33 results about "Invasion depth" patented technology

An optical analyzer performing analysis excellent in spatial resolution and in invasion depth is provided. The analyzer includes a diagnostic light source section including a seed light source which outputs seed light, and a silica optical fiber to which seed light is input and which generates diagnostic light having a HE11 mode field pattern utilizing a nonlinear optical phenomenon, an irradiation optical system converging the diagnostic light and irradiating a measurement subject with the diagnostic light, an acquisition optical system acquiring object light generated at the measurement subject, a spectrum measurement section receiving the object light and measuring a frequency spectrum of the object light, a storage section storing information of a frequency spectrum of a known substance, and an arithmetic section calculating a correspondence between the frequency spectrum of the object light and the frequency spectrum of the known substance, and analyzing the measurement subject based on the calculation result.

A method for determining water saturation in a subsurface formation include determining an invasion depth in the formation from a plurality of measurements made within a wellbore drilled through the formation. The measurements have different lateral depths of investigation into the formation. Carbon and oxygen in the formation are measured at substantially a same longitudinal position as at a position of the determining the invasion depth. The measured carbon and oxygen and the invasion depth are used to determine the water saturation in a substantially uninvaded part of the formation.

The invention provides a tester for the bearing and plugging strength of a mud cake under high temperature and high pressure, which can simulate the static conditions in a well and test the invasion depth of slurry filter liquid, bearing strength of mud cake, plugging and bearing strength against cracks in drilling for oil (gas) wells. The tester essentially comprises a mud-cake performance evaluation and test vessel assembly, a pressure pipe system, a temperature control system, a displacement record system, an automatic cleaning system and a computer data processing system. The tester allows all-sided simulation of the temperature, pressure and stratum features (seepage) under a well, determination the plugging and bearing strength of mud cakes, optimization of drilling fluid, rapid andsafe drilling, therefore the tester is of a very wide application prospect.

The invention relates to a visual simulation shale micro-crack plugging capacity test system and a visual simulation shale micro-crack plugging capacity test method. Displacement evaluation experiment is performed on a single or combined micro-crack rock sample by a solution or a drilling fluid which contains the plugging agents with different concentrations and different types at different experiment conditions, such as pressure differences and times, indexes, such as the invasion depth, are compared, the formation conditions of inner mud cakes in drilling are directly described, and microscopic observation and analysis are performed on percolation substances invade into the micro-cracks by utilizing amplification imaging instruments, such as a high-definition microscope, so that the plugging mechanisms and the effects of various drilling fluid plugging agents and drilling fluids are analyzed and researched intuitively and microscopically, a proper drilling fluid plugging agent is selected preferably, a drilling fluid system formula is optimized, the problem about the experimental conditions that the visual simulation evaluation cannot be performed on shale micro-crack plugging in the past is solved, and a new evaluation experimental research means is provided for related research and production in the technical field of fractured shale strata borehole wall stability in petroleum engineering.

The invention discloses a preparation method of a cationic plugging agent for a drilling fluid. The cationic plugging agent is prepared by emulsion polymerization from raw materials in parts by weight as follows: 30-90 parts of styrene, 5-75 parts of butyl acrylate and 15-75 parts of dimethyl diallyl ammonium chloride. Monomers are initiated by an initiator to be subjected to a polymerization reaction, and the cationic plugging agent with the macromolecular chain is obtained; with addition of a small quantity of the product to the drilling fluid, the filtration loss of the drilling fluid and the invasion depth in the sand bed can be effectively reduced, plugging of underground pore cracks is realized, and drilling safety is guaranteed.

The invention relates to a medical instrument, in particular to a uterine manipulator capable of achieving accurate positioning. The uterine manipulator comprises a uterine lifting cup, a hollow operating rod and a guide rod, wherein the hollow operating rod is connected to the uterine lifting cup and the guide rod is arranged in an inner cavity of the operating rod and is capable of extending out of the uterine lifting cup; the uterine lifting cup is composed of two parts, namely an upper part and a lower part; the lower part is fixedly connected to the operating rod, and the lower part, in the axial direction of the peripheral wall thereof, is provided with a plurality of annular grooves which are spaced from each other; and the upper part includes a plurality of blades which are fixedly connected to the lower part and are spaced from each other in a circumferential direction. By virtue of the plurality of the grooves which are arranged on the uterine lifting cup, a doctor, in a cervical carcinoma lesion resection, can determine the length of vagina to be resected according to the positions of the corresponding grooves, so that a lesion can be accurately and completely resected; in addition, the operating rod is provided with two scales of which one is capable of judging the invasion depth of the operating rod and the other one is capable of judging the length of the guide rod extending into a uterine cavity. Therefore, the uterine manipulator disclosed by the invention can achieve accurate positioning by virtue of the uterine lifting cup, the operating rod and the guide rod.

The invention discloses a kit used for assistant determination of clinical early stage endometrial carcinoma lymphonodus metastasis. The kit comprises a parameter acquisition equipment and a readablecarrier; the parameter acquisition equipment comprises an equipment used for acquiring a plurality of parameters relates to the readable carrier; the readable carrier is used for recording following content in formula I: LogitP=-4.992+1.606*G2+2.375*G3+1.383*C+0.871*H+0.869*F, wherein G is used for representing tumor grading value, C is used for representing serum CA125 concentration value, H is used for representing tumor myometrium invasion depth value, F is used for representing cervical stromal involvement degree value, and P is used for representing clinical early stage endometrial carcinoma lymphonodus metastasis risk of human subjects. The kit is used for assistant determination of clinical early stage endometrial carcinoma lymphonodus metastasis risk of human subjects based on clinically easily available tumor differentiation grading, serum CA125 concentration, tumor myometrium invasion depth, and cervical stromal involvement degree.

The invention relates to a kind of concrete surface free SO 4 2‑ Detection method of ion erosion depth. This method is used when the concrete is subjected to external SO 4 2‑ In the case of penetrating erosion, use a special color developer to develop color on the concrete section, and use the color difference to judge the depth of sulfate attack in the concrete. The color development principle of the color developer is through the red precipitation of barium roseate and free SO in concrete 4 2‑ undergoes a displacement reaction to form white BaSO 4 Precipitation, in the concrete section (with SO 4 2‑ A color dividing line appears on the same erosion direction). The advantage of this method is that it is simple and easy to operate, the reaction phenomenon is obvious, and the color boundary formed can be maintained for a long time. It can be used not only for laboratory testing but also for external SO in concrete in engineering use. 4 2‑ On-site detection of penetration depth.