Device for measurements on horizontal well

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to drilling horizontal wells for which measurements should be made. Proposed device comprises connectors for connection at well bottom with diagraphy cable arranged inside drill rod carrying said support device, means for communication drill inside with support device outside part. Note here that said communication means are arranged between said probe and said communication means. Proposed device comprises also swinging shutter arranged between communication means and connectors to allow fluid circulation from inside to outside and preventing it circulation from outside to inside of said support device.

EFFECT: higher safety in horizontal diagraphy.

6 cl, 3 dwg

 

The present invention relates to the field of exploitation of hydrocarbon deposits and, in particular, to the field of drilling horizontal wells for which you want to perform measurements in the borehole or to perform geograficheskie measurements of type "logging". The currently used technologies have certain disadvantages in that case, when wells are drilled in rocks, under great pressure, or when control of the appearance of the fluid in this field is difficult. This, in particular, has in some fields of deep or in soils located under water at great depths.

Figure 1 illustrates geograficheskoi measuring system located in a horizontal borehole 1. The supporting element 3 probe contains a covered electric connector 4 connected by means of electric conductors with geograficheskie probes 2. Percussion drilling rod 5, containing at its lower end covering the electrical connector that goes to the column 7 drill rods by means of an electrical cable 6 or so-called geograficheskogo cable. This percussion drill rod and the said cable is moved by a discharge in strongly rejected the portion of the well until the covered electric is a mini-connector support element for the probe. The connection between the two elements of the electrical connector provides electrical continuity of the connection between geograficheskie probes and recording equipment 10, which is located on the surface. After docking covered electrical connector with female electrical connector operators screwing the connector to the side entrance 8 ("side entry sub"), which bypasses biograficheskii cable in the annular space located between the borehole walls and valves. Thus, the translational motion of lowering and/or movement of the probes is performed by attaching or removing the drill rods in the column 11. Position 9 here refers to a commonly used means of overlapping wells, which are equipped with the cylinder bore.

In progress geograficheskih operations using drill rod, the pressure of the fluid in the geological formation is balanced by means of hydrostatic pressure of a fluid medium, in particular drilling mud inside the drill rods and outside of these drill rods.

In case of violation of the above equilibrium can be difficult to control the sudden emission of fluid from the geological formation. The rise of the fluid through the ring p is stranstvo can be controlled by means of an annular sealing system 9.

However, the aforementioned rise of the fluid can also occur through the interior of the drill rods. Indeed, currently used geograficheskie systems allow you to circulate the drilling fluid, in particular for cooling well, to update this mud, to ensure the equilibrium of pressure with passable geological education, as well as inflation and moving percussion drill rod in the inner space of the drill candles. Currently used equipment allows free circulation of the drilling fluid in both directions in the inner cavity of the drill candles.

The technical problem of the invention is to eliminate the risk of a sharp movement in the opposite direction, i.e. in the upward direction, inside the drill rod in the implementation of the horizontal geografii, and this movement may, in particular, to cause the ejection of fluid on the surface ("blowout") or disconnection covered and covering the electrical connectors.

Thus, the present invention relates to a supporting device for geograficheskogo probe, having in its composition connectivity with the ability to connect at the bottom of the well with biograficheskii cable, place aushima in the inner space of the drill rods, on which is fixed the mentioned reference device, means of communication for the fluid between the inner space of the drill rods and the space outside of the device, and the means messages are placed between the probe and the said means of connection. This device contains means located between the message and the means of connection means overlap type check valve, allowing circulation of the fluid from the inside outwards in relation to the reference device and preventing the circulation in the direction from outside to inside, this support device.

Preferably, the means overlap contained tilting the flap.

Preferably also for the means overlap contained the damper piston type.

It is advisable that was provided in a channel that provides the balancing pressure means connection means and electrical connection with the probe.

It is also advisable to return funds held in the closed position, the means overlap.

It is also advisable to provide a means for the lock, holding in the open position, the means overlap.

Preferably, the said means locks were operated manually.

the other characteristics and advantages of the invention will be better understood from the description of the variant of the invention, cited with references to the figures in the drawings, in which:

- Figure 1 schematically illustrates a system in accordance with the prior art;

- Figa and 2b schematically illustrate a support device for a probe in accordance with the invention;

- Figa and 3b schematically illustrate a possible embodiment of the device in accordance with the invention.

On figa presents a schematic view in section of a variant of implementation of the device in accordance with the invention. Position 2 indicated biograficheskii probe mechanically associated with the housing supporting device 3 using commonly used in this case mechanical means, namely flanges, screws or equivalent means. The body support device 3 mounted on the lower end of the tubular valve 12, which provides the ability to manage geograficheskie probes in the well. Means 14 electrical connections include covering the electrical connector 15 connected to the percussion drilling rods, moving in a controlled manner in the interior of the drill rods 12 by means geograficheskogo cable. Shown in Appendix figures covering the electrical connector is joined with the covered electric connector 16 to provide the electricity the Russian connection of the probe 2, moreover, the bundle of electrical conductors 17 passes through the channel 18 to be connected to electrical contact elements 19 with the probe 2. Until the contact elements 19 of the said beam electrical conductors exposed to the same pressure, and means 14 for the connection.

The body support device for probe 3 includes a hole 13 made in the form of lattices or holes of appropriate sizes in order to eliminate internal plugging of the broken rock. Thus, circulation of the drilling fluid in the pumping through the interior of the drill rods 12 can be carried out along the direction shown by arrows 20. This circulation is made to move by inflating covering the electrical connector 15 in order to perform connection or for cleaning wells through the use of appropriate ascending circulation of the fluid in the well.

In accordance with the invention the tool overlap type check valve is inserted between the holes 13 of the circulation and connectivity. This tool overlap is implemented by embedding in the body support device for a probe of the cylinder 22, on which is placed an annular seat 23, which closes the valve 24, the swinging relative to the positive swivel 25. Return spring mounted on a swivel, ensures the retention of the said valve on said seat. Cylinder means overlap joins tight manner to the inner bore of the body support device for a probe. Used in this case, the sealing strip is not presented in the Appendix figures. Thus, the circulation of fluid can be carried out in the internal cavity of the drill rods in the direction towards the outer part of the support device to the probe, whereby the said valve is free in this direction.

On fig.2b illustrated by means of overlapping, closed by flap is pressed against the seat. When this circulation of fluid may not be in the direction from the outer part of the support device for a probe to the interior of the drill rods. Thus, this circulation or circulation in the so-called reverse direction is not possible.

On figa and 3b schematically illustrates another embodiment of the tools overlap, whereby said flap is made in the form of a piston 26, which is capable of moving in the longitudinal direction on the rod 27 in order to free passage under the action of direct circulation or to provide germ is standardize on the Seating surface 28 under the action of the return means and the circulation in the opposite direction.

On figa position 29 marked the stopper that holds the valve in the open position, if it is desirable to use a support device for a probe without giving opportunities means overlap act-type check valve. This stop is set manually before attaching the support device to the probe to drill rods maneuvering. Such a system can also be applied to embodiments of funds overlapping presented on figa and 3b.

1. Supporting device for geograficheskogo probe containing the means of connection made with the possibility to connect at the bottom of the well with biograficheskii cable, located in the inner space of the drill rods, on which is fixed the mentioned reference device, means of communication for the fluid between the inner space of the drill rods and the outer part of the support device, and the means messages are placed between the probe and the said means of connection, a swinging damper, disposed between the means of communications for the fluid and connectivity, providing circulation of the fluid in the direction from the inside to the outside and prevent its circulation in the direction from outside to inside, this support device.

2. The device according to claim 1, which which provides a channel ensuring the balancing of the pressure means connection means and electrical connection with the said probe.

3. The device according to claim 1, in which the repaid funds held in the closed position mentioned swinging gate.

4. The device according to claim 1, which provides a means of locking, retaining in open position mentioned swinging gate.

5. The device according to claim 4 in which the said means of locking is actuated manually.

6. Supporting device for geograficheskogo probe containing an electrical connector configured to be connected at the bottom of the well with biograficheskii cable, located in the inner space of the drill rods, on which is fixed the mentioned reference device, holes messages for the fluid between the inner space of the drill rods and the outer part of the support device, and the said holes messages are placed between the probe and the above-mentioned electric connector, swinging the valve located between the holes messages for fluid and electrical connector providing circulation of the fluid in the direction from the inside to the outside and prevent its circulation in the direction from outside to inside, this support device.



 

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