Polymer composite particle multi-stage sealing device for pumping unit wellhead
A technology of composite particles and sealing devices, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of short service life of packing box and unsatisfactory sealing of well sealing device, etc., and achieve well sealing The effect of convenient and fast work
Active Publication Date: 2022-07-22
DAQING DANNUO PETROLEUM TECH DEV
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Problems solved by technology
[0004] In order to solve the problems of short service life of the packing box and unsatisfactory sealing of the sealing device, the present invention provides a multi-stage sealing device of polymer composite particles at the wellhead of the pumping unit. The sealing box of the present invention uses an air bag supplemented by a flexible polymer compound Particles form a flexible seal, utilizing the fluidity of spherical particles, under constant external pressure, when the particles close to the polished rod are worn and consumed, other particles will continue to flow under pressure to replenish the vacancy, thereby achieving a long-term seal
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[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0020] This embodiment includes a sealing box 1, a well sealing device 2, a deflection follower 4 and a blowout preventer 3, wherein the number of sealing boxes 1 is 2 or more, so that when the polished rod moves up and down, the sealing box 1 can realize the effect of the polished rod. Two-stage or three-stage flexible dynamic seal. The sealing box 1 , the well sealing device 2 , the deflecting follower 4 and the blowout preventer 3 are connected in sequence from top to bottom to form a whole, and there is a channel for the polished rod to pass through in the ...
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A multi-stage sealing device of polymer composite particles at the wellhead of a pumping unit relates to the field of wellhead sealing devices, comprising a sealing box, a well sealing device, a deflection follower and a blowout preventer. Air bag and flexible polymer composite spherical particles, the air bag is located in the shell A, the flexible polymer composite spherical particles are filled in the inner side of the air bag, the upper part of the air bag is connected with a vent pipe, and the lower part of the air bag is connected with a liquid inlet pipe The well sealer includes a casing B, a sealing ram A, and a sealing ram B. The casing B is sealed and connected with two vertical parallel sealing baffles, and the two sealing baffles separate the inner cavity of the casing B It is divided into three chambers, and the sealing ram A and the sealing ram B are located in the middle chamber. The curved notch has overlapping edges on both ends. The invention upgrades and improves the existing wellhead sealing device of the pumping unit, and is more suitable for actual use requirements.
Description
technical field [0001] The invention belongs to the field of wellhead sealing devices, and in particular relates to a multi-stage sealing device of polymer composite particles at the wellhead of a pumping unit. Background technique [0002] The traditional polished rod wellhead sealing device of pumping unit mainly includes packing box, well sealer, follower and blowout preventer, etc., among which the packing box plays the role of sealing the polished rod; the well sealer needs to be closed when replacing the packing. , Temporarily close the well to avoid the leakage of well fluid when replacing the packing; the follower can compensate the horizontal displacement of the polished rod 10-20mm and compensate for the vertical swing of a certain angle; when the polished rod breaks and falls into the well, the blowout preventer Automatically shut down to prevent oil leakage from blowout. [0003] There are many deficiencies in the traditional pumping unit wellhead sealing device...
Claims
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IPC IPC(8): E21B33/03E21B33/06
CPCE21B33/03E21B33/06
Inventor 高帅
Owner DAQING DANNUO PETROLEUM TECH DEV