Hydraulic high-temperature pumping well sealing machine and application method thereof

Abstract

The invention discloses a hydraulic high-temperature pumping well sealing machine and an application method thereof, and belongs to the technical field of oil field and oil well safety. Packing box handle fixing grooves are formed in two sides of a spray preventing cover; a fixed table shoulder is arranged at the lower part of the spray preventing cover; through holes are formed in the packing box handle fixing grooves; dowel pins can be inserted into the through holes; a through hole is formed in the upper part of the spray preventing cover; a plunger cylinder is welded at the top; a thread is arranged at the upper part of the plunger cylinder; the plunger cylinder is connected with a hydraulic jack through the thread; the front end of an ejector rod of the hydraulic jack is connected with a sealing plunger through the thread; and the sealing plunger can enter the internal of the spray preventing cover through the plunger cylinder and the through hole in the top of the spray preventing cover. The spray preventing cover is a single-surface opening structure; operators operate on the back surface of an opening to prevent high-temperature crude oil from splashing to hurt people; if the blowout is severe and the operators cannot approach, the hydraulic high-temperature pumping well sealing machine can be fixed in the middle of a long rod; the two ends of the long rod are respectively held by two operators; the hydraulic high-temperature pumping well sealing machine is remotely inserted in an oil well packing box; and then, the operators approach for operating.

Description

technical field [0001] The invention relates to a hydraulic high-temperature pumping well sealing device and a use method thereof, which belong to the technical field of oil well safety in oil fields. Background technique [0002] At present, the vast majority of oilfield exploitation is to use the pumping unit to pump the crude oil out of the oil layer. The pumping well relies on the wellhead packing box and the rubber gate to seal the polished rod of the pumping well. Because the polished rod of the pumping well is affected by the alternating load for a long time, it is easy to cause the polished rod Steel fatigue, coupled with the need to drill clamps on the polished rod during the oil well operation, will cause damage to the polished rod. In the oil field, the polished rod often breaks off in the oil well. When the polished rod breaks longer than the polished rod, it will cause the polished rod Fall into the well, at this moment the packing box and the rubber gate have j...

AI Technical Summary

Problems solved by technology

[0002] At present, the vast majority of oilfield exploitation is to use the pumping unit to pump the crude oil out of the oil layer. The pumping well relies on the wellhead packing box and the rubber gate to seal the polished rod of the pumping well. Because the polished rod of the pumping well is affected by the alternating load for a long time, it is easy to cause the polished rod Steel fatigue, coupled with the need to drill clamps on the polished rod during the oil well operation, will cause damage to the polished rod. In the oil field, the polished rod often breaks off in the oil well. When the polished rod breaks longer than the polished rod, it will cause the polished rod If it falls into the well, the packing box and the rubber gate will lose their sealing effect, and the oil well will be out of control. When the oil well has self-spraying ability, blowout will occur

In the process of heavy oil production, it is necessary to inject steam to reduce the viscosity of crude oil. The oil well produced by steam injection has an oil temperature close to 100°C at the initial stage of pumping and has the ability of self-spraying. When the polished rod of the oil well breaks off, the high-temperature crude oil will flow Spray on root box, hard to control

Since there is currently no special blowout sealer for high-temperature oil wells, wooden sticks or metal rods are often inserted manually for sealing when high-temperature oil wells blow out. Since the packing of heavy oil wells is mostly graphite or fluororubber packing, which has high hardness and poor elasticity, manual insertion It will be very difficult to seal the rod, coupled with high-temperature crude oil splashing, there is a great risk of artificial plugging, so many oil wells cannot be treated after blowout, and have to be treated after the pressure of the oil well is reduced, which will cause serious environmental problems Pollution and Property Damage

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