Systems and methods for holding wireline device against well

Patent metadata

Field	Value
Publication number	US-10472910-B2
Application number	US-201615392193-A
Country	US
Kind code	B2
Filing date	Dec 28, 2016
Priority date	Dec 28, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A system includes a cable and a toolstring. The toolstring may couple to the cable to enable the toolstring to be placed in a wellbore. The toolstring includes a sensor that can collect measurements relating to the wellbore. An electromagnetic or anchoring device may selectively hold the toolstring or the cable against a surface of the wellbore.

First claim

The invention claimed is:

1. A system comprising:
a cable;
a magnetic device having two halves with one half including an electromagnet, where the two halves come together to form a cylinder over the cable; and
a toolstring configured to be coupled to the cable, wherein the toolstring is configured to be placed in a wellbore, wherein the toolstring comprises a sensor configured to obtain measurements within the wellbore;
wherein the cable or the toolstring, or both, comprise an electromagnetic device configured to selectively hold the toolstring or the cable, or both, against a surface of the wellbore.

2. The system of claim 1 , wherein the electromagnet is coupled directly to the toolstring.

3. The system of claim 1 , wherein the electromagnet is powered by the cable.

4. The system of claim 3 , wherein the magnetic device is powered by insulated magnetic strength members of the cable.

5. The system of claim 1 , wherein the toolstring comprises a tractor device.

6. The system of claim 1 , wherein spacers hold the electromagnet in place on the cable.

7. The system of claim 1 , wherein the cable includes a plurality of magnetic devices, where each magnetic device of the plurality of magnetic devices is spaced apart from an adjacent magnetic device.

8. A method for improving a signal to noise ratio of a signal provided over a cable by a toolstring, comprising:
lowering the cable and the toolstring into a wellbore;
extending at least one arm of a tractor device coupled to the toolstring, wherein the at least one arm comprises a wheel;
engaging the wheel of the tractor device against a surface of the wellbore, wherein engaging the wheel of the tractor device propels the toolstring and the cable into the wellbore;
retracting the at least one arm of the tractor device, wherein retracting the at least one arm disengages the wheel from the surface of the wellbore; and
attaching the toolstring to the surface of the wellbore using a magnetic device coupled to the toolstring;
wherein the magnetic device comprises two halves with one half including an electromagnet, where the two halves come together to form a cylinder over the cable.

9. The method of claim 8 , comprising setting a timer before lowering and activating a device switch, wherein activating the device switch attaches the toolstring to the surface of the wellbore.

10. The method of claim 8 , wherein supplying power to the electromagnet activates the electromagnet, wherein activating the electromagnet attaches the toolstring to the surface of the wellbore.

11. The method of claim 8 , comprising detecting a position of the toolstring with telemetry signals and activating a device switch based on telemetry signals, wherein activating the device switch attaches the toolstring to the surface of the wellbore.

Assignees

• Schlumberger Technology Corp

Inventors

• Varkey Joseph
• Grisanti Maria
• Wanjau Paul
• Kim David
• Underhill William Brian

Classifications

• E21B23/01 Primary

  for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) · CPC title

• E21B47/09

  Locating or determining the position of objects in boreholes or wells {, e.g. the position of an extending arm}; Identifying the free or blocked portions of pipes · CPC title

• E21B23/14 Primary

  for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells · CPC title

• G01V11/005

  Devices for positioning logging sondes with respect to the borehole wall (centralising devices for drilling rods or pipes E21B17/10; setting or locking tools in boreholes E21B23/00; locating objects in boreholes E21B47/09) · CPC title

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title