KR20120048622A - Downhole device - Google Patents

Abstract

The apparatus is used in technical operation during drilling well formation. This apparatus functions as a sealing apparatus by using the sealing part 5. The seal 5 divides the drilling well into an upper cavity 16 and a lower cavity 17. The seal 5 comprises a collet 7 comprising a segment 8, a liner 10, a spring 11 and a casing 6. The segment 8 can be separated upon interaction with the drilling rig (drilling column 19) and has an additional seal 9. The casing 6 is located in the lower part of the collet 7 and allows the movement of the segment 8 during separation. The seal 5 is located in the housing 1 in which the threads 2, 3 are formed. The housing 1 is fixed in the roller bearing 4. The device can interact with the drilling equipment at installation and move to open the channel 13 of the fluid connection between the drilling opening, the upper cavity, the lower cavity and the production layer. This technical solution can be performed in any drilling well forming operation, can prevent the inflow of formation fluid, increase the productivity of the drilling well, and if the drilling well formation does not cause layer imbalance, Is performed.

Description

Downhole Device {DOWNHOLE DEVICE}

The present invention applies to the oil and gas industry and can be used for technical operations regarding the formation of wells.

Safety valves for leak-free shutoff of well bore in oil and gas well operation are available from the Russian patent RU No. 2312203 C2, E21B34 / 06; Russian Patent RU No. of November 27, 2007 2311526 C2, E21B34 / 06; Russian Patent RU No. of February 20, 2007. 2293839 C1, E21B34 / 06; Russian Patent RU No. of August 20, 2004. 2234595 C1, E21B34 / 10; Russian Patent RU No. of February 20, 2004. 2224087 C2, E21B34 / 06; Russian Patent RU No. of August 27, 2001. 2172815 C1, E21B34 / 06; Russian Patent RU No. of June 27, 2001. 2169829 C1, E21B34 / 06; Russian Patent RU No. of December 10, 2000. 2160357 C2, E21B34 / 06; Russian Patent RU No. of January 27, 2000. 2145024 C1, E21B34 / 08; Russian Patent RU No. of June 10, 1998. 2112863 C1, E21B34 / 06; Russian Patent RU No. of March 20, 1998. 2107152 C1, E21B34 / 06; Russian Patent RU No. of October 27, 1997. 2094593 C1, E21B34 / 06; Russian Patent RU No. of October 15, 1994 2021490 C1, E21B34 / 06; Russian Patent RU No. of April 30, 1994 2011797 C1, E21B34 / 06; Russian Patent RU No. of September 10, 2003. 32183 U1, E21B34 / 06; Russian Patent RU No. of October 10, 2002. 25527 U1, E21B34 / 06; Russian Patent RU No. of March 10, 2002. 22174 U1, E21B34 / 06.

Known downhole shutoff devices are characterized by a significant reduction in flow channel diameter compared to producing well diameter.

In addition, a sealer with a sealing element with hydraulic drives, a protector comprising a housing, is disclosed in the Russian patent RU No. dated August 20, 2007. 2304693 C2, E21B33 / 06; Russian Patent RU No. of January 27, 1999 2125643 C1, E21B33 / 06; Russian Patent RU No. of May 10, 2004. 37762 U1, E21B34 / 06.

A rotating preventer comprising a housing, a rotating shaft with a sealing element, a rotating assembly and a chevron seal is disclosed in Russian patent RU No. 27 January 1995. 2027847 C1, E21 B33 / 06; Russian Patent RU No. of October 10, 2008. 76961 U1, E21B33 / 06.

A rotating universal hydraulic preventer comprising a housing having a cavity and a central opening, a cover having an opening, a bearing, a shell, and a sealing element located in the shell, is a Russian patent RU dated July 10, 2003. No. 2208126 C2, E21B33 / 06; Russian Patent RU No. of May 30, 1994 2013 519 C1, E21B33 / 06; Russian Patent RU No. of May 27, 2005. 45770 U1, E21B33 / 06.

Known anti-rotation devices provided in the drilling well opening have an overall dimension significantly exceeding the drilling well diameter; This does not overlap the cross sections perfectly.

An anti-rotation tool comprising a housing, a bearing assembly, an axis that rotates within the bearing assembly, and a sealing device connected to a drilling device, is disclosed in Russian patent RU No. 20 of December 2008. 2341643 C1, E21B33 / 06.

This technical solution is accepted as the "closest analog" of the present invention.

This "most similarly shaped" preventive sealing device is made in the form of a spacer ring with a groove on the inner surface and is located in a coupling connecting the drill string and the kelly stem. The groove in the spacer ring is connected with the inner cavity of the coupling. With this coupling the drill string is lowered into the drilling well and the drill pump is activated; At this time, the sealing device is kept extended with respect to the axis under the action of the drill fluid pressure.

However, the sealing device of the "most similar form" of the guard seals the drilling aperture opening in the drilling operation and such sealing is possible only under the action of the drill fluid, which limits the performance of another process operation.

The “most similar form” guard belongs to a device for sealing the drilling well opening during drilling.

The present invention solves the problem of extending the performance of the process operation, provides conditions for any operation in forming the drilling well without loss of the flow channel diameter by more normative values, and prevents the introduction of formation fluids. And increase drilling productivity.

According to the present invention such a problem is provided; Bearing assembly; And a borehole device comprising a sealing device connected with borehole equipment.

This device functions as a sealing device by using a sealing part.

The seal separates the drilling well into an upper cavity and a lower cavity, with a fluid connection between the drilling well opening and the upper cavity and between the lower cavity and the production layer, respectively.

The seal has a collet with segments in the lower part and is made detachable upon interaction with the drilling rig and has additional seals on the sides, liners on the outer surface, springs and lower parts. A casing positioned within and providing an arrangement of the segments in its separation.

The seal is fixed in the bearing assembly and located in the housing with the upper thread.

The device further includes an adjustment insert that can interact with the drilling equipment in its installation and move to open a channel of fluid connection between the drilling opening, the upper cavity, the lower cavity and the production layer.

The present invention features a number of optional features. In other words,

The bearing assembly comprises an oil-filled sealed bearing;

The liner is made of a strong flexible material;

The lower thread is additionally made on the housing.

Applicant has not identified any sources that contain data of the same technical solution as the apparatus described herein.

Therefore, the applicant has a view that the present invention satisfies the "newness" (N) criterion.

The technical result at hand includes a collet located in a housing fixed within the bearing assembly and having a segment in the lower part that is detachable upon interaction with the drilling rig and sealed by a seal separating the drilling rig into the upper cavity and the lower cavity. With the aid of the proposed device made as a device, it is the practice of technical operation in drilling well formation without the occurrence of an overbalance on the productive deposits by the washer fluid column.

This technical result cannot be achieved from the known features, and the Applicant claims that the technical solution applied meets the "progressive" (IS) criterion.

The implementation of the technical solutions applied is confirmed by research, development and experimentation; The downhole device of the present invention is made of assemblies and components widely used in the oil and gas production industry; Applicant claims that it satisfies the "Industrial Availability" (IA) criterion.

In addition to the technical solutions applied to the present invention will be described below by the description of the embodiments with reference to the accompanying drawings.

1 is a general view showing a downhole device,
2 is a sectional view showing a downhole device;
3 is a sectional view showing a collet segment;
4 is a sectional view showing a downhole device in a set position;
5 shows a well in a running state;
6 is a cross-sectional view along the line AA of FIG.
7 is a diagram illustrating a drilling well having a downhole device.

A borehole device, ie a downhole device, comprises a housing 1, a bearing assembly 4 and a seal 5.

This apparatus functions as a sealing apparatus by using the sealing part 5.

The seal 5 is provided with a drilling well in the upper cavity 16 and the lower cavity 17 with a fluid connection between the well opening and the upper cavity and between the lower cavity and the producing formation, respectively. ).

The seal 5 comprises a funnel shaped collet 7. In the lower part the collets 7 in the casing 6 are closely fitted to one another and comprise segments 8 which can be separated and have additional seals 9 on the sides. The collet 7 includes a liner 10 on its outer surface. The liner 10 is made of a strong flexible material. The collet 7 comprises a spring 11. The casing 6 is located in the lower part of the collet 7 which provides an arrangement of the segment 8 upon its detachment. The space between the seal 5 and the casing 6 is filled with grease.

The seal 5 is fixed in the bearing assembly and located in the housing 1 with the upper thread 2. The bearing assembly comprises an oil filled sealed bearing 4. The lower thread 3 is made in the housing 1 for installation of the device between the pipes of the casing string 18, if necessary.

The device further includes an adjustment insert 12. The control insert 12 can interact with the drilling equipment at its installation, for example with a drill string 19, and the channel of fluid connection between the drilling well opening, the upper cavity, the lower cavity and the production layer. (13) can be moved to open.

The apparatus further includes a drill-through cover 14. The drill-through cover 14 is made of an easily drillable material, for example d16.

The process operation in forming the drilling estimate is performed using the apparatus as follows.

A locating insert 12 is installed in the seal 5. The space between the seal 5 and the casing 6 is filled with grease to prevent destruction of the casing 6 under external pressure during the descent of the device into the drilling well 15.

The housing 1 of the device is connected by an upper thread 2 and a lower thread 3 together with a pipe of the string 18 located below. The casing string 18 with the device is lowered into the drilling well.

The process operation of fixing the drilling estimate 15 is then performed.

The drill string 19 is lowered to the device and the positioning insert 12 is then pushed out by pressing, so that the drill-through cover 14 is broken.

The segments 8 of the collet 7 are separated and the channel 13 of the fluid connection between the drilling well opening, the upper cavity, the lower cavity and the production layer is opened. The casing 6 provides a guaranteed space for the positioning of the separate segment 8.

The drill string 19 is lowered to the production burial layer.

After performing the process operation of the drilling rig 15 excavated according to the project, the drill string 19 is removed from the drilling rig 15.

After the drill bit 20 exits the seal 5, the collet 7 is under the action of its own potential energy, as well as under the action of the spring 11 and the liner 10. It takes the "closed" position, thereby closing the channel 13 of the fluid connection and separating the upper cavity 16 and the lower cavity 17 of the drilling well 15.

If continuous operation of drilling rig 15 is required, the drill string 19 is lowered in a similar manner through the device.

If another process operation is performed, for example a tail pipe (not shown) or the descent of other equipment, the device supports its installation and operation in the required mode.

Completion of the device with the housing, bearing assembly and seals allows it to be lowered with the casing string, to be located inside the drilling well, and to perform any process operation during drilling well formation without any diameter loss.

The installation of a device in the drilling pit on the production burial floor, operated on a "normally closed" principle and opened by an external drive to pass the drilling rig, results in an unbalanced development of the production burial floor. If performed without the occurrence of overbalance, it is an essential step to form a drilling estimate.

The usefulness of the collet in the seal, which provides the opening of the channel of the fluid connection between the drilling well opening, the upper cavity, the lower cavity and the production layer, and the interaction with the drilling equipment, is, if necessary, the formation of the formation fluids. Prevent ingress;

The proposed downhole device has more normative values for the performance of process operations during drilling rig formation without loss of flow channel diameter, for the prevention of layer fluid ingress, and for research, development and experimentation, and for the oil and gas production industry. Applicants have the view that they meet the "Industrial Availability" (IA) criterion, as they can be used in the application of widely used and industrially manufactured assemblies and known components.

1: housing
2: upper thread (of housing)
3: lower thread (of housing)
4: oil-filled sealed bearing
5: Seal (in the housing 1)
6: casing (of housing)
7: Collet (of sealing part 5)
8: segments (of the collet 7)
9: additional seal (on side of segment 8)
10: liner (on outer surface of collet 7)
11: spring (of collet 7)
12: locating insert
13 channels of hydraulic connection
14 drill-through cover
15: Well Estimation
16: Upper cavity (of drilling estimate 15)
17: Lower cavity (of drilling estimate 15)
18 casing string
19: drill string
20 drill bit

Claims (4)

housing; Bearing assembly; And a seal connected to the well equipment,
The sealing of this device is provided by a seal,
The seal separates the drilling well into the upper cavity and the lower cavity, with a fluid connection between the drilling well opening and the upper cavity and between the lower cavity and the production layer, respectively,
The seal has a collet with segments in the lower part and can be separated upon interaction with the drilling rig and is located in an additional seal on the side, a liner on the outer surface, a spring and the lower part Has a casing providing an arrangement of segments at separation,
The seal is fixed in the bearing assembly and located in a housing having an upper thread;
The device is further provided with a positioning insert which can interact with the drilling equipment at installation and moveable to open the channel of fluid connection between the drilling opening, the upper cavity, the lower cavity and the production layer. Ball device. The method according to claim 1,
The bearing assembly comprises an oil filled sealed bearing. The method according to claim 1,
The liner device is made of a strong flexible material. The downhole device of claim 1, wherein the lower thread is additionally provided in the housing.

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