series 150 overshot in stock

General Description ................................................ 3Use .......................................................................... 4Construction ............................................................ 4Gripping and Releasing Mechanism ................... 4Pack-off Mechanism ............................................. 5Operation ................................................................ 6Precautions ............................................................. 6Undersize Parts ....................................................... 7Spiral Parts .............................................................. 7Basket Parts ............................................................ 7Overshot Accessories ............................................. 7Subsea Sheared Pipe Retrieval Method ................. 9Specifications and Replacement Parts ......... 12 19Overshot Accessories Tables ........................ 20 22Calculated Strength Tables ........................... 23 24Illustrations .............. 3, 5, 7, 8, 9, 10, 17, 19, 20 22

The Bowen Series 150 Releasingand Circulating Overshot provides thestrongest tool available to externallyengage, pack-off, and pull a fish. Thebasic simplicity and rugged constructionwith which it is designed have madeit the standard of all external catchfishing tools.

The Bowen Series 150 Releasing andCirculating Overshot has gained worldwide acceptance for fishing by meansof external engagement of a fish. EachOvershot is a carefully engineered unit.In service, it takes a positive grip over alarge area of fish and is therefore capable of withstanding extremely heavy pulling, torsional and jarring strains withoutdamage or distortion to either the toolor the fish.

Bowen Overshots are continually developed to new standards of strength andefficiency and are expertly constructedof the highest quality material.Each Bowen Series 150 Releasing andCirculating Overshot is a compact unitdesigned to engage, pack off and pull aspecific size of tubing, pipe, coupling,tool joint, drill collar or smooth O.D. tool.Through the installation of proper undersize parts, they may be adapted toengage and pack off any smaller size.

Bowen course thread Overshots aredesigned for easier assembly andmaintenance. The Bowen CT Overshothas a course ACME thread on the upperend of the Bowl where the Top Sub isattached and at lower end where theGuide is attached. See SupplementalInstruction Manual 1150A for list.The course thread allows much easierfield assembly and will stand moreabuse than the fine series currentlyoffered. The internal parts are completelyinterchangeable with existing BowenOvershots.Cross over bushings can be providedfrom fine thread series to course threadseries, allowing full use of Bowls, TopSubs, and Guides currently in stock.All sizes of Bowen Series 150 Releasingand Circulating Overshot are available inFull Strength or Slim Hole Types. Despitethe extremely small outside diametersof Full Strength Type Overshots, theyare engineered to withstand the pulling,torsional and jarring strains, which mustbe exerted by modern machinery, torelease and retrieve a lost fish.The Slim Hole Type Overshots havereduced outside diameters, as compared to the Full Strength. They are usedto perform pulling jobs in tight holeswhere no other outside catch, releasingfishing tool can be run.Use

A Bowen Series 150 Releasing andCirculating Overshot is used to engage,pack off and retrieve twisted-off or losttubing, drill pipe, coupling, tool joint,casing or other similar fish.

The Bowen Series 150 Releasing andCirculating Overshot is composed ofthree outside parts: the Top Sub, Bowl,and Guide. The Basic Overshot may bedressed with either of two sets of internalparts, depending on whether the fish tobe caught is near maximum catch sizefor the particular overshot.If the fish diameter is near the maximumcatch of the Overshot, a Spiral Grapple,Spiral Grapple Control and Type APacker are used. If the fish is a tubingcollar, a Type D Collar Packoff Assembly will replace the Type A Packer.If the fish diameter is considerably belowmaximum catch size (usually 12"), aBasket Grapple and a Mill Control Packeris used.Gripping andReleasing Mechanism

The Bowl of the Overshot is designedwith helically tapered spiral section in itsinside diameter. The gripping member(Spiral Grapple or Basket Grapple), isfitted into this section. When an upwardpull is exerted against a fish, an expansion strain is spread evenly over a longsection of the fish. No damage or distortion results to either the fish or the Overshot. This design permits a far strongertool with a smaller outside diameter thanis possible with an overshot that employsa single tapered section which supportsslips.A Spiral Grapple is formed as a left-handhelix with a tapered exterior to conformwith the helically tapered section in theBowl. Its interior is wickered for engagement with the fish.A Basket Grapple is an expansible cylinder with a tapered exterior to conform tothe helically tapered section in the Bowl.Its interior is wickered for engagementwith the fish.

Three types of Basket Grapples areavailable to meet the need for catchingvarious types of fish:The Plain Basket Grapple is standard,and will always be furnished unlessanother type is specified. It is wickeredfor its entire interior length. It is used tocatch any plain single diameter fish.The Basket Grapple with Long CatchStop has an internal shoulder located atthe upper end, to stop the fish in bestcatch position. It is designed to stop andcatch an upset, or box section of a tooljoint, with sufficient length left below theGrapple to allow the joint or upset to bepacked off with a Basket Mill ControlPacker.The Basket Grapple with Short CatchStop has a double set of wickers, of twodifferent internal diameters. It is used tostop and catch a coupling with aruptured piece of pipe engaged in itsupper end. The upper set of wickers willcatch the ruptured pipe, and act as astop against the coupling, while thelower set of wickers will catch the coupling. The coupling will be stopped in bestposition to be packed off by the MillControl Packer.Grapple Controls are of two types: SpiralGrapple Controls are used with SpiralGrapples; Mill Control Packers are usedwith Basket Grapples.Grapple Controls are used as a specialkey, to allow the Grapple to move up anddown during operation while simultaneously transmitting full torque from theGrapple to the Bowl.Spiral Grapple Controls and BasketGrapple Controls are plain. Mill ControlPackers include a packoff. See Pack-offMechanism for a complete explanation.In operation, the Overshot functions inthe same manner, whether dressed withSpiral Grapple parts or Basket Grappleparts

During the engaging operation, as theOvershot is rotated to the right andlowered, the Grapple will expand whenthe fish is engaged, allowing the fish toenter the Grapple. Thereafter with rotation ceased and upward pull exerted,the Grapple is contracted by the tapersin the Bowl and its deep wickers grip thefish firmly.

During the releasing operation, a sharpdownward bump places the larger portion of the Bowl tapers opposite theGrapple smaller tapered portion, breaking the hold. Thereafter, when the Overshot is rotated to the right, and slowlyelevated, the wickers will screw theGrapple off the fish, effecting release.The fact that Bowen Releasing and Circulating Overshots require right handrotation only, both during engaging andreleasing operation, is extremely important. This feature eliminates the dangersthat are present when it is necessary torotate the string to the left.

The type of Pack-off used depends onhow the Overshot is dressed, and theoperators choice.When the Overshot is dressed with aSpiral Grapple, a Type A Packer is used.The Type A Packer is a sleeve type. Itseats at its O.D. against the inside of theBowl. It has an internal lip which sealsaround the fish. Each type A Packer isdesigned to pack off a specific size. A

Type A Packer should be ordered foreach catch size Spiral Grapple.A Mill Control Packer is used when theOvershot is dressed with a Basket Grapple. The Type R Mill Control Packer isused when a packoff is required. Theunique double lip seal of the Mill ControlPacker provides a positive seal of thefish. The Packer is self energized and isretained within the Mill Control by a lowersecond sealing lip and requires no adhesive for retaining the Packer. The TypeR is most commonly used. It has areplaceable inner seal and a replaceableouter seal. The inner seal and the outerseal may both be replaced in the fieldwhen required. The Type R Mill Control(with mill teeth) is available. Mill ControlPackers are designed to remove smallburrs and rough breaks only. Replacement inner and outer seals are listedon page 20. Also see the special HighPressure Pack-off accessories on page19.All Mill Control Packers are manufacturedto pack off a specific size. One should

Type D Packer assemblies are available to pack off tubing collars in tubingsize Series 150 Overshots. The Type DPacker assembly consists of a Packer,a Spring and an O-Ring. It is assembledin the Bowl above the Grapple. Its upperend is sealed in a counter-bore in theTop Sub, by the O-Ring. In operation,its lower end stops the collar in propercatch position, while the integral moldedseal enters and packs off the collarthreads at the top of the collar. ThesePackers are listed on page 16.The Type D Collar Packer is designedto be used with a Spiral Grapple, in placeof a Type A Packer, where the collarbeing fished is too short to allow effectivecatch and pack off length.

First determine that the Overshot isproperly assembled, is dressed with theproper size Grapple and that all its partsare in good working condition. Refer toSpecifications beginning on page 11.

Bump down; then simultaneously rotateto the right and slowly elevate the fishingstring until the Overshot is clear of thefish; combined rotating and elevating isimportant.

If the hole size is so much greater thanthe fish size that it is possible for theOvershot to pass alongside the fish,install either a Wallhook Guide or anOversize Guide in place of the StandardGuide. (see page 18)If the top of the fish is a heavily burredtool joint, replace the Standard Guidewith the proper Milling Guide, Type A orC. (see page 19)If the fish has an unengageable upperend, install an Extension between theTop Sub and the Bowl (see illustration onpage 7).Using the Top Sub, connect the Overshotto the fishing string and run it in the hole.To Engage and Pull the Fish

As the top of the fish is reached, slowlyrotate the fishing string to the right andgradually lower the Overshot over thefish; combined rotating and lowering isimportant.Allow the right-hand twist to slack out ofthe fishing string and then pull on the fishby elevating the fishing string.If the fish does not come, turn on thecirculating pumps and maintain anupward strain while circulation is forcedthrough the fish.

Unless an upward strain is maintained,never rotate the fishing string to the leftwhile the Overshot is engaged with thefish.Always bump the full weight of the fishingstring before starting releasing operations.Always shut off the circulating pumpsbefore lowering the Overshot over thefish.Function of the Overshotin Engaging the Fish

After the Overshot has reached the topof the fish, combined rotation andlowering results in the following:1. The guide will direct the fish into theOvershot.2. The Grapple will expand and the fishwill pass through it.3. The fish will pass through the Packoff Rubber and will be halted when itcontacts the pin end of the Top Sub.In the case where an external upsetsection is being engaged by a Basket Grapple, the fish will be haltedby the solid steel stop in the upperend of the Basket Grapple.

5. Likewise, once the fish is in thisposition, the circulation will sealthe Packoff Rubber around the fishand prevent fluid passage downthe outside. Thus, by building uppressure with the pumps, the fluidcan be forced down through the fish.Function of the Overshotwhen Releasing

The sharp downward bump places thelargest portion of the Bowl tapers opposite the Grapple and breaks the hold.Right-hand rotation expands the Grappleand by maintaining right-hand rotation,the Overshot may be withdrawn from thefish.Function of the Grapple

The mechanical conditions which causedthe Grapple to expand and contract are:1. The Grapple is a left-hand helix.2. The lower end of the Grapple isanchored in the Overshot Bowl.3. The inside diameter of the Grappleis smaller than the outside diameterof the fish.As the Overshot is rotated to the rightand lowered over the fish, the drag ofthe fish against the grapple causes theGrapple to unwind and expand sufficiently to allow the fish to enter.As the Overshot is rotated to the rightand withdrawn from the fish, the dragof the fish against the Grapple causesthe Grapple to unwind and expandsufficiently to allow the Overshot to bewithdrawn.

4. The fish is now properly located inthe Overshot and thereafter whenupward pull is exerted, the Grappleis contracted by the tapers in theBowl and the hold will be secure.

Undersize Spiral parts: Spiral Grappleand Type A Packer are used to catchsizes from Maximum Catch SpiralGrapple, down to Maximum CatchBasket Grapple, as specified in thespecifications tables on pages 11 thru15 inclusive.These Spiral Grapples and Type APacker should be changed for eachdifferent size fish. They will effectivelycatch and pack off worn fish as much as332" maximum undersize. The over-rangeof each grapple is approximately 132".There are exceptions, particularly in theSlim Hole type Overshots. Some of thesewill effectively catch undersize oroversize fish by no more than 116"maximum.Basket Parts

Top Subs are available for BowenOvershots in two types: SS, Short Subwith shoulder; and LS, Elevator Sub withshoulder. Type SS Top Subs are furnished as part of the assembly, unlessotherwise specified.Lock Rings

Bowen Lock Rings are available asoptional equipment to prevent the TopSub and Bowl of Bowen Series 150Releasing and Circulating Overshotsfrom unthreading during backing-offoperations. Use of Bowen Lock Ringseliminates the weakening practice ofdrilling and tapping the Bowl to installa set screw for securing the Bowl to the

If a twist-off has left a fishwhose upper end is unengageable, an ExtensionSub should be installedbetween the Top Sub andthe Bowl of the Overshot.This will permit lowering ofthe Overshot over the fishfar enough to insure engagement and a perfectpack off in the fishingoperation. Extension Subsare listed on page 21.Extension Sub

Basket Grapples will effectively catch fishworn as much as 332" maximum undersize. The over range of each grapple isapproximately 132".There are exceptions, particularly in theSlim Hole type Overshots. Some of thesewill effectively catch undersize fish bymore than 132" maximum.

When the Overshot is dressed with aspiral grapple and type A Packer, aSpacer is required between the Packerand Top Sub. Please refer to Lock RingTable on page 21. The purpose of theSpacer is to fill the space produced bythe extra standoff of the Top Sub whenused with the Lock Rings. No Spacer isrequired when A Packer is not used.

Itcoloy Mill Extensions are used to millaway flared or jagged metal from the topof the fish so that the fish will pass easilyinto the Overshot Bowl. For ordinarywork, they are installed between the Bowland the standard, oversize or wall hookguides.The Itcoloy Mill Extension is also usedin the Bowen Subsea Sheared PipeRetrieval Method (see page 9). In thiscase it is installed between the OvershotBowl and the special guides. They maybe ordered by giving the Overshotnumber and specifying Itcoloy MillExtension Type and fish size. Pricesavailable on request.

Itcoloy Mill Guides are used to millaway jagged metal form the top of thefish so that the fish will pass easily intothe Overshot Bowl.They may be ordered, using the standard Guide number, and specifying,Itcoloy Mill Guide Type C and fish size.Subsea ShearedPipe Retrieval

The BOP being used must have at leasttwo sets of rams: lower pipe rams andshear rams above them. Before shearing, it is necessary to land the nearesttool joint on the pipe rams and closethem to suspend and pack off the string.The shearing then produces flattenedflare-ends with protruding ears.When the rig returns, the string must beretrieved, the end brought to the surfaceand the sheared piece removed. In thepast, sheared pipe retrieval has been difficult, costly and time-consuming. Oftenlarge parts of the BOP stack must bebrought to the surface to effect retrieval.The Bowen method of sheared piperetrieval can be achieved in a simple,time-saving and economical manner.It requires only two easy steps usingthe Series 150 Circulating and ReleasingOvershot equipped with a few specialaccessories

If the hole size is so much greater thanthe fish size that it is possible for theOvershot to pass alongside the fish, anOversize Guide or a Wallhook Guidemust be installed in place of the Standard Guide to insure alignment of thefish with the Overshot. These are listedon page 18.

Twist-offs in tool joints are not alwaysimmediately revealed at the surface andas a result drilling is not halted at once.In such cases the top of the fish is usually a badly burred tool joint, or drill pipe,and a Type A Mill Guide must be installedon the Overshot to trim the burr off thefish so that it can enter the Overshot.Itcoloy Mill Guides perform the sameservice on undersize tool joints and arealso used when the top of the fish is anunusually jagged section of pipe. Moreinformation on these is shown on page19.

The standard guide, grapple and packerhave been removed from a BowenOvershot and it is then dressed with aMill Extension and special flat-bottomLong Guide, and installed on the drillstring. The Mill Extension has taperedmilling ribs of Bowen Itcoloy (sinteredtungsten carbide) facing on its I.D. TheOvershot is lowered into the BOP andover the end of the drill pipe, and thenrotation takes place to mill down theflared ears of the sheared pipe. The endof the Long Guide is faced with softmetal so that if inadvertently it contactsthe BOP pipe rams, it does not damagethem. The Guide is also of a lengthwhich prevents the Mill Extension fromcontacting and damaging the tool joint inthe BOP. This is important because thisjoint O.D. is where engagement of thestring will take place.

After the milling step is completed, theBowen Overshot is brought back to thesurface, dressed with a special flatbottom Short Guide, Extension Sub anda Basket Grapple and Mill Control Packersized to engage the joint. (The ShortGuide also has a soft metal end toprevent ram damage.) The Overshot islowered again and as it enters the BOP,the milled-down flare-end passesthrough the Grapple and Mill ControlPacker, and is housed in the ExtensionSub while the Grapple engages andpacks off the tool joint. A pull is exertedon the Overshot to make certain ofengagement and then the BOP piperams are retracted, and the string israised to the rig floor where the severedjoint is removed and replaced, allowingnormal operations to resume.

The lists of assemblies and accessoriesin this Instruction manual have beenreduced to the most popular Overshotsand parts worldwide. This has been doneto make it easier for the customer toquickly find the information they requireand also for the ease of transmitting theelectronic version of the file.The Bowen Series 150 Overshot productline consists of many different sizes andtypes of assemblies and items. A listof over 225 of these is in SupplementalInstruction Manual 1150A. If a locallypopular assembly is not listed in Manual1150 it will most probably be listed inManual 1150A. However, this is still nota complete list. There are additionalassemblies not listed.The standard Series 150 Overshot is aright-hand operation tool with right-handthreads. But there are many specialsoffered. Some of the other tools madeare right-hand tools with left-handthreads, left-hand tools with left-handthreads, left-hand tools with right-handthreads, tools for H2S service, toolsfor CO2 service, tools for H2S and CO2service, very high strength tools, verythin wall tools, and with sizes rangingfrom 25/16" OD to above 32" OD.Even with all the possible combinations,National Oilwell continues to design newassemblies to add to aproduct line thatwas started almost 60 years ago!

If the hole size is so much greater than the fish size that it is possible for the Overshot to pass alongside the fish,an Oversize Guide or a Wallhook Guide must be installed to insure alignment of the fish with the Overshot.

In cases where the top of the fish is a badly burred tool joint or drill pipe, a Type A MillingGuide should be installedon the Overshot to trim the burr of the fish so that it can enter theOvershot. Type C Milling Guides perform the same service on undersize tool joints; theyare also used when the top of the fish is an unusually jagged section of pipe. Type C Guidesare available as carbonized, fluted guides or Itcoloy Guides.

The High Pressure Pack-off Assembly is a special assembly for use in areas of extreme pressure. It consistsof a Bushing and four packing elements. It is normally installed between the Bowl and the Guide of the Overshot.

If a twist-off has left a fish whose upper end is unengageable, an Extension Sub is installedbetween Top Sub and the Bowl of the Overshot. This will permit lowering of the Overshot overthe fish far enough to insure a secure engagement and a perfect packoff.Extension Sub SpecificationsSizes

Lock Rings prevent the Top Sub and Bowl of a Bowen Overshot from unthreading when reverserotation, such as backing-off, occurs. They provide a positive means of locking straight-threaded,shouldered joints without excessive torque or pins. Knurled surfaces on the rings dig into theshoulder when the joint is made-up. Cam teeth between the rings have pitches greater than thethread pitch and these cams produce the locking action.Lock Ring SpecificationsBowl No.

B-5138B-5141B-5144B-5150B-51535156B-5156B-5164B-5167B-5170B-5173B-5179B-5187B-5195B-5198B-5208B-5216B-5224B-5232B-5235B-5243B-52515259B-5259B-5267B-5283B-5286B-5294B-5299B-5307B-53155323B-53235331B-5331B-5346B-5356B-5427B-54305700M-57005735

series 150 overshot in stock

I debated on where to go next, but at the end of the day the most widely used fishing tool has to be an overshot. Some will say why not a spear? Well if you must ask, always go with the strongest fishing tool you can run to catch the fish. And if you run a spear, never plug the I.D. of your fish by breaking it off. Done with that!

The info that follows has been taken from the manuals published on overshots. I realize that paper manuals are a thing of the past, yes, yes at one time fishing tool hands carried massive catalog brief cases full of reference material. Now you have the luxury of your laptop loaded with information. If you have never sat down and read an overshot manual, now might be a good time.

The overshot is highly versatile and efficient tool. There are several different types of overshots, however each overshot is designed to engage a specific size of tubing, pipe, coupling, tool joint, drill collar or smooth OD tool.

The original overshot was developed by Bowen Oil Tools, which is now part of NOV. One thing I will point out is that in the catalogs you will see more than one assembly number for a given OD of Overshot, this came about due to the two locations developing their own variations. I found this information on NOV’s website and thought it was interesting to share.

Bowen™ became a leader in innovation with the creation of the first overshot, the Series 150, in 1935. This tool set the standard for fishing equipment, and the quick acceptance of the tool assured the company partners that their business would be successful. The company continued to create new products, building a reputation for their well tool design and construction.

Currently there are several manufacturers of overshots, NOV (Bowen), Rubicon (Logan) and Applied Oil Tools (Gotco). These overshots are designated by a series number as follows:Series 10 - Sucker Rod Overshot

Overshots may be identified by one of the following, known as “type”:Full Strength (FS) - engineered to withstand all pulling, jarring and torsional strain

The basic overshot (from top down) consists of a top sub, a bowl, grapple, control, and a guide. In addition to the basic components, some overshots (Series 10 and 150) can be dressed with either a:Spiral grapple used if the fish diameter is near the maximum catch of the overshot, or a

The Series 150 Overshot features the ability to packoff on the fish. When the circulating packoff is not used, the fluid circulates down the drillpipe, aroundthe top outside of the fish, through the slip or grapple assembly, around the guide shoe and up the annulus.

When the circulating packoff is used, the annular space between the top outside of the fish and the inside of the lower part of the overshot is packed off, diverting the fluid flow down into the fish, making it easier to release and recover the fish. Packoffs usually are not high pressure devices but will often withstand sufficient pressure to establish circulation through the fish. Third party high pressure packoffs are available from various sources.

The extension can be installed between the top sub and the bowl of the Series 10, 70, and 150 overshots. It is used to extend the overshot bowl to:Allow the grapple to catch farther down on a fish that may be necked down at the top by having been pulled in two, or latched by an overshot and released several times, or to

A stop ring must be used where a fish OD reduces immediately below the catch area to allow the grapple to bite on full-size pipe.Example - catching a Hydril upset or EUE collar. If the upset of collar should pass completely through the grapple, the overshot may not be releasable.

The Series 10 Sucker Rod Overshot is designed to engage and recover sucker rods, couplings, and similar items from inside tubing strings.Basket grapples are recommended for fishing for hardened and ground boxes (Sucker Rod Box).

The Series 20 Sucker Rod Overshot is a short catch tool which provides a means for engaging the exposed portion of a fish too short to be engaged with a Series 10 overshot.Uses basket grapples only

Is different from Series 10 in that the grapple control is at the top of the bowl above the basket grapple placing the basket grapple at lowest position in the bowl.

The Series 70 Short Catch Overshot is designed to engage the exposed portion of a fish too short to engage with Series 150 overshots.Uses basket grapple only

The Series 150 Releasing and Circulating Overshot is used to engage, packoff, and retrieve twisted-off lost tubing, drillpipecoupling, tool joint, casing or other similar fish.

A right hand wicker grapple converts a normal right release overshot to left hand release. This grapple is used where you expect to apply excessive right hand torque to release a packer, safety joint, etc. Note: Overshot will have to be released by left hand rotation.

High Pressure Packoff Assemblies:The High Pressure Packoff Assembly is an accessory to the Series 150 Overshots. It is used when high pressure circulation to the fish is required. It consists of a packoff sub with packing and packing rings and is installed between the top sub and bowl of the overshot. By running the packoff sub above the bowl, this design prevents the application of high internal pressures to the overshot bowl. The design of the High Pressure Packoff Assembly allows pressures two to three times the standard overshot packoff to be applied to the fish.

This information comes directly from the NOV manual for the Wide Catch Overshot. This is probably the first and only change to this common tool I know of in my career.

The Wide Catch Overshot provides the strongest tool available to externally engage, pack-off, and pull a fish that has been significantly worn. This tool has similar rugged design features and construction as the industry standard, Bowen Series 150 overshot, with the ability to interchange the Bottom Guide with the full range of existing components used with the standard Bowen Series 150 overshot.

In service, the Wide Catch Overshot (WCOS) takes a positive grip over a large area of fish and is capable of withstanding heavy pulling, torsion, and jarring strains without damage to the tools or the fish.

The WCOS has been designed to significantly increase the catch range of the OD of the fish to be caught, compared to the standard overshot. This enables a greater opportunity for a successful fishing operation in a reduced number of trips, thus reducing overall intervention costs for the operator. In addition to the large catch range, the WCOS has the ability to seal across very large extrusion gaps at both standard and high pressure and provide full circulation through the fish, should it be required.

Connections between the Top Sub/Bowl and Extension Sub have been designed to create a seal. This will prevent the connection from washing out should the overshot be required to be flowed through for a long period of time. In order to lock the Top Sub/Extension Sub to the Bowl from backing off during operation, set screws have become standard and will gall the threads should the connection break free.

The operation of all overshots is identical. The exception being that the Series 150 carries a packoff which provides circulation through the fish. First, determine that the overshot is properly assembled and dressed with the proper size grapple. Make up the overshot on the fishing string (normally it is run connected to the bottom of the bumper sub) and run it into the well. As the top of the fish is reached make sure circulation has been established to clear overshot ID of any plugging. Lower the overshot onto the top of the fish with no rotation at first. A 5,000 pound set down weight will be sufficient to engage the grapple. While lowering the overshot over the top of the fish watch for pressure build up, shut off pumps if any pressure build up is noticed. Should any back pressure be noticed, release the back pressure to allow the grapple to engage the fish. By elevating the string it can be determined, if the grapple went over and engaged the fish. If unable to work overshot over top of fish without rotation, then slowly rotate the fishing string to the right and gradually lower the overshot over the fish. Combined rotation and lowering over top of the fish are important to keep the grapple in the release position. This provides the maximum clearance between the grapple and fish. While lowering the overshot over the top of the fish, watch for torque build up and an increase in pump pressure. A pump pressure build up indicates the overshot has gone over the top of the fish thereby reducing the flow area. Stop rotation (continued rotation could dull the wickers of the grapple) enabling the grapple to set. Allow the right hand torque to slack out of the string and then pull on the string by elevating the string to set the grapple.

To release from the fish, bump down, then simultaneously rotate to the right and slowly elevate the fishing string. It is best to have a clean fishing top before running the overshot.

series 150 overshot in stock

TheSeries 150 Overshot consists of three outsideparts: Top Sub, Bowl, and Standard Guide. The BasicOvershot may be dressed with either of two sets ofinternal parts, if the fish diameter is near the maximumcatch of the Overshot, a Spiral Grapple, Spiral GrappleControl, and Type "A Packer are used. If the fishdiameter is considerably below maximum catch size(or more)a Basket Grapple and a Mill Control Packer areused.

series 150 overshot in stock

External catch | Fishing  Tool Overshots | Overshots | Series 150 Overshots | Short Catch Overshots | Sucker Rod Overshots | Overshot Guides | Mill Guide | Hook wall guide | Overshot Extension | Grapple | Spiral Grapple | Basket Grapple | Box Tap | Die Collar Tap | Rotary Die Collar

series 150 overshot in stock

Bowen™ Series 150 Releasing and Ciculating Overshots are the industry standard for external catch fishing tools. With a proven track record and the highest quality construction and design, the Series 150 Overshot is the efficient and cost effective tool for fishing companies all over the world.

series 150 overshot in stock

Series 150 Overshots Bowen Series 150 Releasing and Circulating Overshots The NOV Downhole Bowen Series 150 Releasing and Circulating Overshot is the strongest tool available to externally engage, pack-off, and pull a fish. The basic simplicity and rugged construction with which it is designed have made it the standard of all external catch fishing tools. Construction The Bowen Series 150 Releasing and Circulating Overshot is composed of three outside parts: the Top Sub, Bowl, and Guide. The Basic Overshot may be dressed with either of two sets of internal parts, depending on whether the fish to be caught is near maximum size for the particular overshot. If the fish diameter is near the maximum catch of the Overshot, a Spiral Grapple, Spiral Grapple Control, and Type “A” Packer are used. If the fish diameter is considerably below maximum catch size (usually ½”) a Basket Grapple and a Mill Control Packer are used. Inner Seal Basket Grapple Mill Control Packer Outer Seal Basket Grapple Basket Grapple with Long Catch Stop FISHING TOOLS Gripping and Releasing Mechanism The Bowl of the Overshot is designed with helically tapered spiral section on its inside diameter. The gripping member (Spiral Grapple or Basket Grapple), is fitted into this section. When an upward pull is exerted against a fish, an expansion strain is spread evenly over a long section of the bowl and the compression strain is spread evenly over a long section of the fish. No damage or distortion occurs to either the fish or the Overshot. This design permits a far stronger tool with a smaller outside diameter than is possible with an overshot that employs a single tapered section which supports slips. A Spiral Grapple is formed as a left-hand helix with a tapered exterior to conform with the helically tapered section in the Bowl. Its interior is wickered for engagement with the fish. A Basket Grapple is an expandable cylinder with a tapered exterior to conform to the helically tapered section in the Bowl. Its interior is wickered for engagement with the fish. Two types of Basket Grapple are available to meet the need for catching various types of fish. The Basket Grapple with Long Catch Stop has an internal shoulder located at the upper end, to stop the fish in the best catch position. It is designed to stop and catch collars and tool joints, with sufficient length left below the Grapple to allow the joint to be packed-off with a Basket Control Packer. The Basket Grapple with Short Catch Stop (not shown) has a double set of wickers of two different internal diameters. It is used to stop and catch a coupling with a ruptured piece of pipe engaged in its upper end. The upper set of wickers will catch the ruptured pipe and act as a stop against the coupling, while the lower set of wickers will catch the coupling. Grapple Controls are of two types: Spiral Grapple Controls are used with Spiral Grapples; Basket Controls are used with Basket Grapples. Grapple Controls are used as a special key to allow the Grapple to move up and down during operation while simultaneously transmitting full torque from the Grapple to the Bowl. Spiral Grapple Controls are always plain; Basket Grapple Controls may be either plain or include a Packoff. In addition to the Packoff, mill teeth are included. See Packoff Mechanism in this catalog for a complete explanation. Bowl Bowl Basket Grapple Inner Seal Mill Control Packer Outer Seal Guide Bowen Series 150 Releasing and Circulating Overshot with Basket Grapple 5