Double shaft drilling apparatus with hanger bearings
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-007/06
E21B-004/00
E21B-004/02
E21B-017/03
출원번호
US-0672932
(2012-11-09)
등록번호
US-9309720
(2016-04-12)
발명자
/ 주소
Baugher, Douglas
Chustz, Mark
Rivas, Joe
출원인 / 주소
SCIENTIFIC DRILLING INTERNATIONAL, INC.
대리인 / 주소
Adolph Locklar
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A drilling apparatus includes a housing that defines a longitudinal axis. A power section of the apparatus includes rotor adapted to move with eccentric rotary motion with respect to the longitudinal axis in response to the passage of drilling fluids through the power section. A power transmission s
A drilling apparatus includes a housing that defines a longitudinal axis. A power section of the apparatus includes rotor adapted to move with eccentric rotary motion with respect to the longitudinal axis in response to the passage of drilling fluids through the power section. A power transmission shaft has an upper end coupled to the rotor and movable with the eccentric motion of the rotor, and a lower end constrained to rotate in a concentric manner with respect to the longitudinal axis. A generally rigid torsion rod has upper and lower ends constrained to rotate in a concentric manner, and the upper end of the torsion rod is coupled to the lower end of the power transmission shaft. A mandrel including a connection for a drill bit is interconnected with the lower end of the torsion rod such that a torque may be transmitted from the torsion rod to the mandrel to drive a drill bit.
대표청구항▼
1. A drilling apparatus comprising: a housing defining a longitudinal axis;a power section including a rotor, wherein the rotor is adapted to move with eccentric rotary motion with respect to the longitudinal axis in response to the passage of drilling fluids through the power section;a power transm
1. A drilling apparatus comprising: a housing defining a longitudinal axis;a power section including a rotor, wherein the rotor is adapted to move with eccentric rotary motion with respect to the longitudinal axis in response to the passage of drilling fluids through the power section;a power transmission shaft having an upper end and a lower end, the upper end of the power transmission shaft coupled to the rotor such that the upper end of the power transmission shaft is movable with the eccentric motion of the rotor, and wherein the lower end of the power transmission shaft is constrained to rotate in a concentric manner with respect to the longitudinal axis;a generally rigid torsion rod having an upper end and a lower end, wherein the upper and lower ends of the torsion rod constrained to rotate in a concentric manner with respect to the longitudinal axis, and wherein the upper end of the torsion rod is coupled to the lower end of the power transmission shaft such that a torque may be transmitted from the power transmission shaft to the torsion rod; anda mandrel interconnected with the lower end of the torsion rod by at least one flexible coupling such that the torque may be transmitted from the torsion rod to the mandrel, the mandrel disposed at an oblique angle with respect to the longitudinal axis, the mandrel including a connection for a drill bit. 2. The drilling apparatus according to claim 1, further comprising an upper hanger bearing coupled to the lower end of the power transmission shaft and the upper end of the torsion rod such that the upper hanger bearing constrains the lower end of the power transmission shaft and the upper end of the torsion rod to rotate in the concentric manner. 3. The drilling apparatus according to claim 2, further comprising a lower hanger bearing coupled to the lower end of the torsion rod such that the lower hanger bearing constrains the lower end of the torsion rod to rotate in the concentric manner. 4. The drilling apparatus according to claim 3, wherein the upper and lower hanger bearings each include a generally solid body and a plurality of fins projecting radially therefrom, and wherein voids defined between the fins define flow path for drilling fluid. 5. The drilling apparatus according to claim 2, further comprising an outer radial bearing disposed circumferentially around the upper hanger bearing such that an inner circumferential surface of the outer radial bearing engages an outer circumferential surface of the upper hanger bearing, and wherein the inner circumferential surface of the outer radial bearing includes at least one longitudinal groove formed therein to define flow path for drilling fluid. 6. The drilling apparatus according to claim 1, wherein the power transmission shaft includes at least one of a flexible shaft, CV joint and a knuckle joint. 7. The drilling apparatus according to claim 1, wherein the generally rigid torsion rod further comprises a relatively narrow midsection and the housing further comprises a payload bay disposed adjacent the relatively narrow midsection of the generally rigid torsion rod, and wherein the housing defines a minimum internal diameter adjacent the payload bay. 8. A drilling apparatus comprising: a housing defining a longitudinal axis and a nominal internal diameter, the housing including a relatively narrow section that exhibits a limited internal diameter that is less than the nominal internal diameter;a payload bay disposed adjacent relatively narrow section of the housing;a torsion rod disposed in the relatively narrow section of the housing, the torsion rod supported to rotate concentrically about the longitudinal axis, the torsion rod including a relatively narrow midsection positioned in substantial alignment with the relatively narrow section of the housing;a power section including a rotor, wherein the rotor is adapted to move with eccentric rotary motion with respect to the longitudinal axis in response to the passage of drilling fluids through the power section;a power transmission shaft interconnected between the rotor and the torsion rod, wherein an upper end of the power transmission shaft is movable with the eccentric rotary motion of the rotor, and wherein a lower end of the power transmission shaft is movable with the concentric motion of the torsion rod; anda mandrel for supporting a drill bit coupled to and driven by the torsion rod, the mandrel coupled to the torsion rod by at least one flexible coupling, the mandrel disposed at an oblique angle with respect to the longitudinal axis. 9. The drilling apparatus according to claim 8, wherein the torsion rod is constructed of a generally solid bar. 10. The drilling apparatus according to claim 8, wherein a sensor and data transmission assembly is disposed within the payload bay. 11. The drilling apparatus according to claim 8, further comprising an upper hanger bearing interconnected between the power transmission shaft and the torsion rod, the upper hanger bearing defining an annular flow path for the passage of drilling fluids. 12. The drilling apparatus according to claim 11, further comprising a lower hanger bearing interconnected between the torsion rod and mandrel. 13. The drilling apparatus according to claim 8, further comprising a hanger bearing interconnected between the power transmission shaft and the torsion rod, the hanger bearing defining an interior flow path for the passage of drilling fluids therethrough. 14. A method of operating a drilling apparatus, the method comprising the steps of: providing a power section including a rotor, wherein the rotor is adapted to move with eccentric rotary motion with respect to a longitudinal axis in response to the passage of drilling fluids through the power section;providing a power transmission shaft having an upper end coupled to the rotor and movable with the eccentric rotary motion of the rotor and a lower end constrained to move with concentric rotary motion with respect to the longitudinal axis;providing a torsion bar coupled to the lower end of the power transmission shaft and movable with the concentric rotary motion of the lower end of the power transmission shaft;providing a mandrel coupled to the torsion bar by at least one flexible coupling, the mandrel disposed at an oblique angle with respect to the longitudinal axis, the mandrel rotatable in response to rotation of the torsion bar; andpassing a drilling fluid through the power section to move the rotor, thereby inducing eccentric rotary motion of the upper end of the power transmission shaft, concentric rotary motion of the lower end of the power transmission shaft, concentric rotary motion of the torsion bar, and rotation of the mandrel. 15. The method according to claim 14, further including the step of providing an upper hanger bearing coupled to an upper end of the torsion bar and a lower hanger bearing coupled to a lower end of the torsion bar, the upper and lower hanger bearings adapted to maintain concentric rotation of the torsion bar. 16. The method according to claim 15, further comprising the step of passing the drilling fluid through an annular passageway defined by the upper and lower hanger bearings and by the torsion bar. 17. The method according to claim 14, further comprising the step of passing the drilling fluid through an interior passageway defined through at least one of the upper and lower hanger bearings.
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이 특허에 인용된 특허 (7)
Beshoory Edward Joseph ; Murray William David ; Rohde Heino, Combination drill motor with measurement-while-drilling electronic sensor assembly.
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