Stage cementing methods used in casing while drilling
First Claim
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1. A method of cementing a wellbore, comprising:
- drilling the wellbore using an assembly comprising;
a casing, a drilling member coupled to the casing, a float collar coupled to the casing, and a stage tool coupled to the casing;
opening ports in the drilling member;
performing a first cementing operation using the float collar and the open ports, wherein the float collar comprises a one way valve allowing flow of cement through the casing and into an annulus formed between the casing and the wellbore and preventing backflow of the cement into the casing;
opening the stage tool located in the casing;
performing second cementing operation through the open stage tool; and
drilling out the drilling member and the float collar.
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Abstract
Apparatus and methods are provided for a cementing operation for use with a drilling with casing application. In one embodiment, an apparatus is provided for stage cementing using a full opening stage tool. In another embodiment, an apparatus is provided for reverse cementing of the casing.
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Citations
17 Claims
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1. A method of cementing a wellbore, comprising:
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drilling the wellbore using an assembly comprising;
a casing, a drilling member coupled to the casing, a float collar coupled to the casing, and a stage tool coupled to the casing;opening ports in the drilling member; performing a first cementing operation using the float collar and the open ports, wherein the float collar comprises a one way valve allowing flow of cement through the casing and into an annulus formed between the casing and the wellbore and preventing backflow of the cement into the casing; opening the stage tool located in the casing; performing second cementing operation through the open stage tool; and drilling out the drilling member and the float collar. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of cementing a wellbore, comprising:
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drilling the wellbore using a drilling member coupled to a casing; retrieving the drilling member from the casing; pumping cement into the casing and through a one way plug; launching the one way plug behind the cement; pumping fluid behind the plug, thereby propelling the cement through the casing and into an annulus formed between the casing and the wellbore, wherein; pumping is stopped to retain the plug within the casing, and the plug anchors to the casing in response to the pumping stoppage, thereby retaining the cement in the annulus and preventing backflow of the cement into the casing. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of cementing a wellbore, comprising:
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drilling the wellbore using a drilling member coupled to a casing; retrieving the drilling member from the casing; deploying an electric, wire or slick line into the casing; setting a packer in the casing using the line, wherein the packer has a one-way valve; pumping cement through the casing and one-way valve and into an annulus formed between the casing and the wellbore, wherein the one-way valve retains the cement in the annulus and prevents backflow of the cement into the casing; opening a stage tool located in the casing string using the line; pumping cement through the casing and open stage tool and into the annulus; and closing the stage tool using the line. - View Dependent Claims (16)
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17. A method of cementing a wellbore, comprising:
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drilling the wellbore using a drilling member coupled to a casing; performing a first cementing operation; opening a stage tool located in the casing, wherein; the stage tool comprises a housing, a sleeve, an opening seat, and a closing seat, a housing port is aligned with a sleeve port in the open position, and a wall of the sleeve covers the housing port in a closed position; performing a second cementing operation through the open stage tool; and drilling out the seats, wherein the sleeve remains after drill out.
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Specification