Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Petroleum expansion pipe hanger and construction technology

A technology of expansion pipe and hanger, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of insufficient suspension force, seal leakage, etc.

Active Publication Date: 2009-11-11
SHANGHAI GLOBE PETRO EQUIP
View PDF7 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above problems, the present invention proposes a new oil expansion pipe hanger, which solves the problems of insufficient suspension force and seal leakage of the existing hanger, and the drilling fluid circulation, mud injection and suspension connection processes are completed at one time

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
  • Petroleum expansion pipe hanger and construction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] In the figure, the expansion tube hanger is composed of a drill string, an expansion suspension body, a length-adjusting rotary sleeve set, an expansion launch chamber and a liner connection. , Push-pull central tube 9 and bearing nut 14 are formed. Adjust the connection between the upper box of the righting nipple and the pin of the upper drilling tool, and the connection of the lower pin and the box of the transitional drill pipe, and adjust the relative position of the lengthening swivel through the thread. The male buckle at the lower end of the transition drill rod is connected with the female buckle at the upper end of the push-pull center pipe. The lower step of the push-pull central tube is equipped with an expansion head, and the expansion head is compressed by the bearing nut group. The middle part of the push-pull center tube is equipped with a push piston through a traction cap. Said expansion tube suspension body is made up of sleeve pipe 1, suspension pi...

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 relates to a device which enables two petroleum casing pipes with different diameters to be hanged and connected by expanding the casing pipes underground, and a construction technology.The device comprises a drilling string, an expansion pipe hanging body, a length-adjusting scroll cover set, an expansion transmitting room and a tail pipe connection pair and is characterized in that the drilling string consists of an adjusting-centering pipe nipple, a transition drill pipe, a push-pull central pipe and a bearing screw cap; the expansion pipe hanging body consists of a casing pipe, a hanging pipe, a hanging projection and a hanging rubber ring; the length-adjusting scroll cover set consists of a length-adjusting scroll cover and a clamping nut; the expansion transmitting room consists of a pull cap, a propelling piston, an expansion head, an upper expansion pipe cavity body, a lower expansion pipe cavity body, a steel ball, a transmitting seat, an O-shaped seal rig and acirclip for a hole; and the tail pipe connection pair consists of a lower expansion pipe, a tail pipe connection hoop and tail pipes. The invention has the advantages that hanging modes of hydraulicpush, lubrication expansion head and hard and soft combination are adopted, thereby having reliable tightness and strong hanging capability; and circulation of drilling fluid, injection of cement paste and hanging connection can be completed in one construction, and thereby convenient operation is achieved.

Description

technical field [0001] The invention belongs to the connection between pipelines, and in particular relates to a connection device for suspending and connecting two kinds of oil casing pipes with different diameters by expanding and expanding the casing pipes downhole. Background technique [0002] In oil drilling and special well-type construction, multi-layer casings are run in, and the casings of the same specification are usually connected by threads; while casings of different diameters are connected by suspension, this suspension device is called a hanger. [0003] At present, a kind of mechanical rail hanger is widely used. Due to the limitation of connection space and the lack of structural design, this kind of hanger often shows insufficient suspension force when used, and the suspension claws often break and fall off, causing the suspended tailpipe to fall into the well, resulting in Accidents; in addition, there is another fatal weakness, the mechanical rail hange...

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
IPC IPC(8): E21B23/00
Inventor 刘洁陈涛梅华刘文西陈志义陈玉如
Owner SHANGHAI GLOBE PETRO EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products