Blowout-prevention connecting-tripping device
A technology of disconnector and lock sleeve, which is applied in the direction of wellbore/well components, earthwork drilling, sealing/isolation, etc. It can solve the problems of wasting time and resources, difficulty in downlinking of lock sleeves, and unsmooth docking, etc., to achieve Save energy, save time and resources, and prevent environmental pollution
Active Publication Date: 2013-11-20
LIAONING XINHUA INSTR CO LTD
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Problems solved by technology
[0002] During workover operations in the oilfield, in order to prevent crude oil from blowing out of the wellhead ground, a blowout preventer disconnector is now used for operations, but the existing blowout preventer disconnector has the following disadvantages: when a high pressure is generated between the sealing working cylinder and the oil well pump, It is difficult for the lock sleeve to go down during docking, so the docking cannot be carried out smoothly, and a pressurized vehicle is required to add water pressure into the well to push the center rod out of the sealed working cylinder before docking, which wastes time and resources
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[0012] See Figure 1-5 , the specific structure is as follows: including adopting the following prior art structure: fixing and assembling the claw 2 on the central rod 1, the sealing work cylinder 12 is arranged outside the central rod 1, and the support sleeve 4 and the lock sleeve 7 are also assembled on the central rod 1 A spring (A) 3 and a spring (B) 5 are respectively assembled between the claw 2 and the support sleeve 4, between the support sleeve 4 and the lock sleeve 7, and a protective sleeve 6 is arranged inside the spring 5. The inner side of the sealing mandrel 12 is provided with a sealing inner cone step. At the same time, the docking claw 16 and the limit joint 17 are provided. The main points of the improved technology are as follows: the lock sleeve 7 is provided with an outer cone step in contact with the inner cone step of the sealed working cylinder, and a transmission pin sliding hole 18 is opened on the inner side of the outer cone step of the lock sle...
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The invention relates to a blowout-prevention connecting-tripping device which comprises a center pole, a jack catch, a spring A, a spring B, a support sleeve, a lock sleeve, a seal working cylinder and a butt claw. The invention is characterized in that the lock sleeve is provided with seal outer cone steps which contact the inner cone steps of the seal working cylinder; the inner side of the seal outer cone steps of the lock sleeve is provided with a drive pin slide hole; a drive sleeve is movably assembled on the rear part of the lock sleeve; a waveform spring is assembled between the rear end of the lock sleeve and the drive sleeve; a drive pin penetrating through the slide hole is fixedly connected to the drive sleeve; the outer end of the drive pin is connected with a blowout-prevention sliding sleeve; and the drive sleeve is provided with an oil drain hole. The invention has the advantages that in the downhole remedial operation, the blowout-prevention connecting-tripping device can quickly relieve pressure, thereby providing convenience for butt joint, preventing crude oil from blowing out of the well hole ground to cause environmental pollution, and saving the energy, time and resources. The invention can adapt to the oil well operations under different well pressures.
Description
technical background: [0001] The invention belongs to a downhole tool for oil recovery operations in oil fields, in particular to a blowout preventer disconnector, which can prevent crude oil from blowing out of the wellhead ground during well workover operations and cause environmental pollution. Thus saving energy and achieving green operations. Background technique [0002] In the workover operation of the oil field, in order to prevent crude oil from blowing out of the wellhead ground, the blowout preventer disconnector is now used for operation, but the existing blowout preventer disconnector has the following disadvantages: when high pressure is generated between the sealing working cylinder and the oil well pump, It is difficult for the lock sleeve to go down during the docking, so the docking cannot be carried out smoothly, and a pressurized vehicle is required to add water pressure to the well to push the center rod out of the sealed working cylinder before docking,...
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IPC IPC(8): E21B33/06
Inventor 梁伟成
Owner LIAONING XINHUA INSTR CO LTD