88 results about "Well integrity" patented technology

The invention relates to a dual-interlayer symmetrical multi-pyramid configuration three-dimensional integrally-braid lattice composite material and a preparation method thereof. The composite material comprises an upper panel layer, a middle panel layer, a lower panel layer and lattice core layers arranged between the upper panel layer and the middle panel layer as well as between the middle panel layer and the lower panel layer. The composite material is characterized in that the upper panel layer, the middle panel layer and the lower panel layer form a dual-interlayer structure, the lattice core layers are of a space network truss structure consisting of symmetrical multi-pyramid configuration unit cells arranged periodically and communicated through holes, and the lattice core layers, the upper panel layer, the middle panel layer and the lower panel layer are weaved, alternated, wound and sutured into a whole according to the design rule and are subjected to once resin injection forming by adopting a resin transfer process. The preparation method in the invention comprises the steps of: 1, preparing the upper panel layer, the middle panel layer and the lower panel layer; 2, drilling a needle hole; 3, preparing the lattice core layers; and 4, curing and forming resins. The composite material prepared by the method has better integrity, more excellent mechanical property, lighter mass, higher bearing efficiency and better functionality in comparison with the traditional interlayer structure composite material.

Improved methods and apparatuses for directly monitoring well casing strain and structural integrity are disclosed that allows for monitoring of potentially damaging strain from any orientation or mode and over long stretches of well casing. In a preferred embodiment, optical fiber sensors are housed within a housing and attached to the exterior surface of the casing. The sensors may be aligned parallel, perpendicular, or at an appropriate angle to the axis of the casing to detect axial, hoop, and shear stresses respectively. The sensors are preferably interferometrically interrogatable and are capable of measuring both static and dynamic strains such as those emitted from microfractures in the well casing. Analysis of microfracture-induced acoustics includes techniques for assessment of relatively high frequencies indicative of the presence of microfractures. Assessment of the timing of the arrival of such acoustics at various sensors deployed along the casing further allows for the location of strain to be pinpointed.

The invention provides a cross steel plate water-stopping joint of a continuous concrete wall and a joint construction method thereof. The cross steel plate joint comprises a longitudinal water-stopping steel plate and a horizontal head steel plate, wherein the longitudinal water-stopping steel plate is about 35-50 cm long, a detouring flow line of cement slurry is lengthened, the impermeability of the joint of the continuous concrete wall is enhanced, the bottom of the horizontal head steel plate extends to the tank bottom level or is inserted into the soil by 20 cm, and the detouring flow line of concrete and sand pulp along the bottom of the head steel plate is blocked; during constructing, a cross steel plate and a steel reinforcement cage are welded into a whole which is then deposited into a tank section so that the joint and a wall body have better integrity; a counterforce box is deposited at the back of the cross steel plate and is impacted to enter soil by over + / -30 cm, and then carpolite or clay are backfilled at the back for sealing; the concrete is cast in the tank section; the counterforce box is pulled out, then a flushing or shoveling tool corresponding to the cross steel plate in structure is adopted to remove the attachment at the part so as to ensure the water-stopping effect and the joint intensity of the cross steel plate.

The invention relates to the use of distributed optical fibre sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analysing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and / or fluid in the wellbore.

The invention provides a method for conducting multi-state system task reliability modeling on the basis of a performance model. The method includes the following steps of S1, collecting design information of a target multi-state system; S2, building the performance model of the target multi-state system; S3, determining failure criteria of the target multi-state system; S4, conducting analysis and modeling on an failure pattern of the target multi-state system; S5, obtaining information of failures of the target multi-state system; S6, conducting failure injection and simulation on the targetmulti-state system; S7, conducting reliability analysis and evaluation on tasks of the target multi-state system, wherein a task reliability simulation evaluation method of the failure injection based on a time sequence is utilized for calculation to obtain a mean time between critical failures (MTBCF) and mission reliability (MR) of the target multi-state system. By constructing a failure transfer relation among failure mechanisms, key parameters, component performance and the system failure criteria from bottom to top to conduct task reliability analysis and evaluation of the multi-state system, better integrity and accuracy are achieved.

Year 2010 showed us that the oil / gas industry was not prepared to shut down in few days a high pressure oil / gas well. The Gulf of Mexico was polluted by thousands of barrels of oil that were leaking from a high pressure well. The environment damage was humongous as well as the economical loses. Here, I am presenting a method to shut down a high pressure oil / gas well in matter of days rather than in months. This method keeps the well integrity. This method is effective even if the well integrity was compromised.

A loudspeaker driver has a diaphragm connected to a surrounding frame by a roll suspension which extends around the diaphragm and within the frame. The roll suspension connects the outer edge of the diaphragm to the inner edge of the frame and flexes as the diaphragm is displaced to and fro axially relative to the frame. In order to provide for better integrity of the roll suspension during its displacement, and reduce unwanted deformation and concomitant distortion, the suspension roll is provided with pleats extending across the roll suspension transversely to the direction of axial movement of the diaphragm to create a series of undulations (peaks and troughs) around the perimeter of the roll suspension. In transverse cross-section, the roll suspension is parabolic. The roll suspension varies continuously between each peak and adjacent trough. Preferably, outer surfaces of each peak and adjacent trough merge to a common point on the outer edge of the roll, while their inner surfaces merge to a common point on the outer edge of the roll, such that the peaks and troughs effectively disappear.

A system for increasing the detecting degradation of a wellbore. The system comprises a computer memory configured for storing computing instructions and a processor operably coupled to the computer memory. The system comprises a sensor operably coupled to the computer memory and is configured to determine the presence of at least one chemical species indicative of degradation of the wellbore in a fluid exiting the wellbore. Methods of monitoring a wellbore for corrosion or other degradation of one or more components of wellbore equipment are disclosed as are methods of increasing the lifetime of a wellbore.

The invention relates to a curable sealant composition broadly comprising a resealable, swellable, reactive sealant and free radical initiator; said resealable, swellable reactive sealant comprises monofunctional monomer(s), multifunctional monomer(s), reactive polymer such as unsaturated styrenic block copolymer, swellable additive, and optional components. The monofunctional monomer is a vinyl ester derivative of versatic acid with C9-C12 carbon atoms, or monoacrylate, monomethacrylate, monoacrylamide, or monomethacrylamide. The multifunctional monomer are di-, tri-, tetra-, and / or penta-functional monomers with vinyl, acrylate, methacrylate, acrylamide, or methacrylamide functionality, such as tricyclodecane dimethanol diacrylate, trimethylolpropane trimethacrylate, 1,3-butylene glycol dimethacrylate or a mixture thereof. The reactive unsaturated polymer is a styrenic block copolymer such as SBS, SIS, S-I / B-S, I-SEBS-I, and mixtures of two or more of these. The swellable additive is selected from saturated block copolymers such as SEBS, SEPS, SEEPS, and I-SEBS-I, or a mixture of these. Free radical initiators are preferably peroxides, although others are acceptable.

The invention discloses a rocket sled test exterior data fusion method. The rocket sled test exterior data fusion method has high measurement accuracy of a radar system, high positional accuracy of a shadow shield system, and positioning and speed measurement accuracy of a differential GPS system, solves the problem of water brake section data loss, realizes better integrity of exterior data, realizes whole-course data coverage of a rocket sled test, realizes data fusion, realizes time synchronization of the radar system, the shadow shield system and the differential GPS system, and can produce data having the highest accuracy in the section. Compared with the existing error separation or function judgment method adopting a single exterior measurement technology, the rocket sled test exterior data fusion method provides more data points, solves the problem of the existing error separation method adopting the single exterior measurement error separation technology, and realizes more accurate precision analysis. The rocket sled test exterior data fusion method provides basis for higher-order term separation of an inertial measuring unit error model.

The buffer management algorithm of multipriority optimum dynamic threshold value is characterized in that when the lengths of all queues are less than the buffer resources, the threshold value of the quene with priority i is the max. of the sum of queues in each port with priority less than or equal to i, making the threshold of the queue with higher priority larger than the threshold of the queue with lower priority. When lengths of all queues are equal to or longer than the buffer resources, the threshold will be reduced according to the speed of the packet. The invention provides the features of taking full advantage of buffer resources, reducing the loss of the packets, allocating the resources according to the priority. Comparing with the dynamic threshold algorithm in prior art, the invention possesses better integrity.

The invention provides a method for measuring content of ellagic acid ingredients in euscaphis japonica medicinal materials, which synchronously measures the contents of at least two of five ingredients of ellagic acid, 3,3'-dimethoxy ellagic acid, 3,3'-dimethoxy ellagic acid-4'-O-beta-D-xyloside, 3,3'-dimethoxy ellagic acid-4'-O-beta-D-glucoside and 3,3'-dimethoxy ellagic acid-4'-O-alpha-D-arabinoside contained in the euscaphis japonica medicinal materials by using a high efficiency liquid chromatography or an ultra-high efficiency liquid chromatography under the same chromatogram condition. In the invention, the contents of the multiple ingredients in the euscaphis japonica medicinal materials are measured under the same chromatogram condition so that the method for measuring the content of the ellagic acid ingredient in the euscaphis japonica medicinal materials has better integrity, characteristics and stability as well as high precision, favorable repeatability and high recovery rate and capability of effectively controlling the quality of the euscaphis japonica medicinal materials, thereby ensuring the effectiveness and the safety of clinical medication and laying the foundation for redevelopment and application of the euscaphis japonica medicinal materials.

The invention provides an ultra-micro electric car driven by a hub motor. Hub motors which are specially designed are installed on wheels of the electric car and directly drive the electric car to run without gearboxes and transmission devices, and the electric car has high energy efficiency ratio, low noise and no exhaust pollution. The combination of the pole changing of the hub motor and the frequency conversion of a frequency inverter is used in variable-speed control of the electric car, so as to ensure the wider scope of speed regulation for the electric car and better performance in climbing, heavy-load startup and low-speed running. The wheels and a brake disc or a brake drum are arranged at the outer edge of an end cover inside the hub motor or on a ring flange inside a motor casing, so as to ensure the outer end of wheel axles to have lower stress, more reasonable stress distribution, better integrity between the wheels and a brake device and stronger impact resistance. The design of an ultra-micro car body with the door opening at one side and two rows with threes seats or two rows with two seats can ensure simpler structure of the whole car and low manufacturing cost, so that the ultra-micro electric car can replace a motorcycle so as to be used in public transport.

The invention discloses a feed pelletizing device with functions of grinding, screening and mixing raw materials. The feed pelletizing device comprises a base, wherein support plates are fixedly arranged on the left and right sides at the top of the base; a pelletizing bucket and a mixing box are fixedly arranged by virtue of brackets separately between the left support plate and the right supportplate; the pelletizing bucket is obliquely arranged toward the right lower corner; an electric push rod is fixedly arranged on the left wall in the pelletizing bucket; the push rod at the right end of the electric push rod is fixedly connected with an extrusion cylinder; the outer side wall of the extrusion cylinder is fit with the inner side wall of the pelletizing bucket and is in slip connection with the extrusion cylinder and the pelletizing bucket; an electric heating tray is fixedly arranged on the right side in the pelletizing bucket; and a plurality of left and right perforated pelletizing holes are formed uniformly in the electric heating tray. The feed pelletizing device is characterized in that the extrusion cylinder is driven by the electric push rod to extrude raw materials rightwards to enable the raw materials to pass through the pelletizing holes in the electric heating tray, thereby performing pelletizing; and the electric heating tray is electrified and heated duringpelletizing, so the surfaces of feed are gelatinized when the raw materials penetrate through the pelletizing holes, thereby ensuring better integrity of the feed, avoiding loosening and improving feed quality.

The method provides a wind aloft inversion method based on Doppler weather radar data. The method utilizes extrapolation products and radial velocity products of the Doppler weather radar, and air sounding data to carry out a multi-level wind aloft field fusion. The invention utilizes an extrapolation result of a radar echo image to convert an average radial velocity field of each elevation planeinto a velocity vector field with U and V components, thereby improving the readability of a subjective analysis of the wind aloft field. The invention utilizes the air sounding data to appropriatelycorrect a radar wind field, and the strength of the correction decreases with the increase of the distance between a radar grid point and a sounding station, so that the wind field has better integrity and continuity, and is more accord with the condition of an actual atmospheric wind field. Compared with some multi-data fusion methods, the algorithm of the method provided by the invention has moderate computational complexity and can improve the timeliness of the secondary radar wind field output.

A method performed with a computing system for determining well integrity includes receiving a selection of a well configuration of a well comprising one or more casing strings and a production tubing extending from adjacent a wellhead of the well to adjacent a bottom of the well; receiving a selection of a wellbore operation performed with the well configuration; determining, based on the well configuration and the wellbore operation, a characteristic of the well at or adjacent the one or more casing strings and the production tubing during the wellbore operation; modifying the well configuration to remove the production tubing; and determining, based on the modified well configuration and the wellbore operation, the characteristic of the well at or adjacent the one or more casing strings during the wellbore operation.

The invention discloses an ultra-high performance concrete and partial steel beam composite cap beam and a construction method thereof. The composite cap beam comprises a hollow groove-shaped body cast by ultra-high performance concrete and a roof steel beam, wherein the roof steel beam is laid on the hollow groove-shaped body; the height of the roof steel beam is >= 1 / 10 of the total height of the composite cap beam; and a neutral axis of the composite cap beam is positioned near the roof steel beam or inside the roof steel beam. The roof steel beam and the ultra-high performance concrete hollow groove-shaped body of the composite cap beam are integrally formed at one time and are integrally prefabricated in a factory so as to enable the composite cap beam to have better integrity, reduceprocedures performed in a construction site, ensure the manufacturing quality of components, save the amount of steel and achieve good economical efficiency. The construction method of the compositecap beam does not need additional investment of new equipment or new skill training for construction workers. The construction method is simple and quick.

A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The critically damped present acoustic stack utilizes a plurality of stacked acoustic elements such as piezoelectric ceramics that are energized in two manners, providing different center frequencies; each producing a respective center frequency of 100% bandwidth to yield an acoustic stack having a total bandwidth exceeding the bandwidth of an acoustic element or the bandwidth of the plurality of acoustic elements. One manner of energizing is to pulse only one of the acoustic elements. The other manner is to pulse a first acoustic element the pulse a second acoustic element after a delay equal to the amount of time it takes for the first pulse to reach the face of the second acoustic element. The acoustic elements are bonded together and onto a critically damped backing of tungsten. The assembly is retained in a housing that is preferably made of PEEK. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.

The invention discloses a method for extracting ribonucleic acid from blood. The method comprises the steps of adding a rapid cell lysis solution containing a cationic surfactant into whole blood sample, mixing uniformly and standing; carrying out a centrifugal separation after cleaning to remove a supernatant solution and retain precipitate; adding a high-ion-concentration purified ribonucleic acid solution to the precipitate, mixing uniformly and standing; carrying out a centrifugal separation, taking the centrifugally separated solution portion to obtain a ribonucleic acid solution. The method for extracting ribonucleic acid from blood disclosed by the invention is more efficient, rapid and simple and the separation of white blood cells is not carried out firstly. Compared with the prior art, ribonucleic acid with better integrity and higher purity can be obtained by the extraction method and the extraction method is more suitable for experiments, research and analysis on ribonucleic acid and related technologies.

The invention discloses a network state model construction method and a network state evaluation method based on a differential manifold. The invention can make the network security evaluation no longer depend on the traditional topology path, so that the calculation result has better integrity and calculation scalability. The invention abstracts the network system state as a high-dimensional differential manifold, and characterizes the network state in more detail. The network state corresponding to each point in the manifold is presented by all the attributes of each device node in the network system. The network state can be more objectively reflected by evaluating the attribute information of each device node in the network system. The network state can cover all the nodes in the network system and their attribute information, thus ensuring the integrity and comprehensiveness, and the calculation scalability is good. At the same time, the invention does not need to consider the path problem between nodes, and the path explosion problem does not exist.

The invention provides a soil embankment slope protection unit and a slope protection device, and relates to the field of civil engineering protection structures. The soil embankment slope protectionunit comprises a water collecting platform and at least two drainage mechanisms arranged side by side, wherein the water collecting platform is arranged at the tops of the drainage mechanisms; the bottoms of the drainage mechanisms communicate with a drainage ditch; and a plurality of buffer steps are arranged at the ends, close to the drainage ditch, of the drainage mechanisms. According to the soil embankment slope protection unit, when the rainfall is relatively large, rainwater on an embankment is collected through the water collecting platform, is discharged to the drainage ditch throughthe drainage mechanisms, and is prevented from flushing a slope, and stability of the embankment is strengthened; and soil retaining strips and pull rods are further arranged, a soil body and plants of the slope are more stable, and the embankment itself can be reinforced. The slope protection device comprises the plurality of soil embankment slope protection units, the slopes on the entire routehave better integrity and stability, maintenance cost is reduced, and utilization efficiency of a road is improved.

The invention discloses a discontinuous shielding adhesive tape for a data communication cable and a manufacturing method of the discontinuous shielding adhesive tape. The shielding adhesive tape comprises a first tape layer; a metal layer is mounted on the top of the first tape layer; the width of the metal layer is smaller than the width of the first tape layer; a plurality of nicks are equallyspaced at the top of the metal layer; the metal layer is divided into a plurality of independent metal elements by the plurality of nicks; portions of one side of the first tape layer, which extend out from a corresponding side of the metal layer, are set to be blank regions; and the bottom portion of the metal layer and the top portion of the first tape layer are filled with glue; the length of the metal layer is equal to the length of the first tape layer; and the blank regions of the first tape layer are used to prevent the short circuiting of the metal layer. The discontinuous shielding adhesive tape of the invention is economical and practical. Nicks will not appear in the blank regions of the first tape layer when the metal layer is nicked, and therefore, the shielding adhesive tapewill not be fractured during a stretching process, and the shielding adhesive tape has better integrity.