Unlock instant, AI-driven research and patent intelligence for your innovation.

Wellbore cementing system

A wellbore and control system technology, applied in the direction of wellbore/well components, flushing wellbore, drilling automatic control system, etc., can solve the problems of delayed completion of WOC time and increase of completion cost, and achieve the goal of shortening WOC time Effect

Inactive Publication Date: 2021-03-16
SAUDI ARABIAN OIL CO
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Correspondingly, extending the WOC time may delay well completion and may increase the cost of well completion

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
  • Wellbore cementing system
  • Wellbore cementing system
  • Wellbore cementing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Example systems and techniques for cementing a portion of a wellbore are described in this specification. In one example, the casing lines a portion of the wellbore. A pipe called a cement stinger is inserted downhole through the casing and into the unlined portion of the wellbore. At the end of the pipeline, the pipeline includes substructures, called sub-blocks. In this example, the substructure is a shear substructure that includes a shear pin configured for rotation. A pump, which may be located at the surface, forces the cement slurry through the pipes and through the substructure. Cement paste includes capsules containing accelerators. The accelerator reacts with the cement slurry to affect (eg, shorten) the wait-on-set (WOC) or thickening time of the cement slurry.

[0026] The bladder releases the accelerator into the cement slurry, causing the cement slurry to thicken more quickly than a cement slurry of the same composition but without the accelerator. In...

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

An example wellbore cementing system includes a casing to line at least part of a wellbore, and a pipe to introduce cement slurry containing capsules into the wellbore. The capsules include an accelerator. The accelerator reacts with the cement slurry to affect a thickening time of the cement slurry. The example system also includes a substructure having shearing pins. The substructure is arrangedto receive the cement slurry from the pipe. The substructure is configured rotate to break at least some of the capsules in the cement slurry.

Description

technical field [0001] The present description generally relates to example systems and techniques for cementing a portion of a wellbore. Background technique [0002] During the construction of an oil or gas well, a drill string with drill bits drills holes through soil, rock, and other materials to form the wellbore. The drilling process includes, among other things, pumping drilling fluid down the wellbore and receiving returned fluids and materials from the wellbore at the surface. Part of the well construction process includes incorporating casing and production tubing into the wellbore. The casing supports the sides of the wellbore and protects the components of the well from external contaminants. The casing can be cemented in place. [0003] After the borehole reaches a certain depth, the drilling equipment may be removed from the borehole, leaving an extended borehole. An isolation barrier may be formed in the extended bore of the wellbore. The isolation barrie...

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 & Authority Applications(China)
IPC IPC(8): E21B33/14C09K8/467
CPCC04B28/02C04B40/0641E21B33/14C09K8/467C04B12/04C04B22/124C04B2103/10E21B21/10E21B33/05E21B44/005
Inventor Z·萨拉维O·R·塞萨赫
Owner SAUDI ARABIAN OIL CO