Floating ball type self-grouting float collar and continuous and uninterrupted casing running method
A self-grouting, floating ball technology, used in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve the problems of time-consuming, reducing the efficiency of casing running into the wellbore, etc. The effect of improving drop-in efficiency
Active Publication Date: 2021-06-22
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This time-consuming process of injecting mud greatly reduces the efficiency of casing running into the wellbore
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] Hereinafter, the floating ball type self-grouting floating hoop and the continuous and uninterrupted casing running method of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
[0041] In the first exemplary embodiment of the present invention, the floating ball type self-grouting floating hoop includes a shell, a ball seat, a floating ball, a sieve plate, a fixing screw sleeve, a shearing part and a normally open flow channel assembly, wherein ,
[0042] The casing is a cylindrical structure, the upper end of the casing body can form a fixed and sealed connection with the lower end of the upper sleeve, and the lower end of the casing body can form a fixed and sealed connection with the upper end of the lower casing. For example, the inner wall of the upper end of the housing can be provided with threads, and the outer wall of the lower end of the housing can be provided with threads, the upper end o...
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
Login to View More Abstract
The invention provides a floating ball type self-grouting float collar and a continuous and uninterrupted casing running method. The floating ball type self-grouting float collar comprises a shell, a ball seat, a floating ball, a sieve plate, a fixed screw sleeve, a top cover, a pressure building ball, a grouting cylinder and a shearing component, the shell is provided with an upper end and a lower end which are connected with an upper casing and a lower casing; the ball seat is fixedly arranged in the shell in a sealing mode and is provided with a first through hole which is axially formed in a penetrating mode; the sieve plate is located below the ball seat, a cavity is formed among the sieve plate, the inner wall of the shell and the ball seat, and a second through hole is axially formed in the sieve plate; the shearing component acts on the ball seat and an overflowing channel assembly, the overflowing channel assembly comprises the grouting cylinder, the pressure building ball, the top cover and a limiting threaded sleeve; and the floating ball is arranged in the cavity, the diameter of the floating ball is larger than that of the first through hole, and the floating ball can float upwards in fluid to form sealing with the lower end of the first through hole. The self-grouting float collar has the advantages of simple structure, easiness in assembly, convenience in use, high safety and reliability and the like.
Description
technical field [0001] The invention relates to the technical field of oil and gas well cementing tools, in particular to a floating ball type self-grouting floating hoop and a continuous and uninterrupted casing running method. Background technique [0002] During cementing operations in oil and gas fields, it is necessary to run casing in the drilled wellbore, and inject cement slurry into the annulus between the casing and the wellbore to seal the casing and the formation. During the process of running the casing, a floating hoop is installed at the bottom of the casing. The conventional floating hoop is a one-way valve, which can only allow the liquid to flow from the inside of the pipe to the outside of the pipe. Therefore, in the process of running the casing, it is necessary to run each section of the casing Just stop and inject mud into the casing to avoid the situation that the buoyancy of the casing in the wellbore is greater than the gravity of the casing and cann...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B34/08
CPCE21B33/13E21B34/08Y02A40/81
Inventor 唐欣张毅超刘运楼张敏王娟谢明李定夏
Owner BC P INC CHINA NAT PETROLEUM CORP