CN-122014145-A - Plug-in type well blowout wellhead crude oil collecting device and collecting method

CN122014145ACN 122014145 ACN122014145 ACN 122014145ACN-122014145-A

Abstract

The invention discloses an inserted type crude oil collecting device for a blowout wellhead, which comprises a central tube, a connector mechanism, a hydraulic cylinder mechanism, a slip mechanism, a capsule sealing mechanism, an interference sealing mechanism and a guiding mechanism. The invention also discloses a method for collecting crude oil at a blowout wellhead, which comprises the following steps of selecting a matched extension pipeline, a blowout preventer device, a hydraulic valve and a collecting pipeline, fixedly connecting a central pipe, the extension pipeline, the blowout preventer device, the hydraulic valve and the collecting pipeline in sequence, connecting a connector mechanism and the hydraulic valve with a hydraulic station respectively, placing the device at a proper position in a sleeve, fastening and fixing a slip mechanism in the sleeve, ensuring that a capsule sealing mechanism and an interference sealing mechanism are tightly sealed on the sleeve, and collecting crude oil. The invention has reasonable structure and strong practicability, and can reduce the risk of crude oil pollution to the environment and improve the efficiency of emergency operation.

Inventors

ZHENG QIANG
DONG WEIWEI
LI JIA
MA LONG
QI JINTAO
WANG CHUNYAN
LIU GANG
XI FENGLIANG
ZHANG XIAOJUN
SHI JIANSHAN
YANG ZISEN

Assignees

中国石油集团渤海钻探工程有限公司
中国石油天然气集团有限公司

Dates

Publication Date: 20260512
Application Date: 20241111

Claims (7)

1. The plug-in type well head crude oil collecting device is characterized by comprising a central pipe with a hydraulic oil way, a connector mechanism fixedly arranged at the upper end of the central pipe and communicated with the hydraulic oil way, a hydraulic cylinder mechanism fixedly arranged on the central pipe and positioned below the connector mechanism, a slip mechanism which is connected on the central pipe in a sliding manner and is pressed on the outer side of a power output end of the hydraulic cylinder mechanism, a capsule sealing mechanism coaxially and fixedly arranged at the lower end of the central pipe and capable of sealing a sleeve in a well head, an interference sealing mechanism coaxially and fixedly arranged at the lower end of the capsule sealing mechanism and capable of sealing the sleeve in the well head, and a guide mechanism coaxially and fixedly arranged at the lower end of the interference sealing mechanism, wherein the hydraulic oil way is communicated with the hydraulic cylinder mechanism, the hydraulic cylinder mechanism can drive the slip mechanism to move towards a direction close to the capsule sealing mechanism so as to enable the slip mechanism to be locked and fixed on the sleeve in the well head, a first axial through hole communicated with a cavity on the central pipe is formed in the interior of the capsule sealing mechanism, a second axial through hole communicated with the first axial through hole is formed in the interior of the capsule sealing mechanism, and a first axial through hole communicated with the second axial through hole communicated with the first axial through hole communicated with the second axial through hole and fixedly arranged inside the guide mechanism.
2. The plug-in type blowout wellhead crude oil collecting device according to claim 1, wherein the hydraulic cylinder mechanism comprises a hydraulic cylinder shell fixedly arranged on the outer side of the central tube, a piston component which is connected in the hydraulic cylinder shell in a sliding manner and is connected with the outer side of the central tube, and a pushing block which is fixedly arranged at the end part of the piston component and is positioned outside the hydraulic cylinder shell.
3. The plug-in type well blowout wellhead crude oil collecting device as set forth in claim 2, wherein the slip mechanism comprises a slip body and an extrusion member which are sequentially and slidably connected to the central tube from top to bottom, and the bottom of the slip body is slidably connected to the top surface of the extrusion member.
4. The plug-in type well head crude oil collecting device according to claim 3, wherein the capsule sealing mechanism comprises a capsule sealing mechanism body, a rectangular sealing ring fixedly arranged at the top of the capsule sealing mechanism body and at least one capsule sealing ring fixedly arranged at the outer side of the capsule sealing mechanism body and positioned below the rectangular sealing ring, the top surface of the rectangular sealing ring is higher than the top surface of the capsule sealing mechanism body, and the rectangular sealing ring has elasticity so that the rectangular sealing ring can expand and press against a sleeve in a well head to form a seal when the rectangular sealing ring is extruded by the extrusion member.
5. The plug-in type crude oil collecting device for a blowout wellhead according to any one of claims 1 to 4, wherein the interference sealing mechanism comprises an interference sealing mechanism body, an interference check ring fixedly arranged on the outer side of the lower end of the interference sealing mechanism body and used for scraping sundries on a casing in the blowout wellhead, and at least one interference sealing ring fixedly arranged on the outer side of the interference sealing mechanism body and positioned above the interference check ring, wherein the interference sealing ring can form interference connection with the casing in the blowout wellhead to play a role of interference sealing.
6. The plug-in type blowout wellhead crude oil collecting device as set forth in claim 5, wherein the connector mechanism comprises a first connector and a second connector which are relatively fixed at the upper end of the central tube, and the first connector and the second connector are both communicated with the hydraulic oil way.
7. A method for collecting crude oil at a blowout wellhead is characterized in that the method is completed by using the plug-in type crude oil collecting device at the blowout wellhead according to any one of claims 1 to 6, and comprises the following steps: Firstly, determining the type and the size of a field wellhead sleeve, and selecting a matched extension pipeline, a blowout preventer device, a hydraulic valve and a collection pipeline according to the actual field situation; sequentially and fixedly connecting a central pipe, an extension pipeline, a blowout preventer device, a hydraulic valve and a collecting pipeline together, and communicating an outlet of the collecting pipeline with an oil inlet of an existing collecting tank; Step three, connecting the connector mechanism and the hydraulic valve with the hydraulic station through corresponding hydraulic pipelines in the hydraulic station respectively; inserting the plug-in type blowout wellhead crude oil collecting device into a sleeve in a blowout wellhead and placing the plug-in type blowout wellhead crude oil collecting device at a required position according to the actual situation of the site; And fifthly, enabling the power output end of the hydraulic cylinder mechanism to move downwards until the slip mechanism is tightly locked on the inner wall of the sleeve in the blowout wellhead, ensuring that the capsule sealing mechanism and the interference sealing mechanism are tightly sealed on the sleeve in the blowout wellhead, and opening a valve and a hydraulic valve on the blowout preventer device at the moment to collect crude oil.

Description

Plug-in type well blowout wellhead crude oil collecting device and collecting method Technical Field The invention relates to a crude oil collecting technology, in particular to a plug-in type blowout wellhead crude oil collecting device and a collecting method. Background At present, most of the oil fields in China mainly produce crude oil, well sites are located in beach, end islands, farmlands and industrial areas, are close to densely populated villages and towns, high-speed rails and industrial facilities, are easy to cause environmental pollution around the well sites once blowout accidents occur, and the performance of rescue work is seriously affected by the crude oil blowout. At present, when a blowout accident is speeded up, in order to reduce the pollution of crude oil to the environment, an operation surface suitable for the speedup is created, and a blowout wellhead crude oil collecting device is generally required to collect the blown-out crude oil. The utility model provides a blowout wellhead crude oil collection device is a equipment that is used for leaking the crude oil in the oil exploitation in-process collection blowout accident, current blowout wellhead crude oil collection device is usually through reciprocating type piston negative pressure pump suction landing crude oil, but current blowout wellhead crude oil collection device does not have the function of sealed well head, can't collect crude oil under the prerequisite of sealed well head, this makes current blowout wellhead crude oil collection device just can collect crude oil after crude oil blowout and spill in the surrounding environment, this kind of crude oil collection's mode is passive, this increases the risk of blowout crude oil polluted environment, still can influence the efficiency of blowout emergency operation simultaneously. Disclosure of Invention In order to solve the defects in the prior art, the invention aims to provide an inserted blowout wellhead crude oil collecting device and method so as to achieve the purposes of reducing the environmental risk of crude oil pollution and improving the blowout rescue operation efficiency. The plug-in type well blowout wellhead crude oil collecting device comprises a central tube with a hydraulic oil way, a connector mechanism fixedly arranged at the upper end of the central tube and communicated with the hydraulic oil way, a hydraulic cylinder mechanism fixedly arranged on the central tube and positioned below the connector mechanism, a slip mechanism which is connected on the central tube in a sliding mode and is propped against the outer side of a power output end of the hydraulic cylinder mechanism, a capsule sealing mechanism coaxially arranged at the lower end of the central tube and capable of sealing a sleeve in a well blowout wellhead, an interference sealing mechanism coaxially arranged at the lower end of the capsule sealing mechanism and capable of sealing the sleeve in the well blowout wellhead, and a guide mechanism coaxially arranged at the lower end of the interference sealing mechanism, wherein the hydraulic oil way is communicated with the hydraulic cylinder mechanism, the hydraulic cylinder mechanism can drive the slip mechanism to move towards a direction close to the capsule sealing mechanism so as to enable the slip mechanism to be locked and fixed on the sleeve in the well blowout wellhead, the capsule sealing mechanism is internally provided with a first axial through hole communicated with a cavity on the central tube, the sealing mechanism is internally provided with a second axial through hole communicated with the first axial through hole, and the guide mechanism is internally provided with a second axial through hole communicated with the second axial through hole. The hydraulic cylinder mechanism comprises a hydraulic cylinder shell fixedly arranged on the outer side of the central tube, a piston component which is connected in the hydraulic cylinder shell in a sliding manner and is connected with the outer side of the central tube, and a pushing block which is fixedly arranged at the end part of the piston component and is positioned outside the hydraulic cylinder shell. As a further definition of the invention, the slip mechanism comprises a slip body and an extrusion member which are sequentially and slidably connected to the central tube from top to bottom, wherein the bottom of the slip body is slidably connected to the top surface of the extrusion member. As still further defined by the invention, the capsule sealing mechanism comprises a capsule sealing mechanism body, a rectangular sealing ring fixedly arranged at the top of the capsule sealing mechanism body and at least one capsule sealing ring fixedly arranged outside the capsule sealing mechanism body and positioned below the rectangular sealing ring, wherein the top surface of the rectangular sealing ring is higher than the top surface of the capsule sealing mechanism body, and t