Rotating rod string position adjusting device
First Claim
1. A device for longitudinally adjusting the position of a rotating rod string, having an upper end and a lower end, in a production well of the type having a downhole rotary pump connected to the lower end of the rod string, means for driving the rotary pump by rotating the rod string, and a lower clamp operably connected to the driving means and releasably fixable near the upper end of the rod string in order to connect the driving means to the rod string and in order to support the rod string in the well such that operation of the driving means rotates the lower clamp which rotates the rod string, the device comprising:
- (a) a tubular first sleeve having a threaded surface, an upper end and a lower end for removably mounting on the lower clamp such that a portion of the rod string is contained within the first sleeve and rotation of the lower clamp by the driving means rotates the first sleeve;
(b) a tubular second sleeve having an upper end, a lower end and a threaded surface for engaging the threaded surface of the first sleeve, the second sleeve mounted and threadably engaged with the first sleeve to permit telescoping of the second sleeve relative to the first sleeve; and
(c) an upper clamp mounted on the upper end of the second sleeve and releasably fixable to the rod string for supporting the rod string in the well so that while the lower clamp is released from the rod string and the upper clamp is fixed to the rod string, operation of the driving means rotates the lower clamp and the first sleeve such that the second sleeve telescopes relative to the first sleeve until the rod string is longitudinally adjusted within the well by longitudinal movement of the upper clamp resulting from the telescoping of the second sleeve relative to the first sleeve.
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Accused Products
Abstract
The invention relates to a method and a device for longitudinally adjusting the position of a rotating rod string, having an upper end and a lower end, in a production well of the type having a downhole rotary pump connected to the lower end of the rod string, means for driving the rotary pump by rotating the rod string, and a lower clamp operably connected to the driving means and releasably fixable near the upper end of the rod string such that operation of the driving means rotates the lower clamp which rotates the rod string. The device is comprised of a tubular inner sleeve having a threaded outer surface and a lower end for removably mounting on the lower clamp such that the rod string is contained therein and rotation of the lower clamp by the driving means rotates the inner sleeve. A tubular outer sleeve having an upper end and a threaded inner surface is mounted about and threadably engaged with the inner sleeve. An upper clamp is mounted on the upper end of the outer sleeve and is releasably fixable to the rod string so that while the lower clamp is released from the rod string and the upper clamp is fixed to the rod string, operation of the driving means rotates the lower clamp and the inner sleeve such that the outer sleeve telescopes relative to the inner sleeve until the rod string is longitudinally adjusted within the well by longitudinal movement of the upper clamp.
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Citations
30 Claims
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1. A device for longitudinally adjusting the position of a rotating rod string, having an upper end and a lower end, in a production well of the type having a downhole rotary pump connected to the lower end of the rod string, means for driving the rotary pump by rotating the rod string, and a lower clamp operably connected to the driving means and releasably fixable near the upper end of the rod string in order to connect the driving means to the rod string and in order to support the rod string in the well such that operation of the driving means rotates the lower clamp which rotates the rod string, the device comprising:
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(a) a tubular first sleeve having a threaded surface, an upper end and a lower end for removably mounting on the lower clamp such that a portion of the rod string is contained within the first sleeve and rotation of the lower clamp by the driving means rotates the first sleeve; (b) a tubular second sleeve having an upper end, a lower end and a threaded surface for engaging the threaded surface of the first sleeve, the second sleeve mounted and threadably engaged with the first sleeve to permit telescoping of the second sleeve relative to the first sleeve; and (c) an upper clamp mounted on the upper end of the second sleeve and releasably fixable to the rod string for supporting the rod string in the well so that while the lower clamp is released from the rod string and the upper clamp is fixed to the rod string, operation of the driving means rotates the lower clamp and the first sleeve such that the second sleeve telescopes relative to the first sleeve until the rod string is longitudinally adjusted within the well by longitudinal movement of the upper clamp resulting from the telescoping of the second sleeve relative to the first sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for longitudinally adjusting the position of a rotating rod string, the rod string having an upper end and a lower end, in a production well of the type having a downhole rotary pump connected to the lower end of the rod string, means for driving the rotary pump by rotating the rod string, and a lower clamp operably connected to the driving means and releasably fixed near the upper end of the rod string in order to connect the driving means to the rod string, and in order to support the rod string in the well such that operation of the driving means rotates the lower clamp which rotates the rod string, the method using a device comprised of a tubular first sleeve having a threaded surface, an upper end and a lower end for removably mounting on the lower clamp, a tubular second sleeve having an upper end, a lower end and a threaded surface for engaging the threaded surface of the first sleeve, the second sleeve mounted and threadably engaged with the first sleeve to permit telescoping of the second sleeve relative to the first sleeve, and an upper clamp mounted on the upper end of the second sleeve and releasably fixable to the rod string, the method comprising the steps of:
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(a) mounting the device on the well by mounting the lower end of the first sleeve on the lower clamp such that a portion of the rod string is contained within the first sleeve and rotation of the lower clamp by the driving means rotates the first sleeve; (b) fixing the upper clamp to the rod string; (c) releasing the lower clamp from the rod string such that the upper clamp supports the rod string in the well; and (d) operating the driving means in order to rotate the lower clamp and the first sleeve such that the second sleeve telescopes on the first sleeve until the rod string is longitudinally adjusted within the well by longitudinal movement of the upper clamp resulting from the telescoping of the second sleeve relative to the first sleeve. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification