40results about How to "Convenient downhole operation" patented technology

The invention discloses a hydraulic expandable liner hanger provided with a double-safety releasing gadget. The hydraulic expandable liner hanger comprises an expansion base tube, an expansion cone and two hydraulic cylinders, wherein the expansion base tube, the expansion cone and the hydraulic cylinders are mounted on an inner tubing string in a sleeving manner sequentially; a ball socket and a ball assembly re arranged in the top end of the expansion cone, and the upper end of a ball is connected with the lower end of one hydraulic cylinder; a liquid injection hole is formed in the top surface of the hydraulic cylinder at the upper end; the upper end of the inner tubing string is connected with an upper adaptor connector; the lower end of the expansion base tube is connected with a releasing coupling; a collet is mounted in the releasing coupling in a sleeving manner, a releasing body is connected into the upper part of the collet, and the lower end of the inner tubing string is connected into the upper part of the releasing body; an outer slide bushing and an inner slide bushing are mounted inside and outside the inner tubing string respectively in a matched and sleeving manner; a pressure relief hole is formed in one side wall of each of the inner slide bushing, the outer slide bushing and the inner tubing string; a conical pin seat is connected into the lower end of the releasing body; a core tube is arranged in the conical pin seat and the releasing body in a matched manner, the upper end of the core tube is propped against the lower end of the inner slide bushing, and the lower part of the core tube is integrally connected with the conical pin seat through a shear pin; a thrust disc is arranged in the lower end of the collet and connected with the lower end of the core tube.

A unified LED cap-lamp is featured as applying large-power high brightness LED and high density battery set then unifying lamp head and battery case to be an integral unit for eliminating off lamp connection wire existed on traditional miner light.

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 a high energy concentration electric pulse plug removal device. The high energy concentration electric pulse plug removal device comprises an electrode device, a filter sectionand a pulse power supply body; the electrode device comprises an electrode body, a control valve, a first sealing ring, a second sealing ring, a positive electrode and a negative electrode, wherein the control valve, the first sealing ring, the second sealing ring, the positive electrode and the negative electrode are arranged on the electrode body correspondingly; the positive electrode and thenegative electrode are disposed opposite to each other up and down in the electrode body, the first sealing ring and the second sealing ring are correspondingly disposed on the upper side and the lower side of the electrode body, the electrode body is internally provided with a communication hole, the control valve is connected to the communication hole through a short tube, and the first sealingring and the second sealing ring are hollow sealing rings and separately communicate with the communication hole; the positive electrode is connected to the pulse power supply body; and an insulatingring is arranged outside the positive electrode, the filter section is connected to the insulating ring in a sleeved mode, and the filter section is separately connected to the power supply body and the electrode device. The high energy concentration electric pulse plug removal device has a high energy utilization rate, good sealing performance, a compact structure and convenient operation, and isapplicable to the fields of oil well plug removal and production increase and mining of coalbed methane and shale gas.

The invention discloses a safety hat, in particular to a safety hat for mining use, and belongs to the technical field of operational safety protects. The safety hat comprises a body; an LED lamp for lighting use is fixed to the front end of the body. The safety hat is characterized in that a hazardous gas detecting module, a wireless communication module, a circuit controller, a data acquiring module and a battery are arranged on the outside of the body; the top of the body is provided with a sound-light alarm; the LED lamp, a sound-operated alarm, the hazardous gas detecting module and the wireless communication module are connected with the circuit controller; the circuit controller is connected with the battery; the data acquiring module, the hazardous gas detecting module, the wireless communication module and the sound-light alarm are connected in order. The safety hat uses the hazardous gas detecting module, the wireless communication module and the data acquiring module to transmit information data in real time, production safety is enhanced, and safety accidents and casualties are reduced.

The invention relates to the technical field of downhole measurement, in particular to a nuclear magnetic resonance logger curing probe. The nuclear magnetic resonance logger curing probe comprises a probe body used for measurement and a permeability shell, the permeability shell wraps the probe body, and the portion between the permeability shell and the probe body is gapless. Relatively speaking, the nuclear magnetic resonance logger curing probe has the downhole high-pressure resistance. In addition, a pressure compensation structure does not exist, oil filling and oil supplying operations are not needed in the well descending process every time, and therefore the well descending operation is easier and more convenient to conduct, and the dangers of pressing explosion do not exist.

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 provides an energy accumulator used for downhole operation. The energy accumulator comprises a body. The body is provided with an energy storage cavity used for storing driving fluid, an inlet and an outlet which are used for enabling the driving fluid to get in and out of the energy storage cavity, and a passageway used for enabling underground fluid to flow. According to the energy accumulator used for downhole operation, the driving fluid provides power for downhole tools and can be recycled; when the energy accumulator is placed in a well, well bodies located at the two ends of the energy accumulator can be kept unblocked, and hence downhole operation is conveniently conducted; and the energy accumulator is simple in structure, convenient to use and savable in time and effort.

The invention relates to a rubber cartridge for a packer and a packer. The rubber sleeve used for the packer includes an elastic cylinder body, a rigid support member wrapped on the circumferential side wall of the cylinder body, and the support member makes the cylinder body form a plurality of spaced expansion regions, wherein, along the cylinder body By axially applying pressure to the end of the barrel, the multiple expansion zones are capable of expanding radially outward independently of each other. A packer includes a rubber cartridge for the packer. The rubber cartridge of the invention is suitable for operations such as drilling and completion of wells, has a simple structure, is applicable to a wide range of well diameters, and can significantly improve the safety and sealing reliability of tools.

The invention relates to water supply and drainage facilities, in particular to a more convenient plastic offset inspection well. The offset inspection well includes the upper part as the inspection wellhead, and the lower part as a tubular seat for connecting with the drainage pipe; the inspection wellhead is vertically upward, the seat is arranged horizontally, and the inspection wellhead is located on the axial side of the seat; The two ends of the seat body and the middle part of the seat body are perpendicular to the inspection wellhead, at least two places are provided with pipe sockets connected to the drainage pipe; the inspection wellhead is extended downwards and a shell is provided, and the shell and the seat body form an intersecting combination , the lower end of the housing is smoothly connected with the seat body; the vertical section of the inner wall of the housing is provided with a ladder; the inner wall of the housing below the ladder is provided with a protruding stepping platform. The structure of the invention is simple, firm, easy to process, assemble and use, high in strength, durable, corrosion-resistant and low in cost.

The invention discloses a steel wire scraper for downhole casings. The steel wire scraper comprises a barrel, scraper brushes and centralizing pipes. A plurality of rows of through hole groups are formed in the side walls of the barrel at intervals, the rows of through hole groups comprise different quantities of through holes which are uniformly formed along circumferential directions, and the through holes are formed in the outer walls of the barrel in a staggered manner at intervals; each cylindrical centralizing pipe is fixedly inserted in the corresponding through hole; the scraper brushes are steel wire rope heads, a plurality of steel wires are twisted to form each steel wire rope head, the quantity of the scraper brushes is identical to that of the centralizing pipes, and each scraper brush is locally fixedly inserted in the corresponding centralizing pipe. The steel wire scraper for the downhole casings can be dragged and turned up and down in the casings along drill rods, and casing walls can be cleaned while the inner walls of the casings are scraped. Compared with the traditional scale scraping devices, the steel wire scraper has the advantages that the steel wire scraper is simple in structure, easy to machine and high in operation efficiency; casing scale with different thicknesses can be thoroughly cleaned in single stroke, damage to the inner walls of the casings can be prevented, the operation cost and operation risks can be reduced to a great extent, the steel wire scraper is favorable for follow-up downhole operation, and the like.

The invention relates to a hydraulic closing tool used for closing a sliding sleeve switch and a sliding sleeve switch tool assembly, the hydraulic closing tool comprises a tool body, a pressing center hole, a lifting and hanging lock tongue and an inwards-shrinking elastic piece, and further comprises a positioning boss and an outwards-extending elastic piece, the positioning boss has the set up-down width size, the upper and lower groove width of the annular positioning groove in the multiple sliding sleeve switches is gradually increased from top to bottom corresponding to an underground pipe column with the multiple sliding sleeve switches, and in the process that the tool main body drives the positioning boss to move downwards, and when the positioning boss extends outwards to be matched with the annular positioning groove in the corresponding sliding sleeve switch in a positioning and inserting mode, the hydraulic closing tool is lowered in place. The positioning boss is controlled by the outward-extending elastic piece to act, the lifting and hanging lock tongue is controlled by fluid pressure and the inward-retracting elastic piece, the lifting and hanging lock tongue and the inward-retracting elastic piece do not interfere with each other, manufacturing cost can be effectively reduced, and reliable action is guaranteed.

The invention relates to a three-layer tubing string dispensing device, which comprises an outer layer pipe string, an intermediate layer pipe string and an inner layer pipe string; one end of the outer layer pipe string is provided with an outer layer connecting assembly, and One end of the pipe string is provided with an intermediate layer connection assembly, and one end of the inner layer pipe string is provided with an inner layer connection assembly; the other end of the outer layer pipe string is connected to the outer layer water injection pipe through the outer layer reducing joint, and the middle layer The other end of the layer pipe string is connected to the middle layer water injection pipe through the intermediate layer reducing joint, and the other end of the inner layer pipe string is connected to the inner layer water injection pipe through the inner layer reducing joint. The oil layer of the three-layer oil well can be injected separately at the same time, and the water injection efficiency of the oil well can be improved. The overall structure is simple, easy to manufacture and install, and has strong practicability.

The invention belongs to the field of oilfield downhole working tools, and particularly relates to an oilfield downhole depth measurement method. The oilfield downhole depth measurement method refersto an upper joint, a piston sleeve, a piston, a central pipe, a spring protection sleeve, a spring, a lower joint and a sealing ball. The upper joint and the lower joint are connected to the upper andlower ends of the central pipe through threads correspondingly; the upper end of the piston sleeve is connected to the outer side of the upper joint through a thread; the piston is arranged in an annular space between the piston sleeve and the central pipe; a liquid passing hole is formed in the position, corresponding to the piston, on the central pipe; after pressure is pumped into the centralpipe, high pressure liquid enters a sealed space in the upper side of the piston through the liquid passing hole, and then the piston is pushed to move; and an elastic hanging claw is arranged on thelower portion of the piston sleeve, and a bulge is arranged on the outer side of the lower end of the elastic hanging claw. The precise depth of related downhole tools is measured by looking for a casing hoop, and the characteristics of simple structure and convenient use are achieved.