CN114704221A - Manual-automatic integrated oil well wellhead packing box - Google Patents
Manual-automatic integrated oil well wellhead packing box Download PDFInfo
- Publication number
- CN114704221A CN114704221A CN202210355342.XA CN202210355342A CN114704221A CN 114704221 A CN114704221 A CN 114704221A CN 202210355342 A CN202210355342 A CN 202210355342A CN 114704221 A CN114704221 A CN 114704221A
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- Prior art keywords
- packing box
- joint
- packing
- heel
- elastic
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- 238000012856 packing Methods 0.000 title claims abstract description 188
- 239000003129 oil well Substances 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000003825 pressing Methods 0.000 claims abstract description 45
- 210000004907 gland Anatomy 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 241000191291 Abies alba Species 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000012046 side dish Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a manual-automatic integrated oil well mouth packing box, which comprises a joint, a heel bias cap and a heel bias disk, wherein the heel bias disk part is positioned between the heel bias cap and the joint and can move along with a polished rod along the horizontal direction; the packing box also comprises a polish rod and a packing box shell which extend along the axial direction of the packing box; the packing box joint is embedded at the upper part of the packing box shell, and an elastic packing box is arranged between the packing box joint and the polish rod; the periphery of the part of the polish rod arranged in the packing box shell is provided with a spiral packing; the packing box casing has one inclined plane in the lower part, and the lower part of the stuffing box joint is pressed with the pressing block, and the pressing block can slide along the inclined plane to press the elastic stuffing box. The packing box of the invention adopts the elastic packing box to replace the rigid packing box, and the back pressure of the well head is utilized to drive the pressing block to act on the outer surface of the elastic packing box, thereby acting on the packing, ensuring the lasting sealing effect and ensuring the long-term sealing without manual adjustment.
Description
Technical Field
The invention relates to the technical field of oil field oil extraction operation, in particular to a manual-automatic integrated oil well wellhead packing box.
Background
At present, a rigid packing box is adopted for sealing an oil well mouth, rubber or a cloth rubber ring is added into the packing box, a gland and a packing pressing cap are arranged on the upper portion of the packing box, the packing pressing cap is connected with the outer wall of the packing box through threads, the packing pressing cap is rotated downwards to drive the gland to press down to enable packing in the packing box to deform, and a sealing effect is generated.
The packing box structure in the prior art generally has the following defects, which are respectively:
1. the deformation of the packing is manually adjusted, the deformation cannot reach the always optimal state, the initial deformation is too large, the abrasion is high, the sealing performance is reduced after abrasion, and leakage and pollution are easily caused if the deformation is not adjusted in time.
2. Most packing boxes in the prior art do not have an offset adjusting function, only adopt an eccentric (transverse) or ball head (longitudinal) offset adjusting method with the offset adjusting function, belong to manual adjustment, have single function, and cannot change the direction and the distance once the packing boxes are adjusted. However, in actual operation, the wellhead deflection is complex and variable, and a single deflection adjustment cannot meet the requirement. Therefore, the leakage of a plurality of oil well mouths is very serious, which causes a great deal of resource waste and environmental pollution;
3. in the prior art, the oil field is to reduce loss and increase efficiency, and a large number of workers are reduced, so that a novel packing box structure which does not need or greatly reduces manpower is urgently needed.
Disclosure of Invention
The invention aims to provide a common sealing mode for realizing pressurization by replacing a rigid stuffing box with an elastic stuffing box, utilizing wellhead back pressure and utilizing a pressing block to surround the periphery of the elastic stuffing box to clamp the elastic stuffing box. The manual-automatic integrated oil well wellhead packing box has a good deviation following function, and labor cost can be greatly saved.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention relates to a manual-automatic integrated oil well wellhead packing box, which comprises:
the joint is positioned at the bottom, and the packing box is connected with an external Christmas tree joint through the joint;
a heel bias cap mounted on an upper portion of said fitting;
a heel bias plate, wherein the heel bias plate part is positioned between the heel bias cap and the joint and can move freely along the horizontal direction;
the packing box still includes:
a polish rod extending axially along the packing box;
the packing box shell is positioned on the upper part and connected with the upper part of the following deviation adjusting disc;
the packing box joint is embedded in the upper part of the packing box shell and is integrally connected to the upper part of the elastic packing box in a building manner;
the periphery of the part of the polish rod, which is arranged in the elastic stuffing box, is provided with a spiral packing;
the packing box comprises a packing box joint and a packing box body, wherein the packing box joint is provided with a lower part and a lower part, the lower part of the packing box body is provided with an inclined surface, the lower part of the packing box joint is pressed and held with a pressing block, and the pressing block can slide along the inclined surface to press the elastic packing box.
Further, the upper part of the joint is formed into a joint platform with a section size larger than that of the joint;
the inner ring of the joint platform is provided with a sealing ring base, a tracking and biasing sealing ring is embedded in the sealing ring base, and the section of the tracking and biasing sealing ring is configured to be concave;
the following bias plate includes:
a heel bias disk body; and
the upper heel deviation disc joint extends towards the packing box shell along the axis direction of the heel deviation disc body;
the heel deflection disc is sleeved outside the polish rod;
the upper surface of the heel bias disc body is pressed and held by the heel bias cap, and the heel bias disc can move along with the polish rod along the horizontal direction;
the heel bias cap is in threaded connection with the outer peripheral surface of the joint platform.
Furthermore, the lower part of the packing box shell is in threaded connection with the upper part of the upper joint of the deviation following disc, and the lower end of the packing box shell is provided with a locking ring;
and a self-sealing ring is arranged between the upper end of the upper joint of the following deviation disc and the packing box shell.
Furthermore, the lower end of the spiral packing is provided with a bottom support sleeved on the periphery of the polished rod;
the upper end of the spiral packing is provided with a Glan sleeved on the periphery of the polish rod;
the elastic packing box is positioned on the outer peripheral surfaces of the spiral packing, the bottom support and the Glan;
the inner diameter of the elastic stuffing box is smaller than the outer diameter of the spiral packing.
Furthermore, two sealing ring cavities are arranged on the periphery of the stuffing box joint at intervals along the length direction of the stuffing box joint, and O-shaped rings are embedded in the sealing ring cavities;
the pressing blocks are configured into a pipe structure with inclined planes at the upper end and the lower end, the pressing blocks are longitudinally and linearly cut into a plurality of blocks, and pipe walls with certain widths are cut off among the pressing blocks, so that a necessary space is ensured when the pressing blocks are inwards extruded;
the lower end of the stuffing box joint is provided with a surface matched with the inclined surface at the upper end of the pressing block, and the peripheries of the elastic stuffing boxes are pressed by the pressing block under the driving of the inclined surfaces between the stuffing box joint and the pressing block and between the pressing block and the packing box shell.
Furthermore, a rigid rubber sleeve rigid bottom ring is arranged at the bottom of the elastic stuffing box.
Furthermore, the upper end of the packing box shell is connected with a packing pressing cap in a threaded manner;
an adjusting nut is mounted on the upper portion of the polish rod, and the lower portion of the adjusting nut extends to the interior of the packing pressing cap and abuts against the upper end face of the gland.
Furthermore, the adjusting nut is in threaded connection with the inner ring of the packing pressing cap.
In the technical scheme, the manual-automatic integrated oil well wellhead packing box provided by the invention has the following beneficial effects:
the packing box adopts the elastic packing box to replace the rigid packing box, utilizes the back pressure of a wellhead and the elastic contraction force of the packing box to drive the spiral packing to be automatically adjusted in the process of gradual abrasion, and ensures long-term sealing without manual adjustment;
when a polished rod is out of round, the back pressure is too low, the crude oil viscosity is too high, the output temperature is too high, and a well is frequently hot-washed, the automatic adjusting force is insufficient, the packing pressing cap can be rotated and pressed downwards, the inclined surface at the lower part of the elastic packing box joint presses and holds the pressing block, the pressing block extrudes the elastic packing box inwards under the action of the inclined surface pressure, the pressure in the packing is increased, and the sealing effect of the packing is improved.
When the polish rod and the wellhead are not aligned, the polish rod drives the deflection following disc to transversely and flexibly move in a cavity formed between the deflection adjusting cap and the joint, and the elastic stuffing box is of a flexible structure and can adjust a certain amount of longitudinal deflection. When changing the packing, the locking ring is revolved downwards, and rotary disk root box casing pushes down from the sealing washer, from the sealing washer sealed polished rod that warp, accomplishes not putting the pressure change packing, reduces and changes packing operating time and avoids wasting of resources and environmental pollution.
The device comprises a joint, a heel bias cap, a heel bias disc and a heel bias sealing ring, wherein the heel bias disc is positioned between the heel bias cap and the joint and can move along with a polished rod along the horizontal direction, so that the real-time anti-bias function is realized; a self-sealing ring is arranged between the upper joint of the deviation following disc and the casing of the packing box, when the packing is replaced, the self-sealing ring is spun to deform, and an annular space between the packing box and the polished rod is sealed, so that the packing is replaced without pressure release, the resource waste is reduced, and the labor time is saved; the packing box joint is embedded at the upper part of the packing box shell, and an elastic packing box is arranged between the packing box joint and the polish rod; the spiral packing is arranged in the elastic packing box and tightly embraces the polished rod, so that the aim of sealing the annular space between the polished rod and the oil pipe is fulfilled; the lower part of the packing box shell is provided with an inclined plane, the lower part of the packing box joint and a plurality of pressing blocks with upper and lower inclined planes form a manual pressing device, the pressing blocks can be spirally pressed down on the packing pressing cap to drive the packing box joint to move downwards, the pressing blocks are extruded to move towards the center, the outer wall of the packing box is extruded, a pressure is added to the packing, and the sealing capability is improved; the packing box adopts the elastic packing box to replace the rigid packing box, utilizes the back pressure of a wellhead and the elastic contraction force of the packing box to drive the spiral packing to be automatically adjusted in the process of gradual abrasion, and ensures long-term sealing without manual adjustment; however, in wells with polished rod out of round, too low back pressure, too high crude oil viscosity, too high output temperature and frequent hot washing, the automatic force adjustment is insufficient, and at the moment, the packing pressing cap can be tightened to additionally apply pressure to meet the sealing requirement; also can be after packing automatically regulated limit, under the condition that does not have personnel in time to change the packing, can be screwed temporarily by tube well personnel, also can play the effect of interim sealing.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural diagram of a manual-automatic integrated oil well wellhead packing box provided by an embodiment of the invention.
Description of reference numerals:
1. a joint; 2. a tracking bias sealing ring; 3. a heel bias cap; 4. a following deviation disc; 5. locking a dead ring; 6. a packing box housing; 7. an elastic stuffing box; 8. a compression block; 9. packing pressing cap; 10. adjusting the screw cap; 11. a polish rod; 13. a stuffing box joint; 14. self-sealing ring;
101. a splice platform; 102. a seal ring base;
401. a heel bias disk body; 402. an upper joint of the following deviation disc;
701. a rubber sleeve rigid bottom ring;
1201. a spiral packing; 1202. glan; 1203. a bottom support;
1301. and sealing the annular cavity.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1;
the oil well wellhead packing box of this embodiment of manual-automatic, this packing box includes:
the joint 1 is positioned at the bottom, and the packing box is connected with an external Christmas tree joint through the joint 1;
a heel bias cap 3 mounted on the upper part of the joint 1;
the part of the following bias disk 4 is positioned between the following bias cap 3 and the joint 1, and the following bias disk 4 can move randomly along the horizontal direction;
the packing box still includes:
a polish rod 11 extending axially along the packing box;
the packing box shell 6 is positioned at the upper part and connected with the deviation adjusting disc 4;
a stuffing box joint 13 is embedded at the upper part of the packing box shell 6, and an elastic stuffing box 7 is arranged between the stuffing box joint 13 and the polish rod 11;
the periphery of the part of the polish rod 11 which is arranged in the elastic stuffing box 7 is provided with a spiral packing 401;
the packing box shell 6 has an inclined surface at the lower part, the lower part of the stuffing box joint 13 presses the pressing block 8, and the pressing block 8 can slide along the inclined surface to press the elastic stuffing box 7.
Wherein, the upper part of the joint 1 is formed into a joint platform 101 with the section size larger than that of the joint 1;
the inner ring of the joint platform 101 is provided with a sealing ring base 102, a tracking and biasing sealing ring 2 is embedded in the sealing ring base 102, and the section of the tracking and biasing sealing ring 2 is configured to be concave;
the following bias plate 4 includes:
a heel bias disk body 401; and
a heel bias upper joint 402 extending toward the packing box housing 6 in the axial direction of the heel bias body 401;
the following bias disc 4 is sleeved outside the polished rod 11;
the upper surface of the heel bias disc body 401 is pressed and held by the heel bias cap 3, and the heel bias disc 4 can move along the horizontal direction along with the polish rod 11;
the heel biasing cap 3 is screwed to the outer peripheral surface of the joint platform 101.
Specifically, this embodiment discloses a novel packing box structure, it mainly includes polished rod 11, packing box casing 6, be located the bottom and with production tree articulate's joint 1, the upper portion that connects 1 has joint platform 101, joint platform 101's inner circle is provided with concave type and follows inclined to one side sealing ring 2, and utilize and follow the bias voltage cap 3 and the threaded connection who connects platform 101 and realize following the pressure of inclined to one side dish 4 and hold, this embodiment with inclined to one side dish 4 can follow under the developments inclined to one side of polished rod 11 and well head, realize the follow-up of horizontal direction and adjust.
Preferably, the lower part of the packing box shell 6 of the embodiment is in threaded connection with the upper part of the upper heel bias plate joint 402, and the lower end of the packing box shell 6 is provided with a locking ring 5;
and a self-sealing ring 14 is arranged between the upper end of the upper heel-bias plate joint 402 and the packing box shell 6.
The lower end of the spiral packing 1201 is provided with a bottom support 1203 sleeved on the periphery of the polished rod 11;
the upper end of the spiral packing 1201 is provided with a gland 1202 sleeved on the periphery of the polish rod 11;
the elastic packing box 7 is positioned on the outer peripheral surfaces of the spiral packing 1201, the bottom support 1203 and the Glan 1202;
the inner diameter of the elastic stuffing box 7 is smaller than the outer diameter of the spiral packing 1201.
Two sealing ring cavities 1301 are arranged on the periphery of the stuffing box joint 13 at intervals along the length direction of the stuffing box joint, and O-shaped rings are embedded in the sealing ring cavities 1301;
the compressing blocks 8 are configured to be of a pipe structure with the upper end and the lower end both provided with inclined planes, the compressing blocks are longitudinally and linearly cut into a plurality of blocks, and a pipe wall with a certain width is cut off between the compressing blocks 8, so that a necessary space is ensured when the compressing blocks extrude inwards;
the lower extreme of gland adapter 13 has the inclined plane complex face with the upper end of compact heap 8, all orders about the periphery that the compact heap pressed and held elastic gland 7 through the inclined plane between gland adapter 13 and compact heap 8, and between compact heap 8 and packing box casing 6.
Wherein, the bottom of the elastic stuffing box 7 is provided with a rubber sleeve rigid bottom ring 701.
Wherein, the upper end of the packing box shell 6 is connected with a packing press cap 3 through a thread;
the upper portion of the packing gland 3 is mounted with the adjusting nut 10, and the lower portion of the adjusting nut 10 extends to the inside of the packing gland 3 and abuts against the upper end face of the flange 1202.
The adjusting nut 10 is in threaded connection with the inner ring of the packing pressing cap 3.
When the packing box is in work, the inner diameter of the elastic packing box 7 is smaller than the outer diameter of the spiral packing 1201, and when the spiral packing 1201 is added into the elastic packing box 7, the elastic packing box 7 is stressed by acting force to ensure that the elastic packing box 7 and the spiral packing form interference fit. The packing receives the elasticity inner hoop power of elastic packing box 7, and when normal production, the well head has certain back pressure, and the back pressure is acted on elastic packing box 7's surface equally to on acting on the packing, guarantee lasting sealing force, can guarantee for a long time sealed under the condition that need not artificial adjustment.
In the technical scheme, the manual-automatic integrated oil well wellhead packing box provided by the invention has the following beneficial effects:
the packing box adopts the elastic packing box 7 to replace a rigid packing box, utilizes the back pressure of a well mouth and the elastic contraction force of the elastic packing box 7 to drive the spiral packing to be automatically adjusted in the process of gradual abrasion, and ensures long-term sealing without manual adjustment.
When a polished rod 11 is out of round, the back pressure is too low, the crude oil viscosity is too high, the output temperature is too high, and a well is frequently hot-washed, the automatic adjusting force is insufficient, the packing pressing cap 3 can be rotated and pressed downwards, the inclined surface at the lower part of the elastic stuffing box joint presses and holds the pressing block 8, the pressing block 8 extrudes the elastic stuffing box 7 inwards under the action of the inclined surface pressure, the pressure in the packing is increased, and the packing sealing effect is improved.
When the polish rod 11 and a wellhead are not aligned, the polish rod 11 drives the deviation following disk 4 to transversely and flexibly move in a cavity formed between the deviation adjusting cap 10 and the joint 1, and the elastic stuffing box 7 is of a flexible structure and can adjust a certain amount of longitudinal deviation. When changing the packing, locking ring 5 is revolved downwards, and rotary disk root box casing pushes down from sealing ring 14, and from sealing ring 14 deformation sealing polished rod 11 accomplishes not putting and presses the change packing, reduces change packing operating time and avoids wasting of resources and environmental pollution.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (8)
1. Manual-automatic oil well wellhead packing box, its characterized in that, this packing box includes:
the joint (1) is positioned at the bottom, and the packing box is connected with an external Christmas tree joint through the joint (1);
a heel bias cap (3) mounted on the upper portion of the joint (1);
the part of the heel deviation disc (4) is positioned between the heel deviation cap (3) and the joint (1), and the heel deviation disc (4) can move freely along the horizontal direction;
the packing box still includes:
a polish rod (11) extending axially along the packing box;
the packing box shell (6) is positioned at the upper part and connected with the deviation adjusting disc (4);
a stuffing box joint (13) is embedded in the upper part of the packing box shell (6), and an elastic stuffing box (7) is arranged between the stuffing box joint (13) and the polish rod (11);
the periphery of the part of the polish rod (11) which is arranged in the elastic stuffing box (7) is provided with a spiral packing (1201);
the packing box shell (6) is provided with an inclined surface at the lower part, a pressing block (8) is pressed and held at the lower part of the packing box joint (13), and the pressing block (8) can slide along the inclined surface to press the elastic packing box (7).
2. The automated manual oil well wellhead packing box according to claim 1, characterized in that the upper part of the joint (1) is formed as a joint platform (101) with a cross-sectional dimension larger than that of the joint (1);
the inner ring of the joint platform (101) is provided with a sealing ring base (102), a tracking and biasing sealing ring (2) is embedded in the sealing ring base (102), and the section of the tracking and biasing sealing ring (2) is configured to be concave;
the heel bias plate (4) comprises:
a heel bias disk body (401); and
the upper heel deviation disc joint (402) extends towards the packing box shell (6) along the axial direction of the upper heel deviation disc body (401);
the tracking deviation disc (4) is sleeved outside the polish rod (11);
the upper surface of the heel bias disc body (401) is pressed and held by the heel bias cap (3), and the heel bias disc (4) can move freely along the horizontal direction along with the polish rod (11);
the heel bias cap (3) is in threaded connection with the outer peripheral surface of the joint platform (101).
3. The automated manual oil well wellhead packing box according to claim 2, characterized in that the lower part of the packing box shell (6) is in threaded connection with the upper part of the heel bias plate upper joint (402), and the lower end of the packing box shell (6) is provided with a locking ring (5);
and a self-sealing ring (14) is arranged between the upper end of the upper joint (402) of the following deviation disc and the packing box shell (6).
4. The manual-automatic oil well wellhead packing box according to claim 3, characterized in that the lower end of the spiral packing (1201) is provided with a bottom support (1203) sleeved on the periphery of the polish rod (11);
the upper end of the spiral packing (1201) is provided with a gram (1202) sleeved on the periphery of the polish rod (11);
the elastic packing box (7) is positioned on the outer peripheral surfaces of the spiral packing (1201), the bottom support (1203) and the Glan (1202);
the inner diameter of the elastic stuffing box (7) is smaller than the outer diameter of the spiral packing (1201).
5. The packing box of the manual-automatic oil well wellhead as claimed in claim 4, characterized in that the periphery of the stuffing box joint (13) is provided with two sealing annular cavities (1301) at intervals along the length direction of the stuffing box joint, and O-rings are embedded in the sealing annular cavities (1301);
the pressing blocks (8) are configured into pipes with inclined planes at the upper end and the lower end, the vertical lines are cut into a plurality of blocks, and pipe walls with certain width are cut off between the pressing blocks (8);
the lower end of the stuffing box joint (13) is provided with a surface matched with the inclined surface of the upper end of the pressing block (8), and the periphery of the elastic stuffing box (7) is pressed and held by the pressing block (8) through the inclined surfaces between the stuffing box joint (13) and the pressing block (8) and between the pressing block (8) and the packing box shell (6).
6. The packing box of an automatic manual oil well wellhead as claimed in claim 5 is characterized in that the bottom of the elastic stuffing box (7) is provided with a rubber sleeve rigid bottom ring (701).
7. The manual-automatic integrated oil well wellhead packing box according to claim 5, characterized in that the upper end of the packing box shell (6) is connected with a packing press cap (9) in a threaded manner;
an adjusting nut (10) is installed on the upper portion of the polish rod (11), and the lower portion of the adjusting nut (10) extends into the packing pressing cap (9) and abuts against the upper end face of the gland (1202).
8. The packing box of an automated manual oil well wellhead according to claim 7, characterized in that the adjusting nut (10) is in threaded connection with the inner ring of the packing gland cap (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355342.XA CN114704221A (en) | 2022-04-06 | 2022-04-06 | Manual-automatic integrated oil well wellhead packing box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355342.XA CN114704221A (en) | 2022-04-06 | 2022-04-06 | Manual-automatic integrated oil well wellhead packing box |
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| Publication Number | Publication Date |
|---|---|
| CN114704221A true CN114704221A (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210355342.XA Pending CN114704221A (en) | 2022-04-06 | 2022-04-06 | Manual-automatic integrated oil well wellhead packing box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116717211A (en) * | 2023-08-10 | 2023-09-08 | 陕西斯锐明天智能设备有限公司 | Self-sealing packing box |
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2022
- 2022-04-06 CN CN202210355342.XA patent/CN114704221A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116717211A (en) * | 2023-08-10 | 2023-09-08 | 陕西斯锐明天智能设备有限公司 | Self-sealing packing box |
| CN116717211B (en) * | 2023-08-10 | 2023-11-28 | 陕西斯锐明天智能设备有限公司 | Self-sealing packing box |
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