A special tool for deep water testing and calibration

A special tool and depth calibration technology, applied in the field of deep water testing tools, can solve the problems of pipe string safety risks, large depth calibration errors, and large depth errors, so as to reduce risks and accidents, avoid large errors, and ensure safety.

Active Publication Date: 2018-01-23
CHINA NAT OFFSHORE OIL CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the conventional semi-submersible platform tests the depth of the pipe string, the pipe string is hung on the wear-resistant core of the underwater wellhead, and the wellhead realizes the heave compensation of the pipe string by pulling the compensation rope; for deep water testing, the pipe string When adjusting the depth of the string, because the string above the mud surface is too heavy to sit on the wellhead for anti-wear and core filling, it is necessary to carry out the depth calibration while lifting the string on the traveling block, which makes it impossible to use the conventional compensation rope to lift the string Shen compensation, the crown block and ground pulley block can not be relatively static, so the accuracy of the calibration data cannot be confirmed
There are two approaches to this problem in the world: one is to use the slips at the wellhead, and use the average value of multiple calibration data to select the depth. If this method causes a large depth error when the platform heave is large ; The second is to use the resistance display of the plug-in test string as a mark, and print the depth of the pipe string at this time to match the length of the pipe string. When , the error of the pipe string is also very large, and it also brings potential risks to the safety of the pipe string
The depth correction errors caused by the above two methods are very large. Therefore, when meeting the high-standard depth correction error, it is necessary to develop a special tool for deep water test string wellhead calibration to solve the large depth correction error of deep water test strings. The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A special tool for deep water testing and calibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Such as figure 1 As shown, a special tool for deep water testing and depth correction described in this embodiment includes an upper airtight buckle 1 for connecting the upper pipe string of the puppet, an upper puppet body 2, an integral lifting lug 3, and a lower thickening short The joint body 4 and the lower gas-tight buckle 5 used to connect the lower pipe string of the nipple, the upper nipple body 2 and the lower thickened nipple body 4 are an integrated structure, and the integral lifting lug 3 is set on the upper nipple The joint body 2 is locked by the top screw 6, the upper airtight buckle 1 and the lower airtight buckle 5 are used to connect the upper and lower pipe strings of the pup joint, and play a sealing role.

[0014] Wherein, in this embodiment, the inner diameter of the upper sub-section body 2 and the lower thickened sub-section body 4 are the same, the outer diameter of the lower thickened sub-joint body 4 is larger than the outer diameter of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a special tool for deep water testing and depth correction, which comprises an upper airtight buckle for connecting the upper pipe string of a sub, an upper sub body, an integral lifting lug, a lower thickened sub body and a sub body for connecting the sub The lower gas-tight buckle of the lower pipe string, the upper sub-section body and the lower thickened sub-section body are an integrated structure, and the integral lifting lugs are set on the upper sub-section body and locked by jacking screws. Due to the adoption of the above-mentioned structure, the present invention can be fixed on the test pipe string to heave together when the depth of the deep water test pipe string of the conventional semi-submersible platform is corrected under the deep water sea conditions, so as to avoid the occurrence of the data caused by the depth correction data of the test pipe string. Larger errors, and ensure the safety of the test string, reducing risks and accidents. In addition, the present invention also has the advantages of simple operation and convenient maintenance.

Description

technical field [0001] The invention relates to the technical field of deep water test tools, in particular to a special tool for deep water test depth correction. Background technique [0002] When the conventional semi-submersible platform tests the depth of the pipe string, the pipe string is hung on the wear-resistant core of the underwater wellhead, and the wellhead realizes the heave compensation of the pipe string by pulling the compensation rope; for deep water testing, the pipe string When adjusting the depth of the string, because the string above the mud surface is too heavy to sit on the wellhead for anti-wear and core filling, it is necessary to carry out the depth calibration while lifting the string on the traveling block, which makes it impossible to use the conventional compensation rope to lift the string Shen compensation, the crown block and the ground pulley block can not be relatively static, so the accuracy of the school depth data cannot be confirmed....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): E21B47/00
Inventor张崇李祝军徐斐颜帮川王尔钧孟文波方满宗黄亮王成林陈文武张建王应好刁欢刘平
OwnerCHINA NAT OFFSHORE OIL CORP