Abstract:
A method of installing a reception device in a cased well at an optimum depth for surveying a formation under production or a localized part thereof and a source of acoustic waves at the surface or in a well. A placing or setting of the device is achieved by associating a plurality of acoustic wave reception units with a tubing lowered into the well and by applying the respective units against the pipe casing of the well by arms and springs or by including the reception units in sondes which are mechanically uncoupled from the tubing during the stages of use, with the reception device being easily moved by displacing the tubing during, for example, interruptions in the production of effluents.
Abstract:
A device is provided for anchoring a probe in a well by remote control spreading, from the surface, of at least one anchorage arm kept in a closed position by a retractable bolt engaged in a rod connected to the anchorage arm by links. The external pressure is exerted permanently on the bolt and the bolt is fast with a head movable in a cavity. A pressure is applied to the head which is proportional to the external pressure which holds the bolt locked in the rod or a much lower pressure resulting in release of the bolt.
Abstract:
Process for producing a hydrocarbon cut of high octane number by etherification of an olefin-containing hydrocarbon cut.The olefinic cut, to which methanol is added, passes into an etherification reactor (1) wherefrom are separated (3) a bottom product (15) containing ethers, and a top product (14) containing residual methanol and unreacted light olefins. This top product passes into an etherification reactor (2) and then is washed with water (8).The top product is finally admixed with the bottom product.The so-obtained motor-fuel has a higher octane number than that of the initial hydrocarbon cut.
Abstract:
This device comprises two movable elements of rigid material tightly interconnected by means of a deformable membrane forming therewith a tight internal enclosure, means for varying abruptly the volume of said enclosure by successively moving the two elements away from each other, maintaining them in spaced relationship and allowing them to be urged toward each other by the effect of the external hydrostatic pressure, in which the means for moving the two elements away from each other includes two cylinders and at least one piston slidable in one of said cylinders, associated to one of said movable elements and also to a push-member slidable in one of the cylinders and bearing on the other movable element and means for feeding said cylinder with pressurized fluid so as to maintain the elements in spaced relationship or to release them.
Abstract:
This device comprises two movable elements of rigid material tightly interconnected by means of a deformable membrane forming therewith a tight internal enclosure, means for varying abruptly the volume of said enclosure by successively moving the two elements away from each other, maintaining them in spaced relationship and allowing them to be urged toward each other by the effect of the external hydrostatic pressure, in which the means for moving the two elements away from each other includes two cylinders and at least one piston slidable in one of said cylinders, associated to one of said movable elements and also to a push-member slidable in one of the cylinders and bearing on the other movable element and means for feeding said cylinder with pressurized fluid so as to maintain the elements in spaced relationship or to release them.
Abstract:
Pressure sensor comprising a rigid tubular element housing an elongated support member, solid or fixed with the sensitive element in the vicinity of one of its end portions, said support element being made of a deformable material and comprising an enlargement shifted or extended with respect to said end portions and in contact with the internal surface of the tubular element.
Abstract:
The invention relates to a method of manufacturing sheets based on hydraulic binder, particularly sheets of plasterboard with feathered edges. This method comprises the steps of: 1) making a mark (301) on a facing (2 or 3) of the preform (5); 2) detecting the mark (301); and 3) sending an actuating signal to a device (9) for cutting the preform (5). The invention also relate to a production line for producing such sheets, and to an apparatus, particularly for making an impression (12, 12bis) in a preform (5). This apparatus comprises: a frame (101); first (102, 103) and second (105, 106) pulleys; two belts (108, 109) wrapped around the pulleys (102, 103, 105, 106); at least one wire (111) extending between these belts (108, 109) so that its axis is parallel to the axis of the pulleys (102, 103, 105, 106).
Abstract:
A production line for producing sheets based on hydraulic binder, the production line including in an upstream zone of the production line, marking device for marking a facing material of the preform with a mark; in a downstream zone of the production line, detecting device for detecting the mark made by the marking device; a cutting device; and an actuating device for actuating said cutting device after receiving a detection signal from the detection device.
Abstract:
The invention is a method and device for permanent seismic monitoring of an underground formation by means of one or more seismic emission-reception sets comprising a source (S) such as a vibrator and elastic wave receivers (R1, R2, . . . , Rn) such as geophones and/or hydrophones. A well (W) is drilled into the ground. Seismic receivers (R1 to Rn) are lowered therein and coupled with the surrounding formation. The section of the well is widened in the upper part thereof so as to form a cavity (P) against whose walls the seismic source (S) is pressed. Receivers (R) and source (S) are connected to an outside signal control and acquisition station (ST). The wells (W) can be exploration wells that are drilled for example around wells intended for production of reservoirs containing fluids, or mixed exploration and production wells. Each source can also be coupled with a cavity next to the well. The operations intended for setting of these equipments are relatively simple and the site coverage area of the various wells is reduced, which facilitates their integration in reservoir production sites. The method and device can be applied for monitoring of oil-bearing reservoirs or of gas storage reservoirs.
Abstract:
The hydrophone according to the invention comprises at least one detection unit (1) comprising a casing made up of two cups (2a, 2b) resting on each other by a peripheral rim (3), each one of them being provided with a flexible central part, and a sensitive element (4) associated with electrodes, that is fastened to the central part of the cups, on the outer face thereof, a hollowed flat centering element (6) made of a deformable material, into which at least one casing is fitted, intended to be inserted into a tube (9) along an axial plane thereof, this centering element being provided for example with an inner slot (8) for fitting in the peripheral rim of the two cups (2a, 2b) of the casing, and a sealed protective coating (11) sheathing detection unit (1), and a part of the inner face of tube (9). Once the centering element is introduced in the tube, the substance forming the coating is injected into a thin space provided around the centering element by a two-legged moulding piece (13a, 13b) that is inserted into the tube. The hydrophone can be used in geophysical prospecting or subsea listening for example.