Pressurizing and pushing device of sleeve pipe
A technology for pushing devices and casings, which is applied to drilling equipment, drilling equipment and methods, and earthwork drilling and production, and can solve problems such as pressure transmission hydraulic devices and downhole equipment not working
Inactive Publication Date: 2012-09-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0002] Some downhole equipment needs to press on the hydraulic device to generate downward thrust to work. At present, the device that suppresses and generates downward thrust is to generate downward thrust from the oil pipe. If the pipe is pressurized, the pressure cannot be transmitted to the hydraulic device, and the downhole equipment cannot work
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Embodiment Construction
[0007] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0008] It is composed of upper joint 1, liquid transfer joint 2, large piston sealing ring 3, large piston 4, small piston 5, cylinder liner 6, outer cylinder 7, small piston sealing ring 8, and lower joint 9. The upper part of the cylinder 7 is connected, the lower part of the outer cylinder 7 is connected with the lower joint 9, the liquid transfer joint 2 is installed in the upper part of the outer cylinder 7, the lower part of the liquid transfer joint 2 is connected with the cylinder liner 6, and the large piston 4 is installed in the cylinder liner 6 , the large piston 4 is under the liquid transfer joint 2, the outer wall of the large piston 4 cooperates with the inner wall of the cylinder liner 6, the small piston 5 is installed in the lower joint 9, the outer wall of the small piston 5 cooperates with the inner wall of the lower joint 9, and the large pi...
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The invention relates to a pressurizing and pushing device of a sleeve pipe. In the pressurizing and pushing device, an upper connector is connected with the upper part of an outer barrel, the lower part of the outer barrel is connected with a lower connector, a lane liquid-transmitting connector is installed in the outer barrel, the lower part of the lane liquid-transmitting connector is connected with a cylinder sleeve, a large piston is installed in the cylinder sleeve, a small piston is installed in the lower connector, a large piston seal ring is installed between the large piston and the cylinder sleeve, a small piston seal ring is installed between the small piston and the lower connector, the outer barrel is provided with an inlet hole, the lane liquid-transmitting connector is provided with a radial hole, a channel and a vertical communication hole, the lower part of the large piston is provided with a hollow cavity, and an annular channel is arranged between the cylinder sleeve and the outer barrel. When the sleeve pipe is pressurized from the inside, the upper end of the large piston and the lower end of the small piston bear the pressure of the sleeve pipe, the lower end surface of the large piston bears the pressure in an oil pipe, and the pressure of the sleeve pipe is larger than the pressure of the oil pipe, so that a force for pushing the pistons downwards can be produced to provide a push force to underground equipment so as to enable the equipment to work. Therefore, the invention can produce the downward push force by pressurizing the sleeve pipe outside the oil pipe.
Description
1. Technical field [0001] The invention belongs to downhole workover and oil production equipment in an oil field, and is a casing pressing and pushing device. 2. Background technology [0002] Some downhole equipment needs to press on the hydraulic device to generate downward thrust to work. At present, the device that suppresses and generates downward thrust is to generate downward thrust from the oil pipe. If the pipe is pressurized, the pressure cannot be transmitted to the hydraulic device, and the downhole equipment cannot work. 3. Contents of the invention [0003] The purpose of the present invention is to provide a casing pressing and pushing device, which can generate downward thrust from the inside of the casing outside the oil pipe. [0004] The purpose of the present invention is achieved like this: it is made up of upper joint, sub-channel liquid transmission joint, large piston sealing ring, large piston, small piston, cylinder liner, outer cylinder, small ...
Claims
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IPC IPC(8): E21B7/20
Inventor 杜丙国于学信孙吉红袁长忠李明忠郗荣才孙玉龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)