CN103225488A - Blowout-preventing safety wellhead device - Google Patents
Blowout-preventing safety wellhead device Download PDFInfo
- Publication number
- CN103225488A CN103225488A CN 201310175483 CN201310175483A CN103225488A CN 103225488 A CN103225488 A CN 103225488A CN 201310175483 CN201310175483 CN 201310175483 CN 201310175483 A CN201310175483 A CN 201310175483A CN 103225488 A CN103225488 A CN 103225488A
- Authority
- CN
- China
- Prior art keywords
- oil
- blowout prevention
- wellhead
- blowout
- cap
- 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.)
- Pending
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a blowout-preventing safety wellhead device which is used for solving the problems that when an oil well needs to lift a pipe column to carry out pump inspection maintenance, the crude oil splashes in all directions due to the joint breaking down of an oil tube, the resource waste and the environmental pollution are caused, and fire and personnel casualties are easily caused. The device disclosed by the invention is provided with a blowout-preventing wellhead body, wherein the upper part of the blowout-preventing wellhead body is connected with a hopper body while the middle part is provided with a screw rod and the lower part is connected with a casing nipple; the hopper body is in the shape of a cylinder; the periphery of the hopper body is provided with a hopper cover which is open at the upper part; a splash-proof rectifying plate is arranged in the hopper cover; a liquid return hole is formed at the position, below the splash-proof rectifying plate, of the side wall of the hopper body; and a blowout-preventing opening is arranged on the casing nipple. The device disclosed by the invention has the advantages that the crude oil in the oil tube no longer spouts and leaks around the wellhead; when the device is cooperated with an efficient plugging pressure relief device of the oil tube, liquid not under pressure in the oil tube can completely flow back to the well and in the meantime, if oil spout of oil casing annulus happens during well repair, blocking can be timely carried out; and therefore, the working environment of the well repair is improved, and resource waste and environmental pollution are avoided.
Description
Technical field
The invention belongs to the oilfield exploitation field of mechanical technique, be specifically related to a kind of blowout prevention safety wellhead assembly.
Background technology
Mechanical oil production model is the mode of production the most widely of present each Oilfield using.After regular period, oil well often needs to propose tubing string and examines the pump maintenance oil field computer collecting system in continuous ordinary production; Oil well is owing to the reason of bar, pipe or pump can not normal need be carried out workover treatment.Workover treatment mode according to present is prone to following problem in the operation: one, flow string string bottom is not caused and has been full of liquid in the oil pipe because of drainage device is installed, and causes oil pipe to unload that crude oil splashes when single everywhere; Because of the disconnected bar of sucker rod or dropout ineffective the failing of bleeder opened when two, drainage device being installed, also can cause the crude oil splash when single in oil discharge pipe; Three, on oil pipe, carry in the process because bottom pressure is higher, in the oil pipe during liquid regular meeting upwards spray well head, crude oil can spray from the oil jacket annular space sometimes.Liquid flows out in a large number in the well, has not only caused the wasting of resources and environment pollution, and causes the accident of fire and casualties and equipment damage easily, influences the safety of operation.At this kind situation, press for a kind of Blowout prevention wellhead device that can solve crude oil splash problem in the workover treatment.
Summary of the invention
The purpose of this invention is to provide a kind of blowout prevention safety wellhead assembly, the oil pipe inner fluid is injected in around the well head when avoiding loading and unloading single oil pipe in the well workover work progress.
The technical solution adopted in the present invention is:
Blowout prevention safety wellhead assembly is characterized in that:
Described blowout prevention safety wellhead assembly is provided with the Blowout prevention wellhead body, and Blowout prevention wellhead body top is connected with funnel body, and the middle part is provided with screw mandrel, and the bottom is connected with casing nipple;
Described funnel body is a cylindrical shape, and ring week is provided with the funnel cover of upper opening, is provided with the splashproof cowling panel in the funnel cover, and the funnel body sidewall is positioned at the following position of splashproof cowling panel and offers hole for back flow;
Offer the open flow mouth on the described casing nipple.
Described screw mandrel is connected with silk braid near an end of device axis, and the silk braid end is provided with the sealing semicircle;
Screw mandrel passes and two hold cap and twoly hold the bearing of cap both sides, and the other end is provided with hexagonal cap, offers the big lock pin that is used for precession or screws out screw mandrel on the hexagonal cap, the bearing both sides with pair hold the position that cap contacts back-up ring be installed.
Described casing nipple lower end connects well head joint hoop.
Described funnel cover outer wall is provided with drop handle.
Described funnel body top is provided with the handling instrument hole.
The present invention has the following advantages:
The present invention can make in the oil pipe crude oil no longer spray to leak to well head, be used with the efficient shutoff pressure relief device of oil pipe, can make and not be with the press liquid total reflux in the oil pipe to well, if oil jacket annular space oil spout shutoff in time takes place during well workover simultaneously, improved the workover treatment environment, avoid the wasting of resources and environment pollution, effectively eliminated the threat of fire or personnel casualty accidents and equipment damage.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure, 1-handling instrument hole, 2-funnel body, 3-drop handle, 4-splashproof cowling panel, 5-funnel cover, 6-hole for back flow, 7-Blowout prevention wellhead body, 8-back-up ring, the two caps that hold of 9-, the 10-hexagonal cap, 11-seals semicircle, 12-silk braid, the 13-screw mandrel, 14-bearing, the big lock pin of 15-, 16-open flow mouth, 17-casing nipple, 18-well head joint hoop.
The specific embodiment
The present invention will be described in detail below in conjunction with the specific embodiment.
A kind of blowout prevention safety wellhead assembly of the present invention is provided with Blowout prevention wellhead body 7, and Blowout prevention wellhead body 7 tops are connected with funnel body 2, and the middle part is provided with screw mandrel 13, and the bottom is connected with casing nipple 17, and casing nipple 17 lower ends connect well head joint hoop 18.Funnel body 2 is a cylindrical shape, and ring week is provided with the funnel cover 5 of upper opening, is provided with splashproof cowling panel 4 in the funnel cover 5, and funnel body 2 sidewalls are positioned at the position of splashproof cowling panel below 4 and offer hole for back flow 6.Offer open flow mouth 16 on the casing nipple 17.
Screw mandrel 13 is connected with silk braid 12 near an end of device axis, and silk braid 12 ends are provided with sealing semicircle 11; Screw mandrel 13 passes and two hold cap 9 and twoly hold the bearing 14 of cap 9 both sides, and the other end is provided with hexagonal cap 10, offers the big lock pin 15 that is used for precession or screws out screw mandrel 13 on the hexagonal cap 10, bearing 14 both sides with pair hold the position that cap 9 contacts back-up ring 8 be installed.This part-structure is symmetrical set, and screws hexagonal cap 10 simultaneously, and two sealing semicircles 11 of screw mandrel 13 1 ends are closed gradually, can hold oil pipe tightly, thus shutoff oil jacket annular space.
Be not opened when promptly carrying out well workover upper lifting pipe post when running into flow string lower end bleeder, liquid is in full state in the oil pipe of oil well pump top, the differential pressure action of fluid column in the oil pipe unloading when single owing to can make the crude oil that exists in the oil pipe cause strong injection in the process that flows out oil pipe.At this moment, the shaft mouth operation personnel should at first install blowout prevention safety well head after laying down well head, unload the crude oil that flows out in the oil pipe when single so that collect.During installation blowout prevention safety well head integral body is placed on the well head joint hoop 18, screws, well head joint hoop 18 screw threads closely are connected with pipe nipple 17 screw threads.Can steadily play flowline after the installation and unload singlely, whenever unload next root oil pipe, intraluminal fluid is known from experience and is all flow in the funnel body 2, and liquid can be avoided sputtering outside the funnel by splashproof finishing plate 4 time, flows back in the well via the oil jacket annular space by hole for back flow 6 then.When the recovered oil liquid in pipe, sealing semicircle 11 is in open mode, and open flow mouth 16 is in closed condition.
In running into, contain a large amount of gases owing to liquid in the oil pipe, make when dismantling tubing string substantial oil from around the oil pipe upper end is injected into well head the time, the efficient shutoff pressure relief device of oil pipe (application number is called " the efficient shutoff pressure relief device of a kind of oil pipe " for " 201320175980X ", name) can be installed be used with this blowout prevention safety well head.The efficient shutoff pressure relief device of oil pipe at first correctly is installed and is connected relief line to open flow mouth 16, open spout 16 is closed sealing semicircle 11 Seal Oil cover annular space; Open the pressure relief device of the efficient shutoff pressure relief device of oil pipe then, release also makes crude oil reclaim in the well from open flow mouth 16.After open flow finishes, remove oil pipe shutoff pressure relief device, close open flow mouth 16, open sealing semicircle 11, continued flowline.
In when, in the construction sleeve pipe oil spout taking place when, should stop to lift by crane the oil pipe operation, the rotation hexagonal cap 10(left and right sides screws simultaneously), sealing semicircle 11 is combined closely with oil pipe, the oil jacket annular space is blocked.Thereupon, open flow mouth 16 being opened (preset in advance flows oil level well and puts) is released annular pressure.
After construction finishes, unload this device.
It is cited that content of the present invention is not limited to embodiment, and the conversion of any equivalence that those of ordinary skills take technical solution of the present invention by reading manual of the present invention is claim of the present invention and contains.
Claims (5)
1. blowout prevention safety wellhead assembly is characterized in that:
Described blowout prevention safety wellhead assembly is provided with Blowout prevention wellhead body (7), and Blowout prevention wellhead body (7) top is connected with funnel body (2), and the middle part is provided with screw mandrel (13), and the bottom is connected with casing nipple (17);
Described funnel body (2) is a cylindrical shape, ring week is provided with the funnel cover (5) of upper opening, be provided with splashproof cowling panel (4) in the funnel cover (5), funnel body (2) sidewall is positioned at the following position of splashproof cowling panel (4) and offers hole for back flow (6);
Offer open flow mouth (16) on the described casing nipple (17).
2. blowout prevention safety wellhead assembly according to claim 1 is characterized in that:
Described screw mandrel (13) is connected with silk braid (12) near an end of device axis, and silk braid (12) end is provided with sealing semicircle (11);
Screw mandrel (13) passes two cap (9) and two bearings (14) of cap (9) both sides that hold of holding, the other end is provided with hexagonal cap (10), offer the big lock pin (15) that is used for precession or screws out screw mandrel (13) on the hexagonal cap (10), bearing (14) both sides with pair hold the position that cap (9) contacts back-up ring (8) be installed.
3. blowout prevention safety wellhead assembly according to claim 1 and 2 is characterized in that:
Described casing nipple (17) lower end connects well head joint hoop (18).
4. blowout prevention safety wellhead assembly according to claim 3 is characterized in that:
Described funnel cover (5) outer wall is provided with drop handle (3).
5. blowout prevention safety wellhead assembly according to claim 4 is characterized in that:
Described funnel body (2) top is provided with handling instrument hole (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310175483 CN103225488A (en) | 2013-05-14 | 2013-05-14 | Blowout-preventing safety wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310175483 CN103225488A (en) | 2013-05-14 | 2013-05-14 | Blowout-preventing safety wellhead device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103225488A true CN103225488A (en) | 2013-07-31 |
Family
ID=48836104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310175483 Pending CN103225488A (en) | 2013-05-14 | 2013-05-14 | Blowout-preventing safety wellhead device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103225488A (en) |
-
2013
- 2013-05-14 CN CN 201310175483 patent/CN103225488A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101644149B (en) | Integral type level oil extraction wellhead equipment | |
| CN202266242U (en) | Gas well pumping and raining device | |
| CN104975818A (en) | Device and technological method for pulling lower oil tube | |
| CN203248113U (en) | Anti-spraying safety well opening device | |
| CN110617023B (en) | No drill floor well head operation overflow liquid collection device | |
| CN209603919U (en) | Not termination of pumping negative pressure sand washing auto Isolator Well Head | |
| CN106761525A (en) | Rob gusher mouthful and rob spray method | |
| CN202866729U (en) | Anti-theft well head device | |
| CN103225488A (en) | Blowout-preventing safety wellhead device | |
| CN202432249U (en) | Anti-leakage device of coal gas drainer | |
| CN208605811U (en) | A kind of oil rig | |
| CN201330934Y (en) | Multifunctional well type drainer | |
| CN202452029U (en) | Safety pipeline plug device | |
| CN208267812U (en) | A kind of oil well head device | |
| CN206617128U (en) | A kind of plug | |
| CN202012337U (en) | Oil wellhead chemical agent adding device | |
| CN202273630U (en) | Controllable pressure-release antitheft well shutting device in well opening | |
| CN201401147Y (en) | Well blowout prevention device | |
| CN203175456U (en) | High-efficiency plugging and pressure-releasing device of oil pipe | |
| CN104100222A (en) | Efficient blocking and pressure releasing device for oil pipe | |
| CN203594393U (en) | Conveying and fishing device of tubing hanger plugging device | |
| CN200940465Y (en) | Cable anti-blow-out device | |
| CN202249890U (en) | Anti-spraying box fast connection device | |
| CN205243429U (en) | Edge natural gas well well head protection and mining devices | |
| CN204568488U (en) | Gas discharging apparatus in a kind of oil groove of Oil & Gas Storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130731 |