CN108266152B - Anti-eccentric packing box - Google Patents
Anti-eccentric packing box Download PDFInfo
- Publication number
- CN108266152B CN108266152B CN201611255227.6A CN201611255227A CN108266152B CN 108266152 B CN108266152 B CN 108266152B CN 201611255227 A CN201611255227 A CN 201611255227A CN 108266152 B CN108266152 B CN 108266152B
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- packing box
- eccentric sleeve
- box body
- packing
- sleeve
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- 238000012856 packing Methods 0.000 title claims abstract description 238
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 210000004907 gland Anatomy 0.000 claims description 28
- 238000003860 storage Methods 0.000 claims description 16
- 239000004519 grease Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 210000002445 nipple Anatomy 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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
Landscapes
- 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)
- Earth Drilling (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses an anti-deviation millstone root box, and belongs to the field of oilfield machinery. The packing box comprises a packing box body, a packing box pressing cap sleeved at the upper end of the packing box body, a pressing cover arranged in the packing box body and used for pressing the upper end of the packing, an adjusting piece and a double eccentric sleeve. The adjusting piece is arranged in the packing box body in a vertically movable mode, and the upper end of the adjusting piece abuts against the lower end of the packing; the upper end of the double eccentric sleeve is rotatably connected with the lower end of the packing box body, and the lower end of the double eccentric sleeve is rotatably connected with the upper end of the wellhead connector. The axis of this packing box accessible adjustment makes the axis coincidence of packing box and polished rod to prevent packing box and polished rod eccentric wear, and sealed effectual, be convenient for change the packing, can use widely on a large scale.
Description
Technical Field
The invention relates to the field of oilfield machinery, in particular to an anti-deflection grinding disc root box.
Background
The packing box is a sealing device for the polish rod of the oil pumping unit, and packing for penetrating the polish rod is filled in the packing box to seal an annular space between the oil pipe and the polish rod. However, along with the progress of oilfield production, many oil wells are influenced by geological factors, installation factors, pipeline deflection and the like, so that the wellhead of the oil well is deflected, a polished rod is caused to be concentric with a packing box, the packing box and the polished rod are seriously worn in one direction, wellhead puncture leakage, oil leakage and environmental pollution are easily caused, and meanwhile, potential safety hazards are caused due to leakage of oil gas. To overcome these problems, the packing and polish rod must be replaced frequently, which is time-consuming and laborious and increases the cost of oilfield exploitation. It is therefore desirable to provide a packing box with an adjustable axis to coincide with the axis of the polish rod, thereby reducing or avoiding one-way eccentric wear of the packing box and the polish rod.
The prior art provides an automatic deviation-adjusting wellhead packing box, which comprises a packing box and a pressing cap sleeved at the upper end of the packing box, wherein a gland for pressing packing is arranged inside the packing box, a deviation-adjusting seat is arranged at the lower end of the packing box, the deviation-adjusting box is sleeved on the deviation-adjusting seat, and the lower part of the deviation-adjusting box is connected with a wellhead tee joint. Wherein, be provided with the packing in the packing box, the seal cover dress is on the polished rod, and the offset seat offsets with the lower extreme of packing to the suit is on the polished rod. When the polished rod deviates, the deviation adjusting seat correspondingly deviates under the thrust of the polished rod, and the thrust of the polished rod and the deviation adjusting seat deviate drives the whole packing box to move along with the direction of the thrust, so that the polished rod and the packing box are concentric, and the packing and the polished rod are not eccentrically worn.
The inventors found that the prior art has at least the following problems:
The automatic deviation adjusting wellhead packing box provided by the prior art can not ensure that packing can dynamically seal the polish rod and is inconvenient to replace after the polish rod is deviated, and the axis of the packing box can be overlapped with the axis of the packing box again.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide the anti-deflection grinding disc root box which can be adjusted to enable the axis of the root box to coincide with the axis of the polish rod, can compress the root again and is convenient to replace the root. The specific technical scheme is as follows:
The embodiment of the invention provides an anti-bias grinding disc root box, which comprises a root box body, a root box pressing cap sleeved at the upper end of the root box body, a pressing cover arranged in the root box body and used for pressing the upper end of a root, and an adjusting piece which can be arranged in the root box body in a vertical moving way, wherein the upper end of the adjusting piece is propped against the lower end of the root; the upper end of the double eccentric sleeve is rotatably connected with the lower end of the packing box body, and the lower end of the double eccentric sleeve is rotatably connected with the upper end of the wellhead connector.
Specifically, as an optimization, the double eccentric sleeve comprises an upper eccentric sleeve, a connecting sleeve and a lower eccentric sleeve which are sequentially connected and communicated from top to bottom; the axis of the upper eccentric sleeve and the axis of the lower eccentric sleeve are respectively positioned at two sides of the axis of the connecting sleeve; the upper eccentric sleeve is rotatably connected with the lower end of the packing box body; the lower eccentric sleeve is rotatably connected with the upper end of the wellhead connector.
Specifically, as an optimization, the upper eccentric sleeve is sleeved outside the lower end of the packing box body in a threaded connection mode; the lower eccentric sleeve is sleeved inside the upper end of the wellhead connector in a threaded connection mode.
Specifically, as preferable, the inner wall of the upper eccentric sleeve is provided with a circle of inner annular steps, and the outer wall of the lower end of the packing box body is provided with a circle of outer annular steps; the upper eccentric sleeve is rotatably sleeved outside the lower end of the packing box body, the bottom wall of the packing box body abuts against the upper inner annular step, and the top wall of the upper eccentric sleeve abuts against the upper outer annular step; a circle of lower outer annular steps are arranged on the outer wall of the lower eccentric sleeve, and a circle of lower inner annular steps are arranged on the inner wall of the upper end of the wellhead connector; the lower eccentric sleeve is rotatably sleeved inside the upper end of the wellhead connector, the top wall of the wellhead connector abuts against the lower outer annular step, and the bottom wall of the lower eccentric sleeve abuts against the lower inner annular step.
Specifically, as preferable, a circle of first upper steel ring groove is formed in the bottom end of the packing box body along the circumferential direction; a circle of first lower steel ring grooves opposite to the first upper steel ring grooves are formed in the end face of the upper end of the upper inner annular step; the first upper steel ring groove is in butt joint with the first lower steel ring groove to form a first annular space; the bottom wall of the lower eccentric sleeve is provided with a circle of second upper steel ring grooves along the circumferential direction; a circle of second lower steel ring groove opposite to the second upper steel ring groove is formed in the end face of the upper end of the lower inner annular step; the second upper steel ring groove is in butt joint with the second lower steel ring groove to form a second annular space; and a steel ring is respectively arranged in the first annular space and the second annular space.
Specifically, as a preference, the packing box further includes an upper eccentric press cap and a lower eccentric press cap; the upper eccentric pressing cap is in threaded sleeve connection with the outer wall of the joint of the upper eccentric sleeve and the packing box body, and the top cover of the upper eccentric pressing cap abuts against the upper outer annular step; the lower eccentric pressing cap is in threaded fit on the outer wall of the joint of the lower eccentric sleeve and the wellhead connector, and the top cover of the lower eccentric pressing cap abuts against the lower outer annular step.
Specifically, as a preference, the regulating member includes a regulating cylinder and a gear portion; the adjusting cylinder is axially movably arranged in the packing box body, and the upper end of the adjusting cylinder abuts against the packing; the side wall of the adjusting cylinder is provided with a row of teeth from top to bottom; the gear part comprises a gear shaft and a gear which can rotatably penetrate through the gear shaft; a gear groove is formed in the side wall, opposite to the teeth, of the packing box body, the gear shaft is fixed in the gear groove, and the gear is meshed with the teeth; when the gear rotates in the gear groove, the adjusting cylinder is driven to move up and down.
Specifically, as preferable, an oil storage tank above the gland is arranged in the inner cavity of the packing box press cap, and a grease nipple communicated with the oil storage tank is arranged on the side wall of the packing box press cap.
Specifically, as a preference, the packing box further comprises an annular oil wiper arranged in the top cover of the packing box press cap; the annular oil wiper is positioned above the oil storage tank, and the middle inner cavity is used for enabling the polish rod to pass through in a dynamic sealing manner.
Specifically, as a preferable mode, the annular oil wiper is a packing; the packing box further comprises an oil wiper gland arranged in the top cover of the packing box gland, and the oil wiper gland is used for tightly pressing the oil wiper in the packing box gland.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
According to the anti-eccentric packing box provided by the embodiment of the invention, the double eccentric sleeve which is rotatably connected with the lower end of the packing box body is arranged, and the lower end of the double eccentric sleeve is rotatably connected with the upper end of the wellhead connector, so that the axial relative position of the upper end or the lower end of the double eccentric sleeve of the packing box body is changed when the packing box body and the double eccentric sleeve are rotationally adjusted, and the axial lines of the packing box body and the polished rod are overlapped, so that eccentric wear of packing and polished rod is prevented. Through setting up the regulating part, can realize compressing tightly the packing in the packing box body after the aligning packing box to make the annular clearance between packing seal and the polished rod, at the in-process of changing the packing, be convenient for extrude out the packing. Therefore, the anti-eccentric wear packing box provided by the embodiment of the invention can prevent the eccentric wear of the packing box and the polish rod by adjusting the axis of the packing box to coincide with the axis of the polish rod, has good sealing effect, is convenient for replacing the packing, and can be popularized and used on a large scale.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of an anti-bias packing box provided by an embodiment of the present invention;
fig. 2 is a cross-sectional view of a double eccentric sleeve provided by an embodiment of the present invention.
Wherein reference numerals denote:
1. The packing box body is provided with a packing box body,
2. The packing box is provided with a pressing cap,
3. The packing is arranged on the inner side of the packing,
4. The pressure cover is arranged on the upper surface of the pressure cover,
5. The adjusting part is provided with a plurality of adjusting parts,
501. The cylinder is adjusted to be in a closed state,
502. The gear part is provided with a gear wheel part,
6. A double eccentric sleeve is arranged on the inner side of the sleeve,
601. An upper eccentric sleeve is arranged on the upper eccentric sleeve,
602. The connecting sleeve is connected with the connecting sleeve,
603. A lower eccentric sleeve is arranged on the lower part of the lower eccentric sleeve,
7. A wellhead connector, a connecting piece and a connecting piece,
8. The upper eccentric pressing cap is arranged on the upper eccentric pressing cap,
9. The eccentric pressing cap is arranged down,
10. An oil storage tank is arranged in the oil storage tank,
11. A grease nipple,
12. An oil wiper is arranged on the inner side of the oil tank,
13. And (5) an oil wiper gland.
Detailed Description
Unless defined otherwise, all technical terms used in the embodiments of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention provides an anti-eccentric wear packing box, which is shown in an attached figure 1, and comprises a packing box body 1, a packing box pressing cap 2 sleeved at the upper end of the packing box body 1, a pressing cover 4, an adjusting piece 5 and a double eccentric sleeve 6, wherein the pressing cover 4 is arranged in the packing box body 1 and used for pressing the upper end of a packing 3. Wherein, the adjusting piece 5 is arranged in the packing box body 1 in a vertically movable way, and the upper end of the adjusting piece abuts against the lower end of the packing 3; the upper end of the double eccentric sleeve 6 is rotatably connected with the lower end of the packing box body 1, and the lower end is rotatably connected with the upper end of the wellhead connector 7.
The following describes the working principle of the anti-eccentric packing box provided by the embodiment of the invention:
Along with the reciprocating operation of the polish rod, the polish rod deflects to squeeze the packing 3 in the packing box body 1, so that the packing 3 is eccentrically worn, and in order to avoid eccentric wear of the polish rod and the packing 3, the embodiment of the invention provides an eccentric wear prevention packing box, and the technical problems are solved by rotationally adjusting the packing box body 1 or rotationally sleeving a double eccentric sleeve 6 at the lower end of the packing box body 1. Wherein, packing box body 1 suit of this packing box is on the polished rod, and packing box body 1 upper end cover is equipped with packing box pressure cap 2, is provided with the gland 4 that the suit is on the polished rod and is used for compressing tightly packing 3 upper end in the packing box body 1, and the rotatable connection of two eccentric cover 6 lower extreme and the well head connector 7 upper end of being connected of packing box body 1 lower extreme. When the polish rod is deflected, as the upper end of the double eccentric sleeve 6 and the lower end of the packing box body 1 are eccentrically arranged, only the packing box body 1 is rotationally adjusted, so that the relative positions of the axes of the packing box body 1 and the upper end of the double eccentric sleeve 6 are changed until the axes of the packing box body 1 and the polish rod coincide, and the packing 3 and the polish rod are prevented from being eccentrically worn. Because the lower end of the double eccentric sleeve 6 and the upper end of the wellhead connector 7 are eccentrically arranged, the relative position of the lower end of the double eccentric sleeve 6 and the axis of the wellhead connector 7 can be changed only by rotating and adjusting the lower end of the double eccentric sleeve 6, and the packing box body 1 does not rotate relative to the double eccentric sleeve 6, so that the relative position of the packing box body 1 and the axis of the wellhead connector 7 is changed until the axis of the packing box body 1 is overlapped with the axis of the polish rod, so that the packing 3 and the polish rod are prevented from being eccentrically worn. Through simultaneously rotating and adjusting the packing box body 1 and the double eccentric sleeve 6, the relative positions of the axes of the upper ends of the packing box body 1 and the double eccentric sleeve 6 can be changed, or the relative positions of the axes of the upper ends of the packing box body 1 and the wellhead connector 7 can be changed, so that the axes of the packing box body 1 and the polish rod are overlapped, and further the packing 3 and the polish rod are prevented from being eccentrically worn. After the position of the packing box is adjusted, the packing 3 can be ejected out by adjusting the adjusting piece 5, and then the packing 3 is replaced by adjusting the adjusting piece 5, wherein the adjusting piece 5 can move up and down in the packing box body 1 so as to prop against the lower end of the packing 3 and press the packing 3 tightly to seal an annular gap between the packing 3 and a polish rod.
Based on the above, the anti-eccentric packing box provided by the embodiment of the invention can realize that when the packing box body 1 and the double eccentric sleeve 6 are rotationally adjusted, the relative positions of the axes of the packing box body 1 and the upper end or the lower end of the double eccentric sleeve 6 are changed, so that the axis of the packing box body 1 and the axis of the polish rod are overlapped, and the eccentric wear of the packing 3 and the polish rod is prevented by arranging the double eccentric sleeve 6 which is rotationally connected with the lower end of the packing box body 1 and rotationally connecting the lower end of the double eccentric sleeve 6 with the upper end of the wellhead connector 7. Through setting up regulating part 5, can realize compressing tightly packing 3 in packing box body 1 after aligning the packing box to make the annular clearance between packing 3 seal and the polished rod, at the in-process of changing packing 3, be convenient for extrude packing 3. Therefore, the anti-eccentric wear packing box provided by the embodiment of the invention can prevent the eccentric wear of the packing box and the polish rod by adjusting the axis of the packing box to coincide with the axis of the polish rod, has good sealing effect, is convenient for replacing the packing, and can be popularized and used on a large scale.
Specifically, in the embodiment of the present invention, as shown in fig. 1 and fig. 2, the double eccentric sleeve 6 includes an upper eccentric sleeve 601, a connecting sleeve 602, and a lower eccentric sleeve 603, which are sequentially connected and conducted from top to bottom; the axis of the upper eccentric sleeve 601 and the axis of the lower eccentric sleeve 603 are respectively positioned at two sides of the axis of the connecting sleeve 602; the upper eccentric sleeve 601 is rotatably connected with the lower end of the packing box body 1; the lower eccentric sleeve 603 is rotatably connected with the upper end of the wellhead connector 7. The structure of the double eccentric sleeve 6 is arranged, so that when the packing box body 1 and the double eccentric sleeve 6 are adjusted in a rotating mode, the axis of the packing box body 1 coincides with the axis of the polish rod, the axis of the upper eccentric sleeve 601 and the axis of the lower eccentric sleeve 603 are located on two sides of the axis of the connecting sleeve 602 respectively, and the double eccentric sleeve 6 can be ensured to achieve a larger offset distance.
The upper eccentric sleeve 601 and the packing box body 1 are rotatably connected, and the lower eccentric sleeve 603 and the wellhead connector 7 are rotatably connected, for example:
As a first embodiment, the upper eccentric sleeve 601 is sleeved outside the lower end of the packing box body 1 in a threaded connection manner; the lower eccentric sleeve 603 is sleeved inside the upper end of the wellhead connector 7 in a threaded connection mode. The threaded connection mode is easy to set, and rotatable connection is convenient to achieve.
As a second embodiment: an upper inner annular step is arranged on the inner wall of the upper eccentric sleeve 601, and an upper outer annular step is arranged on the outer wall of the lower end of the packing box body 1; the upper eccentric sleeve 601 is rotatably sleeved outside the lower end of the packing box body 1, the bottom wall of the packing box body 1 abuts against the upper inner annular step, and the top wall of the upper eccentric sleeve 601 abuts against the upper outer annular step; the outer wall of the lower eccentric sleeve 603 is provided with a circle of lower outer annular steps, and the inner wall of the upper end of the wellhead connector 7 is provided with a circle of lower inner annular steps; the lower eccentric sleeve 603 is rotatably sleeved inside the upper end of the wellhead connector 7, and the top wall of the wellhead connector 7 abuts against the lower outer annular step, and the bottom wall of the lower eccentric sleeve 603 abuts against the lower inner annular step. The limit function can be achieved by the cooperation of the upper outer annular step, the upper inner annular step, the lower outer annular step and the lower inner annular step, so as to ensure that the rotatable process is performed in situ (i.e. only rotation is performed and no displacement is generated in the axial direction). In this embodiment, the rotatable connection may be achieved by providing a pulley and a circular chute adapted to the pulley, or by providing a circular slide rail and a circular chute adapted to the circular slide rail, and so on.
For example, a circle of first upper steel ring grooves are formed in the bottom end of the packing box body 1 along the circumferential direction; a circle of first lower steel ring grooves opposite to the first upper steel ring grooves are formed in the end face of the upper end of the upper inner annular step; the first upper steel ring groove is butted with the first lower steel ring groove to form a first annular space; the bottom wall of the lower eccentric sleeve 603 is provided with a circle of second upper steel ring grooves along the circumferential direction; a circle of second lower steel ring groove opposite to the second upper steel ring groove is arranged on the end surface of the upper end of the lower inner annular step; the second upper steel ring groove is butted with the second lower steel ring groove to form a second annular space; a steel ring is respectively arranged in the first annular space and the second annular space. The sealing performance between the packing box body 1 and the double eccentric sleeve 6 and between the double eccentric sleeve 6 and the wellhead connector 7 can be guaranteed through the arrangement, and meanwhile 360-degree rotation between the packing box body 1 and the double eccentric sleeve 6 and between the double eccentric sleeve 6 and the wellhead connector 7 can be well achieved. The section of the steel ring is cylindrical, so that the corresponding steel ring groove can roll conveniently.
Further, in order to fix the double eccentric sleeve 6 or the packing box body 1 to a proper position and ensure that the subsequent oil pumping operation is performed smoothly, as shown in fig. 1, the packing box provided by the embodiment of the invention further comprises an upper eccentric pressing cap 8 and a lower eccentric pressing cap 9; the upper eccentric pressing cap 8 is sleeved on the outer wall of the joint of the upper eccentric sleeve 601 and the packing box body 1 through threads, and the top cover of the upper eccentric pressing cap 8 abuts against the upper outer annular step; the lower eccentric pressing cap 9 is in threaded fit on the outer wall of the joint of the lower eccentric sleeve 603 and the wellhead connector 7, and the top cover of the lower eccentric pressing cap 9 abuts against the lower outer annular step. The upper eccentric pressing cap 8 and the lower eccentric pressing cap 9 are arranged to facilitate the packing box body 1 and the double eccentric sleeve 6, and the double eccentric sleeve 6 and the wellhead connector 7 to be firmly sleeved and connected. When the packing box body 1 or the double eccentric sleeve 6 needs to be rotationally adjusted, the upper eccentric pressing cap 8 or the lower eccentric pressing cap 9 at the corresponding position needs to be loosened first, and then the packing box body 1 or the double eccentric sleeve 6 needs to be rotated to a proper position.
It will be appreciated that in practicing the first embodiment, the upper eccentric press cap 8 and the lower eccentric press cap 9 may be provided as well, and the same effect can be achieved.
In order to ensure the sealing between the upper outer annular step of the packing box body 1 and the upper eccentric sleeve 601 of the double eccentric sleeve 6 and between the lower eccentric sleeve 603 of the double eccentric sleeve 6 and the lower inner annular step of the wellhead connection body 7, a plurality of O-rings can be provided to seal the corresponding annular gap.
In the embodiment of the present invention, since the upper eccentric sleeve 601 is rotatably connected with the lower end of the packing box body 1, the wall thickness of the lower end of the packing box body 1 is matched with the upper inner annular step of the upper eccentric sleeve 601, i.e., the lower end of the packing box body 1 is set to be gradually changed in wall thickness. Meanwhile, the lower inner annular step of the wellhead connector 7 is an eccentric annular step, and the wall thickness of the lower eccentric sleeve 603 is set to be gradually changed to be matched with the lower inner annular step.
In the embodiment of the invention, the left and right directions of operators facing the anti-bias disc root box are left and right, and the front and back directions of the anti-bias disc root box are front and back. Taking the example that the side wall of the upper eccentric sleeve 601 of the double eccentric sleeve 6, which is far away from the axis of the connecting sleeve 602, is on the right side, and the side wall of the lower eccentric sleeve 603, which is far away from the axis of the connecting sleeve 602, is on the left side:
When the polish rod is offset leftwards, the anti-bias grinding disc root box provided by the embodiment of the invention needs to be adjusted leftwards so that the axis of the polish rod coincides with the axis of the anti-bias grinding disc root box. The lower end of the packing box body 1 is adjusted through rotation, so that the thick part of the lower end wall of the packing box body 1 is propped against the inner wall of the upper eccentric sleeve 601 far away from the axis of the connecting sleeve 602, the axis of the packing box body 1 is offset leftwards, and the axis of the packing box body 1 is overlapped with the axis of the polish rod.
When the polish rod is shifted rightwards, the anti-bias grinding packing box provided by the embodiment of the invention needs to be rightwards adjusted so that the axis of the polish rod coincides with the axis of the anti-bias grinding disc packing box. The lower eccentric sleeve 603 of the double eccentric sleeve 6 is adjusted through rotation, so that the wall thickness of the lower eccentric sleeve 603 is propped against the inner wall of the lower inner annular step far away from the axis of the wellhead connector 7, the axis of the double eccentric sleeve 6 is shifted rightwards, the packing box body 1 sleeved in the upper eccentric sleeve 601 is driven to shift rightwards, and the axis of the packing box body 1 is further overlapped with the axis of the polish rod.
When the polish rod is offset forward or backward, the packing box body 1 and the double eccentric sleeve 6 are adjusted by rotating simultaneously so that the axis of the packing box body 1 and the axis of the polish rod coincide.
Specifically, as shown in fig. 1, in the embodiment of the present invention, the regulating member 5 includes a regulating cylinder 501 and a gear portion 502; the adjusting cylinder 501 is axially movably arranged in the packing box body 1, the upper end of the adjusting cylinder is propped against the packing 3, and a row of teeth are arranged on the side wall of the adjusting cylinder 501 from top to bottom; the gear portion 502 includes a gear shaft, a gear rotatably penetrating the gear shaft; a gear groove is formed in the side wall, opposite to the teeth, of the packing box body 1, a gear shaft is fixed in the gear groove, and the gear is meshed with the teeth; when the gears rotate in the gear grooves, the adjusting cylinder 501 is driven to move up and down. By rotating the gear portion 502, the gear is caused to give a tooth pushing force to push the adjustment cylinder 501 to move upward to press the packing 3 or move downward. For example, when the packing 3 in the packing box becomes loose, the annular gap between the packing 3 and the polish rod can be sealed by adjusting the gear portion 502 so that the adjustment cylinder 501 compresses the packing 3. In replacing the packing 3, the gear portion 502 may be adjusted to squeeze out the packing 3, which makes the operation of replacing the packing 3 convenient. Through limiting the adjusting piece 5 as above, the packing 3 is more convenient, safer and more controllable in compressing operation.
In order to facilitate the rotation of the gear part 502, the adjusting member 5 further includes a handle detachably coupled to the gear shaft of the gear part 502, and the gear part 502 is rotated by rotating the handle. The middle shafts of the handle and the gear portion 502 may be in threaded connection or clamped connection, and when the gear portion 502 needs to be adjusted, the middle shafts of the handle and the gear portion 502 are connected, and after adjustment, the handle can be detached from the gear portion 502. It should be noted that the installation of the handle does not affect the normal rotation of the gears in the tooth slots.
Specifically, in the embodiment of the present invention, as shown in fig. 1, an oil storage tank 10 located above a gland 4 is disposed in an inner cavity of a packing box press cap 2, and a grease nipple 11 in communication with the oil storage tank 10 is disposed on a side wall of the packing box press cap 2. The grease nipple 11 is arranged to facilitate the grease injection in the oil storage tank 10, so that the polish rod passes through the oil storage tank 10 and reciprocates when the oil pumping unit reciprocates, and the grease in the oil storage tank 10 is coated on the polish rod, thereby reducing the friction between the polish rod and the packing 3 and prolonging the service life of the packing 3. Wherein, the oil storage tank 10 is the reaming step hole that packing box pressure cap 2 inner chamber set up, and the diameter of oil storage tank 10 is greater than the diameter of other holes in the packing box pressure cap 2 inner chamber promptly to the butter of storage.
In particular, the annular wiper 12 may be a packing that serves to wipe and seal the gap with the polish rod. As shown in fig. 1, in order to facilitate the fixation of the annular oil wiper 12 in the top cover of the packing box press cap 2, the packing box provided by the embodiment of the present invention further includes an oil wiper gland 13 disposed in the top cover of the packing box press cap 2 for pressing the oil wiper 12 in the packing box press cap 2. Wherein, be provided with big diameter step hole and the minor diameter step hole that pass the polished rod and be linked together on the packing box pressure cap 2 roof, the lower extreme of annular oil wiper 12 offsets with the upper end in minor diameter step hole, and oil wiper gland 13 compresses tightly annular oil wiper 12 to offset with the lower extreme in big diameter step hole, set up big diameter step hole and minor diameter step hole and be convenient for annular oil wiper 12 and oil wiper gland 13 in the fixed position of packing box pressure cap 2. The inner diameter of the wiper gland 13 is smaller than the inner diameter of the annular wiper 12 to fit the polish rod.
There are various ways in which the wiper gland 13 is fixed to the top wall of the packing head 2, for example, as an embodiment: the oil wiper gland 13 is connected with the top wall of the packing box gland 2 through a compression screw, a plurality of vertical screw holes are formed in the top wall of the oil wiper gland 13 and the top wall of the packing box gland 2, and the vertical screw holes are respectively penetrated through the compression screws so as to fix the oil wiper gland 13 on the packing box gland 2. The mode is convenient to set up and is convenient for disassembling and assembling the oil wiper gland 13 and the packing box gland 2.
As another embodiment, the wall of the large-diameter stepped hole of the packing box press cap 2 is provided with an internal thread, the side wall of the oil wiper press cap 13 is provided with an external thread matched with the internal thread of the large-diameter stepped hole, and the oil wiper press cap 13 is sleeved in the large-diameter stepped hole of the packing box press cap 2 in a threaded connection mode. At this time, a threaded counter bore is required to be arranged on the upper end surface of the oil wiper gland 13, so that the oil wiper gland 13 can be conveniently disassembled and assembled.
The foregoing description of the preferred embodiments of the invention is not intended to limit the scope of the invention, but rather to cover any modifications, equivalents, improvements or the like within the spirit and scope of the present invention.
Claims (7)
1. The anti-eccentric packing box comprises a packing box body (1), a packing box pressing cap (2) sleeved at the upper end of the packing box body (1) and a pressing cover (4) arranged in the packing box body (1) and used for pressing the upper end of a packing (3), and is characterized by further comprising an adjusting piece (5) which is arranged in the packing box body (1) in a vertically movable manner, and the upper end of the adjusting piece is propped against the lower end of the packing (3);
The upper end of the double eccentric sleeve (6) is rotatably connected with the lower end of the packing box body (1), and the lower end of the double eccentric sleeve is rotatably connected with the upper end of the wellhead connector (7);
The double eccentric sleeves (6) comprise an upper eccentric sleeve (601), a connecting sleeve (602) and a lower eccentric sleeve (603) which are sequentially connected and communicated from top to bottom, wherein the upper eccentric sleeve (601), the connecting sleeve (602) and the lower eccentric sleeve (603) are of an integrated structure, the axis of the upper eccentric sleeve (601) and the axis of the lower eccentric sleeve (603) are respectively positioned at two sides of the axis of the connecting sleeve (602), the upper eccentric sleeve (601) is rotatably connected with the lower end of the packing box body (1), and the lower eccentric sleeve (603) is rotatably connected with the upper end of the wellhead connector (7);
An upper inner annular step is arranged on the inner wall of the upper eccentric sleeve (601), an upper outer annular step is arranged on the outer wall of the lower end of the packing box body (1), and the axis of the inner wall of the upper eccentric sleeve (601) is positioned at one side of the axis of the connecting sleeve (602); the upper eccentric sleeve (601) is rotatably sleeved outside the lower end of the packing box body (1), the bottom wall of the packing box body (1) is propped against the upper inner annular step, the top wall of the upper eccentric sleeve (601) is propped against the upper outer annular step, and the lower end of the packing box body (1) is provided with a gradual change wall thickness; the axis of the inner wall of the lower eccentric sleeve (603) coincides with the axis of the connecting sleeve (602), the axis of the outer wall of the lower eccentric sleeve (603) is positioned at the other side of the axis of the connecting sleeve (602), a circle of lower outer annular step is arranged on the outer wall of the lower eccentric sleeve (603), a circle of lower inner annular step is arranged on the inner wall of the upper end of the wellhead connector (7), the lower eccentric sleeve (603) is rotatably sleeved in the upper end of the wellhead connector (7), the top wall of the wellhead connector (7) is propped against the lower outer annular step, the bottom wall of the lower eccentric sleeve (603) is propped against the lower inner annular step, and the wall thickness of the lower eccentric sleeve (603) is gradually changed;
A circle of first upper steel ring grooves are formed in the bottom end of the packing box body (1) along the circumferential direction; a circle of first lower steel ring grooves opposite to the first upper steel ring grooves are formed in the end face of the upper end of the upper inner annular step; the first upper steel ring groove is in butt joint with the first lower steel ring groove to form a first annular space; a circle of second upper steel ring grooves are formed in the bottom wall of the lower eccentric sleeve (603) along the circumferential direction; a circle of second lower steel ring groove opposite to the second upper steel ring groove is formed in the end face of the upper end of the lower inner annular step; the second upper steel ring groove is in butt joint with the second lower steel ring groove to form a second annular space; and a steel ring is respectively arranged in the first annular space and the second annular space.
2. The packing box according to claim 1, wherein the upper eccentric sleeve (601) is sleeved outside the lower end of the packing box body (1) in a threaded connection manner;
The lower eccentric sleeve (603) is sleeved inside the upper end of the wellhead connector (7) in a threaded connection mode.
3. The packing box according to claim 1, characterized in that it further comprises an upper eccentric press cap (8) and a lower eccentric press cap (9);
the upper eccentric pressing cap (8) is in threaded sleeve connection with the outer wall of the joint of the upper eccentric sleeve (601) and the packing box body (1), and the top cover of the upper eccentric pressing cap (8) is propped against the upper outer annular step;
The lower eccentric pressing cap (9) is in threaded sleeve connection with the outer wall of the junction of the lower eccentric sleeve (603) and the wellhead connector (7), and the top cover of the lower eccentric pressing cap (9) is propped against the lower outer annular step.
4. The packing box according to claim 1, wherein the adjusting member (5) comprises an adjusting cylinder (501) and a gear portion (502);
The adjusting cylinder (501) is axially movably arranged inside the packing box body (1), and the upper end of the adjusting cylinder abuts against the packing (3);
the side wall of the adjusting cylinder (501) is provided with a row of teeth from top to bottom;
The gear part (502) comprises a gear shaft, a gear rotatably penetrating the gear shaft;
a gear groove is formed in the side wall, opposite to the teeth, of the packing box body (1), the gear shaft is fixed in the gear groove, and the gear is meshed with the teeth;
when the gear rotates in the gear groove, the adjusting cylinder (501) is driven to move up and down.
5. The packing box according to claim 1, characterized in that an oil storage tank (10) located above the gland (4) is arranged in the inner cavity of the packing box press cap (2), and a grease nipple (11) communicated with the oil storage tank (10) is arranged on the side wall of the packing box press cap (2).
6. The packing box according to claim 5, further comprising an annular oil wiper (12) provided in the top cover of the packing box press cap (2);
The annular oil wiper (12) is positioned above the oil storage tank (10), and the middle inner cavity is used for enabling the polish rod to pass through in a dynamic sealing mode.
7. The packing box according to claim 6, wherein the annular wiper (12) is a packing;
The packing box further comprises an oil wiper gland (13) arranged in the top cover of the packing box gland (2) and used for tightly pressing the oil wiper (12) in the packing box gland (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611255227.6A CN108266152B (en) | 2016-12-30 | 2016-12-30 | Anti-eccentric packing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611255227.6A CN108266152B (en) | 2016-12-30 | 2016-12-30 | Anti-eccentric packing box |
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| Publication Number | Publication Date |
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| CN108266152A CN108266152A (en) | 2018-07-10 |
| CN108266152B true CN108266152B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611255227.6A Active CN108266152B (en) | 2016-12-30 | 2016-12-30 | Anti-eccentric packing box |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914798B (en) * | 2020-07-08 | 2024-03-26 | 中国石油天然气股份有限公司 | Device for drilling fluid circulation system |
| CN114622895B (en) * | 2020-12-11 | 2024-09-24 | 中国石油化工股份有限公司 | Alarm trigger device for polished rod eccentric wear of pumping unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034022Y (en) * | 2007-05-28 | 2008-03-12 | 青绍江 | Eccentric-wear preventive eccentric adaptor of pumping rod |
| CN101158277A (en) * | 2007-11-09 | 2008-04-09 | 张建国 | Multifunctional polish rod sealing device |
| CN201133229Y (en) * | 2007-12-14 | 2008-10-15 | 季惠军 | Combination type packing kit |
| CN202731773U (en) * | 2012-05-28 | 2013-02-13 | 中国石油天然气股份有限公司 | Double-eccentric correcting device for wellhead packing box |
| CN203321400U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Oil well self-lubricating packing box device |
| CN206458390U (en) * | 2016-12-30 | 2017-09-01 | 中国石油天然气股份有限公司 | Anti-eccentric packing box |
-
2016
- 2016-12-30 CN CN201611255227.6A patent/CN108266152B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034022Y (en) * | 2007-05-28 | 2008-03-12 | 青绍江 | Eccentric-wear preventive eccentric adaptor of pumping rod |
| CN101158277A (en) * | 2007-11-09 | 2008-04-09 | 张建国 | Multifunctional polish rod sealing device |
| CN201133229Y (en) * | 2007-12-14 | 2008-10-15 | 季惠军 | Combination type packing kit |
| CN202731773U (en) * | 2012-05-28 | 2013-02-13 | 中国石油天然气股份有限公司 | Double-eccentric correcting device for wellhead packing box |
| CN203321400U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Oil well self-lubricating packing box device |
| CN206458390U (en) * | 2016-12-30 | 2017-09-01 | 中国石油天然气股份有限公司 | Anti-eccentric packing box |
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| Publication number | Publication date |
|---|---|
| CN108266152A (en) | 2018-07-10 |
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