46results about How to "High blocking success rate" patented technology

The invention relates to a method for realizing temporary plugging redirecting multiple crack fracturing inside a horizontal well section. The method comprises the following steps: firstly preparing a temporary plugging redirecting working liquid which includes a degradable temporary plugging agent, degradable fibers, and a low-viscosity transport liquid; conducting sectional fracturing, and conducting pump casting in an order of a preset liquid-a sand carrying fluid-the temporary redirecting working liquid; and after the completion of the entire fracturing, waiting for the temporary redirecting working liquid to degrade, and discharging the temporary redirecting working liquid. According to the method, plugging efficiency is increased through the adoption of the multiple dimension degradable temporary plugging agent, leakage loss among inter-crack liquid is reduced, and plugging success rate is increased. After construction, the degradable temporary plugging agent, and the degradable fibers are completely degraded under well bottom temperature, leave no residue and produce no pollution to artificial cracks. The method of the invention is conducive to rapid plugging of cracks, increases success rate of temporary plugging redirecting fracturing, reduces construction cost, and increase oil and gas reservoir recovery efficiency.

The invention discloses a method for blocking a severely polluted deep well sandstone reservoir and belongs to the technical field of oil field blocking. For the severely polluted deep well sandstone reservoir to be blocked, pollution of the immediate wellbore vicinity of the sandstone reservoir is removed firstly; then cement squeezing blocking is carried out on the well section with pollution removed through a packer cement squeezing method; the pollution of the immediate wellbore vicinity of the sandstone reservoir is removed through small acidification; high energy composite perforation is carried out on the sandstone reservoir, and the pollution of the immediate wellbore vicinity of the sandstone reservoir is removed. The method breaks through a conventional blocking thought, pollution of the sandstone reservoir to be blocked is removed firstly, permeability of the reservoir is improved, and then the reservoir is blocked. The blocking success rate is improved, and the period of blocking validity is prolonged. A reference is provided for similar well blocking construction in future.

The invention provides a petroleum recovering embrasure plugging agent, mixed of five materials in percent: cinder (particle size less than 2 mm) 7%-11%, powder coal ashes 36%-44%, calcium-based colloidal clay 16%-22%, wood powder (particle size less than 0.5 mm) 1%-5% and thermosetting Arcolite 18%-20%. It has high strength, adjustable curing time, specific flexibility, good combinability with stratum rocks, low density, ability to fully plug the whole embrasure, good water, oil, acid, alkali and temperature resistance, etc.

The invention relates to the technical field of civil engineering, in particular to a method and a device for quick blockage of piping in a deep foundation pit. The method includes: sending geotextile bags to an impervious layer of a foundation through a piping path, grouting cement paste into the geotextile bags through a grouting pump, enabling the geotextile bags to expand to form a plug effect so as to block the piping path, and completing piping blockage after solidification of the cement paste. Compared with a traditional blockage method, the method has the advantages that erection of complex operation equipment is avoided, high blockage success rate, low cost and simplicity and convenience in blockage operation are achieved, the blockage process is low in time consumption, and accordingly construction period can be shortened; in addition, high safety and reliability can be realized after blockage is completed, and piping is less prone to recurrence.

The invention provides a gas insulated metal-enclosed switchgear leakage local diversion blocking method. The method is characterized by, for a housing having a cylindrical turning geometrical characteristic, designing a special clamp; fixing the clamp onto the housing through an adhesive; blocking an air outlet through a bolt; and finally, blocking the air outlet position through the adhesive. The invention also provides a local blocking clamp size design calculating method. Compared with a conventional method of coating high-strength glue on the whole housing, the method greatly reduces construction cost, is short in construction period, has little effect on equipment body and is high in blocking success rate.

The invention discloses a high-strength selective water-plugging profile-modifying agent for low-permeability reservoir and a preparation method thereof. The preparation method comprises dissolving cyclodextrin, polyvinyl alcohol, formaldehyde and acrylamide in water to form a zero-viscosity aqueous solution, then adding ammonium sulfate, injecting into underground, performing polymerization reaction under effect of stratum temperature, so as to form a high-strength white blocking substance. The prepared high-strength selective water-plugging profile-modifying agent for low-permeability reservoir possesses the characteristics of good injection property, efficient selectivity, controllable curing time and the like, is resistant to acid and alkali corrosion, and possesses long-term stability.

The invention relates to a barrier gate. The barrier gate comprises a gate machine (1), a road rod (2) and a driving device arranged in the gate machine (1), wherein one end of the road rod (2) is connected with the driving end of the driving device; both the vehicle surface and the lower side of the road rod (2) are provided with sensors (3); a starting switch (4) is arranged on the gate machine above the road rod (2); an electric signal output system (6) is arranged in the gate machine (6); the input ends of the sensors (3) are electrically connected with the starting switch (4), and the output ends of the sensors (3) are electrically connected with the electric signal output system (6); when the road rod (2) is located at the horizontal position, the road rod completely contacts with the contact of the starting switch, and the contact of the starting switch is located at off-state; when the road rod is lifted, the road rod is completely separated from the contact of the starting switch, and the contact of the starting switch is located at an on-state. The barrier gate can output a vehicle intruding signal automatically and can transmit the signal to stopping equipment at back end, so as to effectively stop forcibly intruding vehicles.

An energy-gathered bundle type nesting plugging and wall reinforcing device and an application thereof in karst cave plugging. The energy-gathered bundle type nesting plugging and wall reinforcing device comprises an external slotted metal pipe (1) and an internal nesting blasting tool, wherein the slotted metal pipe (1) has spiral slits (2) or straight slits (3) cut on a pipe wall thereof; the nesting blasting tool is a mandrel (5) having a surface provided with a plurality of explosive grooves (4) in which explosives are placed; the slotted metal pipe (1) is disposed to sleeve the mandrel (5) and fixed, with a movable fit therebetween. The present invention can solve the difficulty that the plugging material cannot easily reside to form a bridge, and effectively improving the plugging success rate.

The invention discloses a vertical post-cast strip plugging measure. The vertical post-cast strip plugging measure comprises a wall body, wherein split bolts are symmetrically arranged in the wall body in a penetrating mode; fixing blocks are symmetrically arranged in the split bolts in a sleeved mode; the fixing blocks are integrally formed and symmetrically connected to the two ends of a connecting rod; extrusion plates are integrally formed on and symmetrically connected to the connecting rod; grooves are formed in the extrusion plates; sliding grooves are formed in the bottom end surfacesof the grooves at equal intervals; sliding blocks are arranged in the sliding grooves in a sliding connection mode; a first extrusion spring is integrally formed on and connected with one end of eachsliding block, and the other one of each first extrusion spring is integrally formed on one side of the corresponding extrusion block. According to the vertical post-cast strip plugging measure, whenpost-cast strip plugging is carried out, the wall body can be well fixed and supported, the supporting and fixing stability is improved, the post-cast strip plugging work can be carried out conveniently, the plugging success rate is improved, the construction quality is guaranteed, and the appearance quality of a concrete wall is improved.

The invention relates to the technical field of petroleum drilling, and discloses a reservoir protection agent intermediate product, a reservoir protection agent, preparation methods and applications thereof, as well as drilling fluid and an application thereof. The reservoir protection agent intermediate product is prepared by the following raw materials: acrylamide, a cationic monomer, a cross-linking agent, an initiator, a toughening material and water, based on 100 parts by weight of the raw materials, the raw materials comprise the following components in parts by weight: 8-30 parts of acrylamide, 1-10 parts of the cationic monomer, 0.01-0.5 parts of the cross-linking agent, 0.01-0.1 parts of the initiator, and 5-25 parts of the toughening material. The reservoir protection agent comprises the intermediate product, alkali, salt and water, based on 100 parts by weight of the reservoir protection agent, the reservoir protection agent comprises 5-40 parts by weight of the intermediate product, 1-10 parts of alkali, and 1-12 parts by weight of salt. The reservoir protection agent has good sealing effects, improves reservoir protection capability of drilling fluid, and enhances capability of drilling fluid for stabilization of borehole walls.

The invention belongs to the technical field of fuel gas pipeline plugging, and more specifically relates to a plugging device and plugging equipment. The plugging device comprises a supporting cylinder, a sliding block screw rod and a sliding block are arranged in the supporting cylinder, the lower end of the sliding block can penetrate out of the supporting cylinder, the penetrating part is provided with a straight plane and a slope, the lower end of the supporting cylinder is connected with a plugging head through a pin shaft, and a rear cone plate sliding block, a rear cone plate, a rubberring, a front cone plate and a guide plate are arranged in the plugging head. According to the plugging device, the sliding block screw rod is driven so that the front cone plate and the rear cone plate can be used to extrude the rubber ring so as to complete plugging; and meanwhile, the plugging device can realize 90-degree steering in a pipeline through the guide plate. The invention further provides plugging equipment comprising the plugging device. The plugging equipment further comprises an inner rod used for driving the sliding block screw rod to rotate and a double-outlet-rod oil cylinder for driving the plugging head to move up and down and steer. The plugging equipment is long in service life, good in plugging effect and better in pipeline integrity keeping.

The invention discloses a plugging method for a large-scale crack of a fractured reservoir, and belongs to the field of oilfield exploitation. Comprising the following steps: preparing gel particle aqueous solution; injecting a plurality of gel particle aqueous solutions into the simulated large-scale crack, and selecting the adaptive particle size of the gel particles; preparing gel particles meeting the adaptive particle size into gel particle aqueous solutions with different concentrations, injecting the gel particle aqueous solutions into the simulated large-scale crack at different injection speeds and by always keeping the mass flow rate as a fixed value, and selecting an adaptive concentration and an adaptive injection speed; injecting a gel particle aqueous solution meeting adaptive particle size and adaptive concentration into the actual large-scale crack at an adaptive injection speed to obtain a gel particle medium channel; calculating the permeability of the gel particle medium channel; selecting an adaptive polymer body gel system matched with the gel particle medium channel; and injecting the adaptive polymer body gel system into the gel particle medium channel. By means of the method, it can be ensured that the whole large-scale crack channel is evenly and compactly blocked.

The invention discloses a combined channel control method based on evaluation and optimum selection. The method comprises the following steps that 1) channels to be controlled of a wireless network in an area to be controlled are selected; 2) a control system scans the wireless network environment of the area to be controlled to obtain the number of control points and a distance between the control system and each control point in each channel to be controlled; 3) the control system computes a percentage mean value U1 of a difference between the distance between each control point in each channel to be controlled and the control system and a reference distance dS relative to the ds; the control system computes a percentage mean value U2 of a difference between the total number of the control points in each channel to be controlled and a reference control number Q relative to the Q; and 4) the control system obtains a judging threshold U according to a weighted average of the U1 and the U2; if U is greater than 1, the control system adopts a channel occupation method to control the channels to be controlled; if U is not greater than 1, the control system adopts a deauthentication or disassociation method to control the channels to be controlled. The combined channel control method has the advantages of precise control and small electromagnetic environmental pollution.

The invention discloses a pipeline plug feeding mechanism which particularly comprises a plug combiner, a main supporting cylinder, a blind flange, a feeding hydraulic cylinder and a rotating hydraulic cylinder. The plug combiner is a hollow cylinder with two open ends, a lower flange is arranged at the lower end of the plug combiner, the blind flange is fixed at the upper end of the plug combiner, the main supporting cylinder is positioned inside the plug combiner, a cylinder barrel of the feeding hydraulic cylinder is fixedly connected with the blind flange, a cylinder rod of the feeding hydraulic cylinder penetrates the blind flange and is fixedly connected with the upper end of the main supporting cylinder, the rotating hydraulic cylinder is positioned inside the main supporting cylinder, a cylinder barrel of the rotating hydraulic cylinder is connected with the main supporting cylinder through a first pin, and a pipeline plug is connected with a cylinder rod of the rotating hydraulic cylinder through a second pin and connected with the lower end of the main supporting cylinder through a third pin. The feeding mechanism can actively lift the pipeline plug up and down and turn the pipeline plug, and a pipeline is accurately, rapidly and safely plugged.