CN212317914U - Blowout prevention wellhead packing box - Google Patents
Blowout prevention wellhead packing box Download PDFInfo
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- CN212317914U CN212317914U CN202020211368.3U CN202020211368U CN212317914U CN 212317914 U CN212317914 U CN 212317914U CN 202020211368 U CN202020211368 U CN 202020211368U CN 212317914 U CN212317914 U CN 212317914U
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Abstract
The utility model provides a blowout prevention wellhead packing box, which comprises a box body, a pressing cap, a compression piston, a packing, a spring and a jacking screw, wherein the compression piston is sleeved on a polished rod of the blowout prevention wellhead, the box body is installed on the outer wall of the compression piston, the top of the box body is open, a packing cavity is arranged between the box body and the polished rod, and the packing and the spring are arranged in the packing cavity from top to bottom; the outer side wall of the box body is in threaded connection with a pressing cap, the polished rod penetrates through the pressing cap, the pressing cap is located at the top of the pressing piston, and the pressing cap can downwards extrude the pressing piston to enable the pressing piston to tightly press the packing; the side wall of the pressing cap is provided with a threaded hole perpendicular to the polished rod, and the jacking screw is fixed in the threaded hole and jacks the outer side wall of the box body. The utility model discloses can solve the packing box and be not enough to the lasting holding power of packing, press to be connected between cap and the box body not hard up, the poor problem of sealed effect of packing.
Description
Technical Field
The utility model belongs to the technical field of the well head is sealed, concretely relates to prevent spouting well head packing box.
Background
The operation is pressed in oil field well head area, need seal the well head earlier in order to guarantee to prevent spouting the performance, prevent spouting the well head and adopt the packing to seal the tubular column in the pit, in packing box was arranged in to the packing, was extrudeed by the packing box and guaranteed sealed effect.
The packing box of current blowout prevention well head is difficult to possess long-term packing retentivity, and the polished rod is difficult to hug closely continuously to the packing to the pressure cap at box body top and being connected between the box body may produce not hard up, influence the sealed effect of packing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a prevent spouting well head packing box to solve the packing box not enough to the continuous holding power of packing, press and be connected not hard up, the poor problem of sealed effect of packing between cap and the box body.
The utility model provides a following technical scheme:
a blowout-preventing wellhead packing box comprises a box body, a pressing cap, a pressing piston, a packing, a spring and a jacking screw, wherein the pressing piston is sleeved on a polished rod of a blowout-preventing wellhead; the outer side wall of the box body is in threaded connection with the pressing cap, the polished rod penetrates through the pressing cap, the pressing cap is located at the top of the pressing piston, and the pressing cap can downwards press the pressing piston to enable the pressing piston to press the packing; and a threaded hole perpendicular to the polished rod is formed in the side wall of the pressing cap, and the jacking screw is fixed in the threaded hole and jacks the outer side wall of the box body.
Preferably, the outer side wall of the pressing cap is provided with a convex fixing part, and the threaded hole penetrates through the fixing part.
Preferably, an annular groove is formed in the inner side wall of the pressing cap, a rubber sheet is placed in the groove, the width of the rubber sheet is larger than the outer diameter of the tightening screw, and the tail of the tightening screw is pressed against the rubber sheet.
Preferably, at least two tightening screws are symmetrically arranged on the pressing cap.
Preferably, the bottom end face of the pressing piston is provided with an annular bevel opening, and the cross section of the bevel opening is in a conical shape gradually expanding from top to bottom.
Preferably, annular gaskets are arranged at the upper end and the lower end of the spring in the packing cavity.
The utility model has the advantages that: the utility model discloses set up packing and spring in the packing intracavity, compress tightly piston and spring and extrude the packing from the upper and lower both sides of packing simultaneously to the spring carries out elasticity to the packing and compresses tightly, thereby applys stable holding power to the packing continuously, has improved the leakproofness between packing and the polished rod. In the process of elastic compression of the packing, a threaded hole perpendicular to the polished rod is formed in the side wall of the pressure cap, a jacking screw is installed in the threaded hole and jacks the box body along the radial direction of the box body, the box body transmits the pressure to the compression piston and the polished rod in sequence, and radial pressure is applied to the box body and the polished rod by the jacking screw, so that the sealing performance between the box body and the polished rod is effectively enhanced, and the sealing performance of a blowout prevention well head is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic sectional view of the present invention;
labeled as: 1. a box body; 2. pressing the cap; 3. a hold-down piston; 4. packing; 5. a spring; 6. jacking the screw tightly; 7. a polish rod; 8. a liner; 9. a fixed part; 10. a hexagonal end; 11. rubber sheets; 12. and (4) beveling.
Detailed Description
As shown in figure 1, the blowout-preventing wellhead packing box comprises a box body 1, a pressing cap 2, a pressing piston 3, a packing 4, a spring 5 and a tightening screw 6. The packing device comprises a packing box, a packing piston 3, a packing chamber, a packing 4 and a spring 5, wherein the packing box is sleeved on a polished rod 7 of a blowout prevention well head, an opening of the packing piston 3 faces downwards, the packing box 1 is installed on the outer wall of the packing piston 3, the top of the packing box 1 is open, the packing chamber is arranged between the packing box 1 and the polished rod 7, and the packing 4 and the spring 5 are arranged in the packing chamber; annular gaskets 8 are arranged at the upper end and the lower end of the spring 5 in the packing cavity. The outer side wall of the box body 1 is in threaded connection with the pressing cap 2, and the polish rod 7 penetrates through the top of the pressing cap 2 and the bottom of the box body 1 from top to bottom. The roof of pressing cap 2 can extrude compressing piston 3 downwards, makes compressing piston 3 compress tightly packing 4, guarantees the sealed effect of packing 4 to polished rod 7. The lateral wall of the pressing cap 2 is provided with a threaded hole perpendicular to the direction of the polish rod 7, the jacking screw 6 is fixed in the threaded hole and jacks the outer lateral wall of the box body 1, the jacking screw 6 applies radial pressure to the box body 1 and the polish rod 7, the pressing cap 2 is prevented from being connected with the box body 1 loosely, and the sealing performance between the box body 1 and the pressing piston 3 and the polish rod 7 is enhanced.
The outer side wall of the pressing cap 2 is provided with a convex fixing part 9, and the threaded hole penetrates through the fixing part 9. The fixing part 9 increases the length of the threaded hole, strengthens the locking area of the jacking screw 6 and the threaded hole, and improves the pressing effect of the jacking screw 6 on the box body 1 and the polished rod 7. The head of the jacking screw 6 is provided with a hexagonal end 10, so that a wrench can be conveniently used for screwing the jacking screw 6.
An annular groove is formed in the inner side wall of the pressing cap 2, a rubber sheet 11 is placed in the groove, the width of the rubber sheet 11 is larger than the outer diameter of the tightening screw 6, and the tail of the tightening screw 6 presses the rubber sheet 11. The contact area between the rubber sheet 11 and the side wall of the box body 1 is large, the pressure at the jacking position of the jacking screw 6 and the box body 1 is reduced, and the surface of the box body 1 is protected from being damaged by the jacking screw.
At least two jacking screws 6 are symmetrically arranged on the pressing cap 2 so as to enhance the balance and sealing effect of the jacking screws on the box body.
The bottom end face of the pressing piston 3 is provided with an annular bevel 12, and the cross section of the bevel 12 is a cone gradually expanding from top to bottom. The inclined opening 12 can tightly press the packing 4 towards the inclined lower part, so that the packing 4 is tightly attached to the polished rod, and the sealing effect is ensured.
When this blowout prevention well head packing box installation, upwards run through the box body with polished rod 7 by the box body bottom after stretching out and press cap 2, revolve to twist downwards and press cap 2, press the bevel connection 12 extrusion packing 4 and the spring 5 of cap 2 bottom, make packing 4 seal polished rod 7, then use the spanner to screw tight screw 6 in top, by radial locking box body 1 and polished rod 7, prevent because of pressing the problem that the sealing performance descends appears in the not hard up connection between cap 2 and the box body 1.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The blowout-preventing wellhead packing box is characterized by comprising a box body, a pressing cap, a pressing piston, a packing, a spring and a jacking screw, wherein the pressing piston is sleeved on a polished rod of a blowout-preventing wellhead; the outer side wall of the box body is in threaded connection with the pressing cap, the polished rod penetrates through the pressing cap, and the pressing cap can downwards extrude the pressing piston to enable the pressing piston to tightly press the packing; and a threaded hole perpendicular to the polished rod is formed in the side wall of the pressing cap, and the jacking screw is fixed in the threaded hole and jacks the outer side wall of the box body.
2. The packing box of claim 1, wherein a convex fixing portion is provided on an outer sidewall of the gland, and the threaded hole penetrates through the fixing portion.
3. The packing box of claim 2, wherein an annular groove is formed in the inner side wall of the pressing cap, rubber is placed in the groove, the width of the rubber is larger than the outer diameter of the tightening screw, and the tail of the tightening screw presses the rubber.
4. The blowout prevention wellhead packing box according to claim 3, wherein at least two tightening screws are symmetrically mounted on the pressure cap.
5. The packing box of claim 1, wherein the bottom end surface of the packing piston is provided with an annular bevel, and the cross section of the bevel is tapered from top to bottom.
6. The blowout preventer wellhead packing kit according to claim 1, wherein annular packing is disposed within the packing chamber at both the upper and lower ends of the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211368.3U CN212317914U (en) | 2020-02-25 | 2020-02-25 | Blowout prevention wellhead packing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211368.3U CN212317914U (en) | 2020-02-25 | 2020-02-25 | Blowout prevention wellhead packing box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212317914U true CN212317914U (en) | 2021-01-08 |
Family
ID=74029445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020211368.3U Active CN212317914U (en) | 2020-02-25 | 2020-02-25 | Blowout prevention wellhead packing box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212317914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719251A (en) * | 2021-08-20 | 2021-11-30 | 淮安市井神钻采机具有限公司 | Combined wellhead packing box |
-
2020
- 2020-02-25 CN CN202020211368.3U patent/CN212317914U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719251A (en) * | 2021-08-20 | 2021-11-30 | 淮安市井神钻采机具有限公司 | Combined wellhead packing box |
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