CN210483620U - Cable-passing wellhead blowout preventer - Google Patents
Cable-passing wellhead blowout preventer Download PDFInfo
- Publication number
- CN210483620U CN210483620U CN201921038507.0U CN201921038507U CN210483620U CN 210483620 U CN210483620 U CN 210483620U CN 201921038507 U CN201921038507 U CN 201921038507U CN 210483620 U CN210483620 U CN 210483620U
- Authority
- CN
- China
- Prior art keywords
- cable
- blowout prevention
- prevention box
- gasket
- wellhead
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- 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.)
- Expired - Fee Related
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- 230000002265 prevention Effects 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 description 15
- 239000012530 fluid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000017488 activation-induced cell death of T cell Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model discloses a cable-passing wellhead blowout preventer, which comprises a blowout preventer box, a gasket, a plurality of rubber rings and a cable pressure cap, wherein the blowout preventer box is of a pipe body structure, and the lower end of the blowout preventer box is arranged on a wellhead; the gasket is limited on a step on the inner wall of the blowout prevention box, and a bayonet is formed on the gasket so as to be clamped on the cable conveniently; the rubber rings are arranged in the blowout prevention box, are sequentially stacked on the gasket and are compressed by the cable pressing cap. The utility model discloses small, light in weight, simple process, operation are swift, the installation of being convenient for, the practicality is strong, and application scope is extensive, and manufacturing cost and construction cost are low, the facilitate promotion, and application prospect is extensive.
Description
Technical Field
The utility model belongs to the technical field of oil gas well test technique and specifically relates to a cable formula well head blowout preventer passes.
Background
The cable test of oil and gas well is the important work of oil and gas field development. For new oil extraction processes such as AICD automatic water control layered oil extraction, DFT downhole fluid automatic identification layered oil extraction, downhole electric control intelligent separated oil extraction, non-flowing well liquid production profile test and the like which are implemented in oil field research at home and abroad, the layered output effect test after automatic water control measures are adopted or the liquid production profile test is particularly important. By adopting the CDT non-flowing well drainage test process, the evaluation of the liquid production effect and the test of the liquid production profile in the underground drainage process can be realized. The CDT non-flowing well drainage test adopts the oil pipe to drive a special underground test hollow pump into a preset well depth, and a setting packer seals the annular space of an oil sleeve. And a logging cable and an underground logging instrument are put into the oil pipe, penetrate through the oil pipe and the underground hollow pump and reach the upper part of the separate production valve or the upper part of a production layer. Power fluid is injected through the annular space, formation drainage is achieved, and the downhole instrument is driven through the cable to conduct layered liquid production profile testing. When the injected power fluid and formation fluid are produced from the oil pipe, pressure exists in a wellhead, and for safety testing and environment-friendly testing construction, a downhole testing instrument crossing wellhead blowout preventer needs to be installed on the wellhead. The conventional wellhead cable blowout preventer has the disadvantages of long-term connection on a cable, large volume, heavy weight, and difficult and complicated construction and installation. If other operations which do not need blowout prevention cables are needed, the cables need to be cut off and the cable caps need to be disassembled. When the cable is installed each time, the cable is cut off, the rope cap is disassembled, the choke tube is penetrated, and the faucet is riveted, so that the process is very complicated. Furthermore, conventional wellhead wireline blowout preventers must be installed on the wireline in advance, requiring flowing fluids to effect wellhead sealing and wireline lubrication. In the non-flowing well liquid discharge test process, no fluid exists in the well mouth when the cable is pulled out of the instrument, if the traditional blowout preventer is adopted, the cable is pulled out of the instrument and is in a dry grinding state, the cable can seriously abrade the wellhead blowout preventer, and the blowout preventer greatly abrades and damages the cable.
Disclosure of Invention
An object of the utility model is to solve above-mentioned technical problem and provide a cable formula well head blowout preventer that installs conveniently and the practicality is strong.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a cable-passing wellhead blowout preventer comprises a blowout preventer box, gaskets, a plurality of rubber rings and a cable pressure cap, wherein the blowout preventer box is of a pipe body structure, and the lower end of the blowout preventer box is installed on a wellhead; the gasket is limited on a step on the inner wall of the blowout prevention box, and a bayonet is formed on the gasket so as to be clamped on the cable conveniently; the rubber ring is arranged in the blowout prevention box, stacked on the gasket in sequence and compressed tightly by the cable pressing cap, wherein each rubber ring is vertically penetrated in the middle to form a center hole for a cable to pass through, a notch is formed in the side end of each center hole in the radial direction to enable the cable to enter the center hole smoothly, the cable pressing cap is in threaded connection with the upper port of the blowout prevention box, a through hole for the cable to pass through is formed in the middle of the cable pressing cap, and an opening is formed in the side end of the through hole in the radial direction to enable the cable to enter the through hole smoothly.
Further, the upper part of the blowout prevention box is formed with internal threads so as to be connected with a cable gland, the lower part of the blowout prevention box is formed with external threads, and the external threads are connected with a tubing coupling, so that the blowout prevention box can be installed on a wellhead.
The utility model has the advantages that:
the inner diameter of the over-cable type wellhead blowout preventer is consistent with the inner diameter of an oil pipe, so that an underground instrument can pass through and be lifted conveniently. The wellhead blowout preventer has the advantages of small volume, light weight, easy installation and disassembly and convenient construction, and can meet the wellhead cable blowout prevention operation of the pressure sealing requirements of wellhead static sealing less than 15MPa and dynamic sealing less than 8 MPa.
Compared with a conventional wellhead cable blowout preventer, the wellhead blowout prevention rubber ring is assembled after the instrument passes through the blowout prevention box without cutting off the cable in the installation process. Need not to install well head blowout preventer in advance on the cable, other operations can be implemented at any time to the cable car, have increased the utilization ratio of cable car, have increased the efficiency of logging construction by a wide margin. The utility model discloses small, light in weight, simple process, operation are swift, the installation of being convenient for, the practicality is strong, and application scope is extensive, and manufacturing cost and construction cost are low, the facilitate promotion, and application prospect is extensive.
Drawings
FIG. 1 is a schematic structural view of the cable-type wellhead blowout preventer of the present invention;
fig. 2 is a schematic structural view of a T-shaped assembling and disassembling tool.
Detailed Description
The invention will be described in further detail with reference to the following drawings and detailed description:
as shown in fig. 1, the utility model discloses a cable formula well head blowout preventer includes preventing spouting box 1, gasket 2, a plurality of rubber circle 3 and cable pressure cap 4.
The blowout prevention box 1 is of a pipe body structure, an internal thread 11 is formed on the inner wall of the upper portion of the blowout prevention box, an external thread 12 is formed on the outer wall of the lower portion of the blowout prevention box, and a step is further arranged on the inner wall of the blowout prevention box. Wherein the connection of the external threads 12 to the tubing collar enables the blowout preventer to be installed on a wellhead.
The gasket 2 is of an oblate structure, the outer diameter of the gasket is matched with the inner diameter of the blowout prevention box 1, the gasket is installed in the blowout prevention box 1 and limited on a step, and a bayonet 21 is formed on the gasket 2 so as to be clamped on a cable conveniently.
The rubber rings 3 are arranged in the blowout prevention box 1 and are sequentially stacked on the gasket 2 and are compressed by the cable gland 4. The rubber ring 3 is of an oblate structure and plays a role in sealing, and the outer diameter of the rubber ring is matched with the inner diameter of the blowout prevention box 1. A central hole 31 for a cable to pass through is formed in the middle of each rubber ring 3 in a vertically penetrating manner, and a cut 32 is formed at the side end of each central hole 31 in the radial direction so that the cable can smoothly enter the central hole 31.
The cable gland 4 is connected with the internal thread 11 of the upper port of the blowout preventer 1, a through hole 41 for the cable to pass through is formed in the middle of the cable gland 4, and an opening 42 is radially formed at the side end of the through hole 41 so that the cable can smoothly enter the through hole 41.
As shown in fig. 2, there is shown a T-shaped assembling and disassembling tool, which comprises a T-shaped frame 51 and a pipe 52 with an opening, wherein the lower end of the T-shaped frame 51 is eccentrically fixed on the upper end of the pipe 52. This T word assembly and disassembly tools mainly used rubber circle 3's installation compresses tightly.
Before the underground testing instrument enters a well, the blowout prevention box 1 is installed at a well mouth, after the underground testing instrument passes through the blowout prevention box 1, the gasket 2 is clamped on a cable and placed into the blowout prevention box 1, then the rubber rings 3 are placed into the blowout prevention box 1 one by one and are pressed by a T-shaped dismounting tool. Quantitative butter is injected into every 2 rubber rings 3, and the quantitative rubber rings 3 are filled according to different pressures. The higher the wellhead pressure that needs to be sealed, the greater the number of rubber rings 3 installed. After the rubber ring 3 is installed, the cable pressing cap 4 is installed on the upper portion of the blowout prevention box 1 and is slowly screwed down, and the rubber ring 3 is tightly pressed. The degree of compaction is adjusted according to the pressure of the well and the weight of the downhole instruments, with higher pressures and heavier instruments, greater degrees of compaction.
In summary, the present invention is not limited to the above embodiments, and those skilled in the art can provide other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.
Claims (2)
1. An over-cable wellhead blowout preventer, characterized in that: the blowout prevention device comprises a blowout prevention box, a gasket, a plurality of rubber rings and a cable pressing cap, wherein the blowout prevention box is of a pipe body structure, and the lower end of the blowout prevention box is installed on a wellhead; the gasket is limited on a step on the inner wall of the blowout prevention box, and a bayonet is formed on the gasket so as to be clamped on the cable conveniently; the rubber ring is arranged in the blowout prevention box, stacked on the gasket in sequence and compressed tightly by the cable pressing cap, wherein each rubber ring is vertically penetrated in the middle to form a center hole for a cable to pass through, a notch is formed in the side end of each center hole in the radial direction to enable the cable to enter the center hole smoothly, the cable pressing cap is in threaded connection with the upper port of the blowout prevention box, a through hole for the cable to pass through is formed in the middle of the cable pressing cap, and an opening is formed in the side end of the through hole in the radial direction to enable the cable to enter the through hole smoothly.
2. The cable wellhead blowout preventer of claim 1, wherein: the upper part of the blowout prevention box is provided with internal threads so as to be connected with a cable pressing cap, and the lower part of the blowout prevention box is provided with external threads which are connected with a tubing coupling, so that the blowout prevention box can be installed on a wellhead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921038507.0U CN210483620U (en) | 2019-07-04 | 2019-07-04 | Cable-passing wellhead blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921038507.0U CN210483620U (en) | 2019-07-04 | 2019-07-04 | Cable-passing wellhead blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210483620U true CN210483620U (en) | 2020-05-08 |
Family
ID=70529804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921038507.0U Expired - Fee Related CN210483620U (en) | 2019-07-04 | 2019-07-04 | Cable-passing wellhead blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210483620U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338905A (en) * | 2021-06-08 | 2021-09-03 | 太平洋远景石油技术(北京)有限公司 | Pumping method and tubular column of horizontal well tester |
-
2019
- 2019-07-04 CN CN201921038507.0U patent/CN210483620U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338905A (en) * | 2021-06-08 | 2021-09-03 | 太平洋远景石油技术(北京)有限公司 | Pumping method and tubular column of horizontal well tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201230 Address after: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 300457 Tianjin Binhai New Area Development Zone Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200508 |