Efficient wellhead packing box device

Abstract

The utility model provides an efficient wellhead packing box device. The efficient wellhead packing box device comprises a sleeve, an eccentric adjusting mechanism, packing and a rotary packing propelling mechanism. The sleeve is sleeved on the outer surface of the sucker rod; the inner wall of the first end of the eccentric adjusting mechanism is not coaxial with the inner wall of the second end of the eccentric adjusting mechanism; the packing is spirally and tightly wound on the outer surface of the sleeve; the packing has allowance outside the annular containing cavity of the eccentric adjusting mechanism, and when the rotary packing propelling mechanism rotates under the action of external force, the packing outside the annular containing cavity is gradually pressed into the annular containing cavity. Therefore, the eccentric adjusting mechanism is adjusted, the center line of the annular containing cavity, provided with the packing, of the second end of the eccentric adjusting mechanism is consistent with the center line of the sucker rod, the center line of an inner hole of the first end of the eccentric adjusting mechanism is consistent with a field pipeline, and eccentric wear is avoided. When the packing in the annular containing cavity is abraded, the packing is guided into the annular containing cavity, the packing in the annular containing cavity is added and reinforced, a sealing piece is supplemented and reinforced by short-time shutdown, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil exploitation, specifically, relates to a high -efficient well head packing box device. BACKGROUND

[0002] At present, in the process of oil field mine well head exploitation of crude oil, in order to avoid the leakage of crude oil, the well head is provided with a packing box mechanism.

[0003] Under normal circumstances, the oil pumping unit runs normally, and the well head packing box seals the oil conveying path, and the process flow can meet the on-site operation demand under normal circumstances, but in actual use, when the oil extraction pipe and the on-site well head oil pipe center line are inconsistent, the packing seal and the polished rod or the polished rod outer sleeve occur eccentric wear, the traditional packing box does not have the eccentric function, and the packing box with eccentric function has small eccentric amount, and the eccentric amount is large, and it is helpless, and it cannot be popularized on a large scale and has low adaptability.

[0004] And in order to ensure the smooth operation of the well site oil production process, the on-site oil pumping unit needs to be periodically overhauled and the belt is replaced, the old belt is idle in the well site, cannot be used again, and the conventional packing generally adopts custom-made nitrile rubber spiral cutting, the packing inner hole is damaged immediately, the long-term use cost is too high, and when the packing is replaced, the on-site downtime is long, which is not conducive to the development trend of increasing production and efficiency.

[0005] Therefore, a device is needed to solve the problems in the prior art. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a high -efficient well head packing box device to at least solve the problem that when the oil extraction pipe and the on-site well head oil pipe center line are inconsistent, the packing seal occurs eccentric wear.

[0007] In order to achieve the above purpose, the utility model provides a high -efficient well head packing box device, which comprises a sleeve, an eccentric adjusting mechanism, a packing and a rotary packing pushing mechanism, the sleeve is sleeved on the outer surface of the oil extraction rod, and the sleeve is used for centralizing the oil extraction rod, the eccentric adjusting mechanism first end inner wall coaxially sleeves the on-site well head, the eccentric adjusting mechanism second end inner wall and the sleeve outer surface form an annular accommodating cavity, the eccentric adjusting mechanism first end inner wall and the eccentric adjusting mechanism second end inner wall are not coaxial, the packing is installed in the annular accommodating cavity and is spirally tightly wound on the outer surface of the sleeve, and the rotary packing pushing mechanism first end sleeve is connected to the eccentric adjusting mechanism second end outer surface, and the rotary packing pushing mechanism is used for pressing the packing in the eccentric adjusting mechanism second end,

[0008] The disc root is left with a margin outside the eccentric adjusting mechanism annular accommodating cavity, and the rotating disc root pushing mechanism gradually pushes the disc root outside the annular accommodating cavity into the annular accommodating cavity when rotating under external force.

[0009] Optionally, the eccentric adjusting mechanism comprises a threaded connector, a fixed flange, an eccentric disc root box body, a movable flange and a first fixed screw rod; the threaded connector first end is sleeved with the field wellhead; the fixed flange is fixedly installed at the threaded connector second end; the eccentric disc root box body is arranged above the fixed flange, and the eccentric disc root box body first end is provided with an outer edge; an annular accommodating cavity is formed between the eccentric disc root box body second end inner wall and the casing outer surface, and the disc root is arranged in the annular accommodating cavity; the movable flange is arranged above the fixed flange, and the movable flange is internally provided with a clamping position; the clamping position cooperates with the outer edge to limit the movement of the eccentric disc root box body; and the first fixed screw rod penetrates through the fixed flange and the movable flange.

[0010] Optionally, the rotating disc root pushing mechanism comprises a pressing cap, a pressing disc, a disc root guide disc and a fixed pin; the pressing cap first end inner wall is sleeved with the eccentric adjusting mechanism second end outer surface; the pressing disc is provided with a vertical through hole; the pressing disc is located between the pressing cap second end inner end face and the eccentric disc root box body second end; the disc root guide disc is arranged above the pressing cap, and the disc root guide disc is provided with a pin hole corresponding to the vertical through hole; and the fixed pin connects the pressing disc and the disc root guide disc through the pin hole and the vertical through hole; and the fixed pin bottom end face contacts with the eccentric adjusting mechanism inner disc root top end.

[0011] Optionally, the pressing cap rotates downward under external force, and applies pressure to the pressing disc to compress the disc root in the eccentric adjusting mechanism; the disc root guide disc edge is provided with a notch, and the disc root margin outside the annular accommodating cavity is led out from the notch; and the disc root margin is gradually guided into the annular accommodating cavity when the disc root guide disc rotates under external force.

[0012] Optionally, the device further comprises a sealing assembly, the sealing assembly first end inner wall is fixedly connected with the casing top end, and the sealing assembly second end inner part is sealingly connected with the sucker rod outer surface; and the sealing assembly is used for preventing oil leakage from the gap between the casing top end and the sucker rod.

[0013] Optionally, the sealing assembly comprises a sealing structure and a supporting structure; the sealing structure comprises a conical sealing seat, a sealing rubber sleeve and a sealing pressure cap; the inner wall of the first end of the conical sealing seat is sealingly welded with the outer surface of the sleeve, and the inner wall of the second end of the conical sealing seat forms a conical inner cavity with the outer surface of the sucker rod; the sealing rubber sleeve is arranged in the conical inner cavity, the outer surface of the sealing rubber sleeve is tightly fitted with the conical inner cavity, and the inner wall of the sealing rubber sleeve is tightly fitted with the outer surface of the sucker rod; the inner wall of the sealing pressure cap is threadedly connected with the outer surface of the conical sealing seat, and the inner end surface of the sealing pressure cap is in contact with the top end surface of the sealing rubber sleeve; the supporting structure is arranged outside the sealing structure, and the supporting structure is used for supporting and fixing the sealing structure.

[0014] Optionally, the supporting structure comprises two slips and a plurality of second fixing screws; the two slips are symmetrically arranged, the inner wall of the first end of each slip is fitted with the sucker rod, and the upper surface of the inner rib of the second end of each slip is in contact with the bottom end surface of the conical sealing seat; each second fixing screw penetrates through the two slips respectively;

[0015] The outer surface of the first end of the conical sealing seat is provided with a notch with the sucker rod as the symmetric axis, and the inner part of each slip is provided with a notch corresponding to the notch of the conical sealing seat; the plurality of second fixing screws are arranged in two layers from top to bottom, the second fixing screws in the upper layer penetrate through the two slips, and each second fixing screw in the lower layer penetrates through the corresponding notches of the conical sealing seat and the slip to limit the relative movement of the conical sealing seat and the slip.

[0016] Optionally, the packing uses waste belts.

[0017] Optionally, the eccentric packing box body has a hexagonal load bearing structure, and the load bearing structure is used to drive the eccentric packing box body to rotate under external force.

[0018] Optionally, the rotating packing pushing mechanism further comprises a plurality of handles, and the plurality of handles are respectively installed on the pressure cap and the packing guide-in disc, and the handles are used to facilitate the rotation of the pressure cap and the packing guide-in disc under stress.

[0019] The utility model discloses a kind of high-efficiency wellhead packing box devices, including sleeve, eccentric adjusting mechanism, packing and rotary packing propulsion mechanism.Sleeve is sleeved on the outer surface of sucker rod, and sleeve is used to right sucker rod;Eccentric adjusting mechanism first end inner wall coaxially sleeve connects field wellhead, and annular accommodating cavity is formed between eccentric adjusting mechanism second end inner wall and the outer surface of sleeve;Eccentric adjusting mechanism first end inner wall is different from eccentric adjusting mechanism second end inner wall;Packing is installed in annular accommodating cavity, and is spirally tightly wound on the outer surface of sleeve;Rotary packing propulsion mechanism first end sleeve is connected to the outer surface of eccentric adjusting mechanism second end, and rotary packing propulsion mechanism is used to press packing in eccentric adjusting mechanism second end;Wherein, packing is left with excess in eccentric adjusting mechanism annular accommodating cavity, and when rotary packing propulsion mechanism rotates under external force, packing outside annular accommodating cavity is gradually pressed into annular accommodating cavity.Thereby when field sucker rod center line and wellhead pipeline center line are inconsistent, eccentric adjusting mechanism is adjusted, so that the center line of the annular accommodating cavity of eccentric adjusting mechanism second end installation packing is consistent with the center line of sucker rod, and the inner hole center line of eccentric adjusting mechanism first end is consistent with field pipeline, so as to avoid packing eccentric wear;And when packing in annular accommodating cavity wears, packing outside annular accommodating cavity can be introduced into annular accommodating cavity, packing in annular accommodating cavity is added, reinforced, so that it is again tightly matched with sleeve, and sealing element can be supplemented and reinforced in short time shutdown, and production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification illustrate preferred embodiments of the utility model and serve to explain the principles of the utility model. The utility model does not, however, limit the utility model to the preferred embodiments shown, but encompasses all such modifications as fall within the scope of the utility model.

[0021] Figure 1 It is a kind of high-efficiency wellhead packing box device structure schematic diagram according to the utility model embodiment option;

[0022] Figure 2 It is a kind of high-efficiency wellhead packing box device appearance schematic diagram according to the utility model embodiment option;

[0023] Figure 3 It is a kind of high-efficiency wellhead packing box device adjustment schematic diagram according to the utility model embodiment option.

[0024] Wherein, the above-mentioned drawing includes the following figure mark:

[0025] 10, sleeve; 20, eccentric adjusting mechanism; 21, threaded connector; 22, fixed flange; 23, eccentric disc root box body; 24, movable flange; 25, first fixed screw rod; 26, centralizing sleeve; 27, retaining ring; 30, packing; 40, rotating packing advancing mechanism; 41, pressure cap; 42, pressure plate; 43, packing guide plate; 44, fixing pin; 45, handle; 50, sealing assembly; 51, sealing structure; 511, conical sealing seat; 512, sealing rubber sleeve; 513, sealing pressure cap; 52, supporting structure; 521, slip; 522, second fixed screw rod. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] As shown in Figure 1 , Figure 2 and Figure 3 , an efficient wellhead packing box device includes a sleeve 10, an eccentric adjusting mechanism 20, a packing 30, and a rotating packing advancing mechanism 40. The sleeve 10 is sleeved on the outer surface of the sucker rod, and is used for centralizing the sucker rod. The first end inner wall of the eccentric adjusting mechanism 20 is coaxially sleeved on the field wellhead, and the second end inner wall of the eccentric adjusting mechanism 20 and the outer surface of the sleeve 10 form an annular accommodating cavity. The first end inner wall of the eccentric adjusting mechanism 20 is not coaxial with the second end inner wall of the eccentric adjusting mechanism 20. The packing 30 is installed in the annular accommodating cavity and is tightly wound on the outer surface of the sleeve 10 in a spiral manner. The first end of the rotating packing advancing mechanism 40 is sleeved on the outer surface of the second end of the eccentric adjusting mechanism 20, and the rotating packing advancing mechanism 40 is used to press the packing 30 tightly on the second end of the eccentric adjusting mechanism 20. Wherein, the packing 30 has a surplus outside the annular accommodating cavity of the eccentric adjusting mechanism 20, and when the rotating packing advancing mechanism 40 rotates under the action of external force, the packing 30 outside the annular accommodating cavity is gradually pressed into the annular accommodating cavity.

[0028] Specifically, the eccentric adjusting mechanism 20 is sleeved outside the sleeve 10, the packing 30 is tightly installed in the annular accommodating cavity between the eccentric adjusting mechanism 20 and the sleeve 10, and the rotating packing advancing mechanism 40 is sleeved on the outer surface of the eccentric adjusting mechanism 20. In the case that the field wellhead and the center line of the sucker rod are inconsistent, the eccentric adjusting mechanism 20 is adjusted to drive the sleeve 10 and the packing 30 to adjust together, so as to realize automatic alignment between the rotating packing advancing mechanism 40 of the sucker rod, the packing 30, the sleeve 10 and the sucker rod, and to minimize the phenomenon of eccentric wear of the sealing element in the packing box device when the sucker rod deviates.

[0029] The packing 30 is screwed into the annular accommodating cavity and tightly fits the casing 10. The packing 30 is pulled out from the annular accommodating cavity to the rotary packing advancing mechanism 40 with a reserved excess amount of the packing 30, i.e. the packing 30 has an excess amount after being installed in the annular accommodating cavity. When the packing 30 in the annular accommodating cavity is worn, the packing 30 outside the annular accommodating cavity can be quickly introduced into the annular accommodating cavity by rotating the rotary packing advancing mechanism 40, so as to add and reinforce the packing 30 in the annular accommodating cavity, so that the packing 30 tightly fits and seals the casing 10 again. The sealing element can be supplemented and reinforced in a short time of shutdown, and the production efficiency is improved.

[0030] In a possible implementation, the eccentric adjusting mechanism 20 comprises a threaded connector 21, a fixed flange 22, an eccentric packing box 23, a movable flange 24 and a first fixed screw 25. The first end of the threaded connector 21 is connected to the field wellhead. The fixed flange 22 is fixedly installed at the second end of the threaded connector 21. The eccentric packing box 23 is arranged above the fixed flange 22, and the first end of the eccentric packing box 23 is provided with an outer edge. An annular accommodating cavity is formed between the inner wall of the second end of the eccentric packing box 23 and the outer surface of the casing 10, and the packing 30 is arranged in the annular accommodating cavity. The movable flange 24 is arranged above the fixed flange 22, and a clamping position is arranged in the movable flange 24. The clamping position cooperates with the outer edge to limit the movement of the eccentric packing box 23. The first fixed screw 25 penetrates the fixed flange 22 and the movable flange 24.

[0031] Specifically, the inner wall of the lower end of the threaded connector 21 is connected to the field wellhead through pipe threads, and the fixed flange 22 is welded on the top of the threaded connector 21. The second end of the eccentric packing box 23 is connected to the rotary packing advancing mechanism 40 through threads, and the packing 30 is arranged in the annular accommodating cavity between the inner wall of the second end of the eccentric packing box 23 and the outer surface of the casing 10. The eccentric packing box 23 is an eccentric component, the center line of the inner wall of the upper end of the eccentric packing box 23 is adapted to the center line of the sucker rod, and the center line of the inner wall of the lower end of the eccentric packing box 23 is adapted to the center line of the field wellhead, so that the upper and lower components with different centers can be connected through the eccentric packing box 23.

[0032] The movable flange 24 is arranged above the fixed flange 22, and the protruding outer edge of the first end of the eccentric packing box 23 is clamped between the movable flange 24 and the fixed flange 22. The movable flange 24 and the fixed flange 22 are fixedly penetrated by the first fixed screw 25. When the first fixed screw 25 is tightened, the eccentric packing box 23 is fixed and cannot move. When the first fixed screw 25 is loosened, the eccentric packing box 23 can rotate around the center of the bottom end face.

[0033] The eccentric disc root box 23 is further provided with a righting sleeve 26 and a check ring 27, both of which are sleeved on the outer surface of the casing 10, and the check ring 27 is placed at the bottom of the annular accommodating cavity to provide support for the installation of the disc root 30. The righting sleeve 26 is clamped between the eccentric disc root box 23, the check ring 27 and the outer surface of the casing 10, and is used to right the casing 10.

[0034] In a possible implementation, the rotating disc root advancing mechanism 40 comprises a pressing cap 41, a pressing disc 42, a disc root guide disc 43 and a fixed pin 44. The first end inner wall of the pressing cap 41 is sleeved on the outer surface of the second end of the eccentric adjusting mechanism 20. The pressing disc 42 is provided with a vertical through hole, and is located between the second end inner end face of the second end of the pressing cap 41 and the second end of the eccentric disc root box 23. The disc root guide disc 43 is arranged above the pressing cap 41 and is provided with a pin hole corresponding to the vertical through hole. The fixed pin 44 is connected with the pressing disc 42 and the disc root guide disc 43 through the pin hole and the vertical through hole respectively. The bottom end face of the fixed pin 44 is in contact with the top end of the disc root 30 in the eccentric adjusting mechanism 20. When the pressing cap 41 rotates and moves downward under the action of an external force, the pressing cap 41 applies pressure to the pressing disc 42 to press the disc root 30 tightly in the eccentric adjusting mechanism 20. The disc root guide disc 43 is provided with a notch at the edge thereof, and the disc root surplus outside the annular accommodating cavity is led out from the notch. When the disc root guide disc 43 rotates under the action of an external force, the disc root surplus is gradually introduced into the annular accommodating cavity.

[0035] Specifically, the inner wall of the pressing cap 41 is connected with the outer surface of the second end of the eccentric adjusting mechanism 20 through threads, and the pressing cap 41 is movable up and down when it rotates under the action of a force. The inner end face of the pressing cap 41 is in contact with the top end of the pressing disc 42. The first end of the fixed pin 44 is installed in the disc root guide disc 43, and the second end penetrates through the pressing disc 42 through a threaded pin hole in the pressing disc 42, so as to connect the pressing disc 42 and the disc root guide disc 43. The end face of the second end of the fixed pin 44 is in contact with the top end of the disc root 30 in the annular accommodating cavity, and the fixed pin 44 presses the disc root 30 tightly in the annular accommodating cavity. The disc root guide disc 43 is provided with a notch at the edge thereof, and the disc root surplus outside the annular accommodating cavity is led out from the notch. When the disc root guide disc 43 rotates under the action of an external force, the disc root surplus is gradually pressed into the annular accommodating cavity under the traction of the notch.

[0036] In a possible implementation, the device further comprises a sealing assembly 50, the first end inner wall of the sealing assembly 50 is fixedly connected with the top end of the casing 10, and the second end inner wall of the sealing assembly 50 is sealingly connected with the outer surface of the sucker rod. The sealing assembly 50 is used to prevent oil leakage from the gap between the top end of the casing 10 and the sucker rod.

[0037] Specifically, the sleeve 10 is sleeved on the sucker rod, a gap is formed between the top end surface of the sleeve 10 and the outer surface of the sucker rod, the sealing assembly 50 is sleeved on the sleeve 10 and the sucker rod, and the top end surface of the sleeve 10 and part of the outer surface of the sucker rod are completely sealed inside the sealing assembly 50, so that the oil liquid is prevented from leaking from the gap.

[0038] In a possible implementation, the sealing assembly 50 comprises a sealing structure 51 and a support structure 52, the sealing structure 51 comprises a conical sealing seat 511, a sealing rubber sleeve 512 and a sealing compression cap 513; the inner wall of the first end of the conical sealing seat 511 is sealingly welded to the outer surface of the sleeve 10, and the inner wall of the second end of the conical sealing seat 511 forms a conical inner cavity with the outer surface of the sucker rod; the sealing rubber sleeve 512 is arranged in the conical inner cavity, the outer surface of the sealing rubber sleeve 512 is tightly fitted with the conical inner cavity, and the inner wall of the sealing rubber sleeve 512 is tightly fitted with the outer surface of the sucker rod; the inner wall of the sealing compression cap 513 is threadedly connected with the outer surface of the conical sealing seat 511, and the inner end surface of the sealing compression cap 513 is in contact with the top end surface of the sealing rubber sleeve 512; the support structure 52 is arranged outside the sealing structure 51, and the support structure 52 is used for supporting and fixing the sealing structure 51.

[0039] Specifically, the sealing assembly 50 comprises the sealing structure 51 and the support structure 52, the sealing structure 51 is mainly used for sealing the gap between the top end surface of the sleeve 10 and the sucker rod, and the support structure 52 is mainly used for supporting and fixing the sealing structure 51 to prevent the sealing structure from being displaced and causing sealing failure.

[0040] The conical sealing seat 511 is installed in the support structure 52, the conical sealing seat 511 is threadedly connected with the sealing compression cap 513, and the sealing rubber sleeve 512 installed in the conical sealing seat 511 is supported. The sealing compression cap 513 is threadedly connected with the conical sealing seat 511, the sealing compression cap 513 is tightened, the conical sealing rubber sleeve 512 is pressed in the conical inner cavity of the conical sealing seat 511, the conical sealing rubber sleeve 512 is deformed and tightly fitted with the smooth outer wall of the sucker rod, and sealing is achieved.

[0041] In a possible implementation, the support structure 52 comprises two slips 521 and a plurality of second fixing screws 522; the two slips 521 are symmetrically arranged, the inner wall of the first end of each slip 521 is fitted with the sucker rod, and the upper surface of the inner convex rib of the second end of each slip 521 is in contact with the bottom end surface of the conical sealing seat 511; each second fixing screw 522 is fixed through the two slips 521 respectively.

[0042] The outer surface of the first end of the conical sealing seat 511 is provided with a notch with the sucker rod as the axis of symmetry, and the two slips 521 are internally provided with notches corresponding to the notch of the conical sealing seat 511; the plurality of second fixed screws 522 are arranged in two layers, the second fixed screws 522 in the upper layer penetrate the two slips 521, and each second fixed screw 522 in the lower layer penetrates the corresponding notch of the conical sealing seat 511 and the slip 521 to limit the relative movement of the conical sealing seat 511 and the slip 521.

[0043] Specifically, the two slips 521 have a space inside, and when the two slips 521 are symmetrically buckled together, the sealing structure 51 can be clamped between the two slip internal spaces. In the buckled state, the inner wall of the first end of the double slip formed by the two slips 521 is attached to the outer surface of the sucker rod to achieve clamping of the sucker rod. The top end of the second end of the double slip has an inwardly protruding rib, and the upper surface of the rib is in contact with the bottom end surface of the conical sealing seat 511 to support the conical sealing seat 511. In addition, the double slip is fixed by the plurality of second fixed screws 522, and the plurality of second fixed screws 522 are arranged in two layers, the second fixed screws 522 in the upper layer penetrate the two slips 521, and each second fixed screw 522 in the lower layer penetrates the corresponding notch of the conical sealing seat 511 and each slip 521 to connect and fix the conical sealing seat 511 and the slip 521, and limit the relative movement between the conical sealing seat 511 and the slip 521.

[0044] In a possible implementation, the packing 30 is made of waste belts.

[0045] Specifically, the packing 30 used for sealing in the present application is made of waste high-strength material belts eliminated and replaced by motor of well site knocking machine. The on-site consumable cost is reduced, and when used for the first time, the recovered waste belts are spirally wound around the casing 10, and the end does not need to be cut.

[0046] In a possible implementation, the eccentric packing box body 23 has a hexagonal load-bearing structure for driving the eccentric packing box body 23 to rotate under the action of external force.

[0047] Specifically, the outer surface of the middle part of the eccentric packing box body 23 is a hexagonal load-bearing structure, the eccentric packing box body 23 can be manually rotated using a wrench, the load-bearing structure is convenient for clamping by the wrench, and thus the eccentric packing box body 23 is more easily driven to rotate under the action of the wrench.

[0048] In a possible implementation, the rotating packing advancing mechanism 40 further includes a plurality of handles 45, the plurality of handles 45 are respectively installed on the pressure cap 41 and the packing guide disc 43, and the handle 45 is used to make the pressure cap 41 and the packing guide disc 43 convenient for force rotation.

[0049] Specifically, the outer part of the pressure cap 41 is horizontally symmetrically provided with two handles 45, and the pressure cap 41 can be rotated and moved up and down by applying external force to the handles 45 on the pressure cap 41. The outer part of the packing lead-in disc 43 is also symmetrically welded with two handles 45, and the handles 45 welded on the outer surface of the packing lead-in disc 43 can make the eccentric packing box body 23 rotate and press the reserved waste belts into the annular accommodating cavity.

[0050] The utility model is installed at the well mouth pumping unit and the well mouth through taper thread, and operation is carried out according to normal technological process.

[0051] When the on-site pumping rod center line is inconsistent with the on-site well mouth pipeline center line, the first fixing screw 25 connecting and fixing the fixed flange 22 and the movable flange 24 can be loosened, so that the fixed flange 22 and the movable flange 24 no longer lock the lower end surface of the eccentric packing box body 23, the eccentric packing box body 23 is manually rotated by using a wrench, the movable flange 24 does not move with the fixed flange 22 connected with the on-site pipeline, the remaining parts rotate, the inner wall center line of the annular accommodating cavity of the eccentric packing box body 23 is consistent with the pumping rod center line, and the threaded connector 21 welded and installed on the lower end surface of the fixed flange 22 is consistent with the center line of the on-site well mouth pipeline, so that well mouth adaptation is completed, and the utility model is quick and convenient to use and has strong adaptability.

[0052] In addition, the packing 30 uses the waste belts of the on-site pumping unit, which reduces the on-site material cost, and when used for the first time, the recovered belts are spirally wound around the casing 10, the end reserved margin does not need to be cut, the margin belt is pulled out from the gap formed on the edge of the packing lead-in disc 43 in the rotating packing push-in mechanism 40, the pressure cap 41 is rotated, the pressure disc 42 can press the waste belts spirally wound in the eccentric packing box body 23, and the waste belts are tightly matched with the outer wall of the polished rod casing 10, so that sealing is completed. When the belts in the eccentric packing box body 23 are worn and the sealing effect is weakened, the pressure cap 41 is loosened, the handle 45 welded and installed on the outer surface of the packing lead-in disc 43 is rotated, the fixed pin 44 protruding from the lower end surface of the pressure disc 42 directly contacts the belt packing, the waste belts can be pushed to rotate, the belts reserved in the eccentric packing box body 23 are pulled into the annular accommodating cavity in advance, and the sealing element can be supplemented and reinforced in a short time of shutdown.

[0053] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high efficiency wellhead packing box device, characterized in that, The device comprises: a sleeve (10) sleeved on the outer surface of the sucker rod, the sleeve (10) being used for centralizing the sucker rod; an eccentric adjusting mechanism (20), the inner wall of the first end of the eccentric adjusting mechanism (20) being coaxially sleeved on the site wellhead, an annular accommodating cavity being formed between the inner wall of the second end of the eccentric adjusting mechanism (20) and the outer surface of the sleeve (10), the first end of the eccentric adjusting mechanism (20) being different in axis from the second end of the eccentric adjusting mechanism (20); a coil (30) installed in the annular accommodating cavity and spirally wound on the outer surface of the sleeve (10); a rotating coil advancing mechanism (40), the first end of the rotating coil advancing mechanism (40) being sleeved on the outer surface of the second end of the eccentric adjusting mechanism (20), the rotating coil advancing mechanism (40) being used for pressing the coil (30) against the second end of the eccentric adjusting mechanism (20); wherein, the coil (30) is left with a margin outside the annular accommodating cavity of the eccentric adjusting mechanism (20), the rotating coil advancing mechanism (40) being rotated under the action of external force, the coil (30) outside the annular accommodating cavity being gradually pressed into the annular accommodating cavity; the device further comprises: a sealing assembly (50), the inner wall of the first end of the sealing assembly (50) being fixedly connected with the top end of the sleeve (10), the inner part of the second end of the sealing assembly (50) being sealingly connected with the outer surface of the sucker rod, the sealing assembly (50) being used for preventing oil from leaking from the gap between the top end of the sleeve (10) and the sucker rod.

2. The high efficiency wellhead packing box device of claim 1, wherein, The eccentric adjusting mechanism (20) comprises: a threaded connector (21), the first end of the threaded connector (21) being sleeved on the site wellhead; a fixed flange (22), the fixed flange (22) being fixedly installed on the second end of the threaded connector (21); an eccentric coil box body (23), the eccentric coil box body (23) being arranged above the fixed flange (22), the first end of the eccentric coil box body (23) being provided with an outer edge, an annular accommodating cavity being formed between the inner wall of the second end of the eccentric coil box body (23) and the outer surface of the sleeve (10), the coil (30) being arranged in the annular accommodating cavity; a movable flange (24), the movable flange (24) being arranged above the fixed flange (22), the inner part of the movable flange (24) being provided with a clamping position, the clamping position being matched with the outer edge to limit the movement of the eccentric coil box body (23); a first fixed screw rod (25), the first fixed screw rod (25) penetrating through the fixed flange (22) and the movable flange (24).

3. The high efficiency wellhead packing box device of claim 2, wherein, The rotating coil advancing mechanism (40) comprises: a pressing cap (41), the inner wall of the first end of the pressing cap (41) being sleeved on the outer surface of the second end of the eccentric adjusting mechanism (20); a pressing disc (42), the pressing disc (42) being provided with a vertical through hole, the pressing disc (42) being located between the second end of the eccentric coil box body (23) and the inner end face of the second end of the pressing cap (41); a coil guide disc (43), the coil guide disc (43) being arranged above the pressing cap (41), the coil guide disc (43) being provided with a pin hole, the vertical through hole being matched with the pin hole. A fixed pin (44) connects the pressure disc (42) and the packing lead-in disc (43) through the pin hole and the vertical hole respectively; the bottom end surface of the fixed pin (44) is in contact with the top end of the packing (30) in the eccentric adjusting mechanism (20); Wherein, when the pressure cap (41) rotates and moves downward under the action of external force, it applies pressure to the pressure disc (42) to press the packing (30) in the eccentric adjusting mechanism (20); the packing lead-in disc (43) is provided with a notch at the edge, and the packing surplus outside the annular accommodating cavity is led out from the notch; when the packing lead-in disc (43) rotates under the action of external force, the packing surplus is gradually led into the annular accommodating cavity.

4. The high efficiency wellhead packing box device of claim 1, wherein, The sealing assembly (50) comprises a sealing structure (51), and the sealing structure (51) comprises: A conical sealing seat (511) is sealingly welded to the outer surface of the sleeve (10) at the first end inner wall, and a conical inner cavity is formed between the second end inner wall of the conical sealing seat (511) and the outer surface of the sucker rod; A sealing rubber sleeve (512) is arranged in the conical inner cavity, the outer surface of the sealing rubber sleeve (512) is tightly fitted with the conical inner cavity, and the inner wall of the sealing rubber sleeve (512) is tightly fitted with the outer surface of the sucker rod; A sealing pressure cap (513) is threadedly connected to the outer surface of the conical sealing seat (511) at the inner wall, and the inner end surface of the sealing pressure cap (513) is in contact with the top end surface of the sealing rubber sleeve (512); A support structure (52) is arranged outside the sealing structure (51), and the support structure (52) is used for supporting and fixing the sealing structure (51).

5. The high efficiency wellhead packing box device of claim 4, wherein, The support structure (52) comprises: Two slips (521) are symmetrically arranged, the inner wall of the first end of each slip (521) is fitted with the sucker rod, and the upper surface of the inner convex rib of the second end of each slip (521) is in contact with the bottom end surface of the conical sealing seat (511); A plurality of second fixed screws (522) are arranged respectively through the two slips (521); Wherein, the first end outer surface of the conical sealing seat (511) is provided with a notch with the sucker rod as the symmetry axis, the inner part of the two slips (521) is provided with a notch corresponding to the notch of the conical sealing seat (511); a plurality of second fixed screws (522) are arranged in two layers, the second fixed screws (522) in the upper layer penetrate through the two slips (521), and the second fixed screws (522) in the lower layer penetrate through the corresponding notches of the conical sealing seat (511) and the slip (521) respectively, so as to limit the relative movement of the conical sealing seat (511) and the slip (521).

6. The high efficiency wellhead packing box device of claim 1, wherein, The packing (30) is made of waste belts.

7. The high efficiency wellhead packing box device of claim 2, wherein, The eccentric packing box body (23) has a hexagonal load bearing structure, and the load bearing structure is used for driving the eccentric packing box body (23) to rotate under the action of external force.

8. The high efficiency wellhead packing box device of claim 3, wherein, The rotating packing root advancing mechanism (40) further comprises: A plurality of handles (45) are respectively arranged on the pressing cap (41) and the packing root guide-in disc (43), and the handles (45) are used for facilitating the rotation of the pressing cap (41) and the packing root guide-in disc (43) under force.

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