A DOWNHOLE TOOL AND DOWNHOLE SYSTEM
A downhole tool (1) for insertion into a casing (2) having a lateral (3) extending from a main casing, the ma in casing having a first diameter (D1) and the lateral having a second diameter (D2), the first diameter being larger than the second diameter, the downhole tool comprising a tool body having a first tool end and a second tool end and a tool width, a wire-line (8) connected with the first end of the tool body, a wireline guide device (9) arranged at least partly around the wireline, wherein the wireline is movably arranged with in the wireline guide device, and the guide device is releasably connected (activated by 25) with the tool body. The present invention furthermore relates to a downhole system and to a method for guiding a wireline of a downhole tool as described above.
The present invention relates to a downhole tool for insertion into a casing having a lateral extending from a main casing. The present invention furthermore relates to a downhole system and to a method for guiding a wireline of a downhole tool as described above.
BACKGROUND ARTFrom time to time, operations need to be performed in wells downhole. This type of operation, such as the opening or closing of a sliding sleeve, is often performed by means of a downhole wireline tool. In the event that the sliding sleeve is arranged in a lateral or side track, the wireline tool is diverted into the lateral and the wireline of the wireline tool is forced against the edge formed between the main part of the casing and the lateral. As the wireline tool moves forward in the lateral, the wireline slides against the edge and is torn and frayed. A wireline performing many jobs may thus eventually be damaged to such an extent that it cannot be reused for further operations.
SUMMARY OF THE INVENTIONIt is an object of the present invention to wholly or partly overcome the above disadvantages and drawbacks of the prior art. More specifically, it is an object to provide an improved downhole wireline tool which is capable of preventing the wireline from being damaged as the tool moves forward in the well.
The above objects, together with numerous other objects, advantages, and features, which will become evident from the below description, are accomplished by a solution in accordance with the present invention by a downhole tool for insertion into a casing having a lateral extending from a main casing, the main casing having a first diameter and the lateral having a second diameter, the first diameter being larger than the second diameter, the downhole tool comprising:
-
- a tool body having a first tool end and a second tool end and a tool width,
- a wireline connected with the first end of the tool body, and
- a wireline guide device arranged at least partly around the wireline, wherein the wireline is movably arranged within the wireline guide device, and the guide device is releasably connected with the tool body.
In addition, the wireline guide device may have a transport position and a guide position, the wireline guide device having a width which is larger than the second diameter of the lateral at least in the guide position.
Also, the wireline guide device may have a first width in the transport position and a second width in the guide position, the first width being smaller than the second width.
The first width may be equal to or smaller than the tool width.
Further, the wireline guide device may be arranged fully surrounding the wireline.
Moreover, the wireline guide device may comprise a first part and a second part, the first part extending in a first direction and the second part extending in a second direction, defining an angle between the parts.
Also, the first part may be longer than the second part in the guide position.
The wireline guide device may comprise a first part and a second part, each part having a first part end and a second part end, and the first part ends may be joined or connected and define an angle between the parts.
The angle in the transport position may be smaller than the angle in the guide position.
Furthermore, the angle in the transport position may be smaller than 90°.
In addition, the first part may, in the transport position, be connected with the tool body.
The wireline guide device may have a through-going opening in which the wireline extends, the opening having a diameter which is larger than a diameter of the wireline.
Also, the wireline guide device may comprise a spring for ensuring that the angle is larger than 20°.
Furthermore, a spring may be arranged in the connection between the first part and the second part.
Moreover, the first part may be extendable in a longitudinal direction thereof.
Additionally, the first part may comprise a spring for extending the first part in the longitudinal direction.
Further, the second end of the first and second parts may have a rounded shape.
The wireline guide device may be expandable from the first width to the second width, the second width being larger than the diameter of the lateral.
In addition, the wireline guide device may comprise an inflatable element.
Also, the wireline guide device may be configured as a disc or a cone.
Furthermore, the downhole tool may comprise a pump for inflating the wireline guide device.
Also, the wireline guide device may comprise a guide body part, and at least a first arm and a second arm, the first and second arms each comprising a first arm part and a second arm part, the first and second arm parts each having a first arm part end and a second arm part end, the first arm part ends of the arm parts being rotatably connected with the guide body part, and the second arm part ends of each arm part being rotatably connected with each other.
The guide body may comprise a first body part and a second body part, the first body part being displaceably connected with the second body part.
Also, the first body part may be threadingly connected with the second body part.
Moreover, the first arm parts may be slidably connected with the guide body.
In addition, the wireline guide device may have an outer face, and a magnet may form part of the outer face.
Further, the wireline guide device may be disconnectable from the tool body by means of a contact.
The contact may be an electronic contact or a mechanical contact.
Furthermore, the tool body may comprise an activation means for activating the contact in order to release the wireline guide device.
The downhole tool as described above may further comprise a lateral locator.
Also, the lateral locator may comprise an activation means for activating the contact and/or expanding the wireline guide device.
Additionally, a sensor may be arranged in the lateral locator.
The present invention also relates to a downhole system comprising:
-
- a casing having a lateral extending from a main casing, and
- a downhole tool according to the invention.
The present invention further relates to a method for guiding a wireline of a downhole tool as described above, comprising the steps of:
-
- inserting the downhole tool into the casing,
- locating the lateral,
- positioning the wireline guide device in a transition area between the main casing and the lateral, and
- guiding the wireline through the wireline guide device at the transition area for ensuring that a distance is provided between the wireline and the transition area when the downhole tool is present in the lateral.
The method as described above may further comprise the step of activating the wireline guide device from the first width to the second width when locating the lateral.
The invention and its many advantages will be described in more detail below with reference to the accompanying schematic drawings, which for the purpose of illustration show some non-limiting embodiments and in which
All the figures are highly schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the invention, other parts being omitted or merely suggested. Especially, the angle between the main casing and the lateral is not as large as in most wells as illustrated in the drawings.
DETAILED DESCRIPTION OF THE INVENTIONThe wireline guide device 9 has a width wd which is larger than the second diameter of the lateral in the guide position, as shown in
In
The wireline guide device 9 has a transport position, shown in
In
In another embodiment, the guide body part 14 may comprise a first body part 39 and a second body part 40, the first body part being displaceably connected with the second body part, as shown in
In
In
As shown in
The invention further relates to a downhole system 100, as shown in
By a casing is meant any kind of pipe, tubing, tubular, liner, string etc. used downhole in relation to oil or natural gas production.
The downhole tractor may have projectable arms having wheels 27, wherein the wheels contact the inner surface of the casing for propelling the tractor and the tool forward in the casing. A downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.
Although the invention has been described in the above in connection with preferred embodiments of the invention, it will be evident for a person skilled in the art that several modifications are conceivable without departing from the invention as defined by the following claims.
Claims
1. A downhole tool for insertion into a casing having a lateral extending from a main casing, the main casing having a first diameter and the lateral having a second diameter, the first diameter being larger than the second diameter, the downhole tool comprising: wherein the wireline is movably arranged within the wireline guide device, and the guide device is releasably connected with the tool body.
- a tool body having a first tool end and a second tool end and a tool width,
- a wireline connected with the first end of the tool body, and
- a wireline guide device arranged at least partly around the wireline,
2. A downhole tool according to claim 1, wherein the wireline guide device has a transport position and a guide position, the wireline guide device having a width which is larger than the second diameter of the lateral at least in the guide position.
3. A downhole tool according to claim 1, wherein the wireline guide device has a first width in the transport position and a second width in the guide position, the first width being smaller than the second width.
4. A downhole tool according to claim 1, wherein the wireline guide device comprises a first part and a second part, the first part extending in a first direction and the second part extending in a second direction, defining an angle between the parts.
5. A downhole tool according to claim 4, wherein the first part is longer than the second part in the guide position.
6. A downhole tool according to claim 3, wherein the wireline guide device is expandable from the first width to the second width, the second width being larger than the diameter of the lateral.
7. A downhole tool according to claim 6, wherein the downhole tool comprises a pump for inflating the wireline guide device.
8. A downhole
- tool according to claim 1, wherein the wireline guide device comprises a guide body part, and at least a first arm and a second arm, the first and second arms each comprising a first arm part and a second arm part, the first and second arm parts each having a first arm part end and a second arm part end, the first arm part ends of the arm parts being rotatably connected with the guide body part, and the second arm part ends of each arm part of each arm being rotatably connected with each other.
9. A downhole tool according to claim 1, wherein the wireline guide device has an outer face, and a magnet forms part of the outer face.
10. A downhole tool according to claim 1, wherein the wireline guide device is disconnectable from the tool body by means of a contact.
11. A downhole tool according to claim 1, further comprising a lateral locator.
12. A downhole tool according to claim 11, wherein the lateral locator comprises an activation means for activating the contact and/or expanding the wireline guide device.
13. A downhole system comprising:
- a casing having a lateral extending from a main casing, and
- a downhole tool according to claim 1.
14. A method for guiding a wireline of a downhole tool according to claim 1, comprising the steps of:
- inserting the downhole tool into the casing,
- locating the lateral,
- positioning the wireline guide device in a transition area between the main casing and the lateral, and
- guiding the wireline through the wireline guide device at the transition area for ensuring that a distance is provided between the wireline and the transition area when the downhole tool is present in the lateral.
15. A method according to claim 14, further comprising the step of activating the wireline guide device from the first width to the second width when locating the lateral.
Type: Application
Filed: Dec 6, 2013
Publication Date: Nov 5, 2015
Inventors: Jørgen HALLUNDBÆK (Græsted), Tomas Sune ANDERSEN (Helsingør), Lars MANGAL (Hellerup)
Application Number: 14/647,608