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A downhole choke
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A choke and body technology, which is applied in the field of downhole choke, can solve the problems of long operating cycle of the choke, and achieve the effects of shortening the operating cycle, quickly balancing the upper and lower pressures, and reducing the cost of gas production
Active Publication Date: 2018-06-01
PETROCHINA CO LTD
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Problems solved by technology
[0006] In order to solve the problem of long operation period of the existing choke during fishing, the embodiment of the present invention provides a downhole choke
Method used
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Embodiment 1
[0027] Such as figure 1 As shown, the present invention provides a downhole choke, which is arranged inside the downhole pipeline. The downhole choke includes: a hand-off joint 1, a center pipe 3, a first shear pin 2, a locking pipe 14, a nozzle 15, Nozzle cap 16, body 4, elastic claw 12, slip seat 5, slip 7, upper rubber cylinder 8, upper cone 9, lower rubber cylinder 10, lower cone 11, elastic clamp 6, second shear pin 13 and a balance mechanism.
[0028] Wherein, there is a cylindrical groove in the lower part of the hand-off joint 1, and two threaded holes are arranged symmetrically along the circumferential direction on the side wall of the groove, the upper end of the central pipe 3 extends into the cylindrical groove, and the There are also two threaded holes correspondingly arranged on the side wall of the upper end, and the two first shear pins 2 are respectively connected to the drop joint 1 and the central pipe 3 through the corresponding threaded holes. The lower...
Embodiment 2
[0038] Such as figure 1 As shown, the present invention provides a downhole choke, which is arranged inside the downhole pipeline. The downhole choke includes: a hand-off joint 1, a center pipe 3, a first shear pin 2, a locking pipe 14, a nozzle 15, Nozzle cap 16, body 4, elastic claw 12, slip seat 5, slip 7, upper rubber cylinder 8, upper cone 9, lower rubber cylinder 10, lower cone 11, elastic clamp 6, second shear pin 13 and the balance mechanism; the upper end of the drop joint 1 and the center pipe 3 is connected through the first shear pin 2, the lower end of the center pipe 3 is connected with the locking pipe 14 in the axial direction, the oil nozzle 15 is arranged inside the locking pipe 14, and there are 16 sets of oil nozzle caps At the lower end of the oil nozzle 15; the body 4 is set on the central tube 3, the lower end of the body 4 is connected with the elastic claw 12, and the elastic claw 12 is matched with the locking tube 14; the slip seat 5, the slip 7, the...
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Abstract
The invention discloses an underground restrictor. The underground restrictor comprises a releasing connector, a central pipe, a first shearing pin, a locking pipe, an oil nozzle, an oil nozzle cap, a body, an elastic clamping jaw, a slip base, a slip, an upper rubber cylinder, an upper cone body, a lower rubber cylinder, a lower cone body, an elastic hoop, a second shearing pin and a balancing mechanism. According to the underground restrictor, through holes which are formed in the lateral walls of the central pipe, the body and the lower cone body; a first packing which is arranged between the central pipe and the body, a second packing which is formed between the body and the upper cone body and a third packing which is arranged between the locking pipe and the body form into the balancing mechanism; the through holes are mutually communicated; the first packing can seal the through hole in the body when covers the through hole in the body and the natural gas in pipelines is throttled and pressured down; when the first packing is detached from the through hole in the body, a large circulating channel is provided for natural gas below the underground restrictor, the salvage working cycle of the restrictor can be shortened, the gas production efficiency is improved, and the production costs are reduced.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a downhole choke. Background technique [0002] Natural gas is a multi-component mixed gaseous fossil fuel. It is easy to form natural gas hydrate under high pressure and low temperature conditions. Natural gas hydrate is easy to block pipelines. Therefore, it is necessary to prevent the formation of natural gas hydrate during natural gas transportation, that is, during natural gas transportation. To raise the temperature or reduce the pressure, the natural gas in the pipeline is throttled and depressurized by configuring a restrictor in the pipeline. [0003] Existing restrictors include a drop-in joint, a center pipe, a body, a slip seat, slips, a rubber cartridge, a grease nipple, and a grease nipple cap. The drop-off joint is connected with the center pipe, the body is set on the center pipe, the slip seat, slips, rubber tube, grease nipple, and grease ...
Claims
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Application Information
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