Drill shoe
First Claim
1. An earth removal apparatus, comprising:
- a first body portion;
a second body portion at least partially to receivable within the first body portion;
a profile formed on an outer surface of the second body portion; and
a cutting member releasably connectable with the profile, wherein the connection is releaseable along at least two axis and the profile is adapted to maintain the cutting member on the profile during operation.
9 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for a drilling with casing includes therewith a drill shoe configured for later drilling through thereof in situ, with cutters retainable thereon in response to the forces encountered during borehole drilling, yet moveable from the envelope through which the later drill shoe will pass when cutting through the in situ drill shoe. The drill shoe includes one or more profiles thereon, into which blades carrying the formation drilling cutters are disposed. The profiles include at least one projection thereon, which is received within a mating slot in the blades. The blades also may be configured to have opposed sections which are configured with respect to one another to have an included angle of less than ninety degrees.
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Citations
43 Claims
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1. An earth removal apparatus, comprising:
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a first body portion; a second body portion at least partially to receivable within the first body portion; a profile formed on an outer surface of the second body portion; and a cutting member releasably connectable with the profile, wherein the connection is releaseable along at least two axis and the profile is adapted to maintain the cutting member on the profile during operation. - View Dependent Claims (2, 3, 4, 5)
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6. An earth removal apparatus, comprising:
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a drillable body portion; at least one profile formed on an outer surface of the drillable body portion, the at least one profile includes a projection formed on a portion thereof; and a blade releasably connectable with the at least one profiles wherein the connection is releasable along at least two axis. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A drill bit, comprising:
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a first body portion; a drillable second body portion; at least one profile formed integral with at least one of the first body portion and the drillable second body portion, the at least one profile having at least two opposed segments having a discernable orientation; a cutting member received in the at least one profile and having the discernable orientation; and the discernable orientation including an included angle between the opposed segments of less than ninety degrees. - View Dependent Claims (20, 21, 22, 23)
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24. A method of drilling with casing, wherein a drillable drill bit is provided, comprising:
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providing a drill bit support at a lower end of the casing; locating a drillable body portion within the drill bit support; providing a blade receiving member, integral with at least one of the drill bit support and the body portion, the receiving member including a profile; positioning a blade having a mating profile on the receiving member; and using the drill bit to form a wellbore, wherein the profile is adapted to substantially maintain the blade on the blade receiving member during drilling. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A method of completing a wellbore, comprising:
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providing an earth removal apparatus at a lower of a drill string, the earth removal apparatus having; first body portion; and a drillable portion disposed in the first body portion, the drillable portion including a bore; forming the wellbore; blocking the bore from fluid communication; moving the drillable portion relative the first sleeve portion; and re-establishing fluid communication between an inner portion of the earth removal apparatus and the wellbore. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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37. A downhole valve, comprising:
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a first body portion; a bore disposed through the first body portion; and an obstruction member retainer at least partially disposed in the bore, the obstruction member retainer including a first seating surface and a second seating surface adapted to cooperate with an obstruction member that is movable from engagement with the first seating surface into engagement with the second seating surface, wherein the obstruction member retainer and the obstruction member interact to provide selective fluid communication through the bore. - View Dependent Claims (38, 39, 40, 41)
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42. A downhole valve, comprising:
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an obstruction member having a first position engagable with a first seating surface in an obstruction member retainer and a second position engagable with a second seating surface in the obstruction member retainer; and a biasing member biasing the obstruction member to the second position. - View Dependent Claims (43)
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Specification