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

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 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 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.