Double-wedge-disc blowout prevention device with high practicability
A blowout preventer and practical technology, applied in wellbore/well components, earthwork drilling, sealing/packing, etc., can solve problems such as ram closing operation, economic loss, etc., to achieve convenient sealing and strong practicability , good effect of anti-spray effect
Inactive Publication Date: 2014-05-21
CHENGDU DAMO PETROLEUM MACHINERY GRP
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Problems solved by technology
The existing blowout prevention device can use the change of downhole pressure when there is oil pipe in the well, and close the ram when there is a sign of blowout, but for some cases where there is no oil pipe in the well and the downhole pressure changes, the ram cannot be closed. Shut down operations to avoid the occurrence of blowouts, causing greater economic losses
Method used
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[0018] Such as figure 1 As shown, the present invention includes a main body 1, a side door 4, an upper flange 2 connected to the upper surface of the main body 1, a lower flange 3 connected to the lower surface of the main body 1, a half-sealed ram sealing rubber core assembly, and a fully-sealed ram The sealing rubber core assembly and the ram shaft seal 7, the sealing steel ring groove 9 is also arranged between the fully sealed ram 12 and the lower flange 3, the semi-sealed ram sealing rubber core assembly and the fully sealed ram sealant The core assemblies are of equal length and are all parallel to the horizontal plane. The body 1 of this embodiment is equipped with two layers of sealing rams, the upper layer is a semi-sealed ram sealing rubber core assembly, the lower layer is a fully-sealed ram sealing rubber core assembly, and the ram shaft seal 7 is arranged on the semi-sealed ram The side door 4 is installed on the side of the main body 1 between the sealing rubbe...
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The invention discloses a double-wedge-disc blowout prevention device with high practicability. The double-wedge-disc blowout prevention device with high practicability comprises a body, a side door, an upper flange, a lower flange, a semi-sealing wedge disc sealing rubber core assembly, a full-sealing wedge disc sealing rubber core assembly and a wedge disc shaft sealing element, wherein the upper flange is connected with the upper surface of the body, the lower flange is connected with the lower surface of the body, the body is provided with two sealing wedge discs, the semi-sealing wedge disc sealing rubber core assembly serves as the sealing wedge disc on the upper layer, the full-sealing wedge disc sealing rubber core assembly serves as the sealing wedge disc on the lower layer, the wedge disc shaft sealing element is arranged between the semi-sealing wedge disc sealing rubber core assembly and the full-sealing wedge disc sealing rubber core assembly, and the side door is installed on the side face of the body. According to the structure, the body is divided into the two layers, one wedge disc can be closed on the situation that an oil pipe exists in a well, the other wedge disc can be closed on the situation that no oil pipes exist in the well, different situations can be handled differently, the blowout prevention effect is better, and the application range is broadened.
Description
technical field [0001] The invention relates to the field of petroleum machinery, in particular to a highly practical double ram blowout preventer. Background technique [0002] In the process of drilling and repairing wells in oil fields, well kicks and blowout accidents occur frequently, and blowout preventers must be used to seal the wellhead to ensure the safety of operators and equipment. With the development of oil drilling technology, there are more and more deep wells and ultra-deep wells, and the proportion of oil wells with composite strings has increased significantly, that is, the upper part uses larger diameter tubing, and the lower part uses small diameter tubing, such as single ram blowout prevention In case of blowout, the rams need to be replaced on site to meet the sealing requirements of different pipe diameters, but it is difficult to replace the rams on site. Once a blowout occurs, the rams cannot be replaced in time, which will easily cause safety hazar...
Claims
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Inventor 贺昶明
Owner CHENGDU DAMO PETROLEUM MACHINERY GRP