Abstract: A composition is for making a drilling fluid a non-invasive drilling fluid. The composition has a first component comprising particles having a scratch hardness above 2 Mohs and a second component comprising particles selected from the group of fragmented seeds of Tamarindus indica, comminuted bark from Litsea glutinosa, or comminuted Ocimum tenuiflorum. Also disclosed is a non-invasive drilling fluid having the composition, and a method for drilling a wellbore.

Abstract: A composition is for making a drilling fluid a non-invasive drilling fluid. The composition has a first component comprising particles having a scratch hardness above 2 Mohs and a second component comprising particles selected from the group of fragmented seeds of Tamarindus indica, comminuted bark from Litsea glutinosa, or comminuted Ocimum tenuiflorum. Also disclosed is a non-invasive drilling fluid having the composition, and a method for drilling a wellbore.

Abstract: This invention relates to a sieving apparatus and method for separating solid particles above a predetermined size from a fluid by carrying the solids-containing fluid across at least one sieving cloth in a frame connected to a shaking device for providing shaking motion. The sieving apparatus includes an inlet portion for receiving solids-containing fluid, a discharge portion for solids that have been carried across the at least one sieving cloth and an outlet portion for fluid that has passed through the sieving cloth. The sieving apparatus further includes at least one endless sieving cloth arranged for rotating around at least two spaced-apart turning-rollers, at least one being connected to a motor, and a pumping device in fluid communication with a suction nozzle located proximate an underside of the endless sieving cloth between two of the turning-rollers, to produce a fluid flow through at least a portion of the endless sieving cloth.

Abstract: A device is for separating a medium comprising a mixture of a solid portion and a fluid portion. The device has a filter arrangement with a displaceable filter element having a plurality of openings that allow the fluid to be disposed through the openings while maintaining the solid portion on the filter element. The device further has an inlet for feeding the medium to the filter element and an outlet for discharging the solid portion from the filter element after that the fluid has been separated from the solid portion. The device further has an obstruction has an elastic element extending towards a surface of the filter element and adapted to contact the surface while allowing the medium to be displaced from the inlet to the outlet.

Abstract: An apparatus and a method is described to facilitate separation of hydrocarbons from solid particles (29) being contaminated with hydrocarbons. The apparatus (1) includes a container (3) having a closeable inlet portion (20) for solid particles; a support body (11) in fluid communication with the closeable inlet portion (20), where the support body (11) is arranged to carry the solid particles (29) led in through the inlet portion (20), as the container is connected to an under-pressure generating device (7) to provide an under-pressure in the container (3).

Abstract: A device is for separating a medium comprising a mixture of a solid portion and a fluid portion. The device has a filter arrangement with a displaceable filter element having a plurality of openings that allow the fluid to be disposed through the openings while maintaining the solid portion on the filter element. The device further has an inlet for feeding the medium to the filter element and an outlet for discharging the solid portion from the filter element after that the fluid has been separated from the solid portion. The device further has an obstruction has an elastic element extending towards a surface of the filter element and adapted to contact the surface while allowing the medium to be displaced from the inlet to the outlet.

Abstract: An apparatus and a method is for separating liquid from a material comprising a solid fraction and a liquid fraction. The apparatus has a conveyor belt for bringing the material from a receiving portion to a discharge portion. At least a portion of the conveyor belt is provided with at least one sorption means for absorbing and/or adsorbing liquid from the material while the material is carried between the receiving portion and the discharge portion.

Abstract: This invention relates to a sieving apparatus and method for separating solid particles above a predetermined size from a fluid by carrying the solids-containing fluid across at least one sieving cloth in a frame connected to a shaking device for providing shaking motion. The sieving apparatus includes an inlet portion for receiving solids-containing fluid, a discharge portion for solids that have been carried across the at least one sieving cloth and an outlet portion for fluid that has passed through the sieving cloth. The sieving apparatus further includes at least one endless sieving cloth arranged for rotating around at least two spaced-apart turning-rollers, at least one being connected to a motor, and a pumping device in fluid communication with a suction nozzle located proximate an underside of the endless sieving cloth between two of the turning-rollers, to produce a fluid flow through at least a portion of the endless sieving cloth.

Abstract: A sieve device (1) for untreated drilling mud being brought up from a well and a method for use is provided. The sieve device (1) has a filter device (3) to separate a share of the drilling liquid from the drill cuttings. The sieve device (1) connects to a first outlet that receives drilling cuttings held back on the filter device (3) and a second outlet (11) that receives drilling liquid flowing from the filter device (3). The sieve device (1) also has at least one secondary filter (13) to separate drill cuttings from drilling liquid, a filter guard (17) being arranged in connection with the secondary filter (12), and a bypass arrangement (19) by means of which the filter guard (17) is arranged to open for communication of untreated drilling mud held back on the secondary filter (13), into the second outlet (11) for drilling liquid.

Abstract: This invention relates to a sieve cloth and a method of connecting the sieve cloth to a sieve apparatus having an endless sieve cloth supported by a support belt which, in operation, is structured to rotate around at least two spaced-apart turning rollers. The method includes the steps of providing at least one sieve cloth sheet having an upper side, a lower side, two side portions and a first end portion and a second end portion extending between the side portions; bringing at least a portion of the sieve cloth sheet into engagement with a portion of the support belt; positioning the sieve cloth sheet against the support belt by moving the support belt around the turning rollers; bringing at least two adjoining end portions into engagement with each other until the at least one sieve cloth sheet forms an endless sieve cloth.

Abstract: A method and an apparatus for monitoring the integrity of an endless sieve device (3) which is arranged to rotate around at least two spaced-apart turning rollers are described, the sieve device (3) being arranged to separate fluid and particles under a predetermined size from particles over the predetermined size, the method including the steps of: positioning at least one signal transmitter (7) at a portion of the sieve device (3) by means of a holding device (5, 5?, 5?); putting the at least one signal transmitter (7) in communication with at least one receiver (9), so that the signal transmitter (7) outputs a signal to the at least one receiver (9) at least once per turn of the sieve device (3); exposing the holding device (5, 5?, 5?) to wear; and letting the receiver (9) output a signal activating a warning device when the expected signal from the signal transmitter (7) ceases.

Abstract: A method of controlling separation of solid particles from a fluid is described, wherein the separation is carried out by means of a sieve apparatus (10) which includes an endless sieve cloth (1) structured in a manner allowing it to rotate around at least two spaced-apart turning rollers (14), wherein the method comprises: arranging at least two sieve cloth sheets (1?) in series in the direction of movement of the sieve cloth (1), wherein at least two of the at least two sieve cloth sheets (1?) have dissimilar filtering characteristics; controlling the endless sieve cloth (1) by rotating the turning rollers (14) in such a manner that a desirable amount of solid particles and fluid is supplied to at least one of, or is distributed between two or more of, the at least two sieve cloth sheets having desirable filtering characteristics. A sieve cloth for use in the method is also described.

Abstract: The present invention describes an apparatus (1) for the sieving and fluid separation of a material containing fractions of a solid and fluid, the material being placed on an upper side of at least one sieving element (13), and the apparatus (1) being provided with at least one fluid-flow-generating device (5) for the production of a fluid flow through a portion of the material-carrying sieving element (13). The invention also describes a method of using the apparatus (1).

Abstract: A method of controlling separation of solid particles from a fluid is described, wherein the separation is carried out by means of a sieve apparatus (10) which includes an endless sieve cloth (1) structured in a manner allowing it to rotate around at least two spaced-apart turning rollers (14), wherein the method comprises: arranging at least two sieve cloth sheets (1?) in series in the direction of movement of the sieve cloth (1), wherein at least two of the at least two sieve cloth sheets (1?) have dissimilar filtering characteristics; controlling the endless sieve cloth (1) by rotating the turning rollers (14) in such a manner that a desirable amount of solid particles and fluid is supplied to at least one of, or is distributed between two or more of, the at least two sieve cloth sheets having desirable filtering characteristics. A sieve cloth for use in the method is also described.

Abstract: This invention relates to a sieve cloth and a method of connecting the sieve cloth to a sieve apparatus of a type having an endless sieve cloth supported by a support belt which, in operation, is structured in a manner allowing it to rotate around at least two spaced-apart turning rollers. The method includes the steps of providing at least one sieve cloth sheet having an upper side, a lower side, two side portions and a first end portion and a second end portion extending between the side portions; bringing at least a portion of the sieve cloth sheet into engagement with a portion of the support belt; positioning the sieve cloth sheet against the support belt by moving the support belt around the turning rollers; bringing at least two adjoining end portions into engagement with each other until the at least one sieve cloth sheet forms an endless sieve cloth. A method of controlling the separation of solid particles from a fluid is also described.

Abstract: A method and an apparatus for monitoring the integrity of an endless sieve device (3) which is arranged to rotate around at least two spaced-apart turning rollers are described, the sieve device (3) being arranged to separate fluid and particles under a predetermined size from particles over the predetermined size, the method including the steps of: positioning at least one signal transmitter (7) at a portion of the sieve device (3) by means of a holding device (5, 5?, 5?); putting the at least one signal transmitter (7) in communication with at least one receiver (9), so that the signal transmitter (7) outputs a signal to the at least one receiver (9) at least once per turn of the sieve device (3); exposing the holding device (5, 5?, 5?) to wear; and letting the receiver (9) output a signal activating a warning device when the expected signal from the signal transmitter (7) ceases.

Abstract: An apparatus (1) and a method for ad-mixing an additive for a drilling fluid for use in the drilling of a petroleum well are described. The apparatus (1) includes: a mixing chamber (3) which is connected, in terms of fluid, to an inlet line (5) for drilling fluid, an outlet line (7) for drilling fluid and at least one dosing device (9, 9?) for an additive, the dosing device (9, 9?) being arranged to supply the additive from a container (11, 11?) to the mixing chamber (3) and to form a pressure-tight barrier between the mixing chamber (3) and the container (11, 11?); and a pumping device (13) arranged downstream of the mixing chamber (3), which is arranged to suck drilling fluid through the mixing chamber (3).

Abstract: An apparatus and a method is described to facilitate separation of hydrocarbons from solid particles (29) being contaminated with hydrocarbons. The apparatus (1) includes a container (3) having a closeable inlet portion (20) for solid particles; a support body (11) in fluid communication with the closeable inlet portion (20), where the support body (11) is arranged to carry the solid particles (29) led in through the inlet portion (20), as the container is connected to an under-pressure generating device (7) to provide an under-pressure in the container (3).

Abstract: A sieve device (1) for untreated drilling mud being brought up from a well and a method for use is provided. The sieve device (1) has a filter device (3) to separate a share of the drilling liquid from the drill cuttings. The sieve device (1) connects to a first outlet that receives drilling cuttings held back on the filter device (3) and a second outlet (11) that receives drilling liquid flowing from the filter device (3). The sieve device (1) also has at least one secondary filter (13) to separate drill cuttings from drilling liquid, a filter guard (17) being arranged in connection with the secondary filter (12), and a bypass arrangement (19) by means of which the filter guard (17) is arranged to open for communication of untreated drilling mud held back on the secondary filter (13), into the second outlet (11) for drilling liquid.

Abstract: A system and method for the treatment of a fluid comprising at least two of the fractions solid particles, liquid and/or gas is described having at least one inlet portion and two or more outlet portions, and being arranged to separate solid particles over a predetermined size from the liquid by at least one screening apparatus and then carrying the fractions out of the system. The system (1) being substantially fluid-tight between the at least one inlet and outlet inlet portions and being provided with at least one underpressure-generating device arranged to provide an underpressure in the system.