Ditch magnet pdf

Ditch Magnets are particularly valuable during milling operations, wash overs and fishing jobs. Removal of mill cuttings and debris reduces the wear and tear of mud pumps and other equipment, as well as eliminating problems caused by the return down hole of harmful debris.

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Simplicity is kept in mind while high quality stainless steel is used to encapsulate a series of extra strength magnet elements, assuring ruggedness and maximum pick-up capacities. Equipped with integral handles at each end for easy lifting, our Ditch Magnets will hold in suspension approximately half of their weight in mill cuttings and other metal debris! Metallic particles passing by the Ditch Magnets will be attracted, caught and retained. Ditch Magnets should be used any time metallic particles may accumulate in the mud.

The mud then is brought through the annulus 34 between the drillpipe 20 and the surface pipe 16 through opening 36 and into trough Disposed in trough 38, which may be positioned to allow gravity flow, is housing As will be explained in detail subsequently, housing 40 contains magnetic means which remove ferrous material from the mud 24 as it flows through trough After the mud passes through the housing 40, the gravity flow allows the mud to return to mud tank It will be appreciated that variations may be made regarding positioning of the various elements shown in the mud circulation system but hous ing 40 of the present invention is to be placed between the output of mud from the well bore and the mud storage tank.

The present invention removes ferrous particles from the mud circulation system prior to passage-of the mud through the mud pump 28 thereby minimizing wear on the pump parts. Housing 40 includes an end member 42 having doors 44 and Door 44 may be coupled to end 42 through suitable fastening means 48 which may include hinges and a plurality of rivets such as rivet Door 46 is coupled to end member 42 through similar fastening means.

Doors 44 and 46 are hinged so that the housing 40 may be adapted to various sizes of troughs. Thus, housing 40 may be positioned in mud flow systems of various sizes and various capacities. Coupled to end 42 is upper member 52 having an opening Member 52 has a slot 56 at one end so that a gate 58 may be positioned in the slot 56 for controlling the quantity of mud which flows in opening 60 and which flows out of opening Opening 62 is positioned in end member 64 which has an opening Member 68 is coupled between end 42 and end 64 and member 68 has supports 70 and 72 positioned thereon.

Handles 74 and 76 are coupled on one side of member 68 and similar handles may be positioned on the other side of housing 40 to allow the apparatus of the present invention to be positioned easily in the flow-trough of a mud circulation system. Opening 54 allows easy removal of magnet assembly 78 for removing ferrous particles which have accumulated on magnet assembly Magnet assembly 78 has handles 82 and 84 positioned on each end of the magnet assembly 78 to allow magnet assembly 78 to be removed from the supports or baflles such as support It will be appreciated in viewing FIGURE 2 that the apparatus of the invention allows mud to pass through opening 60 over bafides such as bafile 80 and then the mud passes over or near the magnet assembly The mud then flows through opening 62 and the gate 58 controls the volume of mud which passes through the apparatus of the invention.

Door 46 is shown coupled to end member 42 as explained previously. The mud flow is shown by the arrows and the mud passes over or near magnet assembly 78 as explained previously. Bafile 88 is positioned between bafi'les 80 and 86 and causes turbulence in the flow of mud so that magnet assembly 78 acts on as much mud volume as possible thereby removing more ferrous material from the mud flow than has been heretofore possible with known apparatus similar to apparatus of the present invention.

It will be appreciated that baffles 80 and 86 are of a cradle or support type and hold magnet assembly 78 in FIGURE 3 shows the manner in which gate 58 restrictsthe flow of mud through the apparatus of the present invention according to the requirements of a particular mud circulation system.

Thus, the present apparatus has great versatility of use in mud circulating systems. A non-magnetic housing which may be made from fiber glass encloses three magnets 92, 94 and The three magnets are so positioned that the like polarity poles are near each other. Spacers 98, , and are positioned between the magnets and between the nonmetallic housing and the magnets.

Handles 84 and 82 are positioned on each end of the magnet assembly to allow the magnet assembly 78 to be easily moved. It will be appreciated in viewing FIGURE 4 that the I positioning of the three magnets allows large cylindrical magnets to be utilized and the non-metallic housing 90, which may be of fiber glass provides a better magnetic fluxfiow thereby givinga better result because more ferrous particles are removed from the drilling mud.

Handle 82 is shown coupled to the magnet assembly 78 which is positioned on support Support 72 is shown in FIGURE 5 and it will be appreciated that the mud flow through the apparatus of the present invention allows the mud to pass within the magnetic field of the magnet assembly to provide maximum removal of ferrous particles from the drilling mud.

FIGURE 6 is a perspective side vew of the magnet assembly 78 showing handles 82 and 84 positioned on the 'ends of the magnet assembly as explained previously. The apparatus of the present invention further provides a better magnet flux-flow through utilization of a non-magnetic housing such as Fiberglas for enclosing a plurality of magnets.

The apparatus of the present invention is adaptable for use with various size fiowtroughs and for mud circulation systems having various capacities.

I claim: 1. A mud circulation system including in combination: a mud storage source, pump means coupled to said source for pumping mud into a well bore, and magnet housing means positioned between said well bore and said mud storage source for removing ferrous particles from the mud, said magnet housing means including in combination:.

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