CN210068056U - Blowout preventer and Christmas tree - Google Patents
Blowout preventer and Christmas tree Download PDFInfo
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- CN210068056U CN210068056U CN201920120450.2U CN201920120450U CN210068056U CN 210068056 U CN210068056 U CN 210068056U CN 201920120450 U CN201920120450 U CN 201920120450U CN 210068056 U CN210068056 U CN 210068056U
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Abstract
The utility model provides a blowout preventer and a Christmas tree, which belongs to the technical field of oil well sealing, wherein the blowout preventer comprises a shell, a plugging ball, an elastic element, a plug and a sealing seat; the shell is provided with a first through hole and a first conical hole; the sealing seat is arranged at one end of the shell, which is far away from the first taper hole, and is provided with a second taper hole which is communicated with the first through hole; the shell is also provided with a second through hole which is vertical to and communicated with the first through hole, and the plug is positioned at one end of the second through hole and used for sealing the second through hole; one end of the elastic element is abutted against the plug, and the other end of the elastic element is abutted against the plugging ball, so that the plugging ball is abutted against the oil extraction polished rod; when the oil extraction polished rod is broken and taken off, the sealing ball can seal the first conical hole or the second conical hole. The utility model provides a blowout preventer and production tree can avoid the shutoff ball to appear the card phenomenon of dying and form effective shutoff to the through-hole, prevents to take place the blowout phenomenon.
Description
Technical Field
The utility model relates to an oil well seals technical field, especially relates to a preventer and christmas tree.
Background
The blowout preventer is a well mouth safety sealing device commonly used in oil extraction operation of oil fields. When the oil pipe is started and lowered in the oil extraction operation, a blowout preventer needs to be connected to the oil pipe head of the Christmas tree for preventing blowout.
The existing blowout preventer comprises a first through hole for the oil extraction polished rod to pass through, a blocking ball is embedded in the side wall of the first through hole, and the blocking ball is abutted to the oil extraction polished rod. When the oil extraction polished rod breaks and falls into the oil well, crude oil in the well is sprayed out from the well mouth, the crude oil enters the through hole, the plugging ball positioned in the through hole enters the through hole by utilizing the buoyancy of the crude oil, and the through hole can be plugged by the plugging ball, so that the well blowout is avoided due to the leakage of the crude oil.
However, the blocking ball on one side of the through hole is blocked and cannot fall into the through hole, and crude oil leakage is caused because the through hole cannot be effectively blocked.
SUMMERY OF THE UTILITY MODEL
The utility model provides a preventer and production tree can avoid the blocking ball to appear the card phenomenon of dying and form effective shutoff to the through-hole, prevents to take place the blowout phenomenon.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a blowout preventer, which comprises a shell, a plugging ball, an elastic element, a plug and a sealing seat; the shell is provided with a first through hole and a first conical hole positioned at one end of the first through hole; the sealing seat is arranged at one end, far away from the first taper hole, of the shell, and is provided with a second taper hole which is communicated with the first through hole; the shell is also provided with a second through hole which is perpendicular to and communicated with the first through hole, and the plug is positioned at one end, far away from the first through hole, of the second through hole and used for sealing the second through hole; the elastic element is arranged in the second through hole, one end of the elastic element is abutted against the plug, the other end of the elastic element is abutted against the blocking ball, and the blocking ball is abutted against the oil extraction polished rod; when the oil extraction polished rod is broken and taken off, the first taper hole or the second taper hole can be sealed by the sealing ball.
Furthermore, the elastic element is a spiral spring, and the plug is provided with a connecting column for sleeving the spiral spring.
Furthermore, the elastic element is a spiral spring, and the plug is provided with an annular mounting groove for embedding the spiral spring.
Further, a ball seat for positioning the plugging ball is arranged at the other end of the spiral spring; an arc-shaped positioning groove for clamping the blocking ball is formed in one side, facing the first through hole, of the ball seat; one side of the ball seat facing the plug is provided with an annular positioning groove, and one end of the spiral spring facing the ball seat is inserted into the annular positioning groove.
Furthermore, the plug and the ball seat are fixedly connected to two ends of the spiral spring.
Further, the shell is provided with a first mounting hole for mounting the sealing seat along the extending direction of the first through hole; the first mounting hole is communicated with the first through hole, the aperture of the first mounting hole is larger than that of the first through hole, and a first step surface is formed; a threaded hole used for being connected with a packing box is formed in one side, away from the second taper hole, of the sealing seat, a first external thread is arranged on the outer wall of the sealing seat, and a first internal thread matched with the first external thread is arranged in the first mounting hole; the sealing seat is connected to the shell through the first internal thread and the first external thread.
Furthermore, a first sealing gasket is arranged between the sealing seat and the shell, and the first sealing gasket is located on the first step surface.
Further, a second mounting hole for mounting the plug is formed in the shell along the extending direction of the second through hole; the second mounting hole is communicated with the second through hole, the aperture of the second mounting hole is larger than that of the second through hole, and a second step surface is formed; a second internal thread is arranged in the second mounting hole; the plug is provided with a second external thread matched with the second internal thread; the plug is connected to the shell through the second internal thread and the second external thread and plugs the second through hole.
Furthermore, a second sealing gasket is arranged between the plug and the shell, and the second sealing gasket is located on the second step surface.
The utility model discloses another aspect provides a production tree, include the preventer.
Compared with the prior art, the blowout preventer and the Christmas tree provided by the utility model have the following advantages;
the utility model provides a blowout preventer and a Christmas tree.A shell is provided with a first through hole and a second through hole communicated with the first through hole, and one end of the second through hole far away from the first through hole is provided with an end cap; a blocking ball and an elastic element are arranged in the second through hole, one end of the elastic element is abutted against the plug, the other end of the elastic element is abutted against the blocking ball, and the blocking ball is attached to the oil extraction polished rod; when the polished rod is broken and separated, the blocking ball smoothly enters the first through hole under the action of the elastic element and seals the first taper hole and the second taper hole at the two ends of the first through hole, so that the first through hole is effectively blocked, and the blowout phenomenon is prevented.
In addition to the technical problems, technical features constituting technical solutions, and advantageous effects brought by the technical features of the technical solutions described above, other technical problems, technical features included in the technical solutions, and advantageous effects brought by the technical features that the blowout preventer and the christmas tree provided by the present invention can solve will be described in further detail in specific embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, it should be apparent that the drawings in the following description are only a part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without creative efforts.
FIG. 1 is a top view of a blowout preventer provided by an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the housing of FIG. 1;
fig. 3 is an exploded view of a blowout preventer according to an embodiment of the present invention;
fig. 4 is a second exploded view of a blowout preventer according to an embodiment of the present invention;
fig. 5 is a schematic view of a first state of a blocking ball provided by an embodiment of the present invention;
fig. 6 is a schematic diagram of a second state of the blocking ball provided by the embodiment of the present invention;
fig. 7 is a third schematic view of a state of the blocking ball provided by the embodiment of the present invention.
Description of reference numerals:
10-a housing, wherein the housing is provided with a plurality of grooves,
11-the first through-hole or holes,
12-the second through-hole or holes,
13-the first conical hole, and the second conical hole,
14-a first mounting hole, which is provided with a hole,
15-a second mounting hole, and a second mounting hole,
16-the first step surface of the first step,
17-a third mounting hole, which is provided with a hole,
20-a sealing seat is arranged at the bottom of the container,
21-a second conical hole is formed in the inner wall of the hollow cylinder,
22-a threaded hole, which is provided with a thread,
30-a sealing ball is arranged at the bottom of the container,
40-a ball seat is arranged on the upper portion of the ball seat,
50-a spiral spring, wherein the spiral spring is arranged in the groove,
a plug is arranged at the position of 60 degrees,
70-a first sealing gasket, which is,
80-a second gasket.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1 to 4, a blowout preventer according to an embodiment of the present invention includes a housing 10, a blocking ball 30, an elastic element, a plug 60, and a seal seat 20; the shell 10 is provided with a first through hole 11 and a first taper hole 13 positioned at one end of the first through hole 11; the sealing seat 20 is installed at one end of the shell 10 far away from the first taper hole 13, the sealing seat 20 is provided with a second taper hole 21, and the second taper hole 21 is communicated with the first through hole 11; the shell 10 is further provided with a second through hole 12 perpendicular to and communicated with the first through hole 11, and the plug 60 is located at one end of the second through hole 12 far away from the first through hole 11 and used for sealing the second through hole 12; the elastic element is arranged in the second through hole 12, one end of the elastic element is abutted against the plug 60, the other end of the elastic element is abutted against the blocking ball 30, and the blocking ball 30 is abutted against the polish rod; when the oil extraction polish rod is broken, the blocking ball 30 can seal the first conical hole 13 or the second conical hole 21.
Specifically, the housing 10 may be cylindrical, a first through hole 11 for the oil pumping polished rod to pass through is provided along the axial direction of the housing 10, a first taper hole 13 is provided at one end of the first through hole 11, the first taper hole 13 may allow the oil pumping rod to pass through, and the aperture of the first through hole 11 is larger than the outer diameter of the blocking ball 30, so that the blocking ball 30 may move in the first through hole 11, and when the blocking ball 30 moves to the first taper hole 13, the blocking ball 30 is partially embedded into the first taper hole 13, and seals the first taper hole 13.
One end of the shell 10 is provided with a sealing seat 20, the sealing seat 20 is integrally cylindrical, one end of the sealing seat 20 close to the first through hole 11 is provided with a second taper hole 21, the second taper hole 21 can enable the oil extraction rod to pass through the second taper hole 21, the second taper hole 21 is located at one end of the first through hole 11 far away from the first taper hole 13, the second taper hole 21 is communicated with the first through hole 11, when the blocking ball 30 falls into the first through hole 11, along with the movement of the blocking ball 30 to the second taper hole 21, the blocking ball 30 is partially embedded into the second taper hole 21, and the second taper hole 21 is sealed.
It is understood that, in the present embodiment, the first tapered hole 13 and the second tapered hole 21 are respectively provided at both ends of the first through hole 11, wherein the first tapered hole 13 and the second tapered hole 21 may both be provided on the housing 10, or the first tapered hole 13 is provided on the housing 10, and the second tapered hole 21 is provided on a component connected to the housing 10, or the first tapered hole 13 and the second tapered hole 21 are both provided on a component connected to the housing 10, and at the same time, the first tapered hole 13 and the second tapered hole 21 are made to communicate with the first through hole 11. The present embodiment does not limit the positions of the first tapered hole 13 and the second tapered hole 21, and it is preferable that the first tapered hole 13 is provided on the housing 10 and the second tapered hole 21 is provided on the seal holder 20.
The casing 10 is provided with a second through hole 12, the second through hole 12 is located on one side of the first through hole 11, one end of the second through hole 12 is communicated with the first through hole 11, the other end of the second through hole 12 is provided with a plug 60, and the plug 60 can seal one end, away from the first through hole 11, of the second through hole 12. A sealing ball 30 and an elastic element are arranged in the second through hole 12, and the aperture of the second through hole 12 is larger than the outer diameter of the sealing ball 30, so that the sealing ball 30 can move in the second through hole 12. One end of the elastic element is abutted against the plug 60, the other end of the elastic element is abutted against the blocking ball 30, and the elastic element is installed in the second through hole 12 in a compressed state, so that the blocking ball 30 is abutted against the oil extraction polish rod penetrating through the first through hole 11.
As shown in fig. 5 to 7, when the blowout preventer according to the present embodiment is installed, the oil extraction polished rod is first inserted into the first through hole 11, the plugging ball 30 and the elastic element are then inserted from one end of the second through hole 12, and then the plug 60 is installed at the end of the second through hole 12 away from the first through hole 11, so that the plug 60 can seal the second through hole 12, and the elastic element is also installed in the second through hole 12 in a compressed state, so that the plugging ball 30 abuts against the sidewall of the oil extraction polished rod. When the oil extraction polished rod takes place to take off absolutely, the oil extraction polished rod falls into the oil recovery well, the shutoff ball 30 that is located second through-hole 12 gets into first through-hole 11 under elastic element's effect, shutoff ball 30 along first through-hole 11 free fall and seal first bell mouth 13, under the pressure effect in the well of oil recovery well, make crude oil get into first through-hole 11 in, crude oil drives shutoff ball 30 and rises to can seal second conical hole 21, effectively prevented crude oil leakage.
In the blowout preventer provided by the embodiment, the elastic element and the blocking ball 30 are arranged in the second through hole 12, one end of the elastic element abuts against the blocking ball 30, the other end abuts against the plug 60, and the elastic element is arranged in the second through hole 12 in a compressed state, so that the blocking ball 30 abuts against the oil extraction polish rod; when the oil extraction polished rod is broken and taken off, one side of the blocking ball 30 is not interfered by the oil extraction polished rod, and under the action of the elastic element, the blocking ball 30 can smoothly enter the second through hole 12 and seal the second through hole 12, so that the phenomenon that the blocking ball 30 is blocked and cannot enter the second through hole 12 and the well blowout phenomenon is caused can be avoided.
In this embodiment, the elastic element is a coil spring 50, and the plug 60 is provided with a connecting column for the coil spring 50 to be sleeved. Specifically, the elastic element can be a common spiral spring 50, one side of the plug 60 facing the spiral spring 50 is provided with a connecting column, and the axial section of the connecting column is circular; one end of the spiral spring 50 can be sleeved on the connecting column and abutted against the plug 60, the connecting column can position the spiral spring 50, and the axis of the spiral spring 50 is parallel to the axis of the second through hole 12, so that the blocking ball 30 can move along the axis of the second through hole 12 under the action of the spiral spring 50; the phenomenon that the blocking ball 30 is blocked in the moving process due to the included angle between the axis of the spiral spring 50 and the axis of the second through hole 12 is avoided.
It can be understood that, for guaranteeing that the axis of coil spring 50 is parallel with the axis of second through-hole 12, end cap 60 is provided with the annular mounting groove towards one side of coil spring 50, annular mounting groove and coil spring 50 clearance fit, coil spring 50's one end can inlay and establish in the annular mounting groove, can avoid coil spring 50 to rock in second through-hole 12, guarantee that coil spring 50's direction of elasticity is parallel with the axis of second through-hole 12, and just to acting on blocking ball 30, can make blocking ball 30 remove along the axis of second through-hole 12, avoid blocking ball 30 to appear blocking the phenomenon at second through-hole 12 in-process.
On the basis of the above embodiment, the other end of the coil spring 50 is provided with the ball seat 40 for positioning the blocking ball 30; an arc-shaped positioning groove for clamping the plugging ball 30 is arranged on one side of the ball seat 40 facing the first through hole 11; one side of the ball seat 40 facing the plug 60 is provided with an annular positioning groove, and one end of the coil spring 50 facing the ball seat 40 is inserted into the annular positioning groove.
Specifically, be provided with ball seat 40 in the second through-hole 12, ball seat 40 is used for the location of shutoff ball 30, and ball seat 40 is provided with the arc constant head tank towards one side of second through-hole 12, and the arc constant head tank cooperates with shutoff ball 30, can make in the shutoff ball 30 embedding arc constant head tank, is convenient for carry out the centre gripping to shutoff ball 30. One side of the ball seat 40 far away from the first through hole 11 is provided with an annular positioning groove, which is located at the edge of the ball seat 40 and is arranged outside the back contour of the arc-shaped positioning groove. Ball seat 40 one side is through arc constant head tank and the butt of shutoff ball 30, opposite side and 50 butts of coil spring, and coil spring 50 covers establishes at the back of arc constant head tank and inlays and establish in annular positioning groove, has strengthened the stability of coil spring 50 with the butt of ball seat 40. This embodiment is through having arranged ball seat 40 between coil spring 50 and shutoff ball 30, can make coil spring 50's effect act on ball seat 40, transmits to shutoff ball 30 through ball seat 40, can make shutoff ball 30 move along the axis of second through-hole 12, avoids shutoff ball 30 to appear blocking up the phenomenon in second through-hole 12.
It will be appreciated that the plug 60 and the ball seat 40 are fixedly coupled to both ends of the coil spring 50. Specifically, coil spring 50's one end can cup joint on the spliced pole, and with end cap 60 butt, the other end can overlap and establish on ball seat 40 and imbed in the annular positioning groove, for the reliability of reinforcing coil spring 50's both ends and end cap 60, ball seat 40's connection, coil spring 50's both ends respectively with end cap 60 and ball seat 40 accessible welded connection together, can be convenient for install ball seat 40, coil spring 50 and end cap 60 in second through-hole 12, also can make coil spring 50's axis be on a parallel with the axis of second through-hole 12 simultaneously.
In the present embodiment, the housing 10 is provided with a first mounting hole 14 for mounting the seal holder 20 along the extending direction of the first through hole 11; the first mounting hole 14 is communicated with the first through hole 11, the aperture of the first mounting hole 14 is larger than that of the first through hole 11, and a first step surface 16 is formed; the inner wall of the sealing seat 20 is provided with an internal thread for connecting with a packing box, the outer wall of the sealing seat 20 is provided with a first external thread, and the first mounting hole 14 is provided with a first internal thread matched with the first external thread; the seal holder 20 is connected to the housing 10 by a first internal thread and a first external thread.
Specifically, the housing 10 is provided with a first mounting hole 14 along an extending direction of the first through hole 11, the first mounting hole 14 is located at an upper end of the first through hole 11 and is communicated with the first through hole 11, a hole diameter of the first mounting hole 14 is larger than a hole diameter of the first through hole 11 and forms a first step surface 16, the first mounting hole 14 is used for mounting the seal holder 20, and the seal holder 20 can abut against the first step surface 16.
The one end that seal receptacle 20 kept away from second toper hole 21 is provided with the screw hole 22 that is used for being connected with the packing box, and seal receptacle 20 is provided with the second toper hole 21 and the screw hole 22 that are linked together respectively promptly, and the outer wall of packing box is provided with the external screw thread, and the packing box can insert in the screw hole 22 of seal receptacle 20 and be in the same place through internal thread and external screw thread connection. The outer wall of seal receptacle 20 is provided with first external screw thread, and first mounting hole 14 is provided with the first internal thread with first external screw thread complex, and seal receptacle 20 accessible first external screw thread and first internal thread connect on casing 10. In this embodiment, the blowout preventer is connected with the packing box through the seal receptacle 20, which can facilitate the disassembly and maintenance of the blowout preventer.
Further, in order to connect the sealing seat 20 in the first mounting hole 14 in a sealing manner, a first sealing gasket 70 is arranged between the sealing seat 20 and the housing 10, and the first sealing gasket 70 is located on the first step surface 16; when the seal holder 20 is mounted in the first mounting hole 14, the seal holder 20 abuts against the first step surface 16 and presses the first gasket 70, so that crude oil is prevented from flowing out from the gap between the first mounting hole 14 and the seal holder 20, and the sealing property between the seal holder 20 and the housing 10 is enhanced.
In this embodiment, the housing 10 is provided with a second mounting hole 15 for mounting the plug 60 along the extending direction of the second through hole 12; the second mounting hole 15 is communicated with the second through hole 12, the aperture of the second mounting hole 15 is larger than that of the second through hole 12, and a second step surface is formed; a second internal thread is arranged in the second mounting hole 15; the plug 60 is provided with a second external thread matched with the second internal thread; the plug 60 is connected to the housing 10 through the second internal thread and the second external thread, and blocks the second through hole 12.
Specifically, the housing 10 is provided with a second mounting hole 15 along the extending direction of the second through hole 12, the second mounting hole 15 is communicated with the second through hole 12, the aperture of the second mounting hole 15 is larger than the aperture of the second through hole 12, and a second step surface is formed; the second mounting hole 15 is used for mounting the plug 60, and one end of the plug 60 can abut against the second step surface. A second internal thread is arranged on the inner wall of the second mounting hole 15, a second external thread matched with the second internal thread is arranged on the plug 60, and the plug 60 can be connected to the shell 10 through the second external thread and the second internal thread and enables the plug 60 to abut against the second step surface. In this embodiment, the plug 60 is connected to the housing 10 by a screw thread, so that the plug 60 can be conveniently detached and installed, and the coil spring 50 and the ball seat 40 connected to the plug 60 can be conveniently checked.
Further, in order to prevent crude oil from flowing out of the second mounting hole 15, a second sealing gasket 80 is arranged between the plug 60 and the shell 10, and the second sealing gasket 80 is located on the second step surface; when the plug 60 is mounted in the second mounting hole 15, the plug 60 abuts against the second step surface and the plug 60 presses the second gasket 80, so that the gap between the plug 60 and the housing 10 is sealed, and the sealing property between the plug 60 and the housing 10 is enhanced.
Another aspect of the present embodiments provides a christmas tree that includes a blowout preventer. Specifically, the lower end of the blowout preventer is connected with an oil production pipe, the upper end of the blowout preventer is connected with a packing box through a sealing seat 20, and a polish rod can penetrate through the oil production pipe and the packing box to extract crude oil to the ground.
The blowout preventer comprises a shell 10, a blocking ball 30, an elastic element, a plug 60 and a seal seat 20; the shell 10 is provided with a first through hole 11 and a first taper hole 13 positioned at one end of the first through hole 11; a first mounting hole 14 for mounting a sealing seat 20 is formed in one end, away from the first tapered hole 13, of the housing 10, a second tapered hole 21 is formed in the sealing seat 20, and the second tapered hole 21 is communicated with the first through hole 11; a third mounting hole 17 for mounting a sampling pipe is formed in one end, close to the first conical hole 13, of the shell 10, and the third mounting hole 17 is communicated with the first conical hole 13; one end of the blowout preventer is thus connected to the packing box through the first mounting hole 14, and the other end thereof is connected to the production string through the third mounting hole 17. It will be appreciated that the packing box, production string may be threadedly connected to the blowout preventer.
The shell 10 is further provided with a second through hole 12 perpendicular to and communicated with the first through hole 11, and the plug 60 is located at one end of the second through hole 12 far away from the first through hole 11 and used for sealing the second through hole 12; the elastic element is arranged in the second through hole 12, one end of the elastic element is abutted against the plug 60, the other end of the elastic element is abutted against the blocking ball 30, and the blocking ball 30 is abutted against the polish rod; when the oil extraction polish rod is broken, the blocking ball 30 can seal the first conical hole 13 or the second conical hole 21.
A sealing ball 30 and an elastic element are arranged in the second through hole 12, and the aperture of the second through hole 12 is larger than the outer diameter of the sealing ball 30, so that the sealing ball 30 can move in the second through hole 12. One end of the elastic element is abutted against the plug 60, the other end of the elastic element is abutted against the blocking ball 30, and the elastic element is installed in the second through hole 12 in a compressed state, so that the blocking ball 30 is abutted against the oil extraction polish rod penetrating through the first through hole 11.
The production tree that this embodiment provided, when the oil recovery polished rod takes place to break and takes off, one side of shutoff ball 30 does not receive the interference of oil recovery polished rod, and under elastic element's effect, shutoff ball 30 can get into first through-hole 11 smoothly in and seal first through-hole 11, can avoid appearing blocking the phenomenon and can't get into in first through-hole 11 because shutoff ball 30 blocks dead to lead to the emergence of blowout phenomenon.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The blowout preventer is characterized by comprising a shell, a blocking ball, an elastic element, a plug and a sealing seat;
the shell is provided with a first through hole and a first conical hole positioned at one end of the first through hole; the sealing seat is arranged at one end, far away from the first taper hole, of the shell, and is provided with a second taper hole which is communicated with the first through hole;
the shell is also provided with a second through hole which is perpendicular to and communicated with the first through hole, and the plug is positioned at one end, far away from the first through hole, of the second through hole and used for sealing the second through hole;
the elastic element is arranged in the second through hole, one end of the elastic element is abutted against the plug, the other end of the elastic element is abutted against the blocking ball, and the blocking ball is abutted against the oil extraction polished rod;
when the oil extraction polished rod is broken and taken off, the first taper hole or the second taper hole can be sealed by the sealing ball.
2. The blowout preventer of claim 1, wherein the resilient element is a coil spring, and the choke plug is provided with a connecting string for the coil spring to telescope through.
3. The blowout preventer of claim 1, wherein the resilient element is a coil spring, and the choke plug is provided with an annular mounting groove into which the coil spring is inserted.
4. The blowout preventer of any one of claims 2 or 3, wherein the other end of the coil spring is provided with a ball seat for positioning the blocking ball;
an arc-shaped positioning groove for clamping the blocking ball is formed in one side, facing the first through hole, of the ball seat;
one side of the ball seat facing the plug is provided with an annular positioning groove, and one end of the spiral spring facing the ball seat is inserted into the annular positioning groove.
5. The blowout preventer of claim 4, wherein the choke plug and the ball seat are fixedly connected at opposite ends of the coil spring.
6. The blowout preventer of claim 1, wherein the housing is provided with a first mounting hole for mounting the seal holder in an extending direction of the first through hole;
the first mounting hole is communicated with the first through hole, the aperture of the first mounting hole is larger than that of the first through hole, and a first step surface is formed;
a threaded hole used for being connected with a packing box is formed in one side, away from the second taper hole, of the sealing seat, a first external thread is arranged on the outer wall of the sealing seat, and a first internal thread matched with the first external thread is arranged in the first mounting hole;
the sealing seat is connected to the shell through the first internal thread and the first external thread.
7. The blowout preventer of claim 6, wherein a first seal is disposed between the seal housing and the housing, the first seal being located on the first step face.
8. The blowout preventer of claim 1, wherein the housing is provided with a second mounting hole for mounting the choke plug along an extending direction of the second through hole;
the second mounting hole is communicated with the second through hole, the aperture of the second mounting hole is larger than that of the second through hole, and a second step surface is formed;
a second internal thread is arranged in the second mounting hole; the plug is provided with a second external thread matched with the second internal thread;
the plug is connected to the shell through the second internal thread and the second external thread and plugs the second through hole.
9. The blowout preventer of claim 8, wherein a second gasket is disposed between the choke plug and the housing, the second gasket being located on the second step surface.
10. A tree comprising a blowout preventer according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920120450.2U CN210068056U (en) | 2019-01-24 | 2019-01-24 | Blowout preventer and Christmas tree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920120450.2U CN210068056U (en) | 2019-01-24 | 2019-01-24 | Blowout preventer and Christmas tree |
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| CN210068056U true CN210068056U (en) | 2020-02-14 |
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| CN201920120450.2U Active CN210068056U (en) | 2019-01-24 | 2019-01-24 | Blowout preventer and Christmas tree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963095A (en) * | 2020-08-11 | 2020-11-20 | 大庆市富隆达石油工程机械设备有限公司 | Wellhead blowout preventer |
| CN113146114A (en) * | 2021-05-13 | 2021-07-23 | 中国石油天然气股份有限公司 | Welding single-filament head for maintaining without stopping conveying and pressing |
-
2019
- 2019-01-24 CN CN201920120450.2U patent/CN210068056U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963095A (en) * | 2020-08-11 | 2020-11-20 | 大庆市富隆达石油工程机械设备有限公司 | Wellhead blowout preventer |
| CN113146114A (en) * | 2021-05-13 | 2021-07-23 | 中国石油天然气股份有限公司 | Welding single-filament head for maintaining without stopping conveying and pressing |
| CN113146114B (en) * | 2021-05-13 | 2023-01-24 | 中国石油天然气股份有限公司 | Welding single-filament head for maintaining without stopping conveying and pressing |
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