CN211974928U - Blowout prevention device for thermal production well mouth - Google Patents
Blowout prevention device for thermal production well mouth Download PDFInfo
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- CN211974928U CN211974928U CN202020370217.2U CN202020370217U CN211974928U CN 211974928 U CN211974928 U CN 211974928U CN 202020370217 U CN202020370217 U CN 202020370217U CN 211974928 U CN211974928 U CN 211974928U
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- 230000002265 prevention Effects 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 146
- 238000012856 packing Methods 0.000 claims abstract description 132
- 239000003292 glue Substances 0.000 claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 33
- 239000007924 injection Substances 0.000 claims abstract description 33
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 50
- 238000003860 storage Methods 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005086 pumping Methods 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 31
- 238000000605 extraction Methods 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention discloses a blowout prevention device for a thermal recovery wellhead, wherein a first sealing sleeve is provided with a first supporting flange; the inner profile surface of the sealing main body is provided with a first groove for embedding the first supporting flange and a second groove for embedding the second sealing sleeve, the sealing main body is provided with external threads, so that the sealing main body is fixed on the first sealing sleeve and the second sealing sleeve, a cavity is formed between the sealing main body and the polish rod, the first packing is arranged in the cavity at the upper part of the first sealing sleeve, and the second packing is arranged in the cavity between the first sealing sleeve and the second sealing sleeve; the sealing main body is provided with a glue injection hole at the position of the second packing, and a plugging device is arranged corresponding to the glue injection hole; the oil pumping device has the advantages of simple structure and reliable sealing performance, the second packing is sealed by glue injection, the temperature and pressure bearing load can be improved, the pressure bearing load of the first packing is reduced, the first packing is quickly replaced or a wellhead device is overhauled under a controllable state, pollution discharge and emptying are not needed, and the safe, efficient, environment-friendly and energy-saving production of oil pumping operation is realized.
Description
Technical Field
The invention relates to an oil field wellhead blowout preventer, in particular to a thermal recovery wellhead blowout preventer.
Background
At present, the pumping well adopts a wellhead sealing device to seal the space around a polished rod, and sealing materials are mostly O-shaped packing or spiral packing and other sealing packing. When the pumping unit well is used for replacing a wellhead sealing packing, the packing in the packing box is replaced after the well is sealed by a well plugging device. After the blowout preventer is used for a certain time, the sealing rubber part of the blowout preventer is aged and abraded, so that the blowout preventer is not sealed tightly. The wellhead can not be sealed when the packing is replaced, and the packing can not be replaced, so that the wellhead needs to be maintained. And the shut-in well killing needs to be carried out when the well plugging device is maintained every time, so that the time and the labor are wasted, and the yield and the material consumption are influenced. Slightly causes blowout and causes great pollution to the environment.
Patent document CN110107245A discloses a blowout prevention control tool for a wellhead of an oil pumping unit, which comprises an eccentric ball seat, a ball body and a bias adjusting cap, wherein the lower end of the ball body is hinged with a blowout prevention cover plate; a lower packing rubber pad is arranged on the inner hole of the ball body, positioning pins are arranged at the upper end and the lower end of the sealing main body, and a middle packing rubber pad is arranged on the inner hole separation boss of the sealing main body; a wave spring B is arranged on a separation boss of the pressing sleeve, and an upper coil rubber pad is arranged at the upper part of a spring seat; an upper pressing sleeve is arranged on the upper side of the upper packing rubber pad, and a wave spring A is arranged at the upper part of the upper pressing sleeve; the upper part of the pressing sleeve is in threaded connection with an adjusting sleeve, and a spring pressing cap positioned at the upper end of the wave spring A is in threaded connection with the adjusting sleeve. The packing rubber gasket can be subjected to bidirectional spring compensation, the service life of the packing rubber gasket is obviously prolonged, the damage of a polished rod is reduced, the problem of scaling of the polished rod of the ternary well is solved, the circulating well killing operation of a well plugging device can be avoided when the packing sealing filler is replaced, the expenditure is saved, and the productivity is improved.
This control tool is prevented spouting by beam-pumping unit well head is sealed effectual, but its structure is complicated for dismantle when changing the packing rubber pad wastes time and energy, have the problem that can't in time accurately know the sealed condition from the outside, and because the packing rubber pad of sealing packing carries out the unable high temperature high pressure gas injection well of adaptation of two-way spring compensation.
Disclosure of Invention
The invention aims to provide a blowout prevention device for a thermal production well mouth, which has the advantages of simple structure and reliable sealing performance, the second packing is sealed by glue injection, the temperature and pressure bearing load can be improved, the pressure bearing load of the first packing is reduced, the first packing is quickly replaced or a well mouth device is overhauled under a controllable state, pollution discharge and emptying are not needed, and safe, efficient, environment-friendly and energy-saving production of oil pumping operation is realized.
In order to achieve the purpose, the invention adopts the technical scheme that:
a blowout prevention device for a thermal production wellhead comprises a sealing main body, a first sealing sleeve, a second sealing sleeve, a first packing, a second packing, a packing pressing sleeve and a pressing cap, wherein the sealing main body, the first sealing sleeve, the second sealing sleeve, the first packing, the second packing, the packing pressing sleeve and the pressing cap are coaxially arranged with a polish rod; the first sealing sleeve is provided with a first supporting flange, the inner profile surface of the sealing main body is provided with a first groove for embedding the first supporting flange and a second groove for embedding the second sealing sleeve, and the outer profile surface of the sealing main body is provided with threads, so that the sealing main body is fixed on the first sealing sleeve and the second sealing sleeve, and a cavity is formed between the sealing main body and the polish rod;
the first packing is arranged in a cavity at the upper part of the first sealing sleeve, and the second packing is arranged in a cavity between the first sealing sleeve and the second sealing sleeve; the sealing main body is provided with a glue injection hole at the position of the second packing, and a plugging device is arranged corresponding to the glue injection hole;
the packing pressing sleeve is arranged at the upper part of the first packing, the packing pressing sleeve is axially provided with a first through hole for the light rod to penetrate through, the outer contour surface of the packing pressing sleeve is provided with a second supporting flange, and the lower part of the second supporting flange is provided with a third groove; and the inner profile surface of the pressing cap is provided with a fourth groove for embedding the second support flange and a fifth groove for embedding the sealing main body, and the fifth groove of the inner profile surface of the pressing cap is provided with internal threads, so that the pressing cap can be fixed on the packing pressing sleeve and screwed on the sealing main body.
Further, foretell thermal recovery well head blowout prevention device, the injecting glue hole is equipped with the internal thread, plugging device one end is equipped with the external screw thread that closes with the injecting glue hole spiral shell, and the plugging device middle part has the injecting glue runner with injecting glue hole intercommunication, still is equipped with the device that cuts of control injecting glue runner break-make on the plugging device.
Further, according to the blowout prevention device for the thermal recovery wellhead, the plugging device is provided with a second through hole perpendicular to the glue injection flow channel, and a bolt or a baffle is arranged in the second through hole to control the on-off of the glue injection flow channel.
Further, foretell thermal recovery well head blowout prevention device still contains the sealing member, it possesses the roof, well wall and lateral wall, wherein the roof supports the flange with the second and leans on, sealed main part upper portion is arranged in to well wall, thereby the roof, inject an oil storage portion between well wall and third recess, all be equipped with the screw thread on profile surface and the profile surface in the lateral wall, make the lateral wall twist to close in sealed main part, be equipped with the third packing between well wall and sealed main part top, be equipped with the oil extraction hole on well wall, should be equipped with oil extraction passageway in the sealed main part to oil extraction hole department, the lateral wall is twisted to close in the fourth recess, it is equipped with the exhaust hole to press cap and lateral wall to correspond oil storage portion department, it is equipped with closing device to correspond the exhaust hole.
Further, the thermal recovery wellhead blowout prevention device comprises a base body, wherein one end of the base body is provided with an external thread, the exhaust hole is provided with an internal thread, so that the base body is screwed with the exhaust hole, the middle of the base body is provided with an exhaust flow passage communicated with the oil storage part, the exhaust flow passage extends for a section to form a diameter-expanded blocking flow passage, the base body is provided with an air release hole communicated with the blocking flow passage, and a plug is arranged in the exhaust flow passage.
Further, foretell thermal recovery well head blowout prevention device, the lower extreme of pressing the cap is equipped with the third through-hole, penetrates the third through-hole through the locating pin and realizes pressing the cap and the fixed of sealed main part.
Further, foretell thermal recovery well head blowout prevention device, the slope setting is personally submitted to the sealing main part inner profile on first seal cover upper portion for after first packing is put into, first packing and first seal cover have the extension chamber.
The scheme provided by the embodiment of the invention has the beneficial effects that:
the packing well control device is simple in structure, the sealing main body, the sealing sleeve, the packing pressing sleeve and the pressing cap are installed through the flange and the groove in an embedded mode, the pressing cap is screwed on the sealing main body in a screwed mode to fix the packing pressing sleeve, the sealing sleeve and the sealing filler, and when the first packing well control device fails, the glue injection sealing well control device is started to conduct well control sealing on a well mouth. Meanwhile, the pressure cap and the packing pressure sleeve can be quickly detached to replace the first packing, the well control device is sealed by injecting glue, emptying is not needed during operation, the sealing reliability is high, the device is suitable for high-temperature and high-pressure pumping well sealing operation, and safe, efficient, environment-friendly and energy-saving production of pumping operation is realized.
Drawings
FIG. 1 is a schematic view of the blowout preventer of the thermal recovery wellhead of the present invention;
fig. 2 is a schematic diagram of the blowout preventer of the thermal recovery wellhead of the present invention in embodiment 4.
Reference numerals in the drawings of the specification include: the sealing device comprises a sealing main body 1, a first sealing sleeve 2, a second sealing sleeve 3, a first supporting flange 4, a first groove 5, a second groove 6, a first through hole 7, a first packing 8, a second packing 9, a glue injection hole 10, a plugging device 11, a packing pressing sleeve 12, a second supporting flange 13, a third groove 14, a pressing cap 15, a fourth groove 16, a fifth groove 17, a glue injection runner 18, a second through hole 19, an oil storage part 20, an exhaust hole 21, a third through hole 22, an expansion cavity 23, a top wall 25-1, a middle wall 25-2, a side wall 25-3, a third packing 26, an oil discharge hole 27, an oil discharge runner 28, an exhaust hole 29, a base body 30, an exhaust runner 31, a plugging runner 32, an air discharge hole 33 and a plug 34.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1: with reference to FIG. 1
The invention provides a blowout prevention device for a thermal production wellhead, which comprises a sealing main body 1, a first sealing sleeve 2, a second sealing sleeve 3, a first packing 8, a second packing 9, a packing pressing sleeve 12 and a pressing cap 15, wherein the sealing main body is coaxially arranged with a polish rod; the first sealing sleeve 2 is provided with a first supporting flange 4, the inner profile surface of the sealing main body 1 is provided with a first groove 5 for embedding the first supporting flange 4 and a second groove 6 for embedding the second sealing sleeve 3, the outer profile surface of the sealing main body 1 is provided with threads, so that the sealing main body 1 is fixed on the first sealing sleeve 2 and the second sealing sleeve 3, and a cavity is formed between the sealing main body 1 and the polished rod;
a first packing 8 is arranged in a cavity at the upper part of the first sealing sleeve 2, and a second packing 9 is arranged in a cavity between the first sealing sleeve 2 and the second sealing sleeve 3; the sealing main body 1 is provided with a glue injection hole 10 at the position of the second packing 9, a plugging device 11 is arranged corresponding to the glue injection hole 10, and when a wellhead needs to be plugged, glue can be injected into the sealing main body through the glue injection hole 10; the packing pressing sleeve 12 is arranged on the upper part of the first packing 8, the packing pressing sleeve 12 is axially provided with a first through hole 7 for a light rod to penetrate through, the outer contour surface of the packing pressing sleeve 12 is provided with a second supporting flange 13, and the lower part of the second supporting flange 13 is provided with a third groove 14; the inner profile of the pressure cap 15 is provided with a fourth groove 16 for the second support flange 13 and a fifth groove 17 for the sealing body 1, and the fifth groove 17 of the inner profile of the pressure cap 15 is provided with an internal thread, so that the pressure cap 15 can be fixed on the packing gland 12 and screwed on the sealing body 1.
The installation mode is as follows:
firstly, a second sealing sleeve 3 is matched on the outer contour surface of a polished rod, then a sealing main body 1 is sleeved into the polished rod, at the moment, the second sealing sleeve 3 is embedded into a second groove 6 of the sealing main body 1 to form the fixation of the sealing main body 1 and the second sealing sleeve 3, a second packing 9 is pressed into a cavity on the upper portion of the second sealing sleeve 3, after the second packing 9 is pressed, a first packing 8 is pressed into the cavity on the upper portion of the second packing 9, then a packing pressing sleeve 12 is placed on the upper portion of the first packing 8, the polished rod penetrates through a first through hole 7 of the packing pressing sleeve 12, then a pressing cap 15 is sleeved on the outer portion of the packing pressing sleeve 12, at the moment, a second supporting flange 13 of the packing pressing sleeve 12 is embedded into a fourth groove 16 on the pressing cap 15, the sealing main body 1 is embedded into a fifth groove 17, and the sealing main body 1 and the fifth groove 17.
The working principle is as follows: in the normal oil pumping operation, first packing 8 blocks at first that whole or partial well head pressure realizes sealing, when first packing 8 can't realize good sealing, the accessible pushes down packing and presses cover 12 and synchronous revolution and press cap 15, pushes down first packing 8 in the cavity of sealed main part 1, at this moment first packing 8 pushes down in the cavity of sealed main part 1 in step and horizontal extension gradually for first packing 8 and polished rod contact are inseparable, and then realize the oil recovery well head and seal.
When first packing 8 is not tight because of wearing and tearing and sealing, open plugging device 11 on the sealed main part 1, then through annotating gluey hole 10 to the 9 injecting glue of second packing, the gap between second packing 9 and the polished rod after the injecting glue is filled, the whole leakproofness of second packing 9 and sealing pressure can improve, at this moment first packing 8 of removable, the sealed well control device of injecting glue, need not empty during the operation, sealed reliability is high, is applicable to sealed high temperature, high-pressure oil gas well.
To sum up, this thermal recovery well head blowout prevention device, simple structure, sealing performance is reliable, and second packing 9 adopts the injecting glue sealed, has improved the temperature-bearing pressure-bearing load, guarantees that first packing 8 changes rapidly under controllable state, does not need the blowdown to be let out, has the effect of oil pumping operation safety, high efficiency and energy-concerving and environment-protective.
Example 2: with reference to FIG. 1
Compared with the embodiment 1, the difference is that the glue injection hole 10 is an internal thread hole, one end of the plugging device 11 is provided with an external thread screwed with the glue injection hole 10, the middle part of the plugging device 11 is provided with a glue injection flow passage 18 communicated with the glue injection hole 10, and the plugging device 11 is also provided with a cut-off device for controlling the on-off of the glue injection flow passage 18; only need during normal oil recovery operation with 11 external screw threads of plugging device's one end spiral shell closes in injecting glue hole 10, when first packing 8 is sealed not tight when needing to be changed, only need open and cut the device, through injecting glue 18 injecting glue in to second packing 9 of injecting glue runner to can realize injecting glue and second packing 9's quick sealing, the shut-in operation of being convenient for.
Example 3: with reference to FIG. 1
Compared with the embodiment 2, the difference is that the arrangement form of the blocking device can be various, specifically, the second through hole 19 perpendicular to the glue injection flow channel 18 is arranged on the blocking device 11, a bolt or a baffle is arranged in the second through hole 19 to control the on-off of the glue injection flow channel 18, the glue injection flow channel 18 is sealed by screwing the bolt or pressing the baffle downwards, and the glue injection flow channel 18 is opened by reverse operation.
Example 4: refer to FIG. 2
Compared with the above embodiment, there is provided a sealing member, the sealing member has a top wall 25-1, a middle wall 25-2 and a side wall 25-3, wherein the top wall 25-1 abuts against the second support flange 13, the middle wall 25-2 is disposed on the upper portion of the sealing main body 1, so that an oil storage portion 20 is defined between the top wall 25-1, the middle wall 25-2 and the third groove 14, threads are disposed on the inner and outer profiles of the side wall 25-3, so that the side wall 25-3 is screwed on the sealing main body 1, a third packing 26 is disposed between the middle wall 25-2 and the top of the sealing main body 1, an oil discharge hole 27 is disposed on the middle wall 25-2, an oil discharge passage 28 is disposed in the sealing main body 1 corresponding to the oil discharge hole 27, the side wall 25-3 is screwed in the fourth groove 16, a vent hole 29 is disposed in the pressure cap 15 and the side wall 25-3 corresponding to the oil storage portion 20, a closing means is provided corresponding to the exhaust hole 29.
When first packing 8 is not tight because the wearing and tearing of polished rod are sealed, the crude oil of leakage gets into above-mentioned sealed oil storage portion 20 through the gap of first packing 8 and packing pressure cover 12, then crude oil is because the limited gathering of sealing member and packing pressure cover 12 is in oil storage portion 20, then discharge along oil extraction channel 28, oil extraction pipe and oil discharge valve can be connected to oil extraction channel 28 outside, thereby the crude oil in the nimble oil storage portion 20 that discharges carries out the evacuation, open closing device and carry out the exhaust pressure release, when pressing cap 15 to packing pressure cover 12 application of force, accessible exhaust hole 21 sees through oil storage portion 20 and observes inside packing pressure cover 12 and the position of first packing 8, thereby can in time accurately know the encapsulated situation of first packing 8, after first packing 8 wearing and tearing, can in time change.
Example 5: refer to FIG. 2
Compared with the above embodiment, the difference is that the specific sealing device comprises a base body 30, one end of the base body 30 is provided with an external thread, the exhaust hole 29 is provided with an internal thread, so that the base body 30 is screwed with the exhaust hole 29, the middle part of the base body 30 is provided with an exhaust flow passage 31 communicated with the oil storage part 20, the exhaust flow passage 31 forms a blocking flow passage 32 with the diameter expanded after extending for a section, the base body 30 is provided with an air release hole 33 communicated with the blocking flow passage 32, and a screw plug 34 is arranged in the exhaust flow passage 31; only need withdraw plug 34 to bleed hole 33 rear when needing to exhaust, at this moment exhaust hole 29, exhaust runner 31 and bleed hole 33 switch on, can carry out the work of exhaust pressure release, when the encapsulated situation of first packing 8 needs to be observed, can dismantle plug 34 down completely to see through exhaust runner 31 and observe the position of packing pressure sleeve 12 and first packing 8, in time know the encapsulated situation of first packing 8. Of course, there are many sealing means for sealing the vent hole 29, which are not described here. The lower end of the pressing cap 15 is provided with a third through hole 22, and the pressing cap 15 and the sealing body 1 can be fixed by penetrating a positioning pin into the third through hole 22.
Example 6: with reference to FIGS. 1 and 2
Compared with the embodiment, the difference is that the inner contour surface of the sealing main body 1 at the upper part of the first sealing sleeve 2 is obliquely arranged, so that an expansion cavity 23 is formed between the first packing 8 and the first sealing sleeve 2 after the first packing 8 is placed in; when 12 first packing 8 of pushing down of cover are pressed to the packing, first packing 8 moves down and carries out horizontal extension and fill to extension chamber 23 to above-mentioned inclined position department, then first packing 8 is inseparabler with the polished rod contact to improved the sealed effect of first packing 8, still be equipped with the handle on 12 covers are pressed to the packing, press 12 not only convenient but also laborsaving through operating handle pushing down packing.
While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the detailed description and the accompanying drawings are not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
The above description is only a preferred embodiment of the present invention, and all equivalent changes made within the scope of the claims of the present invention should be covered by the claims of the present invention. The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (10)
1. A blowout prevention device for a thermal production wellhead comprises a sealing main body (1), a first sealing sleeve (2), a second sealing sleeve (3), a first packing (8), a second packing (9), a packing pressing sleeve (12) and a pressing cap (15), wherein the sealing main body is coaxially arranged with a polish rod; the method is characterized in that: the first sealing sleeve (2) is provided with a first supporting flange (4), the inner profile surface of the sealing main body (1) is provided with a first groove (5) for embedding the first supporting flange (4) and a second groove (6) for embedding the second sealing sleeve (3), the outer profile surface of the sealing main body (1) is provided with threads, so that the sealing main body (1) is fixed on the first sealing sleeve (2) and the second sealing sleeve (3), and a cavity is formed between the sealing main body (1) and the polished rod;
the first packing (8) is arranged in a cavity at the upper part of the first sealing sleeve (2), and the second packing (9) is arranged in a cavity between the first sealing sleeve (2) and the second sealing sleeve (3); a glue injection hole (10) is formed in the position, on the second packing (9), of the sealing main body (1), and a plugging device (11) is arranged corresponding to the glue injection hole (10);
the packing pressing sleeve (12) is arranged on the upper portion of the first packing (8), the packing pressing sleeve (12) is axially provided with a first through hole (7) for a light rod to penetrate through, a second supporting flange (13) is arranged on the outer contour surface of the packing pressing sleeve (12), and a third groove (14) is formed in the lower portion of the second supporting flange (13); and a fourth groove (16) for embedding the second supporting flange (13) and a fifth groove (17) for embedding the sealing main body (1) are arranged on the inner profile surface of the pressing cap (15), and an internal thread is arranged at the fifth groove (17) of the inner profile surface of the pressing cap (15), so that the pressing cap (15) can be fixed on the packing pressing sleeve (12) and screwed on the sealing main body (1).
2. The thermal recovery wellhead blowout prevention device of claim 1, wherein: the glue injection hole (10) is provided with an internal thread, one end of the plugging device (11) is provided with an external thread screwed with the glue injection hole (10), the middle part of the plugging device (11) is provided with a glue injection flow passage (18) communicated with the glue injection hole (10), and the plugging device (11) is also provided with a cut-off device for controlling the on-off of the glue injection flow passage (18).
3. The thermal recovery wellhead blowout prevention device of claim 2, wherein: and a second through hole (19) vertical to the glue injection flow channel (18) is formed in the plugging device (11), and a bolt or a baffle is arranged in the second through hole (19) to control the on-off of the glue injection flow channel (18).
4. A thermal recovery wellhead blowout prevention device according to any one of claims 1 to 3, wherein: the sealing structure further comprises a sealing element which is provided with a top wall (25-1), a middle wall (25-2) and a side wall (25-3), wherein the top wall (25-1) is abutted against the second supporting flange (13), the middle wall (25-2) is arranged on the upper portion of the sealing main body (1), an oil storage portion (20) is defined between the top wall (25-1), the middle wall (25-2) and the third groove (14), threads are arranged on the inner profile surface and the outer profile surface of the side wall (25-3), the side wall (25-3) is screwed on the sealing main body (1), a third packing (26) is arranged between the middle wall (25-2) and the top portion of the sealing main body (1), an oil discharge hole (27) is arranged on the middle wall (25-2), an oil discharge channel (28) is arranged in the sealing main body (1) corresponding to the oil discharge hole (27), and the side wall (25-3) is screwed in the fourth groove (16), the pressure cap (15) and the side wall (25-3) are provided with an exhaust hole (29) corresponding to the oil storage part (20), and a sealing device corresponding to the exhaust hole (29).
5. The thermal recovery wellhead blowout prevention device of claim 4, wherein: the sealing device comprises a base body (30), wherein one end of the base body (30) is provided with an external thread, the exhaust hole (29) is provided with an internal thread, so that the base body (30) is screwed with the exhaust hole (29), the middle part of the base body (30) is provided with an exhaust flow passage (31) communicated with the oil storage part (20), the exhaust flow passage (31) forms a blocking flow passage (32) with expanded diameter after extending for a section, the base body (30) is provided with an air release hole (33) communicated with the blocking flow passage (32), and a screw plug (34) is arranged in the exhaust flow passage (31).
6. The thermal recovery wellhead blowout prevention device of claim 5, wherein: the lower extreme of pressing cap (15) is equipped with third through-hole (22), penetrates third through-hole (22) through the locating pin and realizes pressing cap (15) and sealed main part (1) fixed.
7. A thermal recovery wellhead blowout prevention device according to any one of claims 1 to 3, wherein: the inner peripheral surface of the sealing main body (1) on the upper portion of the first sealing sleeve (2) is obliquely arranged, so that after the first packing (8) is placed in, an expansion cavity (23) is formed between the first packing (8) and the first sealing sleeve (2).
8. The thermal recovery wellhead blowout prevention device of claim 4, wherein: the inner profile of the sealing main body (1) on the upper part of the first sealing sleeve (2) is obliquely arranged, so that an expansion cavity (23) is formed between the first packing (8) and the first sealing sleeve (2) after the first packing (8) is placed in the sealing main body.
9. The thermal recovery wellhead blowout prevention device of claim 5, wherein: the inner profile of the sealing main body (1) on the upper part of the first sealing sleeve (2) is obliquely arranged, so that an expansion cavity (23) is formed between the first packing (8) and the first sealing sleeve (2) after the first packing (8) is placed in the sealing main body.
10. The thermal recovery wellhead blowout prevention device of claim 6, wherein: the inner profile of the sealing main body (1) on the upper part of the first sealing sleeve (2) is obliquely arranged, so that an expansion cavity (23) is formed between the first packing (8) and the first sealing sleeve (2) after the first packing (8) is placed in the sealing main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020370217.2U CN211974928U (en) | 2020-03-20 | 2020-03-20 | Blowout prevention device for thermal production well mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020370217.2U CN211974928U (en) | 2020-03-20 | 2020-03-20 | Blowout prevention device for thermal production well mouth |
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|---|---|
| CN211974928U true CN211974928U (en) | 2020-11-20 |
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| CN202020370217.2U Active CN211974928U (en) | 2020-03-20 | 2020-03-20 | Blowout prevention device for thermal production well mouth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898399A (en) * | 2021-09-30 | 2022-01-07 | 中煤科工集团重庆研究院有限公司 | Gas-tight gas blowout preventer for coal mine drilling |
-
2020
- 2020-03-20 CN CN202020370217.2U patent/CN211974928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898399A (en) * | 2021-09-30 | 2022-01-07 | 中煤科工集团重庆研究院有限公司 | Gas-tight gas blowout preventer for coal mine drilling |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231130 Address after: 832000, No. 28-A22 Dongwu Road, Development Zone, Shihezi City, Xinjiang Uygur Autonomous Region Patentee after: Shihezi Development Zone Shahai Sealing Materials Co.,Ltd. Address before: 832000 Room 601, unit 2, building 6, Tianfu Jingyuan, community 43, Shihezi City, Xinjiang Uygur Autonomous Region Patentee before: Luo Yongkang |