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WO/1989/006737 |
A tool is intended for use in an oil or gas well to retrieve a drilling or production string from the well, particularly in a situation where the casing or formation has collapsed, thus gripping the drilling or production string. The too...
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WO/1984/000577 |
A bidirectional hydraulic drilling jar (12) includes an elongated mandrel (42) telescopingly disposed within a body (22) and defining spaced apart fluid chamber (62, 66) separated by a restricted bore portion (64) of the body. The mandre...
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WO/1983/002641 |
An oil well packer retriever has a packer miller (6) which has a series of fin-like blades radiating from a central tube string (2). The blades are faced with tungsten carbide and in use these mill away the packer allowing it to drop und...
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WO/1982/002736 |
A pulling tool (29) for retrieving well tools (90) from a well bore. The present invention allows the reach of the pulling tool (29) to be easily varied. The pulling tool (29) can also be assembled for emergency release by either upward ...
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WO/1982/001569 |
A well jar (11) having an elongated body (14) with an axial passageway (15) and threaded connections (12, 13) for assembly into a string of well pipe. The body has a tubular mandrel (16) slideably mounted within a tubular barrel (17) wit...
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WO/1982/001213 |
A fishing tool (10) to snag and to retrieve cables from wells. The tool includes an elongated body (11) which has two ends (13 and 14), a substantial length, and peripheral boundary of lesser lateral dimensions than a well down which the...
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JP2011062585 |
To provide a cleaning method of a deep well pipe, in which a part of a strainer provided in the deep well pipe for taking in groundwater damaged or broken.A casing pipe 2 thinner than the deep well pipe 1 by one size is inserted into the...
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JP2010284605 |
To provide an apparatus and a method for preparing and injecting an emulsion which enables preparing and injecting an emulsion stably for a long period in injecting an emulsion of fine particles of liquid carbon dioxide and water into ga...
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JP2010221137 |
To provide a system for preventing the clogging of a well by applying a magnetic field to flowing water to bring a scale-causing substance to a state being unable to precipitate.The system for preventing the clogging of the well by apply...
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JP2009018214 |
To provide an apparatus for cleaning the inside of a deep well pipe equipped with a net basket for storing dirt washed off from the pipe, which apparatus attached to the tip of a super high pressure water hose is lowered down together wi...
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JP2007162262 |
To provide a takeout tool for easily taking out a core pole from the inside of a core tube.The takeout tool 1 used in boring a hole in a bored object such as a concrete structure by a core boring device and taking out the core pole 22 re...
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JP3955994 |
To provide a cleaning method by which sludge and other foreign matter stuck to the inside of a pipe for drawing water from a deep well can easily be removed efficiently. The stuck sludge and other foreign matter are removed by connecting...
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JP2006169867 |
To provide a well screen capable of utilizing a large part of an amount of suction as soon as possible by a partial surging block for the suction of water from an aquifer by making the thickness of the screen thin and early destroying a ...
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JP2005226277 |
To provide equipment for pulling up slime etc. accumulated on the bottom of a well, which enables even the hardened slime to be pulled up in an efficiently crushed manner.A jet nozzle 2 is provided at the tip of a high-pressure pipe 4 fo...
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JP2005058975 |
To enable number of rotation of a rotary head to be freely set correspondingly to a using state and to realize injection of high pressure water from two directions, that is from a perpendicular direction and an oblique direction, which a...
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JP2004027502 |
To provide a method and a device for releasing the retention of a hole holding pipe capable of surely releasing the retention without requiring a large energy even if a retention depth is deep or the degree of retention is large.This dev...
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JP3442457 |
PURPOSE: To make it possible to pull up an damaged casing pipe. CONSTITUTION: Six wedge-like ribs 5, 5,... are fixed to the circumference of a pushing section 2 extended outward of the direction of the axis in the front end of a tube 1. ...
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JP2002192094 |
To provide a cleaning method by which sludge and other foreign matter stuck to the inside of a pipe for drawing water from a deep well can easily be removed efficiently.The stuck sludge and other foreign matter are removed by connecting ...
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JP10325289 |
To provide a control method of a working module such as a hydraulic grab and a device which excavates a hole and removes obstacles from the hole extremely effectively (effective as hardware, time, and cost) and carry out a plurality of w...
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JP09060468 |
To efficiently conduct the finishing work of a well by arranging a removable packer and a heavy bob section approximate to the inner diameter of the screen of a well on the outer periphery of a tube body, and communicating a cavity with ...
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JP07252987 |
PURPOSE: To make it possible to hold a member in an underground hole to pull out. CONSTITUTION: A tube 2 is fitted backward of the circumference of a cylindrical outside pipe 1 and is fixed. A rod 3 fixing a piston 9 to the rear end is f...
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JP07252988 |
PURPOSE: To make it possible to pull up an damaged casing pipe. CONSTITUTION: Six wedge-like ribs 5, 5,... are fixed to the circumference of a pushing section 2 extended outward of the direction of the axis in the front end of a tube 1. ...
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JP07108103 |
PURPOSE: To improve the dissolving power and dissolving rate when an asphaltene residue present in an oil well is to be dissolved by preparing a hydrocarbon blend having a compsn. selected from a specified region in a ternary chart of sa...
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JP06093787 |
PURPOSE: To position a rock drilling device close at hand during drilling, and to automatically operate the device when a backhammer is required. CONSTITUTION: The rock drilling device comprises a backhammer unit 10 in which a hammer pis...
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JP05079264 |
PURPOSE: To separately control increase in the diameter of an excavated fluid hole extending through a jar and both upward and downward jarring actions. CONSTITUTION: A double-acting hydraulic drilling jar 1 includes a mandrel 2 arranged...
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JP04350287 |
PURPOSE: To immediately pull up and recover a drilling rod which is broken in a drilled hole, eliminate the trouble of the longitudinal rupture of a belt for transporting rocks and stones due to the mixing of the broken rod into the rock...
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JP03055388 |
PURPOSE: To recover an implement on a hole lower part by comprising a head capable of screwing, a main body radially extended to be communicated with a pressure pipe, a block comprising a rotatable sleeve to the main body and an air inta...
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JP02285194 |
PURPOSE: To protect a riser hole by operating a hook ring held on an outer sleeve with an upper split ring lowering together with a casing and disposing it so as to engage with a corresponding form part on a wear bushing. CONSTITUTION: A...
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JP02197692 |
PURPOSE: To remarkably improve the safety, and to lower the cost while preventing the waste of time by maintaining the non-explosion condition till a power unit is made fale and a conductive contact is generated, and sealing a contact of...
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JP01280197 |
PURPOSE: To promote the jar action by arranging a compression chamber between an outside housing and a mandrel, sealing and compressing fluid, arranging an atmospheric pressure chamber, and isolating a compressed fluid form a well fluid....
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