Method and apparatus for continuous raising and lowering joints of pipe
First Claim
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1. A system for continuously raising and lowering joints or stands of pipe, comprising:
- at least two lifting and lowering device pairs, each having a top section and bottom section and which are vertically disposed beside a well bore;
a holding device and a rotating device connected to the top section of each lifting and lowering device;
a power source to actuate the lifting and lowering devices, a pivoting device, the holding device and the rotating device connected to each lifting and lowering device;
a transfer device to remove or introduce pipe; and
means to transfer power to the above devices; and
an energy storage means.
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Abstract
A method and apparatus for lifting and lowering of pipe continuously, during the drilling, repair or maintenance of wells, without interruption to connect or disconnect pipe.
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Citations
16 Claims
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1. A system for continuously raising and lowering joints or stands of pipe, comprising:
- at least two lifting and lowering device pairs, each having a top section and bottom section and which are vertically disposed beside a well bore;
a holding device and a rotating device connected to the top section of each lifting and lowering device;
a power source to actuate the lifting and lowering devices, a pivoting device, the holding device and the rotating device connected to each lifting and lowering device;
a transfer device to remove or introduce pipe; and
means to transfer power to the above devices; and
an energy storage means. - View Dependent Claims (2, 3, 4, 5, 6)
- at least two lifting and lowering device pairs, each having a top section and bottom section and which are vertically disposed beside a well bore;
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7. A method of continually lowering pipe in a well drilling, maintenance or repair operation, comprising;
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a.) providing a system comprising;
at least two lifting and lowering device pairs, each having a top section and bottom section, and capable an extended and contracted configuration and which are vertically disposed beside a well bore;
a holding device and a rotating device connected to the top section of each lifting and lowering device;
a power source to actuate the lifting and lowering devices, a pivoting device, the holding device and the rotating device connected to each lifting and lowering device;
a transfer device to remove or introduce pipe;
means to transfer power to the above devices; and
an energy storage means;b.) placing a first pipe section vertically above a well bore; c.) activating the holding devices of a first pair of lifting and lowering devices in an extended configuration to engage the pipe placed above the well bore; d.) causing the lifting and lowering devices of b.) to move to a contracted position, thus lowering the attached pipe and activating rotating devices and activation the rotating devices to cause threaded sections of the pipe to connect to a threaded coupling. - View Dependent Claims (8, 9, 10, 11)
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12. A method of continually lifting a pipe in a well drilling, maintenance or repair operation, comprising;
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a.) providing a system comprising;
at least two lifting and lowering device pairs, each having a top section and bottom section, and capable an extended and contracted configuration and which are vertically disposed beside a well bore;
a holding device and a rotating device connected to the top section of each lifting and lowering device;
a power source to actuate the lifting and lowering devices, a pivoting device, the holding device and the rotating device connected to each lifting and lowering device;
a transfer device to remove or introduce pipe;
means to transfer power to the above devices; and
an energy storage means;b.) placing a pipe section vertically above a well bore; c.) activating the holding devices of one pair of lifting and lowering devices in a contracted configuration to engage the pipe placed above the well bore; d.) causing the lifting and lowering devices of b.) to move to an extended position, thus raising the attached pipe and activating rotating devices and activating the rotating devices to cause threaded sections of the pipe to connect to a threaded coupling. - View Dependent Claims (13, 14, 15, 16)
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Specification