# US 2014/0151127 A1 · Control mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151127 A1 - Document ID: US20140151127A1 - Status: Published application - Kind: A1 - Application number: 14/122,079 - Filed: 2012-05-24 - Published: 2014-06-05 - Earliest claimed: 2011-05-24 - Assignees: Flexidrill Limited - Applicants: Flexidrill Limited - Inventors: Gregory Donald West; Peter Evan Powell - Web page: https://patentgrep.com/patent/US20140151127A1 ## CPC - E21B 4/16: Plural down-hole drives, e.g. for combined percussion and rotary drilling (E21B4/10 takes precedence); Drives for multi-bit drilling units - E21B 4/02: Fluid rotary type drives - E21B 4/06: Down-hole impacting means, e.g. hammers (boring rams E21B11/02) - E21B 34/10: operated by control fluid supplied from outside the borehole - F01C 1/101: {Moineau-type} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) ## Abstract The use in a drillstring of a positive displacement motor (PDM) with both an output upwardly and an output downwardly to devices spaced at least by the PDM. ## Claims ### Claim at position 1 1-22. (canceled) ### Claim 23 A dual output positive displacement motor (PDM) comprising: (i) a stator surround, (ii) a single PDM rotor located within the surround; (iii) a first take-off extending from a first end of the PDM rotor for providing rotational output to a first tool, and (iv) a second take-off extending from a second end of the PDM rotor for providing rotational output to second tool. ### Claim 24 A downhole assembly forming part of a drilstring, or to be part of a drillstring, said assembly comprising or including: (i) a stator surround, (ii) a single positive displacement motor (PDM) rotor located within the surround; (iii) a first take-off extending from a first end of the PDM rotor for providing rotational output to a first tool, and (iv) a second take-off extending from a second end of the PDM rotor for providing rotational output to second tool. ### Claim 25 (depends on 24) The downhole assembly according to claim 24 wherein: the first take-off provides downward rotational output to the first tool, and the second take-off provides upward rotational output to the second tool. ### Claim 26 (depends on 24) The assembly according to claim 24 as part of a drillstring. ### Claim 27 (depends on 23) The assembly of claim 23 wherein the PDM rotor is rotated by fluid flow, the fluid being drilling mud. ### Claim 28 (depends on 27) The assembly according to claim 27 wherein a downhole valve is able to attenuate the fluid flow to the PDM rotor and/or through the PDM rotor. ### Claim 29 (depends on 24) The downhole assembly according to claim 24 wherein: the first tool is a vibratory tool or a rotary tool, and the second tool is a vibratory tool. ### Claim 30 (depends on 29) The assembly of claim 29 wherein the vibratory tool relies upon interacting magnets to generate vibration. ### Claim 31 (depends on 29) The assembly of claim 29 wherein the vibratory tool does not rely upon interacting magnets to generate vibration. ### Claim 32 (depends on 23) The assembly of claim 23 when used in one or more of the following downhole activities: drilling milling reaming core drilling scale removal sand control/screen setting cementing. ### Claim 33 A drillstring assembly having a bit, and having a downfeed in use of drilling mud or other fluid; the assembly being wherein at least part of the fluid acts through a single positive displacement motor (PDM) having a single PDM rotor within a stator surround in use to cause rotation of the PDM rotor; and being further characterised in that the PDM rotor has a first take-off that provides downwardly a rotational output to a first tool downwardly of the PDM rotor, or to the bit and has a second take-off that provides upwardly a rotational output to a second tool upwardly of the PDM rotor. ### Claim 34 (depends on 33) The drillstring assembly according to claim 33 wherein at least one of the tools is a vibratory tool or rotary tool. ### Claim 35 (depends on 34) The drillstring assembly according to claim 34 wherein one of the tools is a vibratory tool and the other tool is a rotary device or there is an output to the bit. ### Claim 36 (depends on 34) The drillstring assembly according to claim 34 wherein the vibratory tool has complementary magnetic arrays and requires a rotational input to create relative rotation between magnetic arrays to generate magnetic array interactions. ### Claim 37 (depends on 34) The drillstring assembly according to claim 34 wherein the rotary tool is one or more of: a bit, a core bit, a reamer, a hammer/impacting bit assembly, a reamer, a power generator, a vibratory or hammer device/tool requiring relative rotation. ### Claim 38 (depends on 33) The drillstring assembly according to claim 33 when used in one or more of the following downhole activities: drilling milling reaming core drilling scale removal sand control/screen setting cementing. ### Claim 39 (depends on 23) The use in a drillstring of a positive displacement motor (PDM) device as claimed in claim 23, provided as a single unit, to have both an output upwardly and an output downwardly rotating as a consequence of the fluid driven drive of the PDM device and thereby providing a drive each to one of two (or both) devices spaced at least by the PDM. ### Claim 40 (depends on 39) The PDM according to claim 39 wherein the uphole output is for coupling to an in casing device and/or the downhole output is for coupling to an in casing device. ### Claim 41 An apparatus having a control mechanism for a fluid to be provided downhole as a pressurised stream, the mechanism allowing pressurised fluid to bypass or not, whether wholly or in part, and whether through or about, a downhole rotary output(s) generator so that it can be treated as turned off or on. ### Claim 42 (depends on 41) The apparatus of claim 41 wherein such off/on output(s) is (are) able selectively to rotationally control a downhole axially oscillating device, such a device including a magnetic component that rotates responsive to the selected output and a second magnetic component that is rotationally constrained and is forced to oscillate. ### Claim 43 A control mechanism that works in conjunction with downhole tools which generate rotary output(s) as a result of a pressurised drilling fluid input whereby; the control mechanism allows pressurised fluid to bypass (or not) through the rotary generation tool so that the tool is able to be turned off or on, such a device is then able to rotationally activate a downhole axially oscillating device, such a device including a cam/wobble plate or other, a compliant member that transmits rotational torque and controls an axially oscillating mass in both compression and tension.