CN213175577U - Oil well packing box for centralizing large-diameter polished rod - Google Patents
Oil well packing box for centralizing large-diameter polished rod Download PDFInfo
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- CN213175577U CN213175577U CN202021661491.1U CN202021661491U CN213175577U CN 213175577 U CN213175577 U CN 213175577U CN 202021661491 U CN202021661491 U CN 202021661491U CN 213175577 U CN213175577 U CN 213175577U
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- centralizing
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- oil well
- centering
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Abstract
The utility model provides an oil well packing box for major diameter polished rod is right, including packing box upper gland, last packing gland, one-level packing box, lower packing gland, second grade packing box and right device, right the device including right the top board, right holding down plate and activity dish, right the bottom of holding down plate and link to each other with the well head, the activity dish is arranged in the centre of right the top board and right the holding down plate, right the top board and pass through the bolt with the both sides of right the holding down plate and link to each other, activity dish, second grade packing box, one-level packing box and the equal overcoat of packing box upper cover connects gradually in the polished rod, and during one-level packing box top inner chamber was located to the packing root gland, the lower packing root gland was located in the second grade packing box top inner chamber. The utility model discloses extension packing life improves oil well sealing performance, reduces workman intensity of labour, guarantees beam-pumping unit production and equipment even running and reduces the emergence of safety ring protects the accident.
Description
Technical Field
The utility model belongs to the technical field of oil well packing box, especially, relate to an oil well packing box for major diameter polished rod is right.
Background
At present, in the sucker-rod pump oil extraction process, a packing box is usually adopted to seal an optical rod so as to reduce the environmental pollution caused by oil gas leakage and the waste of energy. According to the difference of oil well load size, the diameter of the common polish rod is phi 25mm and phi 28mm, and the polish rod with the diameter of more than phi 28mm is adopted for oil extraction in a deep well and an oil well with larger oil well load, such as the polish rod with the diameter of phi 38 mm. The existing polish rod packing box with the diameter of phi 28mm or less can basically meet the requirements of oil well sealing, polish rod centralizing and well control, and the packing box matched with a large-diameter polish rod such as a polish rod with the diameter of phi 38mm has the problems of poor well head sealing performance, short packing using period, incapability of correcting deviation, serious polish rod abrasion, incapability of meeting the well control requirement and the like under the conditions of high well control requirement and non-centering of a well head, so that the normal production of an oil well is influenced, the oil production rate of the oil well is reduced, the labor intensity of workers is increased, and safety risks are brought to the production and equipment of an oil pumping unit.
Disclosure of Invention
The utility model aims to solve the technical problem that the problem that exists lies in to the aforesaid, the utility model provides an oil well packing box that is used for major diameter polished rod to right, through optimizing the interior cavity structure of packing box, upper and lower two-stage packing box screw thread sealing type and increase a righting device at the packing lower extreme, make the packing box can satisfy the well control requirement, can realize the packing box function of rectifying again, simultaneously will resist oil, heat-resisting, the better flat area of wearability replaces rubber "O" type sealing washer packing as the packing, reach extension packing life, improve oil well sealing performance, reduce workman intensity of labour, guarantee beam-pumping unit production and equipment even running and reduce the emergence of safety ring protects the accident.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: an oil well packing box for centralizing a large-diameter polished rod is characterized by comprising an upper packing box gland, an upper packing gland, a primary packing box, a lower packing gland, a secondary packing box and a centralizing device, wherein the centralizing device comprises a centralizing upper press plate, a centralizing lower press plate and a movable disk, the bottom of the centralizing lower press plate is connected with a well head, the movable disk is arranged at the central position of the top of the centralizing lower press plate, the centralizing upper press plate is arranged at the top of the movable disk, the centralizing upper press plate is connected with the two sides of the centralizing lower press plate through bolts, the movable disk, the secondary packing box, the primary packing box and the upper packing box cover are all sleeved outside the polished rod and are sequentially connected, the bottom of the secondary packing box is connected with the top of the movable disk, the top of the secondary packing box is connected with the bottom of the primary packing box, the top of the primary packing box is connected with the upper packing box cover, the upper packing, the lower packing gland is arranged in an inner cavity at the top of the second-stage packing box.
According to the scheme, a sealing notch is formed in the contact surface of the righting lower pressing plate and the movable disc, and an O-shaped sealing ring is embedded in the sealing notch.
According to the scheme, lubricating grease is coated in the inner cavities of the first-level packing box and the second-level packing box, and a flat strip is coiled along the polished rod.
According to the scheme, the top of the second-level packing box is in threaded connection with the first-level packing box through the oil pipe buckle, and the second-level packing box is in threaded connection with the movable disc.
According to the scheme, the top of the second-level packing box and the top of the first-level packing box are both provided with external threads, and the bottom of the second-level packing box and the top of the first-level packing box are both provided with internal threads.
According to the scheme, the movable disc is composed of a bottom disc and a top sleeve, the bottom disc is arranged between the righting lower pressing plate and the righting upper pressing plate, and the outer wall of the top sleeve is provided with external threads which are matched and connected with the internal threads at the bottom of the secondary packing box in a threaded mode.
According to the scheme, the diameters of the inner cavities of the first-stage packing box and the second-stage packing box are 60-70 mm, and the depths of the inner cavities are 95-105 mm.
According to the scheme, the distance between the inner wall of the righting upper pressure plate and the top sleeve of the movable disc is 20-25 mm.
The utility model has the advantages that: the oil well packing box for centering the large-diameter polish rod is designed to be matched with the polish rod with the diameter of 38mm for use, the diameter and the depth of an inner cavity of the polish rod packing box and the thread sealing type of a secondary packing box are optimized, a flat belt with better oil resistance, heat resistance and wear resistance replaces a rubber O-shaped sealing ring packing to be used as a packing, and the service life of the packing is prolonged; meanwhile, the polished rod righting device is arranged at the bottom end of the packing box, the inner diameter of the righting upper pressure plate and the distance between the screw heads on the inner movable disc are optimized, the righting application range of the deviated well is enlarged, the whole packing box can meet the high-level well control protection requirement, the sealing performance of the oil well is greatly improved, the labor intensity of workers is effectively reduced, the oil extraction rate of the oil well is improved, the stable operation of the oil pumping unit and equipment is ensured, and the safety and environmental protection accidents are reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, the following description is given in conjunction with the accompanying drawings and examples.
As shown in figure 1, the oil well packing box for centering a large-diameter polished rod comprises a packing box upper gland 1, an upper packing box gland 2, a first-stage packing box 3, a lower packing box gland 4, a second-stage packing box 5 and a centering device, wherein the centering device comprises a centering upper pressure plate 6, a centering lower pressure plate 7 and a movable plate 8, the bottom of the centering lower pressure plate is connected with a well mouth, the movable plate is arranged at the central position of the top of the centering lower pressure plate, the centering upper pressure plate is arranged at the top of the movable plate, the centering upper pressure plate is connected with two sides of the centering lower pressure plate through bolts 9, the movable plate, the second-stage packing box, the first-stage packing box and the packing box upper cover are all sleeved outside the polished rod 10 and are sequentially connected, the bottom of the second-stage packing box is connected with the top of the movable plate, the top of the second-stage packing box is connected with the bottom of the first-stage packing box, the top of the first-stage packing, the lower packing gland is arranged in an inner cavity at the top of the second-stage packing box.
A sealing notch is formed in the contact surface of the righting lower pressing plate and the movable disc, an O-shaped sealing ring 11 is embedded in the sealing notch, and the sealing and pressure-bearing effects are good.
Lubricating grease is coated in inner cavities of the first-level packing box and the second-level packing box, a flat strip is coiled along the polished rod, and the flat strip is used as a sealing filler, so that the oil resistance, the heat resistance and the wear resistance are improved. The sealing performance of the packing box is improved, the risk of oil leakage at a wellhead is reduced, and the occurrence of safety and environmental protection accidents is reduced.
Second grade packing box top and one-level packing box adopt oil pipe to detain threaded connection, and second grade packing box is connected with the activity dish screw thread, and the top of second grade packing box and one-level packing box all is equipped with the external screw thread, and the bottom all is equipped with the internal thread, and the activity dish comprises bottom disc and top sleeve, and the bottom disc is arranged in and is right the holding down plate and right between the top plate, and the telescopic outer wall in top is equipped with the external screw thread, with the bottom internal thread configuration spiro union of second grade packing box.
The polish rod packing box is designed to be matched with a polish rod with a major diameter of phi 38mm, the diameters of inner cavities of a first-level packing box and a second-level packing box are 60 mm-70 mm, preferably 64mm, and the depth is 95 mm-105 mm, preferably 100 mm. The size of the packing box is matched with that of a large-diameter polished rod, and the wall thickness of the packing box is not influenced.
The distance between the inner wall of the centralizing upper pressure plate and the top sleeve of the movable disc is 20-25 mm, preferably 22mm, and the centralizing application range of the deviated well is enlarged.
When the packing box is installed, firstly, the centralizing device is installed, the centralizing lower pressure plate is connected with a well head, an O-shaped sealing ring is sleeved in a sealing groove opening, then the movable disc is placed, the movable disc is adjusted according to the position of the polished rod to be aligned with the center of the polished rod, the centralizing upper pressure plate is placed, a bolt, a nut and a gasket are penetrated, a nut is screwed diagonally, a second-level packing box is connected with a movable disc screw thread, lubricating grease is coated in the second-level packing box and a flat strip is filled, the lower packing gland is placed, a first-level packing box is connected with the second-level packing box and screwed, the lubricating grease is coated in the first-level packing box and the flat strip is filled, and an upper packing gland and.
When changing the interior filler of one-level packing box, unscrew gland on the packing box, take out and go up packing gland and the interior whole flat strip of one-level packing box, change new flat strip can, when changing the interior filler of second level packing box, unscrew gland on the packing box, take out and go up packing gland and the interior whole flat strip of one-level packing box, unscrew second level packing box, take out down packing gland and the interior whole flat strip of second level packing box, change new flat strip, at last according to the opposite order back-to-back dress.
The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (8)
1. An oil well packing box for centralizing a large-diameter polished rod is characterized by comprising an upper packing box gland, an upper packing gland, a primary packing box, a lower packing gland, a secondary packing box and a centralizing device, wherein the centralizing device comprises a centralizing upper press plate, a centralizing lower press plate and a movable disk, the bottom of the centralizing lower press plate is connected with a well head, the movable disk is arranged at the central position of the top of the centralizing lower press plate, the centralizing upper press plate is arranged at the top of the movable disk, the centralizing upper press plate is connected with the two sides of the centralizing lower press plate through bolts, the movable disk, the secondary packing box, the primary packing box and the upper packing box cover are all sleeved outside the polished rod and are sequentially connected, the bottom of the secondary packing box is connected with the top of the movable disk, the top of the secondary packing box is connected with the bottom of the primary packing box, the top of the primary packing box is connected with the upper packing box cover, the upper packing, the lower packing gland is arranged in an inner cavity at the top of the second-stage packing box.
2. The oil well packing box for centering a large-diameter polished rod according to claim 1, wherein a sealing notch is formed in a contact surface of the centering lower pressure plate and the movable disk, and an O-shaped sealing ring is embedded in the sealing notch.
3. The oil well packing box for large diameter polished rod centralizing of claim 2, wherein the inner cavities of the primary packing box and the secondary packing box are coated with grease, and a flat strip is coiled along the polished rod.
4. The oil well packing box for centering of the large-diameter polish rod according to claim 1 or 3, wherein the top of the secondary packing box is connected with the primary packing box by oil pipe thread, and the secondary packing box is connected with the movable disk thread.
5. The oil well packing box for large diameter polish rod centralizing of claim 4, wherein the top of the secondary packing box and the primary packing box are both provided with external threads and the bottom thereof are both provided with internal threads.
6. The well packing box for centering of a large diameter polished rod according to claim 4, wherein the movable disk is composed of a bottom disk and a top sleeve, the bottom disk is placed between the centering lower pressing plate and the centering upper pressing plate, the outer wall of the top sleeve is provided with external threads, and the top sleeve is screwed with the bottom internal thread of the secondary packing box.
7. The oil well packing box for centering a large-diameter polish rod according to claim 4, wherein the inner cavities of the primary packing box and the secondary packing box have a diameter of 60mm to 70mm and a depth of 95mm to 105 mm.
8. The oil well packing box for centering of a large diameter polish rod according to claim 4, wherein the distance between the inner wall of the centering upper pressure plate and the top sleeve of the movable disk is 20mm to 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661491.1U CN213175577U (en) | 2020-08-11 | 2020-08-11 | Oil well packing box for centralizing large-diameter polished rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661491.1U CN213175577U (en) | 2020-08-11 | 2020-08-11 | Oil well packing box for centralizing large-diameter polished rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213175577U true CN213175577U (en) | 2021-05-11 |
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ID=75800087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021661491.1U Active CN213175577U (en) | 2020-08-11 | 2020-08-11 | Oil well packing box for centralizing large-diameter polished rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213175577U (en) |
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2020
- 2020-08-11 CN CN202021661491.1U patent/CN213175577U/en active Active
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