CN204225827U - Self-sealing head - Google Patents
Self-sealing head Download PDFInfo
- Publication number
- CN204225827U CN204225827U CN201420589927.9U CN201420589927U CN204225827U CN 204225827 U CN204225827 U CN 204225827U CN 201420589927 U CN201420589927 U CN 201420589927U CN 204225827 U CN204225827 U CN 204225827U
- Authority
- CN
- China
- Prior art keywords
- gum cover
- face
- taper seat
- centre bore
- lower house
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- Pressure Vessels And Lids Thereof (AREA)
Abstract
The utility model discloses a kind of self-sealing head, the upper mounting boss of lower house upper end with splitted cover board is fixed by stud; Glue core assembly is contained in lower house, and wherein the flanging on gum cover top is supported on the limited step of lower house inwall upper end, and flanging and to splitted cover board between clamp gland; Gum cover outer wall below flanging is combinatorial surface, and the hole wall of gum cover centre bore is combinatorial surface, and steel disc is embedded in gum cover; The external diameter on lining top is greater than the external diameter of bottom, a step surface is formed between large footpath section and path section, the large footpath section of lining is close to the hole wall of splitted cover board centre bore and the three cylindrical face of gum cover simultaneously, the plane of step surface and gum cover is fitted, and the path section of lining is inserted in the breach on gum cover second taper seat top.The utility model reliably can seal up the pernicious gas in well, prevents it from outwards overflowing formation " blowout ", drilling rod can be made again to remove neatly, thus can remove drilling rod under band pressure condition.
Description
Technical field
The utility model belongs to oil-drilling field, specifically, relates to a kind of for preventing the self-sealing head of blowout.
Background technology
At oil-drilling field, do not allow at present generally with pressurely to remove drilling rod, need during operation first to seal well head, the lower drilling rod of recurrence, operating efficiency is low, inconvenient operation.Do not allow the reason removing drilling rod with pressure to be that the toxic gas of down-hole may overflow simultaneously, thus cause blowout, and then cause serious security incident, be badly in need of solving above-mentioned technical barrier for this reason.
Utility model content
Technical problem to be solved in the utility model is the self-sealing head providing a kind of good seal performance, removes drilling rod for being realized by this self-sealing head under band pressure condition.
The technical solution of the utility model is as follows: a kind of self-sealing head, it is characterized in that: comprise lower house (1) and glue core assembly, the lower installation base (1a) of wherein lower house (1) lower end vertically has installing hole, upper mounting boss (1b) end face of this lower house upper end with fitted in splitted cover board (2) bottom surface, and be fixedly connected with by one group of stud vertically arranged (3), and to the axial line of splitted cover board (2) centre bore and the axial line of lower house (1) on same straight line; Described glue core assembly is contained in lower house (1), and comprise gum cover (4), steel disc (6) and lining (7), wherein the flanging (4a) on gum cover (4) top is supported on the limited step of described lower house (1) inwall upper end, and this flanging (4a) and described to splitted cover board (2) between clamp gland (5); Gum cover (4) outer wall of described flanging (4a) below is combinatorial surface, be followed successively by the first connected taper seat, first face of cylinder, the second taper seat and second face of cylinder from top to bottom, and first and second taper seat is all up big and down small; The hole wall of described gum cover (4) centre bore is combinatorial surface, be followed successively by the first connected taper seat, first face of cylinder, arcwall face, second face of cylinder, the second taper seat, plane and three cylindrical face from the bottom up, wherein the first taper seat is up-small and down-big, described arcwall face is the arcwall face of depression, and the diameter on described second face of cylinder is greater than the first face of cylinder diameter, and it is little greatly upper under described second taper seat, this the second taper seat upper end is connected with described plane the inner, and the outer end of this plane is connected with lower end, described three cylindrical face; Described steel disc (6) is embedded in gum cover (4), and is positioned at the second taper seat place of gum cover (4);
The axial line of described lining (7) centre bore and gum cover (4) axial line are on same straight line, and this centre bore is two-part structure, and bottom is cylindrical hole, and top is up big and down small conical bore; The external diameter on described lining (7) top is greater than the external diameter of bottom, a step surface is formed between this large footpath section and path section, and the large footpath section of lining (7) is close to the three cylindrical face of the described hole wall to splitted cover board (2) centre bore and gum cover (4) centre bore simultaneously, the step surface of described lining (7) and the plane of gum cover (4) centre bore are fitted, and the path section of lining (7) is inserted in the breach on gum cover (4) centre bore second taper seat top.
Before using, first lower house (1) is fixed on preventer.During use, drilling rod is through the centre bore of glue core assembly.Because the combinatorial surface of gum cover (4) outer wall designs, so just make the pernicious gas in well head be pressed in the whole outer wall of gum cover (4) from circumferencial direction, thus compress drilling rod.Simultaneously, the particular design of described gum cover (4) centre bore, the inwall of gum cover (4) and the intimate of drilling rod is made again to fit, thus carry out good sealing, simultaneously can relative movement between drilling rod and gum cover (4), this makes it possible to remove drilling rod under state with pressure, thus be convenient to remove drilling rod, increase work efficiency.
As preferably, the middle part level of described lower house (1) has an air vent, and the outer aperture place of this air vent is provided with an air relief cock (8).Described air relief cock (8) uses when pressure testing, and taking off air relief cock (8) after completing pressure testing can exit, and is again loaded onto by air relief cock (8) after completing venting again.
Beneficial effect: the utility model reliably can seal up the pernicious gas in well, prevent it from outwards overflowing formation " blowout ", drilling rod can be made again to remove neatly, thus drilling rod can be removed under band pressure condition, so just can overcome the defect of prior art well, and structure of the present utility model is simple, easy to implement, there is good practicality.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail:
As shown in Figure 1, a kind of self-sealing head, primarily of lower house 1, is formed splitted cover board 2, stud 3 and glue core assembly.Wherein, the lower installation base 1a of lower house 1 lower end vertically has installing hole, lower house 1 can be fixedly connected with preventer (not shown in FIG.) by the bolt be located in this installing hole.The upper mounting boss 1b end face of described lower house 1 upper end with fitted in splitted cover board 2 bottom surface, and to be fixedly connected with by one group of stud vertically arranged 3, and to the axial line of splitted cover board 2 centre bore and the axial line of lower house 1 on same straight line.The middle part level of described lower house 1 has an air vent (not marking in figure), and the outer aperture place of this air vent is provided with an air relief cock 8.
Described glue core assembly is contained in lower house 1, and forms primarily of gum cover 4, gland 5, steel disc 6 and lining 7.Wherein, the flanging 4a on gum cover 4 top is supported on the limited step of lower house 1 inwall upper end, and this flanging 4a and described to splitted cover board 2 between clamp a gland 5, the axial line of this gland 5 and the axial line of lower house 1 are on same straight line.
As can be seen from Figure 1, gum cover 4 outer wall below described flanging 4a is combinatorial surface, is followed successively by the first connected taper seat, first face of cylinder, the second taper seat and second face of cylinder from top to bottom, and first conical surface and the second taper seat all up big and down small.The hole wall of described gum cover 4 centre bore is combinatorial surface, be followed successively by the first connected taper seat, first face of cylinder, arcwall face, second face of cylinder, the second taper seat, plane and three cylindrical face from the bottom up, wherein the first taper seat is up-small and down-big, described arcwall face is the arcwall face of depression, and the diameter on described second face of cylinder is greater than the first face of cylinder diameter, and it is little greatly upper under described second taper seat, this the second taper seat upper end is connected with described plane the inner, and the outer end of this plane is connected with lower end, described three cylindrical face.Described steel disc 6 is embedded in gum cover 4, and is positioned at the second taper seat place of gum cover 4, and the number of steel disc 6 adjusts accordingly according to actual conditions, and these steel discs 6 are uniform along the circumference of gum cover 4.
The axial line of described lining 7 centre bore and gum cover 4 axial line are on same straight line, and this centre bore is two-part structure, and its underpart is cylindrical hole, and its top is up big and down small conical bore.The external diameter on described lining 7 top is greater than the external diameter of bottom, a step surface is formed between this large footpath section and path section, and the large footpath section of lining 7 is close to the three cylindrical face of the described hole wall to splitted cover board 2 centre bore and gum cover 4 centre bore simultaneously, the step surface of described lining 7 and the plane of gum cover 4 centre bore are fitted, and the path section of lining 7 is inserted in the breach on gum cover 4 centre bore second taper seat top.
The foregoing is only preferred embodiment of the present utility model; it is not restriction with the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. a self-sealing head, it is characterized in that: comprise lower house (1) and glue core assembly, the lower installation base (1a) of wherein lower house (1) lower end vertically has installing hole, upper mounting boss (1b) end face of this lower house upper end with fitted in splitted cover board (2) bottom surface, and be fixedly connected with by one group of stud vertically arranged (3), and to the axial line of splitted cover board (2) centre bore and the axial line of lower house (1) on same straight line; Described glue core assembly is contained in lower house (1), and comprise gum cover (4), steel disc (6) and lining (7), wherein the flanging (4a) on gum cover (4) top is supported on the limited step of described lower house (1) inwall upper end, and this flanging (4a) and described to splitted cover board (2) between clamp gland (5); Gum cover (4) outer wall of described flanging (4a) below is combinatorial surface, be followed successively by the first connected taper seat, first face of cylinder, the second taper seat and second face of cylinder from top to bottom, and first and second taper seat is all up big and down small; The hole wall of described gum cover (4) centre bore is combinatorial surface, be followed successively by the first connected taper seat, first face of cylinder, arcwall face, second face of cylinder, the second taper seat, plane and three cylindrical face from the bottom up, wherein the first taper seat is up-small and down-big, described arcwall face is the arcwall face of depression, and the diameter on described second face of cylinder is greater than the first face of cylinder diameter, and it is little greatly upper under described second taper seat, this the second taper seat upper end is connected with described plane the inner, and the outer end of this plane is connected with lower end, described three cylindrical face; Described steel disc (6) is embedded in gum cover (4), and is positioned at the second taper seat place of gum cover (4);
The axial line of described lining (7) centre bore and gum cover (4) axial line are on same straight line, and this centre bore is two-part structure, and bottom is cylindrical hole, and top is up big and down small conical bore; The external diameter on described lining (7) top is greater than the external diameter of bottom, a step surface is formed between this large footpath section and path section, and the large footpath section of lining (7) is close to the three cylindrical face of the described hole wall to splitted cover board (2) centre bore and gum cover (4) centre bore simultaneously, the step surface of described lining (7) and the plane of gum cover (4) centre bore are fitted, and the path section of lining (7) is inserted in the breach on gum cover (4) centre bore second taper seat top.
2. self-sealing head according to claim 1, is characterized in that: the middle part level of described lower house (1) has an air vent, and the outer aperture place of this air vent is provided with an air relief cock (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420589927.9U CN204225827U (en) | 2014-10-13 | 2014-10-13 | Self-sealing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420589927.9U CN204225827U (en) | 2014-10-13 | 2014-10-13 | Self-sealing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204225827U true CN204225827U (en) | 2015-03-25 |
Family
ID=52923936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420589927.9U Withdrawn - After Issue CN204225827U (en) | 2014-10-13 | 2014-10-13 | Self-sealing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204225827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295259A (en) * | 2014-10-13 | 2015-01-21 | 重庆中重石油机械有限公司 | Self-sealed joint |
-
2014
- 2014-10-13 CN CN201420589927.9U patent/CN204225827U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295259A (en) * | 2014-10-13 | 2015-01-21 | 重庆中重石油机械有限公司 | Self-sealed joint |
| CN104295259B (en) * | 2014-10-13 | 2016-08-31 | 重庆中重石油机械有限公司 | A kind of self-sealing head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150325 Effective date of abandoning: 20160831 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |