40results about How to "Improve job success rate" patented technology

The invention discloses a vortex sand washing device which comprises an upper connector, a tubing pup joint, a conversion body, a sand washing core tube, a revolving body and a sand washing head, wherein the upper connector is connected with the tubing pup joint, the conversion body, the sand washing core tube, the revolving body and the sand washing head in sequence; an annulus is formed betweenthe upper part of the inner pup joint of the conversion body and the cavity of the tubing pup joint; the lower end of the inner pup joint of the conversion body is provided with a stopper; a flow channel is arranged axially between the inner pup joint and the outer pup joint of the conversion body; the revolving body is arranged outside the sand washing core pipe and the sand washing head; and a bearing hoop is arranged between the lower cavity of the revolving body and the sand washing head. The vortex sand washing device adopts a double-tube structure, thus providing different channels for washing and upward-returning of sand washing fluid, and is characterized by high adaptability, high sand washing efficiency, high sand washing and well cleaning speed, good effect, high operation success rate and the like, thus being adapted to sand washing operation of common oil gas wells, especially to sand washing operation of highly-deviated wells and horizontal wells.

The invention discloses a double filtering-layer meandering circumferential weld self-cleaning sieve tube which is composed of a filter element and a basal tube; the filter element is embedded in a stepped hole at the side wall of the basal tube and is composed of a central cap, a plurality of filtering rings, a fixed ring and a protective cover. The size of the inner diameter of the filtering rings are increased one by one and the inner wall of each filtering ring is a double-stair shape, the outer wall of each filtering ring is an inverted double-stair shape. The outer wall of the central cap is an inverted double-stair shape and the central cap are sheathed in the filtering ring with the smallest inner diameter; all the filtering rings are axially sheathed together according to the size order of the inner diameter. The inner wall of the fixed ring is a double-stair shape and the filtering ring with the largest inner diameter is sheathed in the fixed ring; the outer wall of the fixed ring is an inverted double-stair shape and the upper part of the fixed ring is a conical surface and the lower part thereof is a cylindrical surface. The protective cover is covered on the conical surface of the outer wall of the fixed ring, a plurality of air vent windows are opened on the top surface of the protective cover. The double filtering-layer meandering circumferential weld self-cleaning sieve tube can filter the thin-fine sand, the permeability is high, the filter precision is high, and the filtering seam has extremely strong damage-resistance capacity and is not easily to block.

The invention discloses an AUV underwater retracting system, and relates to the technical field of AUV. The AUV underwater retracting system pulls a capturing taper sleeve through a pulling mechanism,the negative pressure suction formed in an inner cavity of the capturing taper sleeve is converted into a dragging force applied on the AUV to be retracted by using pumping of a pump, and thus safe,reliable, rapid and hidden underwater retracting of the AUV is realized.

The invention provides a structure of chip bearing discs. The structure is used for containing a plurality of chips. The chip bearing discs are provided with a plurality of inversed alignment pieces, the inversed alignment pieces of the chip bearing disc containing the multiple chips are matched with the inversed alignment pieces of the chip bearing disc without the chips, and the chip bearing disc containing the multiple chips can be overturned to be inversely arranged on the other chip bearing disc so that the chips can be overturned to be really inversely arranged into the other chip bearing disc; in addition, the chip bearing discs are further provided with a plurality of stacking alignment pieces, the stacking alignment pieces are arranged on the chip bearing discs in an asymmetric mode to assist in stacked alignment of the multiple bearing discs, and the stacking direction of the stacked bearing discs is limited.

The invention discloses a real-time monitoring system of down-hole tension of a single-core cable used for perforating and a monitoring method thereof. The monitoring system comprises surface equipment and down-hole equipment, the surface portion comprises a display screen and a control panel, the display screen is connected with the control panel, the down-hole portion comprises a down-hole instrument string formed by sequentially connecting a locating sub, a tension sub and an explosion-proof isolation sub, the explosion-proof isolation sub is connected with a perforating gun, the control panel is connected with the locating sub, the tension sub and the explosion-proof isolation sub through the single-core cable separately, and control circuits of the locating sub, the tension sub and the explosion-proof isolation sub are connected with in parallel. By means of the system and the method, tension change of the down-hole cable is measured in real time, and tension signals are uploadedto the ground for display through the single-core cable, so that visual guidance is provided for cable tube column pumping operation of a horizontal well section, and a basis is provided for judging the stress state of a down-hole tube string.