-07-03 | 2012-07-10 | Harbison-Fischer, Inc. | Stress and torque reducing tool |
CN112922555A (en) * | 2019-12-05 | 2021-06-08 | 中国石油天然气股份有限公司 | Overshot and fishing tool |
CN112145111A (en) * | 2020-11-06 | 2020-12-29 | 中国石油天然气集团有限公司 | Method for salvaging wear-resistant sleeve under pressure operation |
Also Published As
Publication number | Publication date |
---|---|
WO2008127258A1 (en) | 2008-10-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20090146442A1 (en) | Sucker rod fishing tool | |
US6626238B2 (en) | Remote sensor for determining proper placement of elevator slips | |
US6564885B2 (en) | Up-hole overshot and safety drilling apparatus | |
US8464613B2 (en) | Sucker rod coupling extractor | |
US7427091B2 (en) | Spear head overshot for use in a cable guided fishing assembly | |
US20080252088A1 (en) | Sucker rod fishing tool | |
US7083209B2 (en) | Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder | |
AU2010284342B2 (en) | Spoolable coiled tubing spear for use in wellbores | |
CN213330991U (en) | Cable fishing tool for fishing well-falling instrument | |
US7578348B2 (en) | Overshot tool for retrieving an object in a well and methods of use therefor | |
US2915289A (en) | Combined jar and safety joint | |
CN210858632U (en) | Fishing tool for underground fish | |
CN212428682U (en) | Fishing tool | |
US5149163A (en) | On and off fishing tool | |
US2670927A (en) | Pipe releasing method | |
CN202125270U (en) | Safe spear blanking plug | |
RU115817U1 (en) | CATCH BAR | |
US1081427A (en) | Combination slip-socket. | |
US1776024A (en) | Pipe-unscrewing socket | |
RU2282016C2 (en) | External releasing overshot | |
US577812A (en) | George p | |
RU158596U1 (en) | FLEXIBLE PIPPER | |
CN114458207B (en) | Bottom plug capable of fishing expansion pipe and matched recovery tool thereof | |
RU2267598C2 (en) | Composite sucker rod socket | |
CN216811597U (en) | Anti-collision easy-to-salvage safety joint |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KELSO WELL SERVICING TOOLS INC., KANSAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KELSO, BRUCE D.;REEL/FRAME:019243/0839 Effective date: 20070412 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |