A six-in-one remote monitoring oil well polished rod intelligent sealing device

Abstract

The present invention relates to the technical field of oil well polished rod sealing, and discloses a six-in-one remote monitoring oil well polished rod intelligent sealing device, the device comprises a polished rod, a connector sleeved on the polished rod, a second pressure cap sleeved on the connector, and a lower joint screwed with the second pressure cap; wherein an inclined chamber is reserved between the second pressure cap and the lower joint; an inclined member is provided at one end of the connector, and the inclined member is located in the inclined chamber; an upper floating plate is provided on the second pressure cap, and a lower floating plate is provided on the lower joint, and the inclined member abuts against the upper floating plate and the lower floating plate respectively; the inclined member comprises an upper inclined ball arranged at one end of the connector, a lower inclined ball abutting against the upper inclined ball, and a rectangular spring sleeved on the polished rod; the inclined member in the device can drive the upper floating plate and the lower floating plate to deviate in any direction within the effective range of the chamber, so as to achieve an automatic following effect; and the automatic adjustment effect can be achieved without manually loosening or tightening the second pressure cap.

Description

Technical Field

[0001] The invention relates to the technical field of oil well polished rod sealing, in particular to a six-in-one remote monitoring oil well polished rod intelligent sealing device. Background Art

[0002] When pumping oil from an oil well, the pumping unit drives the bare rod, the sucker rod, and the oil pump to move up and down to pump oil. During the suction process of the existing pumping unit, the sealing of the pumping bare rod and the wellhead is a prominent problem. First, when the pumping bare rod works normally, the wellhead and the pumping unit donkey head are not concentric, causing serious wear of the bare rod sealing device and the bare rod, resulting in serious leakage of the sealing device. Second, due to insufficient downhole liquid supply, oil leaks out of the gap, causing dry grinding of the bare rod and the packing, and the heat of the bare rod causes serious wear of the packing. Third, since the liquid in the well contains corrosive chemical components, the bare rod breaks and falls into the well, and the bare rod sealer cannot seal, resulting in a blowout accident, causing serious pollution to the environment.

[0003] For example, the patent with publication number CN 116006115A discloses a composite limit-adjustment automatic pressurized packing box, including a packing box shell with a spring cavity threadedly connected at the upper end and a corner sliding body fixedly connected at the lower end; a displacement sliding body fixing cap is sleeved on the outside of the corner sliding body; the displacement sliding body fixing cap is threadedly connected to the base at the lower end, and a displacement-type semi-circular sphere is installed between the base and the corner sliding body; a pushing piston body is installed in the packing box shell, and a cavity is opened inward at the lower end of the pushing piston body, and a pushing piston body slide and a pushing piston body fixing plate are fixedly connected in the cavity, and the pushing piston body slide is placed on the upper part of the pushing piston body fixing plate; the lower part of the pushing piston body slide and the inner side of the pushing piston body fixing plate are embedded with an upper directional fixing plate; the inner cavity at the upper end of the packing box shell is threadedly connected to the spring cavity, and a spring is placed between the spring cavity and the upper end boss of the pushing piston body; the outside of the packing box shell is fixedly connected to two feed pipes.

[0004] In the above patent, the displacement type semi-sphere is used in conjunction with the corner sliding body, so that the corner sliding body can slide on the displacement type semi-sphere, thereby completing the adjustment of the light rod. However, there are still some problems with the above device. Since the displacement type semi-sphere is in direct contact with the corner sliding body, in order to ensure the stability of the device, when performing the adjustment work, it is necessary to manually adjust the displacement sliding body fixing cap to put it in a loose state, so that the displacement type semi-sphere can make spherical angular motion on the corner sliding body; when performing the adjustment in this way, it is necessary to manually adjust the displacement sliding body fixing cap, and the effect of automatic following and automatic adjustment cannot be achieved.

[0005] Therefore, how to make the light rod automatically follow the tilt swing is a problem to be solved at present. Summary of the invention

[0006] The present invention provides a six-in-one remote monitoring oil well polished rod intelligent sealing device to solve the above problems existing in the prior art.

[0007] A six-in-one remote monitoring oil well polished rod intelligent sealing device, comprising:

[0008] A polished rod, a connector sleeved on the polished rod, a second pressing cap sleeved on the connector, and a lower joint screwed to the second pressing cap;

[0009] An inclined chamber is reserved between the second pressure cap and the lower joint;

[0010] An inclined member is provided at one end of the connecting body, and the inclined member is located in the inclined chamber;

[0011] The second pressure cap is provided with an upper floating plate, the lower joint is provided with a lower floating plate, and the inclined member is respectively in contact with the upper floating plate and the lower floating plate;

[0012] The tilting member comprises an upper tilting ball arranged at one end of the connecting body, a lower tilting ball abutting against the upper tilting ball, and a rectangular spring sleeved on the polished rod;

[0013] The upper tilting ball and the lower tilting ball are both provided with grooves. When the upper tilting ball abuts against the lower tilting ball, the rectangular spring is located in the grooves in the upper tilting ball and the lower tilting ball, and the rectangular spring is in a deformed state, so that the upper tilting ball and the lower tilting ball abut against the upper floating plate and the lower floating plate respectively, thereby making the upper floating plate and the lower floating plate abut against the second pressure cap and the lower joint respectively; the upper tilting ball and the connector are integrally formed.

[0014] In a further embodiment, the lower joint is further provided with a lower connecting chamber, a second manual packing tightening nozzle provided on the second pressure cap, and a second manual packing tightening rod connected to the second manual packing tightening nozzle;

[0015] The polished rod passes through the lower joint, and there is a predetermined gap between the inner wall of the lower connecting chamber and the outer wall of the polished rod;

[0016] The surface of the tilting member has a predetermined curved surface, and the upper floating plate and the lower floating plate are both provided with an arc adapted to the tilting member;

[0017] A polytetrafluoroethylene sleeve is also provided between the lower tilting ball and the polished rod; the upper floating plate and the lower floating plate are respectively abutted against the second pressure cap and the lower joint by means of a rectangular spring, a second pressure cap and a direct threaded fit of the lower joint, and the upper floating plate and the lower floating plate can move with the movement of the tilting member.

[0018] In a further embodiment, along the direction from the lower floating plate to the upper floating plate, the polished rod is provided with a packing replacement blowout prevention unit, a polished rod breakage blowout prevention unit, a polished rod dry wear prevention unit and a manual-automatic integrated packing tightening unit in sequence.

[0019] In a further embodiment, the packing replacement blowout prevention unit comprises a blowout prevention seat sleeved on the polished rod and threadedly connected to the connector, the inner wall of the blowout prevention seat is further provided with an annular protrusion, and a second pressure ring sleeved on the polished rod;

[0020] The connector is provided with a placement cavity at one end close to the blowout preventer, and a spiral conical packing is provided in the placement cavity;

[0021] The second pressure ring is located between the spiral conical packing and the annular protrusion;

[0022] The blowout preventer is also provided with a first manual packing tightening nozzle, a first manual packing tightening rod connected with the first manual packing tightening nozzle, and a second manual packing tightening hole arranged on the connecting body.

[0023] In a further embodiment, the polished rod break-off blowout prevention unit comprises: a ball loading cavity and an upper chamber sequentially arranged on the blowout prevention seat along the direction from the lower floating plate to the upper floating plate, a break-off blowout prevention ball built into the ball loading cavity, and a strong magnetic block arranged in the upper chamber;

[0024] The figure corresponding to the cross-sectional view of the ball loading cavity is a rectangle, wherein a predetermined space exists between the broken-off anti-blowout ball and the polished rod, the inner wall of the ball loading cavity and the top of the ball loading cavity.

[0025] In a further embodiment, the polished rod anti-dry wear unit includes a grease nipple arranged on the anti-blowout seat, which is connected to the ball loading cavity and is used to fill lubricating oil into a predetermined space between the broken-off anti-blowout ball and the polished rod, the inner wall of the ball loading cavity and the top of the ball loading cavity.

[0026] In a further embodiment, the manual and automatic integrated packing unit comprises: a connecting and fixing cap connected to the blowout prevention seat, a packing seat sleeved on the polished rod and abutting against the strong magnetic block, the blowout prevention seat and the connecting and fixing cap, a fixing ring sleeved on the packing seat and abutting against the connecting and fixing cap, a first pressing cap screwed with the packing seat, a first packing is further provided between the packing seat and the polished rod, and a first pressing ring sleeved on the polished rod and abutting against the first packing and the first pressing cap respectively;

[0027] The first pressing cap is also provided with a first manual tightening packing hole;

[0028] The fixing ring and the connecting fixing cap are respectively provided with a first top screw and a second top screw.

[0029] In a further embodiment, the manual-automatic integrated packing unit further comprises: a crossbar disposed on the fixing ring, a vertical bar connected to the crossbar, a connecting sleeve disposed on the vertical bar, a worm gear transmission structure connected to the connecting sleeve, and a fixing key connected to the worm gear transmission structure;

[0030] The fixing key is provided with a tooth groove, and the fixing key is arranged on the first pressure cap;

[0031] The first packing has a certain wear resistance, which reduces the wear of the first packing when the polished rod moves in the axial direction thereof.

[0032] In a further embodiment, the worm gear transmission structure includes a motor, a second reducer provided at an output end of the motor, a first reducer connected to the second reducer, a coupling sleeve provided at an output end of the first reducer, a worm connected to the other end of the coupling sleeve, and a worm wheel connected to the worm;

[0033] The worm is also provided with a connecting flange and a positioning sleeve for connecting the connecting flange and the worm housing;

[0034] One end of the worm and the output end of the first reducer are connected to the coupling sleeve via a first positioning key and a second positioning key respectively;

[0035] The worm housing is also provided with a worm gear housing and a worm gear housing cover connected to the worm gear housing, and the worm gear is located in the worm gear housing;

[0036] The worm wheel is meshed with the tooth groove on the fixed key;

[0037] The gear teeth on the worm wheel mesh with the tooth grooves on the fixed key. The tooth grooves can be racks with a predetermined curvature or gear rings. The length of the gear teeth on the worm wheel is smaller than the length of the tooth grooves on the fixed key. When the worm wheel drives the fixed key to move, the gear teeth and the tooth grooves are always in a meshing state, ensuring that the position of the first packing can be adjusted.

[0038] In a further embodiment, the worm gear housing cover is further provided with: a visual detector, and a main control system connected to the visual detector;

[0039] The visual detector can take a picture of the oil output between the polished rod and the first pressure cap, and transmit the picture to the main control system. The operator can use the transmitted picture. When the oil output exceeds the expected value, the operator can operate the motor, so that the second reducer and the first reducer can work, and the worm rotates, thereby driving the worm wheel to move, and a relative displacement occurs between the worm wheel and the fixed key, so that the first pressure cap drives the first pressure ring to move, and the first pressure ring applies a predetermined thrust to the first packing to complete the tightening of the first packing.

[0040] Beneficial effect: The present invention discloses a six-in-one remote monitoring oil well polished rod intelligent sealing device. In order to enable the polished rod to automatically follow the tilting and swinging, a tilting piece is provided in the device, wherein the upper tilting ball and the connecting body are integrally formed. During installation, the rectangular spring is located between the upper tilting ball and the lower tilting ball, and then the lower joint is installed on the second pressing cap by means of a threaded connection. During this process, the rectangular spring is in a compressed state, and the upper tilting ball and the lower tilting ball can be respectively abutted against the upper floating plate and the lower floating plate. At this time, under the cooperation of the lower joint and the second pressing cap, a mechanism similar to a universal joint is formed between the tilting piece and the upper floating plate and the lower floating plate. Therefore, when the polished rod performs an arc swing on the donkey head of the oil pump, The tilting member swings along with the swing of the light rod in the second pressure cap, and the tilting member can move within a range along the movement trajectory of the light rod. At the same time, the tilting member is offset in any direction within the effective range of the tilting chamber with the cooperation of the floating plate, and at the same time, the tilting member drives the upper floating plate and the lower floating plate to offset in any direction within the effective range of the chamber, thereby achieving an automatic following effect; in this process, the automatic adjustment effect can be achieved without manually loosening or tightening the second pressure cap; through the above-mentioned structure, when the light rod swings in an arc on the donkey head of the oil pump, the light rod can automatically follow the tilting swing, thereby reducing the offset distance between the light rod and the wellhead, thereby reducing the squeezing of the first packing by the light rod and reducing the wear of the first packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a cross-sectional view of a six-in-one remote monitoring oil well polished rod intelligent sealing device;

[0042] Figure 2 It is a structural schematic diagram of a six-in-one remote monitoring oil well polished rod intelligent sealing device;

[0043] Figure 3 It is a schematic diagram of a six-in-one remote monitoring oil well polished rod intelligent sealing device;

[0044] Figure 4 It is a partial enlarged view of the automatic deflection adjustment, alignment and centering unit of the present invention;

[0045] Figure 5 is a state diagram of the polished rod translation of the present invention;

[0046] Figure 6 This is a diagram of the inclined state of the polished rod of the present invention;

[0047] Figure 7 This is a diagram of the translation and tilting state of the polished rod of the present invention;

[0048] Figure 8 It is a cross-sectional view of the worm gear transmission structure of the present invention.

[0049] Figure numerals: 1, bare rod; 2, first pressure cap; 3, first pressure ring; 4, worm gear housing cover; 5, worm gear housing; 6, worm gear; 7, packing seat; 8, first packing; 9, fixing ring; 10, first top screw; 11, connecting fixing cap; 12, strong magnetic block; 13, butter nozzle; 14, anti-blowout seat; 15, break-off anti-blowout ball; 16, second pressure ring; 17, spiral conical packing; 18, first manual packing tightening nozzle; 19, connector; 20, second pressure cap; 21, second manual packing tightening nozzle; 22, upper floating plate; 23, rectangular spring; 24, tilting member; 241, upper tilting ball; 242, lower tilting ball; 25, PTFE sleeve; 26. Lower floating plate; 27. Lower joint; 28. First manual tightening packing rod; 29. ​​Second manual tightening packing rod; 30. Second top screw; 31. Crossbar; 32. Vertical bar; 33. Connecting sleeve; 34. Fixing key; 35. Worm; 36. Worm housing; 37. Positioning sleeve; 38. Connecting flange; 39. Coupling sleeve; 40. First positioning key; 41. Second positioning key; 42. First reducer; 43. Second reducer; 44. Motor; 45. First manual tightening packing hole; 46. Ball cavity; 47. Second manual tightening packing hole; 48. Inclined chamber; 49. Lower connecting chamber; 50. Upper chamber; 51. Visual detector. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0053] The present invention discloses a six-in-one remote monitoring oil well polished rod intelligent sealing device, referring to Figure 1-Figure 8 ,include:

[0054] A bare rod 1, a connector 19 sleeved on the bare rod 1, a second pressure cap 20 sleeved on the connector 19, and a lower joint 27 screwed to the second pressure cap 20; wherein an inclined chamber 48 is reserved between the second pressure cap 20 and the lower joint 27; an inclined member 24 is provided at one end of the connector 19, and the inclined member 24 is located in the inclined chamber 48; an upper floating plate 22 is provided on the second pressure cap 20, and a lower floating plate 26 is provided on the lower joint 27, and the inclined member 24 abuts against the upper floating plate 22 and the lower floating plate 26 respectively; the inclined member 24 comprises an upper tilting ball 241 arranged at one end of the connecting body 19, a lower tilting ball 242 abutting against the upper tilting ball 241, and a rectangular spring 23 sleeved on the light rod 1; the upper tilting ball 241 and the lower tilting ball 242 are both provided with grooves, and when the upper tilting ball 241 abuts against the lower tilting ball 242, the rectangular spring 23 is located in the grooves of the upper tilting ball 241 and the lower tilting ball 242, and the rectangular spring 23 is in a deformed state, and the upper tilting ball 241 and the lower tilting ball 242 abut against the upper floating plate 22 and the lower floating plate 26 respectively;

[0055] During installation, by inserting the second manual tightening disk rod 29 into the second manual tightening disk nozzle 21 and applying driving force to the second manual tightening disk rod 29, relative displacement can occur between the second pressure cap 20 and the lower joint 27, so that the lower joint 27 is installed in the second pressure cap 20. During this process, the rectangular spring 23 located between the upper tilting ball 241 and the lower tilting ball 242 is in a compressed state. The compressed rectangular spring 23 can apply an elastic force to the lower tilting ball 242 away from the connecting body 19, so that the lower tilting ball 242 can abut against the lower floating plate 26, so that the tilting member 24 can abut against the upper floating plate 22 and the lower floating plate 26, completing the installation of the automatic deflection and centering unit.

[0056] In a further embodiment, there are corresponding adjustment mechanisms in the existing technology. Most of the existing adjustment mechanisms are achieved by directly connecting the displacement type semi-sphere with the corner sliding body, and by moving the corner sliding body on the displacement type semi-sphere, thereby adjusting the deviation of the light rod 1. In the above-mentioned connection method, the corner sliding body is located on the displacement type semi-sphere by screwing the displacement sliding body fixing cap and the packing box shell. Therefore, when performing the adjustment work, it is necessary to manually rotate the displacement sliding body fixing cap to make the displacement sliding body fixing cap in a loose state, and then the light rod 1 automatically performs the adjustment work.

[0057] In order to solve the above problems, the original corner sliding body is replaced with a tilting member 24 in the present device, and the tilting member 24 includes: an upper tilting ball 241 integrally formed with the connecting body 19, a lower tilting ball 242 abutting against the upper tilting ball 241, and a rectangular spring 23 located between the upper tilting ball 241 and the lower tilting ball 242. In normal operation, the rectangular spring 23 can ensure that the lower tilting ball 242 abuts against the lower floating plate 26 to ensure the stability of the device. When the light rod 1 translates or tilts, the rectangular spring 23 can translate or tilt the light rod 1 by changing its deformation, and there is no need to manually loosen the second pressure cap 20, and the light rod 1 can automatically follow and automatically adjust the deviation. At the same time, the tilting member 24 in the present device is 38CrMoAl, that is, high-grade nitrogen The upper floating plate 22 and the lower floating plate 26 are made of special high-strength wear-resistant sealing material. Because they contain graphite, they are relatively smooth. The friction between the two is small, and the movement of the light rod 1 can be driven by the movement of the light rod 1. Therefore, in the adjustment process, there is no need to loosen the second pressure cap 20 to complete the adjustment of the tilting member 24. No manual operation is required. The tilting member 24 can achieve the effect of automatically following the light rod 1 or automatically correcting the deviation, avoiding manual adjustment. At the same time, it also changes the stress state of the spiral conical packing 17, making its sealing more reliable and extending the service life of the first packing 8; the tilting member 24 can swing in any direction between the lower floating plate 26 and the upper floating plate 22, and the maximum swing angle is 9°, which greatly increases the moving distance of the light rod 1.

[0058] In a further embodiment, since the upper floating plate 22, the lower floating plate 26 and the tilting member 24 form a structure similar to a universal joint, during the tilting process of the light rod 1, friction will occur between the tilting member 24 and the upper floating plate 22 and the lower floating plate 26. When one or more of the upper floating plate 22, the lower floating plate 26 and the tilting member 24 are worn, the guiding work will fail.

[0059] In order to solve the above problem, a rectangular spring 23 in a compressed state is set in the present device. When the upper floating plate 22, the lower floating plate 26 and the tilting member 24 are worn, the rectangular spring 23 can ensure that the upper tilting ball 241 and the lower tilting ball 242 are respectively in contact with the upper floating plate 22 and the lower floating plate 26, thereby achieving an automatic compensation effect, making the sealing more reliable. When the upper floating plate 22, the lower floating plate 26 and the tilting member 24 are worn, the present device can still continue to be used.

[0060] The lower joint 27 is also provided with a lower connecting chamber 49, a second manual tightening packing nozzle 21 provided on the second pressure cap 20, and a second manual tightening packing rod 29 connected to the second manual tightening packing nozzle 21; the light rod 1 passes through the lower joint 27, and there is a predetermined gap between the inner wall of the lower connecting chamber 49 and the outer wall of the light rod 1; the surface of the inclined member 24 has a predetermined curved surface, and the upper floating plate 22 and the lower floating plate 26 are both provided with an arc adapted to the inclined member 24; a polytetrafluoroethylene sleeve 25 is also provided between the lower inclined ball 242 and the light rod 1; by inserting the second manual tightening packing rod 29 into the second manual tightening packing nozzle 21, by applying to the first The second manual tightening disk root rod 29 generates a driving force, which can cause the lower joint 27 and the second pressure cap 20 bracket to be relatively displaced, thereby completing the installation of the lower joint 27, and at the same time, the upper tilting ball 241 and the lower tilting ball 242 can be abutted to form an integrated tilting member 24. Therefore, when the light rod 1 is offset, since the surface of the tilting member 24 has a predetermined curved surface and the upper floating plate 22 and the lower floating plate 26 are provided with an arc, the tilting member 24 and the upper floating plate 22 and the lower floating plate 26 can rotate relative to each other, so that the tilting member 24 can move with the displacement of the light rod 1, and there is no need to manually adjust the second pressure cap 20, and the device itself can perform automatic adjustment.

[0061] Along the direction from the lower floating plate 26 to the upper floating plate 22, the bare rod 1 is provided with a packing replacement blowout prevention unit, a bare rod breakage blowout prevention unit, a bare rod dry wear prevention unit and a manual-automatic integrated packing tightening unit in sequence; wherein in the present device, the packing replacement blowout prevention unit, the bare rod breakage blowout prevention unit and the bare rod dry wear prevention unit are integrated in the blowout prevention seat 14, thereby reducing the length of the entire sealing device. By shortening the length of the sealing device, the length of the bare rod 1 is also shortened, not only the weight of the device is lighter, but also the amount of material used becomes less, and the wear of the bare rod 1 can also be reduced, and when the land sinks or the wellhead deviates, the deformation of the bare rod 1 is also smaller, thereby reducing the wear of the bare rod 1 or the packing.

[0062] The packing replacement blowout prevention unit comprises a blowout prevention seat 14 which is sleeved on the polished rod 1 and screwed to the connecting body 19, the inner wall of the blowout prevention seat 14 is also provided with an annular protrusion, and a second pressure ring 16 which is sleeved on the polished rod 1; the connecting body 19 is provided with a placement cavity at one end close to the blowout prevention seat 14, and a spiral conical packing 17 is provided in the placement cavity; wherein the second pressure ring 16 is located between the spiral conical packing 17 and the annular protrusion; the blowout prevention seat 14 is also provided with a first manual packing tightening nozzle 18, a first manual packing tightening rod 28 connected to the first manual packing tightening nozzle 18, and a second manual packing tightening hole 47 provided on the connecting body 19; when it is necessary to replace the packing, the operator The operator needs to insert the first manual tightening packing rod 28 into the first manual tightening packing mouth 18, and then drive the first manual tightening packing rod 28 to rotate the blowout preventer 14 and the connector 19, so that the annular protrusion in the moving blowout preventer 14 can apply a pressure in the direction of the spiral conical packing 17 to the second pressure ring 16, so that the spiral conical packing 17 moves toward the connector 19, thereby reducing the gap between the spiral conical packing 17 and the bare rod 1, avoiding oil spraying during the replacement of the first packing 8, and then the operator can insert the packing rod into the first manual tightening packing hole 45, and drive the packing rod to move the first pressure cap 2 away from the packing seat 7, so that the operator can replace the first packing 8.

[0063] The polished rod breaking and blowout prevention unit comprises: a ball-loading cavity 46 and an upper cavity 50 which are sequentially arranged on the blowout prevention seat 14 in the direction away from the lower floating plate 26 to the upper floating plate 22, a breaking and blowout prevention ball 15 built into the ball-loading cavity 46, and a strong magnetic block 12 arranged in the upper cavity 50; the figure corresponding to the cross-sectional view of the ball-loading cavity 46 is a rectangle, wherein there is a predetermined space between the breaking and blowout prevention ball 15 and the polished rod 1, the inner wall of the ball-loading cavity 46 and the top of the ball-loading cavity 46; the strong magnetic block 12 has a large magnetism, which can Attraction is performed. After the polished rod 1 is broken off, the strong magnetic block 12 can suck the broken-off anti-blowout ball 15 into the channel where the polished rod 1 is located under the axial suction force of the magnetic block, and then the channel between the ball loading cavity 46 and the upper chamber 50 can be blocked under the cooperation of the oil pressure and magnetic force in the well. The channel is close to the broken-off anti-blowout ball 15 and has an arc surface adapted to the broken-off anti-blowout ball 15. Therefore, when the pressure in the oil well is higher, the sealing force between the broken-off anti-blowout ball 15 and the channel is greater, and the sealing is more reliable, thereby preventing blowout when the polished rod 1 is broken off and reducing environmental pollution.

[0064] In a further embodiment, there is also a mechanism for preventing blowout when the polished rod is disconnected in the existing oil well polished rod. Most of the existing mechanisms are divided into two categories. In one category, the cross-sectional view of the ball-loading cavity 46 corresponds to an arch structure. Therefore, when the polished rod 1 is disconnected, the anti-blowout ball 15 needs to move from the bottom of the arch to the top of the arch, and its movement distance is relatively long, resulting in the oil being sprayed out during the movement of the anti-blowout ball 15, thereby causing the failure of the blowout prevention work. The other mechanism for preventing blowout when the polished rod is disconnected is the same as the present device, both of which use an annular ball-loading cavity 46, but a spring limit mechanism is also provided on the blowout prevention seat 14, and the mechanism can be applied by setting the spring limit mechanism. A force is applied to the break-off anti-blowout ball 15 in the direction of the polished rod 1, so that when the polished rod 1 is broken off, the break-off anti-blowout ball 15 can be pushed into the channel where the polished rod 1 is located with the cooperation of the spring limiting mechanism, and then the channel between the ball loading cavity 46 and the upper chamber 50 can be blocked with the cooperation of the oil pressure and magnetic force in the well. However, when the polished rod 1 is not broken off, this method will cause the polished rod 1 and the break-off anti-blowout ball 15 to be in contact with each other due to the existence of the spring limiting mechanism. Therefore, during the up and down movement of the polished rod 1, the break-off anti-blowout ball 15 will damage the polished rod 1, which will make it difficult for the packing to seal the polished rod 1, resulting in poor sealing effect and increased oil leakage.

[0065] In order to solve the above problems, an annular protrusion is provided on the inner wall of the blowout prevention seat 14 of the device, and at the same time, there is a 0.5 mm gap between the break-off blowout prevention ball 15 and the inner wall of the polished rod 1 and the ball-loading cavity 46, and there is a 1 mm gap between it and the top of the ball-loading cavity 46. The grease nozzle 13 is provided to fill the above gap with lubricating oil, so that the friction between the polished rod 1 and the break-off blowout prevention ball 15 can be reduced during the movement of the polished rod 1, thereby avoiding damage to the polished rod 1. At the same time, during the movement of the polished rod 1, lubricating oil can adhere to its surface, reducing friction between it and the packing, thereby avoiding damage to the packing. At the same time, by specifying the extension length of the annular protrusion, when the polished rod 1 is broken off, the break-off blowout prevention ball 15 can be located in the channel where the polished rod 1 is located under its own gravity and the suction of the strong magnetic block 12, and then With the cooperation of the strong magnetic block 12 and the oil pressure, the passage between the ball-loading cavity 46 and the upper chamber 50 can be blocked, and the higher the pressure in the oil well, the greater the sealing force between the break-off anti-blowout ball 15 and the passage, and the more reliable the sealing, thereby preventing the blowout when the polished rod 1 is broken off, and reducing environmental pollution. In a further embodiment, the diameter of the ball-loading cavity 46 is the diameter of the polished rod 1 plus the diameter of the break-off anti-blowout ball 15 plus two millimeters, and at this time the distance between the bottom of the cross-sectional view of the ball-loading cavity 46 and the surface of the polished rod 1 is two millimeters greater than the diameter of the break-off anti-blowout ball 15; that is, when the diameter of the polished rod 1 is twenty-five millimeters, the diameter of the break-off anti-blowout ball 15 is thirty millimeters, and then the diameter of the ball-loading cavity 46 is twenty-five plus thirty plus two millimeters, which is fifty-seven millimeters.

[0066] The polished rod anti-dry wear unit includes a grease nipple 13 arranged on the anti-blowout seat 14, and the grease nipple 13 is connected to the ball loading cavity 46, and is used to fill lubricating oil into a predetermined space between the broken-off anti-blowout ball 15 and the polished rod 1, the inner wall of the ball loading cavity 46 and the top of the ball loading cavity 46; by connecting the grease nipple 13 with the ball loading cavity 46, the lubricating oil can be injected into the ball loading cavity 46 through the grease nipple 13, and since there is a 0.5 mm gap between the broken-off anti-blowout ball 15 and the polished rod 1 and the inner wall of the ball loading cavity 46, the lubricating oil can be filled into the gap, and the provided lubricating oil can reduce the friction between the polished rod 1 and the broken-off anti-blowout ball 15, so as to avoid the polished rod 1 from being dry-worn due to insufficient downhole liquid when the sucker rod is dry-worn due to the lubricating oil; the present invention integrates the polished rod broken-off anti-blowout unit and the polished rod anti-dry wear unit into one space, effectively combines them, saves space, reduces costs, and makes the equipment more lightweight.

[0067] The manual and automatic integrated packing unit comprises: a connecting and fixing cap 11 connected to the blowout prevention seat 14, a packing seat 7 sleeved on the polished rod 1 and abutting against the strong magnetic block 12, the blowout prevention seat 14 and the connecting and fixing cap 11, a fixing ring 9 sleeved on the packing seat 7 and abutting against the connecting and fixing cap 11, a first pressing cap 2 screwed to the packing seat 7, a first packing 8 is further provided between the packing seat 7 and the polished rod 1, and a first pressing ring 3 sleeved on the polished rod 1 and abutting against the first packing 8 and the first pressing cap 2 respectively; A first manual tightening packing hole 45 is also provided on the first pressure cap 2; a first top screw 10 and a second top screw 30 are respectively provided on the fixing ring 9 and the connecting fixing cap 11; the connecting fixing cap 11 is screwed with the blowout preventer seat 14, and a first extension piece extending in the direction of the connecting fixing cap 11 is provided on the curved surface of the packing seat 7, and a second extension piece extending in the direction of the packing seat 7 is provided at one end of the connecting fixing cap 11. By screwing the first extension piece, the second extension piece and the connecting fixing cap 11 with the blowout preventer seat 14, the installation of the packing seat 7 is completed.

[0068] The manual and automatic integrated tightening packing unit also includes: a cross bar 31 arranged on the fixing ring 9, a vertical bar 32 connected to the cross bar 31, a connecting sleeve 33 arranged on the vertical bar 32, a worm gear transmission structure connected to the connecting sleeve 33, and a fixing key 34 connected to the worm gear transmission structure; the fixing key 34 is provided with a tooth groove, and the fixing key 34 is arranged on the first pressure cap 2; the worm gear transmission structure includes a motor 44, a second reducer 43 arranged at the output end of the motor 44, and a second reducer 43 connected to the second reducer 43. The first reducer 42 connected to the first reducer 42 is provided with a coupling sleeve 39 at the output end of the first reducer 42, a worm 35 connected to the other end of the coupling sleeve 39, and a worm wheel 6 connected to the worm 35; the worm 35 is also provided with a connecting flange 38, and a positioning sleeve 37 for connecting the connecting flange 38 and the worm housing 36; one end of the worm 35 and the output end of the first reducer 42 are connected to the coupling sleeve 39 through a first positioning key 40 and a second positioning member respectively; the worm housing 36 is also provided with a worm wheel housing 5, and a worm wheel housing 5 is connected to the worm wheel housing 36. The worm gear box cover 4 is connected to the body 5, and the worm gear 6 is located in the worm gear box 5; the worm gear 6 is meshed with the tooth groove on the fixed key 34; when the visual detector 51 detects oil leakage between the polished rod 1 and the first pressure cap 2, the motor 44 starts to work, and the moving motor 44 can drive the second reducer 43 to rotate, and then the moving second reducer 43 can drive the first reducer 42 to start working, and the moving first reducer 42 can drive the coupling sleeve 39 to rotate through the set second positioning key 41, and then the rotating coupling sleeve 39 is set The first positioning key 40 drives the worm 35 to move. Since the worm 35 is connected to the worm wheel 6, when the worm 35 rotates, it can drive the worm wheel 6 to rotate, and then the moving worm wheel 6 can drive the first pressure cap 2 to rotate through the set fixed key 34, so that the first pressure cap 2 and the packing seat 7 are relatively displaced, so as to adjust the position between the first pressure cap 2 and the packing seat 7, and the moving first pressure cap 2 can drive the first pressure ring 3 to move, and the moving first pressure ring 3 can tighten the first packing 8 to reduce oil leakage when the light rod 1 moves.

[0069] The worm gear housing cover 4 is also provided with: a visual detector 51, and a main control system connected to the visual detector 51; the visual detector 51 can take a picture of the oil output between the polished rod 1 and the first pressure cap 2, and transmit the picture to the main control system. The operator can use the transmitted picture to determine that when the oil output exceeds the expected value, the operator can make the motor 44 work; and then the manual and automatic integrated tightening packing unit can start working, so that not only the oil leakage of the polished rod 1 can be remotely monitored, but also the remote tightening packing work can be completed to reduce oil leakage of the device.

[0070] In a further embodiment, by connecting a mobile phone to the main control system, the main control system can be driven remotely through the mobile phone, thereby matching with the visual detector 51 to view the on-site wellhead conditions in real time, and the packing tightening work can also be completed remotely, thereby reducing production costs and having good economic benefits.

[0071] In a further embodiment, the device can be divided into two modes when working, namely manual mode and automatic mode. When the device is in manual mode, the motor 44 can complete the packing tightening work according to the operator's operation and the set torque, while in automatic mode, the control time can be pre-set, and after the preset time is reached, the motor 44 can complete the packing tightening work.

[0072] Working principle description: During installation, by inserting the second manual tightening disk rod 29 into the second manual tightening disk nozzle 21 and applying driving force to the second manual tightening disk rod 29, relative displacement can occur between the second pressing cap 20 and the lower joint 27, so that the lower joint 27 is installed in the second pressing cap 20. During this process, the rectangular spring 23 located between the upper tilting ball 241 and the lower tilting ball 242 is in a compressed state. The compressed rectangular spring 23 can apply an elastic force to the lower tilting ball 242 away from the connecting body 19, so that the lower tilting ball 242 can abut against the lower floating plate 26, so that the tilting member 24 can abut against the upper floating plate 22 and the lower floating plate 26, completing the installation of the automatic deflection and centering unit; when the light rod 1 is in When the pumping unit head performs an arc swing, the tilting member 24 is caused to swing along with the swing of the light rod 1 in the second pressure cap 20, and the tilting member 24 can move within the range along the motion trajectory of the light rod 1, and at the same time, the tilting member 24 is offset in any direction within the effective range of the tilting chamber 48 with the cooperation of the floating plate, and at the same time, the tilting member 24 drives the upper floating plate 22 and the lower floating plate 26 to offset in any direction within the effective range of the chamber, thereby achieving an automatic following effect; wherein the movement mode of the packing replacement blowout prevention unit is that when the packing replacement work is required, the operator needs to insert the first manual packing tightening rod 28 into the first manual packing tightening nozzle 18, and then drive the first manual packing tightening rod 28 to rotate the blowout prevention seat 14 and the connector 19, thereby moving The annular protrusion in the anti-blowout seat 14 can apply a pressure to the second pressure ring 16 in the direction of the spiral conical packing 17, so that the spiral conical packing 17 moves toward the connecting body 19, thereby reducing the gap between the spiral conical packing 17 and the polished rod 1, avoiding oil spraying during the replacement of the first packing 8, and then the operator can insert the packing rod into the first manual tightening packing hole 45, and drive the packing rod to make the first pressure cap 2 away from the packing seat 7, so that the operator can replace the first packing 8; when the polished rod 1 is broken off, since the strong magnetic block 12 has a large magnetism, it can attract the broken anti-blowout ball 15. Therefore, after the polished rod 1 is broken off, the strong magnetic block 12 can absorb the broken anti-blowout ball 15 under the axial suction of the magnetic block. The ball 46 is inserted into the channel where the polished rod 1 is located, and then the channel between the ball chamber 46 and the upper chamber 50 can be blocked under the cooperation of the oil pressure and magnetic force in the well. The channel is close to the anti-blowout ball 15 and has an arc surface adapted to the anti-blowout ball 15. Therefore, when the pressure in the oil well is higher, the sealing force between the anti-blowout ball 15 and the channel is greater, and the sealing is more reliable, thereby preventing the blowout when the polished rod 1 is broken and reducing environmental pollution; at the same time, when the manual and automatic integrated packing unit is working, the visual detector 51 therein can take a picture of the oil output between the polished rod 1 and the first pressure cap 2, and transmit the picture to the main control system. The operator can use the transmitted picture. When the oil output exceeds the expected value, the operator makes the motor 44 work;When the motor 44 starts to work, the moving motor 44 can drive the second reducer 43 to rotate, and then the moving second reducer 43 can drive the first reducer 42 to start working. The moving first reducer 42 can drive the coupling sleeve 39 to rotate through the set second positioning key 41, and then the rotating coupling sleeve 39 drives the worm 35 to move through the set first positioning key 40. Since the worm 35 is connected to the worm wheel 6, when the worm 35 rotates, it can drive the worm wheel 6 to rotate, and then the moving worm wheel 6 can drive the first pressing cap 2 to rotate through the set fixing key 34, so that the first pressing cap 2 and the packing seat 7 are relatively displaced, so as to adjust the position between the first pressing cap 2 and the packing seat 7, and the moving first pressing cap 2 can drive the first pressing ring 3 to move, and the moving first pressing ring 3 can tighten the first packing 8 to reduce the oil leakage when the light rod 1 moves. ;

[0073] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A six-in-one remote monitoring oil well polished rod intelligent sealing device, characterized in that: include: A polished rod (1), a connecting body (19) sleeved on the polished rod (1), a second pressing cap (20) sleeved on the connecting body (19), and a lower joint (27) threadedly connected to the second pressing cap (20); An inclined chamber (48) is reserved between the second pressure cap (20) and the lower joint (27); An inclined member (24) is provided at one end of the connecting body (19), and the inclined member (24) is located in the inclined chamber (48); An upper floating plate (22) is provided on the second pressing cap (20), a lower floating plate (26) is provided on the lower joint (27), and the inclined member (24) abuts against the upper floating plate (22) and the lower floating plate (26) respectively; The tilting member (24) comprises an upper tilting ball (241) arranged at one end of the connecting body (19), a lower tilting ball (242) abutting against the upper tilting ball (241), and a rectangular spring (23) sleeved on the polished rod (1); The upper tilting ball (241) and the lower tilting ball (242) are both provided with grooves. When the upper tilting ball (241) and the lower tilting ball (242) are in contact, the rectangular spring (23) is located in the grooves of the upper tilting ball (241) and the lower tilting ball (242). The rectangular spring (23) is in a compressed state, so that the upper tilting ball (241) and the lower tilting ball (242) are respectively in contact with the upper floating plate (22) and the lower floating plate (26), thereby causing the upper floating plate (22) and the lower floating plate (26) to respectively contact with the second pressure cap (20) and the lower joint (27); Along the direction from the lower floating plate (26) to the upper floating plate (22), the polished rod (1) is provided with a packing replacement blowout prevention unit, a polished rod breakage blowout prevention unit, a polished rod dry wear prevention unit and a manual and automatic integrated packing tightening unit in sequence.

2. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 1 is characterized in that: The lower joint (27) is also provided with a lower connecting chamber (49), a second manual packing tightening nozzle (21) provided on the second pressure cap (20), and a second manual packing tightening rod (29) connected to the second manual packing tightening nozzle (21); The polished rod (1) passes through the lower joint (27), and a predetermined gap exists between the inner wall of the lower connecting chamber (49) and the outer wall of the polished rod (1); The surface of the tilting member (24) has a predetermined curved surface, and the upper floating plate (22) and the lower floating plate (26) are both provided with an arc that matches the tilting member (24); A polytetrafluoroethylene sleeve (25) is also provided between the lower inclined ball (242) and the polished rod (1).

3. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 1 is characterized in that: The packing replacement blowout prevention unit comprises a blowout prevention seat (14) sleeved on the polished rod (1) and threadedly connected to the connecting body (19), the inner wall of the blowout prevention seat (14) further comprising an annular protrusion, and a second pressure ring (16) sleeved on the polished rod (1); The connector (19) is provided with a placement cavity at one end close to the blowout preventer seat (14), and a spiral conical packing (17) is arranged in the placement cavity; The second pressure ring (16) is located between the spiral conical packing (17) and the annular protrusion; The blowout preventer seat (14) is also provided with a first manual packing tightening nozzle (18), a first manual packing tightening rod (28) connected to the first manual packing tightening nozzle (18), and a second manual packing tightening hole (47) provided on the connecting body (19).

4. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 1 is characterized in that: The polished rod break-off blowout prevention unit comprises: a ball loading cavity (46) and an upper cavity (50) arranged on the blowout prevention seat (14) in sequence along the direction from the lower floating plate (26) to the upper floating plate (22), a break-off blowout prevention ball (15) built into the ball loading cavity (46), and a strong magnetic block (12) arranged in the upper cavity (50); The figure corresponding to the cross-sectional view of the ball loading cavity (46) is a rectangle, wherein a predetermined space exists between the break-off anti-blowout ball (15) and the polished rod (1), the inner wall of the ball loading cavity (46) and the top of the ball loading cavity (46).

5. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 4 is characterized in that: The polished rod anti-dry wear unit comprises a grease nipple (13) arranged on the anti-blowout seat (14), the grease nipple (13) being in communication with the ball loading cavity (46) and being used for filling lubricating oil into a predetermined space between the anti-blowout ball (15) and the polished rod (1), the inner wall of the ball loading cavity (46) and the top of the ball loading cavity (46).

6. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 4 is characterized in that: The manual-automatic integrated packing unit comprises: a connecting fixing cap (11) connected to the blowout prevention seat (14), a packing seat (7) sleeved on the polished rod (1) and abutting against the strong magnetic block (12), the blowout prevention seat (14) and the connecting fixing cap (11), a fixing ring (9) sleeved on the packing seat (7) and abutting against the connecting fixing cap (11), a first pressing cap (2) screwed to the packing seat (7), a first packing (8) being provided between the packing seat (7) and the polished rod (1), and a first pressing ring (3) sleeved on the polished rod (1) and abutting against the first packing (8) and the first pressing cap (2) respectively; The first pressing cap (2) is also provided with a first manual tightening packing hole (45); The fixing ring (9) and the connecting fixing cap (11) are respectively provided with a first top screw (10) and a second top screw (30).

7. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 6 is characterized by: The manual-automatic integrated packing unit further comprises: a crossbar (31) arranged on the fixing ring (9), a vertical bar (32) connected to the crossbar (31), a connecting sleeve (33) arranged on the vertical bar (32), a worm gear transmission structure connected to the connecting sleeve (33), and a fixing key (34) connected to the worm gear transmission structure; The fixing key (34) is provided with a tooth groove, and the fixing key (34) is arranged on the first pressing cap (2).

8. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 7 is characterized in that: The worm gear transmission structure comprises a motor (44), a second reducer (43) provided at an output end of the motor (44), a first reducer (42) connected to the second reducer (43), a coupling sleeve (39) provided at the output end of the first reducer (42), a worm (35) connected to the other end of the coupling sleeve (39), and a worm wheel (6) connected to the worm (35); The worm (35) is also provided with a connecting flange (38) and a positioning sleeve (37) for connecting the connecting flange (38) and the worm housing (36); One end of the worm (35) and the output end of the first reducer (42) are connected to the coupling sleeve (39) via a first positioning key (40) and a second positioning key (41), respectively; The worm housing (36) is also provided with a worm gear housing (5) and a worm gear housing cover (4) connected to the worm gear housing (5), and the worm gear (6) is located in the worm gear housing (5); The worm wheel (6) meshes with the tooth grooves on the fixed key (34).

9. The six-in-one remote monitoring oil well polished rod intelligent sealing device according to claim 8, characterized in that: The worm gear housing cover (4) is also provided with: a visual detector (51) and a main control system connected to the visual detector (51).

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