wireline overshot tool quotation

Baoji Ruixin Energy Equipment Co., Ltd. was established in 2012. It is an IS0: 9001-2015 and API Q1 system certified technology research and development organization specializing in the design and manufacture of steel wire, cable and coiled tubing tools. With strong new product research and development capabilities, it has obtained 12 national utility model patent certificates and 1 invention patent certificate. Undertook two prefecture-level and provincial-level scientific research projects. Our products include wireline wireline wellhead blowout prevention equipment, wireline downhole tools and coiled tubing downhole tools. At present, we have provided professional equipment and technical support to more than 50 oilfield service companies in various regions at home and abroad.

Steel wire working tools are certified by API, and all manufacturing are strictly in accordance with API system, including quality control management, environmental management and occupational health and safety management. For each wire working tool and each part, we have achieved traceability from raw materials, production process to product shipment.

Overshots are a key component of wireline coring systems. To retrieve the core sample, the overshot is lowered into the hole on a wire cable until it comes in contact with the spearhead point on the head assembly. Positive latching lifting dogs securely attach, and the inner tube assembly is pulled from the hole to retrieve the core. V-lock Overshots Hole Products" V-lock overshots are safe, reliable, fast, and easy to use. The automatic safety feature is designed to reduce the chance of an accidental release. When the inner tube assembly is attached and lifted, the lifting dogs automatically retract into position. No extra manual steps are required to activate the safety feature, thus reducing the potential for human error. Standard Overshots Hole Products" standard overshots feature a manual safety lock pin. Once the core filled inner tube is hoisted above the top of the drill rods the safety lock pin can be inserted through the overshot head and under the spearhead point. This will allow the operator to hoist and remove the core sample from the inner tube.

The Wireline Releasable Overshot is a slip type overshot used to retrieve a fish lost in the well bore that does not have a conventional fishing neck.

Once latched onto a fish the overshot can be released by jarring downwards provided the overshot has a solid footing upon which the core can be driven against.

The Wireline Releasable Overshot is composed of the top sub, cylinder, nut, main spring, mandrel, auxiliary spring, adapter sleeve, slips etc., simple structure,easy to use.

The overshot is “planted” onto the fish to provide a new fish neck profile. This is then engaged with a standard releasable pulling tool or a Peak HD FRC pulling tool for heavy jarring applications.

David L. Farley ATTORNEY United Statesv Patent O RELEASING OVERSHOT David L. Farley, Duncan, Okla., assigner to Halliburton Company, a corporation of Delaware Filed Mar. 14, 1958, Ser. No. 721,500

1 Claim. (Cl. 294-4102) This invention relates to an oil well device and more particularly to what is known as an overshot for removing objects Ifrom oil wells in a fishing operation.

Overshots are well-known devices for retrieving objects from oil wells. Ordinarily, such overshots are lowered into an oil well on either a wire line or on tubing or drill pipe and surround and latch on to the object or fish to be removed, the grapple having spring fingers of some sort to assist in making the coupling.

The overshot `of the present invention has similar mechanisms, but it is especially designed to release from the fish when desired, as in the case where the fish is stuck and cannot be removed and it is necessary to remove the overshot fro-rn the well without pulling the fish.

The overshot of the present invention is composed basically of a locking spring and a releasing mechanism. The locking spring consists of a cylindrical part split into several sections which act as fingers. When the fingers are spread over the neck of the fish, the inner shoulders of the fingers normally hook below the top of the fishing neck so that when upward force is exerted on the overshot, this force is transferred to the fish. The overshot can be released by jarring downwardly upon the locking spring and the housing which contains it. Within the housing there is la releasing sleeve held in inactive position `during normal operation of the tool, and provided with a snap ring and two shear pins. Downward jarring shears these pinsso that the housing can then slide downwardly and cause the snap ring to secure the releasing sleeve in -a higher position in the housing. Then, when an upward yforce is exerted on the overshot, the releasing sleeve comes in contact with the lower end of the locking spring, thus, spreadingy the fingers and allo-wing the overshot to pull off from the fishing neck.

It will -thus be seen that an object of the invention is to provide a releasing overshot which can be lowered into a .well in such a condition that it will serve as a grapple and impart upward pull or upward jarring action upon a fish but which may be caused to releasefrom the fish upon downward jar being delivered to it.

Figure 2 is a view in vertical quarter cross section of the releasing overshot of Figure l, the view illustrating the position of the parts when the overshot is first brought into grapple posit-ion with a fish; v

Figure 4 is a view in vertical `cross section of the retrievable overshot similarto that of Figures 2 and 3 but illustrating the position of the parts after a downward ICC jarring blow has been delivered to shear the pins but before the fingers of the locking spring have been disengaged from the leek of the fish; and

Figure 5 is a view of the releasing overshot in vertical quarter cross section similar to Figures 2, 3, and 4 but illustrating the positionvof `the parts after the overshot is released from the neck of the fish.

Referring to the drawing in detail and first to the general assembly of Figure 1it will be seen that a cable 10 is there illustrated as supporting a conventional twoway jar 11 which is, in turn, connected to a releasing overshot 12 connected to a fishing neck L13 of a fish 14.

The novelty of the present invention resides in the general assembly illustrated and more particularly in the details of construction of the releasing overshot which is contained within the housing 12.

Figures 2, 3, 4, and 5 are all similar and illustrate the sequence of operation of the releasing overshot as well as the details of construction of the various parts.

There are two shear pins 19 employed in the overshot, these "being fitted into suitable sockets in the housing 12, as illustrated in Figures 2 and 3, and arranged 180 degrees apart. For purposes of assembly, the sockets for the pins 19 may be provided with externally removable caps, -but these have not been illustrated in the drawing for reasons of clarity.

There is also provided in the overshot assembly a split snap ring 20. This is mounted in a groove on the releasing sleeve 26 and serves to lock the sleeve in its upper position in the housing 12, as described hereinafter, once the pins 19 have sheared. As shown in Figures 2 and 3, this snap ring 20 is held compressed by the lower portion of the housing 12. When it is raised sufiiciently within the housing 12, it snaps outwardly into the groove 18, as illustrated in Figures 4 and 5.

For normal operation in making connection with the head 21, there is a locking spring consisting of a cylinder of spring steel having a ring portion 23 and depending fingers 24 terminating at the lower end in catches 25. Thus, when the overshot "is lowered into the well, the

The important -feature of the invention resides in the provision of mechanism for spreading the fingers 24 outwardly and holding them in an outwardly or expanded position should it be desired to release the overshot from the fish. To this end a releasing sleeve 26 is mounted in the lower portion of the housing 12 and held in place therein by the shear pins 19. So long as the pins 19 are not sheared, the releasing sleeve is held stationary with respect to the sleeve 12 and occupies the inactive posit-ionv shown in Figures 2 and3 with respect thereto. When the "pins 19 are sheared,.the sleeve 26 can then move upwardly with respect to the housing 12 and occupy thepositions of Figures 4 and 5, the split ring 2t) serving to limit the amount of travel of the sleeve 26 with respect to the housing 12 as the ring 20 enters the groove 1S.

With the above mechanism, it will be clear that the overshot mechanism, consisting of the housing 12 and the parts mounted in it, may be lowered into a well until the locking spring engages and grapples a suitable shing neck, such as illustrated in Figure 2. In normal operation an upward pull may then be taken on housing 12, and the upward pull may be transmitted by the land 15 to the locking ring and iish. Any number of upward jar blows can then be delivered by the jar 11 to the fish through the spring lingers 24 and catches 25.

Assume, however, that the fish cannot be moved or that for any other reason it is desired to release the overshot from the fish, the upward pull is discontinued and a downward jar blow is delivered b v the jar 11 to the housing 12. Such downward blow will cause the parts to take the position shown in Figure 4. 1n this position, the sleeve 26 is resting upon the sh and the downward stress of the jar blows has been taken by the jar pins 19 so that they have sheared. As soon as the pins 19 shear, there can be relative movement between the housing 12 and the sleeve 26 so that the ring 2G snaps into the groove 18 and holds the sleeve 26 in its upper position in the housing 12. After this has happened, upward pull upon the overshot will cause the cam surface 27 to engage the catches and spread the spring iingers 25a outwardly so that the catches 25 can be moved upwardly past the head 21 and the overshot removed from the ,well without engagement with the tish 13.

A releasing overshot for use in removing a fish from a well or the like, comprising a cylindrical housing, a locking spring within said housing and having a sh engaging catch depending therefrom, a releasing sleeve Within said housing beneath said catch, said catch and said releasing sleeve having opposed surfaces eifective to positively cam said catch to a fish releasing position upon movement of said releasing sleeve relatively toward said catch, releasable retaining means for holding said releasing sleeve in a lower inoperative position in said housing and out ot" engagement with said catch, said retaining means being releasable upon forcible downward movement of said housing relative to said releasing sleeve to position said releasing sleeve in an upper operative position in said housing, and a latch between said releasing sleeve and said housing for holding said releasing sleeve in said upper position in said housing after said forcible upward movement therein, said opposed surfaces engaging in said upper position of said releasing sleeve to positively cam said catch to a sh releasing position whereby the overshot maybe removed from the well without the tish.

A wide variety of overshot fishing tools options are available to you, such as swivel, fishing plier and spool.You can also choose from ocean boat fishing, lake and river overshot fishing tools,

The BT Casing Overshot Housing is designed to house a conventional pulling tool while giving the user the versatility of having a larger OD while trying to latch a small fishneck.

The BT Casing Overshot Housing is generally used when there is a need to latch a small fishneck in larger diameter pipe or tubing, by inserting a conventional pulling tool into the top sub, and installed the proper size bell on the overshot housing, the ability to latch a small fishneck in larger bores is possible with great ease.

The BT Casing Overshot Housing is also valuable during fishing operations, the bell on the bottom of the overshot eliminates the risk of travelling past the desired target during fishing operations, bells can be machined to specific sizes to accommodate job specifics.

Designed to complement the Sonic Dual Tube 4.5 in. (SDT45) system for sonic applications, the SDT45 Weighted Wireline (WWL) system from Geoprobe® adds yet another innovative tool to the Geoprobe® sonic tool box. While conventional wireline systems with various latching mechanisms have proven themselves in the coring world, their adaptation to sonic applications has not been without its challenges.

Jed Davis, lead engineer for the new system, said that conventional wireline systems utilize a mechanical latch to hold a core barrel in place inside of the core rod at the bottom of the tool string. “The tool string (core barrel and core rod) is advanced through the sampling interval,” Davis explained. “A release tool (overshot) is then lowered down to release the mechanical latch so the core barrel can be retracted.”

The ‘secret’ behind the SDT45 Weighted Wireline design is ... Mass. The core barrel uses a simple weight system to hold it in place at the bottom of the tool string rather than a mechanical latch. In other words, the latching mechanism is replaced by a weight system.

According to Davis, one critical design feature of this system is the adaptation of the modular weight system to the Geoprobe® rod handler. “Once the weight system is initially put into the tool string, it’s not handled by us again until after the last sample has been retrieved from the borehole,” he said. During every sample extraction at ground surface, the weight system is easily handled by the rod handler and never by the driller or driller’s helper. “Coming from someone who spends their days outside working with tools, that’s a great thing!” Davis added.

The SDT45 Weighted Wireline system is designed to complement the standard SDT45 tooling. Davis recommends using standard SDT45 tooling with 2.25-inch center rods in softer, shallower formations. When deeper intervals (50 feet plus) or consolidated formations are encountered, “the weighted wireline system can easily be implemented without pulling the casing,” Davis added.

The SDT45 and SDT60 (Sonic Dual Tube 6.0 in.) and the new SDT45 Weighted Wireline system are designed by and available exclusively through Geoprobe Systems®, and can be used under most sonic rigs.

Designed to complement the Sonic Dual Tube 6 in. (SDT60) system for sonic applications, the SDT60 Weighted Wireline (WWL) core drilling system from Geoprobe® adds yet another innovative tool to the Geoprobe® sonic tool box. While conventional wireline core drilling systems with various latching mechanisms have proven themselves in the coring world, their adaptation to sonic applications has not been without its challenges.

Jed Davis, lead engineer for the new system, said that conventional wireline core drilling systems utilize a mechanical latch to hold a core barrel in place inside of the core rod at the bottom of the tool string. “The tool string (core barrel and core rod) is advanced through the sampling interval,” Davis explained. “A release tool (overshot) is then lowered down to release the mechanical latch so the core barrel can be retracted.”

The ‘secret’ behind the SDT60 Weighted Wireline design is ... Mass. The core barrel uses a simple weight system to hold it in place at the bottom of the tool string rather than a mechanical latch. In other words, the latching mechanism is replaced by a weight system.

According to Davis, one critical design feature of this wireline core drilling system is the adaptation of the modular weight system to the Geoprobe® rod handler. “Once the weight system is initially put into the tool string, it’s not handled by us again until after the last sample has been retrieved from the borehole,” he said. During every sample extraction at ground surface, the weight system is easily handled by the rod handler and never by the driller or driller’s helper. “Coming from someone who spends their days outside working with tools, that’s a great thing!” Davis added.

The SDT60 Weighted Wireline system is designed to complement the standard SDT60 tooling. Davis recommends using standard SDT60 tooling with 2.25-in. center rods in softer, shallower formations. When deeper intervals (50 feet plus) or consolidated formations are encountered, “the weighted wireline core drilling system can easily be implemented without pulling the casing,” Davis added.

The SDT45 and SDT60 and the SDT45 and SDT60 Weighted Wireline systems are designed by and available exclusively through Geoprobe Systems®, and can be used under most sonic rigs.

Diamond core drilling tools is one of our key products, we specialized in design, production and sales of Q series including AQ, BQ, NQ, HQ, PQ etc sizes from 2009, currently our major products include diamond impregnated bits, surface set bits, PDC bits, reaming shell, core barrel, wireline drill rods, casing and casing shoe etc diamond core drilling consumables, which are applicable for mining, geotechnical exploration etc drilling jobs...

The Quick Descent™ Roller Latch™ head assembly continues to build on Boart Longyear’s legacy of innovative drilling technology and offers precise compatibility with all Genuine Q™ wireline systems.