A method for determining a screen break may include obtaining a fluid stream after a screening system in a drilling process; placing the fluid stream into a screen break detector; obtaining a pressure within a well of the screen break detector when the screening system is in a first state; obtaining a pressure within the well of the screen break detector when the screening system is in a second state; determining a differential pressure within the well of the screen break detector obtained when the screening system is in the second state compared to the pressure when the screen break is in the first state; and transmitting a notification to an operator when the pressure within the screen break detector obtained when the screening system is in the second state is greater than the pressure within the screen break detector when the screening system is in the first state.

Vibratory screening machines that include stacked screening deck assemblies are provided. In some embodiments, at least one of the vibratory screening machines may include an outer frame, an inner frame connected to the outer frame, and a vibratory motor assembly secured to the inner frame for vibrating the inner frame. A plurality of screen deck assemblies may be attached to the inner frame in a stacked arrangement, each configured to receive replaceable screen assemblies. The screen assemblies may be secured to respective ones of the plurality of the screen deck assemblies by tensioning the screen assemblies in a direction that a material to be screened flows across the screen assemblies. An undersized material discharge assembly may be configured to receive materials that pass through the screen assemblies, and an oversized material discharge assembly having a deflector may be configured to receive materials that pass over the screen assemblies.

A basket system for a shale shaker includes a front, solids discharge end and a rear, feed end, spaced apart by opposed first and second sides. The feed end includes a fluid retaining wall. A first screen deck frame is mounted or mountable to the basket for supporting a screening surface and forming a first screen deck in use. The screening surface of the first screen deck has a lower, feed receiving end that is proximal to the fluid retaining wall at the rear end of the basket and a distal, higher, solids discharge end at the front end of the basket. The basket further includes at least one mounting for mounting at least one additional screen deck frame above or below the first screen deck frame.

A method and apparatus for the separation of gas and liquid-solid slurry under pressure, and passage of the liquid-solid slurry to an atmospheric discharge.

The present application discloses an active sorting muck-collecting device for slurry balancing shield, aiming at solving a technical problem that an existing muck-collecting device cannot provide reliable sorting function for a shield slurry circulation system. The device includes a sorting stirring cylinder, a circulation pipeline and a muck-collecting box, the sorting stirring cylinder includes an outer cylinder and a rotatable grid cylinder coaxially-configured. The grid cylinder is configured with a rotating shaft, and a spiral conveying mechanism is fixedly configured inside. The rotating shaft is fixedly connected with the grid cylinder. A circulation pipeline communicated with the grid cylinder is correspondingly configured below the grid cylinder. A muck-collecting box is fixedly configured below the circulation pipeline, and the muck-collecting box is communicated with the grid cylinder at where an output end of a slurry discharging pipeline locates.

A continuous sieving apparatus is described. The continuous sieving apparatus includes an inclined sieve surface attached to a wall. The inclined sieve surface is inclined with respect to a horizontal axis for pupae to continuously flow across down the incline. A set of openings is formed in the sieve surface so as to define a set of pathways extending through the sieve surface. The set of opening are defined by a length dimension that is greater than a width dimension. When the inclined sieve surface is submerged in a liquid, a first pupa having a first cephalothorax width that is less than the width dimension is free to move through any one of the set of openings, and a second pupa having a second cephalothorax width that is greater than the width dimension is prevented from moving through the set of openings.

The present invention is directed to a drilling fluid reclaimer. The reclaimer has at least one adjustable screen assembly for providing a leveling filter for reclaimed drill fluid. Used drill fluid is placed at the screen assembly at the front the of the screen assembly. The at least one screen is vibrated to separate large particulate matter from liquid drilling fluid. A second screen is provided for additional filtering. Large particulate matter is expelled by a chute at the back of the screen assembly. Drilling fluid passing through the screen is “reclaimed” for use with a drilling system.

A shale shaker includes a basket having a front, solids discharge end and a rear, feed end spaced apart by opposed first and second sides. The basket includes a lower, first, screen deck and an upper, second, screen deck directly above the first screen deck. The screening surfaces of the screen decks are spaced apart, by a vertical spacing of from 20 mm to 250 mm. There is a cavity above the feed receiving end of the first screen deck, in direct fluid communication with the space between the screening surfaces of the first and second screen decks ( ) that only receives feed that has passed through the upper, second, screen deck. The cavity extends to higher than the extreme end of the screening surface of the second screen deck, at its feed receiving end.

An apparatus for washing and grading sand and aggregate includes an aggregate grading and washing screen with a plurality of vertically stacked decks for producing a plurality of aggregate products therefrom, and at least one sump for collecting undersize material comprising sand and water from the plurality of decks. A plurality of sand washing and grading units each include a first hydrocyclone, a vibratory screen having a deck, and a sump beneath the deck for receiving undersize material and water passing through the deck. The deck of the vibratory screen receives an underflow from the first hydrocyclone. A further hydrocyclone receives undersize material and water from the vibratory screen's sump. Underflow from the further hydrocyclone is delivered onto the deck of the vibratory screen. The first hydrocyclone of each sand washing and grading unit receives undersize material and water from the sump of the aggregate washing and grading screen.

A method for recovering metals from waste in which material is roughly or coarsely separated to leave a fibrous feedstock, the feedstock is comminuted with a mill (e.g., a ball mill) to liberate and separate the fibrous feedstock to obtain a mix of a metal fraction and residue, and the metals fraction and the residue are collected. There is a system employing the same to treat such materials.