Blowout preventer for steel wire and cable
A blowout preventer and cable technology, which can be used in wellbore/well components, earth-moving drilling, sealing/packing, etc., and can solve the problems of uncertain packing deformation and shape.
Active Publication Date: 2016-09-28
LUZHOU JUYUAN GASOLINEEUM TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a blowout preventer suitable for steel wires and cables, which shrinks the inner hole of the sealing packing by extrusion to realize sealing, and solves the problem of the existing packing deformation and shape being indeterminate
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[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0022] combine Figure 1-2 As shown, the blowout preventer suitable for steel wires and cables in this embodiment includes a head body 1 , a pup joint 2 , a pressure column 3 , a sealing packing storage pad 4 and a sealing packing 5 . The head body 1 is connected with the short joint 2 through threads. A through hole is opened in the middle of the head body 1, and the pressure column 3, the sealing packing storage pad 4 and the sealing packing 5 are all located in the through hole. The l...
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The invention provides a blowout preventer for a steel wire and a cable. The blowout preventer comprises a head body and a short section and further comprises a pressure pillar, a seal packing preservation mat and seal packing. The lower end of the pressure pillar is connected with the top of the seal packing preservation mat, the periphery of the seal packing preservation mat is provided with a squeezing strip, the seal packing is arranged below the seal packing preservation mat, the squeezing strip is located on the outer periphery of the seal packing, the pressure pillar, the seal packing preservation mat and the seal packing are provided with inner holes respectively, when the pressure pillar is pressed downwards, the squeezing strip squeezes the seal packing, and the hole diameter of the inner hole of the seal packing is reduced. When the blowout preventer needs to be sealed, the pressure pillar is controlled to move downwards, and the pressure pillar squeezes the seal packing preservation mat so that the seal packing preservation mat can also move downwards. The squeezing strip moves downwards along the outer periphery of the seal packing, the seal packing is squeezed towards the middle in a concentrated mode, and the hole diameter of the inner hole is reduced.
Description
technical field [0001] The invention belongs to the technical field of oilfield gas recovery, in particular to a blowout preventer suitable for steel wires and cables. Background technique [0002] With the continuous development of oil fields, blowout accidents often occur during downhole cable testing operations, such as cable conveying perforation, cable bottom test, etc. When the pressure of oil and gas in the well is high, the blowout preventer can close the wellhead to suppress the injection of high-pressure oil and gas. Existing blowout preventers mostly use rectangular packings surrounding steel wires or cables in the box, and the packings are unidirectionally squeezed and deformed by oil cylinders or other devices to achieve sealing. However, in the above technical solution, the deformation of the packing is difficult to control, and the sealing effect is not good. Moreover, downhole dirt is easily brought into the spray box, which can easily damage the packing an...
Claims
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IPC IPC(8): E21B33/06E21B29/04
CPCE21B29/04E21B33/06
Inventor 邓琳灿汪航邓智汪文清乔未李帝辉何畅
Owner LUZHOU JUYUAN GASOLINEEUM TECH