CN216110626U - Hydraulic wellhead sealer - Google Patents
Hydraulic wellhead sealer Download PDFInfo
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- CN216110626U CN216110626U CN202121461738.XU CN202121461738U CN216110626U CN 216110626 U CN216110626 U CN 216110626U CN 202121461738 U CN202121461738 U CN 202121461738U CN 216110626 U CN216110626 U CN 216110626U
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Abstract
The utility model discloses a hydraulic wellhead sealer, which comprises a sealing rubber barrel, wherein the center of the sealing rubber barrel is provided with an axial through hole for penetrating a polish rod; the device also comprises a sealing cavity and a check valve; the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole; the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside. The utility model effectively prevents oil, gas and water leakage of the well mouth, reduces the labor intensity of workers, improves the oil extraction rate of the oil well and ensures the clean production of the oil well.
Description
Technical Field
The utility model relates to the field of wellhead sealing equipment, in particular to a hydraulic wellhead sealer.
Background
At present, most of known oil production wells are oil pumping wells, and a wellhead packing box is a sealing device which ensures that the wellhead does not spray oil and does not leak oil when a polish rod moves in the wellhead packing box through a sealing packing arranged in the box. Usually all in time change the packing when the interior sealed packing of packing box wearing and tearing back, workman's intensity of labour has not only been increased like this, still because of changing the packing and stopping the well and reduce the oil recovery time rate of oil well, simultaneously because the stratum of some oil wells supplies liquid ability relatively poor and cause the oil well intermittent type to produce oil, when the oil well is producing the intermittent type to produce oil, can lead to polished rod and packing because of lacking crude oil lubrication and dry grinding, the packing wearing and tearing back, the well head is sealed not tight and the crude oil of seepage, the crude oil of seepage not only brings many extra work for daily patrolling and examining, still can bring safety ring protects the risk. In view of such problems, it is proposed to design a "hydraulic wellhead sealer". The device utilizes oil well self pressure to expand the sealed packing element, has realized that well head pressure is higher, and sealed purpose more tight. Even the oil well intermittently produces oil, the well mouth can be ensured to be sealed. The device can reduce the labor intensity of workers, improve the oil extraction efficiency of an oil well and ensure the clean production of the oil well.
Publication (bulletin) No.: CN107355191B, publication (public notice) day: 2019-05-07 discloses a wellhead sealing device, which relates to the technical field of oil and gas exploitation, and comprises a lower base, wherein the lower base is provided with a first opening in the vertical direction; the upper base can be detachably connected with the lower base, a cavity is formed between the upper base and the lower base, the upper base is provided with a second opening in the vertical direction, and oil pipes can be inserted into the first opening, the cavity and the second opening; the lower sealing core is arranged in the cavity, the upper end of the lower sealing core is connected with the side wall of the lower base, the lower end of the lower sealing core is connected with the side wall of the lower base, so that the lower sealing core and the side wall of the lower base form a hydraulic cavity, hydraulic oil is filled in the hydraulic cavity, a moving member penetrates through the lower end of the lower sealing core in the vertical direction, and the moving member can slide in the lower sealing core to adjust the volume of the hydraulic cavity; when the oil pipe is inserted into the wellhead sealing device, the lower sealing core is abutted against the oil pipe. The wellhead sealing device can effectively seal the wellhead of the fireflood oil well.
Publication (bulletin) No.: CN204703831U, publication (public notice) day: 2015-10-14 discloses a wellhead sealer comprising: the shell is connected to an upper oil pipe of the oil fishing wellhead; a packing arranged at the upper end in the shell; the wellhead packing gland is used for sealing the upper end of the shell; a piston is arranged in the shell, and a through hole for the steel wire rope to pass through is formed in the axial direction of the piston; the piston is sleeved with a first separating part and a second separating part, a cavity is formed between the first separating part and the second separating part, the piston comprises a piston body and an extending part, the extending part divides the cavity into a first hydraulic cavity and a second hydraulic cavity which are mutually separated, the piston can slide along the upper end and the lower end in the shell, a first channel for communicating the first hydraulic cavity with the outside is arranged on the first separating part, and a second channel for communicating the second hydraulic cavity with the outside is arranged on the second separating part; a pressing member connected to an upper end of the piston. This well head sealer can be when dragging for oil automatic fastening and loosen well head packing to improve the operating efficiency, reduce operation personnel intensity of labour.
Publication (bulletin) No.: CN210289697U, publication (public notice) day: 2020-04-10 discloses a novel wellhead polish rod sealing device, which adopts a lubricating cavity and a sponge form to lubricate a polish rod and reduce the wear of the polish rod. The descaling solution cavity and the sponge pretreat the water scale, and a leather brush is adopted to remove the water scale and wax crystals on the polished rod. Set up a plurality of inflation liquid rings, combine a plurality of liquid mouths of filling to pressurize once more to the inflation liquid ring to tighten packing once more improves the packing utilization ratio. The positioning bolt and the ball are combined with the universal ball to centralize and adjust the deviation of the optical rod. The annular piston and the hydraulic cavity are arranged, the piston can be pushed by filling liquid into the hydraulic cavity, then the packing is pushed to move outwards, and the packing is pushed out automatically. Compared with the existing wellhead polish rod sealing device, the wellhead polish rod sealing device has the characteristics of self-lubrication, wax and scale removal, high packing utilization rate, centering and deviation adjustment, automatic packing pushing-out, good sealing performance, high reliability and the like.
In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for further technical features, technical problems to be solved, and advantageous effects thereof.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a hydraulic wellhead sealer, which expands a rubber tube in a sealing cavity by utilizing the self pressure of an oil well, the larger the pressure of the oil well is, the tighter the rubber tube is sealed under the action of the pressure, when the pressure of the wellhead is reduced due to intermittent oil output of the oil well, the pressure of the sealing cavity is unchanged due to the action of a check valve, the rubber tube is still in a sealing state, the sealing performance of the wellhead of the oil well is ensured, and thus, the problem that a worker frequently changes a packing is solved, and the workload of the worker for patrolling and checking tight packing is reduced. Finally, the purpose of effectively preventing oil, gas and water leakage of a wellhead, reducing the labor intensity of workers, improving the oil extraction rate of an oil well and ensuring clean production of the oil well is achieved by using the device.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a hydraulic wellhead sealer comprises a sealing rubber barrel, wherein an axial through hole for penetrating a polish rod is formed in the center of the sealing rubber barrel;
the device also comprises a sealing cavity and a check valve;
the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole;
the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside.
Furthermore, the bottom end of the sealing cavity is provided with threads.
Furthermore, the upper port of the sealed central channel of the sealed cavity is provided with a thread for connecting a locking nut, and the bottom end of the locking nut presses the sealing rubber tube.
Further, the locking nut further comprises a lubricating mechanism, and the lubricating mechanism is connected to the upper end of the locking nut.
Further, the lubricating mechanism is an engine oil box, and the polish rod axially penetrates through the engine oil box, namely, the engine oil in the engine oil box is directly contacted with the polish rod.
Furthermore, an oil filling hole is formed in the top end of the engine oil box and is matched with a screw plug.
Furthermore, the sealing rubber tube is provided with a plurality of sealing rubber tubes, and a spacing ring is arranged between the sealing rubber tubes.
Further, still include emergent sealing device, emergent sealing device upper end is connected with seal chamber's bottom.
Compared with the prior art, the utility model has the following beneficial effects:
the engine oil box is positioned at the top of the device and is mainly used for lubricating the polish rod in the production process and ensuring the lubricity between the polish rod and the rubber barrel; the locking pressing cap is positioned at the lower part of the engine oil box and is used for mechanically pressing the sealing rubber barrel during initial installation so that the sealing rubber barrel expands to be in close contact with the polish rod and seal a well mouth; the spacing rings are positioned at two sides of the multistage rubber tube and are mainly used for pressing the rubber tube and isolating chambers at two sides of the rubber tube; the check valve is positioned at the bottom of the cavity at the outer side of the rubber barrel, and after the rubber barrel expands by the pressure of well fluid, the problem that the wellhead cannot be sealed due to the retraction of the rubber barrel caused by the pressure reduction of the cavity at the outer side of the rubber barrel when the pressure of an oil pipe is reduced is avoided; the emergency sealing device is positioned at the bottom of the hydraulic wellhead sealer, and can be used for emergency sealing when the rubber sleeve is worn and seriously sealed and fails, and also can be used for temporarily sealing the wellhead when the sealer is replaced.
The hydraulic wellhead sealer is installed on the wellhead of the oil well to seal the wellhead, so that oil, gas and water at the wellhead can be effectively prevented from leaking, and the purpose of oil well clean production is achieved. After the device is used, workers do not need to replace packing and inspect tight packing, so that the labor intensity of the workers is reduced, and the oil extraction time rate of an oil well is improved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic wellhead sealer of the present invention;
fig. 2 is a view showing the construction of a prior art emergency seal.
In the figure: 1. a machine oil box; 2. locking the nut; 3. sealing the cavity; 4. a spacer ring; 5. sealing the rubber tube; 6. a check valve; 7. an emergency sealing device; 8. and an oil filling hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 to 2, the present invention provides a technical solution:
a hydraulic wellhead sealer comprises a sealant barrel 5, wherein an axial through hole for penetrating a polish rod is formed in the center of the sealant barrel;
the device also comprises a sealing cavity 3 and a check valve 6;
the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole;
the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside.
Furthermore, the bottom end of the sealing cavity is provided with threads.
Furthermore, the upper port of the sealed central channel of the sealed cavity is provided with a thread for connecting a locking nut 2, and the bottom end of the locking nut presses the sealing rubber tube. The sealing rubber tube is provided with a plurality of sealing rubber tubes, and a spacing ring 4 is arranged between the sealing rubber tubes. Only one of the above-mentioned materials may be used, and the number of the above-mentioned materials is not limited, and the above-mentioned materials are within the protection scope of the present invention.
Further, the locking nut further comprises a lubricating mechanism, and the lubricating mechanism is connected to the upper end of the locking nut.
Further, the lubricating mechanism is an engine oil box 1, and the polish rod axially penetrates through the engine oil box, namely, the engine oil in the engine oil box is directly contacted with the polish rod.
Furthermore, an oil filling hole 8 is formed in the top end of the engine oil box and is matched with a screw plug.
Further, the emergency sealing device 7 is further included, and the upper end of the emergency sealing device is connected with the bottom end of the sealing cavity.
The use process comprises the following steps:
the first step is as follows: the hydraulic wellhead sealer device penetrates through a polished rod;
the second step is that: the spacer ring 4 is pressed down by the locking nut 2, and the sealant leather tube 5 is extruded to expand and tightly combine with the polish rod to seal the well mouth;
the third step: the well opening of the oil well, make the sealed cavity 3 fully filled with well fluid by the well head pressure-building method, the well fluid enters the cavity of the rubber tube of sealant 5 through the eyelet under the influence of pressure, make the rubber tube of sealant 5 expand and seal the well head under the influence of liquid pressure;
the fourth step: the locking nut 2 is loosened, but the locking nut is not completely dismounted, and the sealant leather barrel 5 is in a sealing state under the action of liquid pressure;
the fifth step: and engine oil is poured into the engine oil box 1, so that the lubricating property of the polish rod in the running process is ensured.
The check valve 6 is located at the bottom of the seal cavity 3, when the oil well intermittent oil outlet well hydraulic pressure is reduced, the pressure in the seal cavity 3 is not reduced under the action of the check valve 6, the seal rubber tube 5 is always in an expansion sealing state, when the oil well hydraulic pressure is increased, the well fluid can push the check valve 6 open to enter the seal cavity 3, and the expansion sealing performance of the seal rubber tube 5 can be enhanced accordingly.
The emergency sealing device 7 is positioned at the bottom of the hydraulic wellhead sealer, and can be used for emergency sealing when the sealing rubber sleeve 5 is worn and seriously fails and also can be used for temporarily sealing the wellhead when the sealer is replaced. The emergency sealing device 7 is the prior art, and as shown in the structure of fig. 2, the emergency sealing device can be directly matched with the application of the utility model, and is not described again.
According to the utility model, the rubber tube in the sealing cavity is expanded by utilizing the self pressure of the oil well, the rubber tube is sealed more tightly under the action of pressure when the pressure of the oil well is higher, and when the pressure of the well mouth is reduced due to intermittent oil output of the oil well, the pressure of the sealing cavity is unchanged due to the action of the check valve, and the rubber tube is still in a sealing state, so that the sealing property of the well mouth of the oil well is ensured, thereby not only solving the problem that a worker frequently changes a packing, but also reducing the workload of the worker for inspecting the tight packing. Finally, the purpose of effectively preventing oil, gas and water leakage of a wellhead, reducing the labor intensity of workers, improving the oil extraction rate of an oil well and ensuring clean production of the oil well is achieved by using the device.
Example 2:
referring to fig. 1 to 2, the present invention provides a technical solution:
a hydraulic wellhead sealer comprises a sealant barrel 5, wherein an axial through hole for penetrating a polish rod is formed in the center of the sealant barrel;
the device also comprises a sealing cavity 3 and a check valve 6;
the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole;
the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside.
Furthermore, the bottom end of the sealing cavity is provided with threads.
Furthermore, the upper port of the sealed central channel of the sealed cavity is provided with a thread for connecting a locking nut 2, and the bottom end of the locking nut presses the sealing rubber tube. The sealing rubber tube is provided with a plurality of sealing rubber tubes, and a spacing ring 4 is arranged between the sealing rubber tubes. Only one of the above-mentioned materials may be used, and the number of the above-mentioned materials is not limited, and the above-mentioned materials are within the protection scope of the present invention.
Further, the locking nut further comprises a lubricating mechanism, and the lubricating mechanism is connected to the upper end of the locking nut.
Example 3:
referring to fig. 1 to 2, the present invention provides a technical solution:
a hydraulic wellhead sealer comprises a sealant barrel 5, wherein an axial through hole for penetrating a polish rod is formed in the center of the sealant barrel;
the device also comprises a sealing cavity 3 and a check valve 6;
the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole;
the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside.
Although fig. 1 and 2 are used in all the above embodiments, it is obvious to those skilled in the art that individual drawings are not shown, as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiment with more components is only the best embodiment, and the embodiment with less components is the basic embodiment, but the basic object of the utility model can also be achieved, so all the modified embodiments are within the protection scope of the utility model.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A hydraulic wellhead sealer comprises a sealing rubber barrel, wherein an axial through hole for penetrating a polish rod is formed in the center of the sealing rubber barrel;
the device is characterized by also comprising a sealing cavity and a check valve;
the sealing cavity is provided with a sealing central channel for installing a sealing rubber barrel; the seal cavity is also provided with a hydraulic seal cavity; the hydraulic sealing cavity is communicated with the sealing central channel through a pressure transfer hole;
the bottom of the hydraulic sealing cavity is provided with a hydraulic inlet, and the check valve is arranged at the hydraulic inlet and only allows liquid to flow into the hydraulic sealing cavity from the outside.
2. A hydraulic wellhead sealer as claimed in claim 1 wherein the bottom end of the seal housing is threaded.
3. The hydraulic wellhead sealer according to claim 1 or 2, wherein the upper port of the sealing central channel of the sealing cavity is provided with threads for connecting a locking nut, and the bottom end of the locking nut presses the sealing rubber barrel.
4. A hydraulic wellhead sealer as claimed in claim 3 further comprising a lubrication mechanism connected to the upper end of the locknut.
5. The hydraulic wellhead sealer according to claim 4, wherein the lubricating mechanism is an oil box, and the polish rod axially penetrates through the oil box, namely, the oil inside the oil box is in direct contact with the polish rod.
6. A hydraulic wellhead sealer as claimed in claim 5, wherein the top of the oil box is provided with an oil hole and a screw plug.
7. A hydraulic wellhead sealer as claimed in claim 1, 2, 4, 5 or 6 wherein the packing sleeve is provided in plurality and with spacer rings in between.
8. A hydraulic wellhead sealer as claimed in claim 1, 2, 4, 5 or 6 and further including emergency seal means connected at its upper end to the bottom end of the seal chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461738.XU CN216110626U (en) | 2021-06-28 | 2021-06-28 | Hydraulic wellhead sealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461738.XU CN216110626U (en) | 2021-06-28 | 2021-06-28 | Hydraulic wellhead sealer |
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| Publication Number | Publication Date |
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| CN216110626U true CN216110626U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121461738.XU Active CN216110626U (en) | 2021-06-28 | 2021-06-28 | Hydraulic wellhead sealer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306342A (en) * | 2022-10-11 | 2022-11-08 | 克拉玛依红山油田有限责任公司 | Glue injection guiding sealing blowout preventer |
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2021
- 2021-06-28 CN CN202121461738.XU patent/CN216110626U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306342A (en) * | 2022-10-11 | 2022-11-08 | 克拉玛依红山油田有限责任公司 | Glue injection guiding sealing blowout preventer |
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