CN211777294U - Guiding device for well control - Google Patents
Guiding device for well control Download PDFInfo
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- CN211777294U CN211777294U CN201922054432.1U CN201922054432U CN211777294U CN 211777294 U CN211777294 U CN 211777294U CN 201922054432 U CN201922054432 U CN 201922054432U CN 211777294 U CN211777294 U CN 211777294U
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Abstract
The utility model provides a guider for well control relates to in the emergent technical field of oil gas field blowout, has solved the big technical problem of the blowout preventer snap-fit degree of difficulty that exists among the prior art. The guiding device comprises a steel wire passing component, a supporting component, a guiding component and a locking component, wherein the steel wire passing component is arranged in a mounting hole of a wellhead flange, the supporting component and the guiding component are arranged outside the wellhead flange, the supporting component is connected with the steel wire passing component, the supporting component can be fixedly arranged on the wellhead flange through the locking component, the guiding component is rotatably connected with the supporting component, and a steel wire rope can penetrate out of the wellhead flange through the steel wire passing component and can be reversed through the guiding component. The utility model discloses can effectively simplify and rebuild well head operation flow, improve the site operation efficiency, reduce the operation risk.
Description
Technical Field
The utility model relates to an emergent technical field of oil gas field blowout, more specifically relates to a guider is used in well control.
Background
The blowout accident is the most serious accident in the exploration and development operation of the oil and gas field, the damage is extremely serious, and the blowout accident occurs on the offshore platform, so that the serious consequences such as explosion, fire, platform overturning, well damage and personal death, marine environmental pollution and the like can be caused. Therefore, equipment and technical research for dealing with blowout accidents are particularly important.
When a blowout preventer stack accident happens under the condition that a wellhead of an oil and gas field does not have the blowout preventer stack and the condition that the wellhead buckling condition is met (a wellhead casing head is intact or a new casing head is installed), the blowout preventer stack is quickly buckled on the wellhead and operations such as well shut-in throttling, blowout release, well killing and the like are implemented, so that the blowout preventer stack is an effective solution for controlling blowout. However, the blowout preventer stack is difficult to buckle, and fluid ejected from a wellhead can continuously impact the blowout preventer stack at a high speed under the action of formation pressure, so that the blowout preventer stack shakes, bolt holes are difficult to align, and buckling operation fails. Therefore, in the process of the emergency rescue buckling blowout preventer stack, the pneumatic winch is required to be connected with the steel wire rope to bind the blowout preventer stack, the blowout preventer stack is pressurized and centered, and meanwhile, the blowout preventer stack is lowered in a matched mode, the operation of rebuilding a wellhead is finally completed, and safe production is guaranteed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a guider for well control, its guider for well control is fixed in the well head flange, realizes the integration of pulley and well head. Thereby ensuring that the steel wire rope smoothly passes through, further realizing the pressurization and centralization of the blowout preventer stack, and finishing the buckling operation.
The utility model discloses a realize through following technical scheme:
a well control guide device comprises a steel wire traversing assembly, a supporting assembly, a guide assembly and a locking assembly;
the steel wire penetrating component is arranged in a mounting hole of a wellhead flange, the supporting component and the guiding component are arranged outside the wellhead flange, the supporting component is connected with the steel wire penetrating component, the supporting component can be fixedly arranged on the wellhead flange through the locking component, the guiding component is rotatably connected with the supporting component, and a steel wire rope can penetrate out of the wellhead flange through the steel wire penetrating component and can be reversed through the guiding component.
In the technical scheme, the steel wire penetrating component is of a tubular structure, and a through hole through which the steel wire rope penetrates is formed in the tubular structure.
In the technical scheme, the length of the tubular structure along the axial direction of the tubular structure is equal to the depth of the wellhead flange mounting hole.
In the above technical scheme, the supporting component comprises a flange connecting portion and a guide component mounting portion connected with the flange connecting portion, the steel wire penetrates through the component and is fixedly arranged above the guide component mounting portion, the guide component mounting portion is arranged below the wellhead flange, and the flange connecting portion is fixedly arranged on the wellhead flange through the locking component.
In the above technical scheme, the flange connecting portion includes connecting rod and supporting rod, wherein, the connecting rod with supporting rod interconnect is the L type, the free end of connecting rod with the direction subassembly installation department is connected, be provided with on the supporting rod locking Assembly.
In the above technical scheme, the direction subassembly installation department includes connecting plate and mounting panel, two the mounting panel symmetry set firmly in the both sides of connecting plate, the direction subassembly set up in two between the mounting panel and through the pivot with the mounting panel is connected.
In the above technical solution, the longitudinal section of the guide member mounting portion is in an inverted U shape.
In the above technical solution, the guide assembly is a pulley.
In the technical scheme, the locking assembly comprises a locking bolt and a bolt hole, the bolt hole is formed in the clamping rod, and the locking bolt can penetrate through the bolt hole to fix the guide assembly mounting part on the wellhead flange.
In the above technical scheme, the steel wire passing component and the supporting component are of an integrated structure.
An overwater wellhead well control emergency rescue method comprises the following steps:
step A, performing site investigation on an accident site and around a wellhead;
b, clearing obstacles around the wellhead and on the emergency channel;
c, rebuilding a wellhead by using the well control guiding device;
and D, connecting a well killing blowout pipeline to perform blowout or well killing operation.
In the above technical solution, after the step B is completed, the well control guide device described in the step C is installed on the well head with the well head casing head intact or with a new casing head installed.
In the technical scheme, two guiding devices for well control are symmetrically arranged on the wellhead.
In the above technical solution, the reconstructing a wellhead in step C includes the following steps:
step C1, fixing the support assembly on the wellhead flange through the locking assembly, and positioning the steel wire penetrating assembly in a mounting hole of the wellhead flange;
and step C2, the steel wire rope penetrates out of the wellhead flange through the steel wire penetrating assembly, and the pneumatic winch is used for righting and drawing the blowout preventer through the steel wire rope until the blowout preventer is completely aligned, so that the reconstruction of wellhead buckling operation is completed.
In the above technical solution, the clearing of the obstacle in step B includes the following steps:
step B1, cooling and shielding through a platform fire pump, a tugboat or a fire monitor on a fire fighting ship;
b2, hoisting the obstacles around the wellhead away by using a blowout preventer crane, a crane or a floating crane or an engineering ship;
step B3, cutting off the damaged old wellhead device through remote hydraulic sand blasting cutting equipment;
step B4, covering the draft tube, and leading the fluid sprayed out from the well to the upper part by utilizing the suction effect of the draft tube;
and step B5, removing the bottom flange to expose the head part of the wellhead casing pipe.
In the above technical solution, the obstacle includes a damaged derrick, a casing head, a base and/or a cantilever.
In the technical scheme, the unmanned aerial vehicle cruise monitoring and the rescue personnel wear the protective articles to carry out the on-site investigation in the step A.
In the technical scheme, the platform dangerous area is continuously sprayed and protected by a fire pump, a fire ship or a tug while the on-site investigation in the step A is carried out.
The utility model has the advantages of compared with the prior art, the utility model discloses penetrate sleeve pipe head flange both sides bolt hole with leading pulley according to the direction of traction symmetry to fasten leading pulley on the sleeve pipe head flange through locking bolt, make it as an organic whole with flange joint. The base with the pulley is fixed in the flange hole through a jackscrew, and then a steel wire rope is penetrated into the center hole. And centralizing and drawing the blowout preventer through a pneumatic winch until the blowout preventer is completely aligned, and completing the buckling operation of the reconstructed wellhead. The device can greatly promote well head spiral-lock efficiency, shortens operating time to guarantee can spiral-lock blowout preventer group fast when taking place the blowout, and then reduce environmental pollution, economic loss, reduced the emergent safety risk of speedily carrying out rescue work in-process of well control simultaneously.
Drawings
Fig. 1 is a schematic view of the overall structure of the guiding device provided by the present invention;
fig. 2 is a cross-sectional view of a guide device provided by the present invention;
fig. 3 is a side view of the guide device provided by the present invention;
fig. 4 is a schematic view of the guiding device and the wellhead flange provided by the present invention.
Wherein: 1 is a steel wire penetrating component, and 1-1 is a through hole;
2, a supporting component, 2-1, a flange connecting part, 2-2, a guide component mounting part, 2-1-1, a connecting rod, 2-1-2, a clamping rod, 2-2-1, a connecting plate and 2-2-2, wherein the flange connecting part is arranged on the flange connecting part;
3 is a guide component, 3-1 is a rotating shaft, 3-2 is a copper sleeve, and 3-3 is a stop plate;
4 is a locking assembly, 4-1 is a locking bolt, and 4-2 is a bolt hole;
and 5 is a steel wire rope.
100 is a guiding device for well control, 200 is a wellhead flange, 201 is a mounting hole, and 300 is a blowout preventer.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Example 1
As shown in fig. 1 to 4, a well control guide device comprises a steel wire traversing assembly 1, a supporting assembly 2, a guide assembly 3 and a locking assembly 4;
the steel wire penetrating component is arranged in a mounting hole 201 of a wellhead flange 200, the supporting component and the guiding component are arranged outside the wellhead flange, the supporting component is connected with the steel wire penetrating component, the supporting component can be fixedly arranged on the wellhead flange through the locking component, the guiding component is rotatably connected with the supporting component, and the steel wire rope 5 can penetrate out of the wellhead flange through the steel wire penetrating component and can be reversed through the guiding component.
The steel wire penetrating assembly is of a tubular structure, and a through hole 1-1 through which a steel wire rope penetrates is formed in the tubular structure; the length of the tubular structure along the axial direction of the tubular structure is equal to the depth of the wellhead flange mounting hole.
The supporting assembly comprises a flange connecting portion 2-1 and a guide assembly mounting portion 2-2 connected with the flange connecting portion, the steel wire penetrating assembly is fixedly arranged above the guide assembly mounting portion, the guide assembly mounting portion is arranged below the wellhead flange, and the flange connecting portion is fixedly arranged on the wellhead flange through the locking assembly. The flange connecting part comprises a connecting rod 2-1-1 and a clamping rod 2-1-2, wherein the connecting rod and the clamping rod are connected with each other in an L shape, the free end of the connecting rod is connected with the guide component mounting part, and the clamping rod is provided with the locking component. The guide assembly installation part comprises a connecting plate 2-2-1 and a mounting plate 2-2-2, the two mounting plates are symmetrically fixedly arranged on two sides of the connecting plate, the guide assembly is arranged between the two mounting plates and is connected with the mounting plates through a rotating shaft 3-1, a copper sleeve 3-2 is additionally arranged on the rotating shaft, and a stop plate 3-3 is arranged on the mounting plate on one side of the rotating shaft and can be used for limiting the rotating shaft. The longitudinal section of the guide assembly mounting part is in an inverted U shape. The steel wire penetrating component and the supporting component are of an integrated structure.
The guide assembly is a pulley. The locking assembly comprises a locking bolt 4-1 and a bolt hole 4-2, the bolt hole is formed in the clamping rod, and the locking bolt can penetrate through the bolt hole to fix the guide assembly mounting part on the wellhead flange.
The utility model discloses penetrate wellhead (casing head) flange 200 both sides bolt hole with above-mentioned guider 100 for well control according to the direction of pull symmetry to fasten guider on the casing head flange through locking bolt 4-1, make it as an organic whole with flange joint. The base with the pulley is fixed in the flange hole through a jackscrew, and then a steel wire rope 5 is penetrated into the central hole. And centralizing and drawing the blowout preventer 300 by a pneumatic winch until the blowout preventer is completely aligned, and completing the buckling operation of the reconstructed wellhead. The device can greatly promote well head spiral-lock efficiency, shortens operating time to guarantee can spiral-lock blowout preventer group fast when taking place the blowout, and then reduce environmental pollution, economic loss, reduced the emergent safety risk of speedily carrying out rescue work in-process of well control simultaneously.
Example 2
At present, when blowout/fire occurs on the offshore fixed platform in China, a wellhead device deforms, is damaged or fails, and fluid in a well cannot be controlled on site, emergency rescue operation needs to be carried out, and the offshore fixed platform is restored to a first-level or second-level well control state. The existing emergency rescue is mainly controlled by drilling a rescue well, naturally depleting the stratum capacity, matching with other treatment measures and the like, but the construction of the marine rescue well is restricted by weather and sea conditions, so the working period is long and the cost is high.
To the problem, the utility model also provides a well control emergency rescue method based on fixed platform dry-type well head, its operation flow scientific and reasonable, the decision-making is swift, and the response is rapid, and easy operation practices thrift the time limit for a project, receives the influence of weather and sea condition less relatively, and the harm that the greatly reduced accident caused the environment reduces social influence and can guarantee pit shaft integrality.
In order to achieve the purpose, the utility model adopts the following technical proposal: an overwater wellhead well control emergency rescue method is characterized by comprising the following steps: step A, accident scene investigation; step B, clearing obstacles on the accident scene; step C, rebuilding a wellhead; d, killing the well; in addition, the whole fire control and protection work of personnel is needed, and the emergency rescue operation is finally completed through the process.
In the step A, on-site investigation is firstly carried out on the accident site and around a wellhead before emergency operation, on-site investigation can be carried out on the sea through unmanned aerial vehicle cruise monitoring and emergency personnel wearing protective articles, and meanwhile, continuous spraying protection is carried out on a platform danger area by matching with a fire pump, a fire fighting ship, a tug and the like, so that the on-site emergency personnel are prevented from being threatened by toxic and harmful gas, explosion and heat radiation, further, danger sources near the site are clarified, and the sequence of barrier clearing operation is determined.
In the step B, the accident site obstacle clearing means that obstacles around the well mouth and on the emergency channel, including the damaged well head, the casing head, the base, the cantilever beam and the like, are cleared before the well mouth is rebuilt in order to fully expose the well mouth and protect the well mouth no matter whether the well mouth area catches fire or not. The marine barrier removal needs cooling and shielding by means of a platform fire pump, a tugboat or a fire monitor on a fire-fighting ship, then obstacles around a well mouth are lifted away by means of a blowout preventer crane, a crane or a floating crane or an engineering ship, a damaged old well mouth device is cut off by means of remote hydraulic sand blasting cutting equipment, then a guide pipe is covered, fluid sprayed out of the well is led to the upper side by means of the suction effect of the guide pipe, then a bottom flange is removed, and the part of a well mouth sleeve pipe head is exposed. If the sleeve head part is damaged and deformed, a remote ultrahigh pressure abrasive jet cutting device can be used for cutting and local obstacle removal to expose the light sleeve part.
In the step C, the reconstruction of the wellhead means that the purpose of recovering the wellhead is achieved by installing new wellhead equipment (a casing head, a four-way joint, a blowout preventer stack, a guide pipe and the like), the control on the wellhead is recovered, and necessary conditions are provided for killing construction. The buckling of new offshore wellhead equipment also needs cooling and shielding by means of a platform fire pump, a tugboat or a fire monitor on a fire ship, and then the integral buckling operation is carried out by means of a blowout preventer crane, a crane or a floating crane and an engineering ship. For the condition that only optical sleeves are left, a special sleeve head for emergency rescue needs to be installed firstly, the bottom foundation of a wellhead device is built, and then the buckling of a new blowout preventer stack is completed.
And D, after the new wellhead is built, connecting a blowout pipeline of the well killing to perform blowout or well killing operation. If the platform is completely damaged or the rebuilt wellhead is invalid, a disposal plan of drilling the relief well should be started immediately, well blowout is controlled from the source through the relief well, and more oil gas loss and environmental pollution are avoided. Or the well blowout can not be effectively controlled in a short time in the early period of the accident, the rescue well plan can be started, and once the well mouth is successfully rebuilt, the well drilling operation of the rescue well can be stopped, so that the rescue efficiency can be improved, and the rescue cost can be greatly increased correspondingly.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (10)
1. A well control guide device is characterized by comprising a steel wire traversing assembly, a supporting assembly, a guide assembly and a locking assembly, wherein,
the steel wire penetrating component is arranged in a mounting hole of the wellhead flange, the supporting component and the guiding component are arranged outside the wellhead flange, the supporting component is connected with the steel wire penetrating component, the supporting component can be fixedly arranged on the wellhead flange through the locking component, the guiding component is rotatably connected with the supporting component, and the steel wire rope can penetrate out of the wellhead flange through the steel wire penetrating component and can be reversed through the guiding component.
2. The well control guide device of claim 1, wherein the support assembly comprises a flange connection portion and a guide assembly mounting portion connected to the flange connection portion, the steel wire crossing assembly is fixedly arranged above the guide assembly mounting portion, the guide assembly mounting portion is arranged below the wellhead flange, and the flange connection portion is fixedly arranged on the wellhead flange through the locking assembly.
3. The well control guide device of claim 2, wherein the flange connection portion comprises a connection rod and a clamping rod, wherein the connection rod and the clamping rod are connected with each other in an L shape, a free end of the connection rod is connected with the guide assembly mounting portion, and the clamping rod is provided with the locking assembly.
4. The well control guide device of claim 2, wherein the guide assembly mounting portion comprises a connecting plate and two mounting plates, the two mounting plates are symmetrically and fixedly arranged on two sides of the connecting plate, and the guide assembly is arranged between the two mounting plates and connected with the mounting plates through a rotating shaft.
5. A well control guide device according to claim 2 or 4, wherein the guide assembly mounting portion is of inverted U-shape in longitudinal cross-section.
6. A well control guide device as defined in claim 1, wherein the wire traversing assembly is a tubular structure having a through bore disposed therein through which a wire rope passes.
7. A well control guide device according to claim 6, wherein the length of the tubular structure in the direction of its axis is equal to the depth of the wellhead flange mounting hole.
8. The well control guide of claim 1, wherein the guide assembly is a sheave.
9. The well control guide device of claim 3, wherein the locking assembly comprises a locking bolt and a bolt hole, the bolt hole is formed in the clamping rod, and the locking bolt can penetrate through the bolt hole to fix the guide assembly mounting part on the wellhead flange.
10. The well control guide device of claim 1, wherein the wire traversing assembly and the support assembly are both of a unitary construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054432.1U CN211777294U (en) | 2019-11-25 | 2019-11-25 | Guiding device for well control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922054432.1U CN211777294U (en) | 2019-11-25 | 2019-11-25 | Guiding device for well control |
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| Publication Number | Publication Date |
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| CN211777294U true CN211777294U (en) | 2020-10-27 |
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| CN201922054432.1U Active CN211777294U (en) | 2019-11-25 | 2019-11-25 | Guiding device for well control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952943A (en) * | 2019-11-25 | 2020-04-03 | 中国海洋石油集团有限公司 | Guiding device for well control and using method thereof |
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2019
- 2019-11-25 CN CN201922054432.1U patent/CN211777294U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952943A (en) * | 2019-11-25 | 2020-04-03 | 中国海洋石油集团有限公司 | Guiding device for well control and using method thereof |
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