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Horizontal well directional sand blasting perforation and fracturing integral tool pipe column and construction method thereof

The invention relates to a horizontal well directional sand blasting perforation and fracturing integral tool pipe column and a construction method thereof. The tool pipe column comprises a safe joint, a first centralizer, a first rotating joint, a hydraulic sand blasting device, a second rotating joint, a second centralizer, a packer, a coupling positioning device and a guiding shoe, wherein the safe joint is arranged at the left end of the tool pipe column; the guiding shoe is arranged at the right end of the tool pipe column; the left end of the safe joint is connected with an oil pipe; the first centralizer, the first rotating joint, the hydraulic sand blasting device, the second rotating joint, the second centralizer, the packer and the coupling positioning device are sequentially arranged between the right end of the safe joint and the guiding shoe from left to right. The horizontal well directional sand blasting perforation and fracturing integral tool pipe column and the construction method provided by the invention have the advantages that the structure of the tool pipe column is simple; the directional san blasting perforation can be realized; the stratum energy is released to the greatest degree; the problem of shot hole compression zone of gunpowder perforation can be solved.
Owner:JEREH ENERGY SERVICES

Identification method for handwritten character strings in air

The invention discloses an identification system and method for handwritten character strings in air. The system comprises a gesture identification module, a finger track extraction module, a pretreatment module and a character string identification module, wherein the gesture identification module is connected with the finger track extraction module and used for recognizing and identifying gestures for starting and ending writing; the finger track extraction module is connected with the pretreatment module and used for performing finger track extraction and record on input handwriting actions; the pretreatment module is connected with the in-air handwritten character string identification module and used for pre-treating finger track data; and the character string identification module is connected with the pretreatment module and used for performing character string identification on the finger track data. The invention further discloses the identification method for the handwritten character strings in air. According to the identification system and method, the supported writing mode is novel and convenient, the identification is accurate and fast, a more humanized and intelligent handwriting input mode other than the traditional handwritten mode is provided for people, and the system and the method can be widely applied to human-computer interaction systems such as game operation, television control, a teaching system and the like.
Owner:北京中科阅深科技有限公司

Method for putting in and taking out coiled tubing being used as production tubing string

ActiveCN105275417ASafe and reliable downloadingSafe and reliable entryBorehole/well accessoriesTubing hangerCoiled tubing
The invention discloses a method for putting in and taking out a coiled tubing being used as a production tubing string. The method for putting in the coiled tubing being used as a production tubing string comprises steps of mounting a well head blowout preventer system, an injection head and the coiled tubing above a tubing head four-way joint and a main valve, mounting a tool string to the lower end of the coiled tubing, and putting into a designed depth; cutting the coiled tubing off by a shear ram of a first blowout preventer; sequentially mounting a hanging connector and a tubing hanger to the upper end of the cut low-half coiled tubing, stretching the cut up-half coiled tubing out of a blowout preventing tubing, and connecting the cut up-half coiled tubing with a hydraulic retractable feeding/recycling tool; putting the tubing hanger in the tubing head four-way joint; and fixing the tubing hanger of the coiled tubing into the tubing head four-way joint. According to the method for putting in and taking out the coiled tubing being used as the production tubing string, the coiled tubing replaces a conventional tubing and is directly used a production tubing string, a standard gas production tree well head is achieved after construction, and the sealing effect of the well head can be ensured at the same time.
Owner:CHINA PETROLEUM & CHEM CORP +5
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