SU1752924A1 - Core barrel - Google Patents

Abstract

Usage: drilling exploration wells with coring. The column projectile has a body, which is equipped with a core-receiving tube with core breaking elements in the form of plungers, with a chamber filled with an insulating core composition, and with a propellant formed by a pair of pistons connected by a pipeline with an overflow channel. When placing a waste valve on the displacer channel, the latter, by the action of a fluid flow, squeezes the composition out of the chamber and at the same time pushes the core elements. 1 hp ff, 5 ill.

Description

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The invention relates to mining, in maternity to the technique of drilling exploration wells with vkernap selection.

| Known coring tools for {drilling with the creation of local drilling circulation, containing porous, pre-destructive tools, an ejector pump, a flow divider and a core; a receiving pipe with longitudinal channels placed along its periphery, I which communicated with the diffuser | ejector pump, and the other part - | with the discharge chamber of the flow divider.

 A disadvantage of the known devices is the impossibility of separately feeding into the cavity of the core tube.

washing liquid and a reagent that isolates the core from the washing liquid

A well-known coring tube containing the case with a rock-breaking, tool, a core-receiver tube with a gripper | a head, core breakers, and a chamber with an insulating core composition, connected to the core tube by peripheral underwater channels, and a propellant.

A disadvantage of the known core slug is that in the process of separation from the massif and ascent to the surface, the core is not protected from the damaging effects of the surrounding

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environment, so that the projectile is unreliable in operation.

The purpose of the invention is to increase reliability. . .

Improving the reliability of the projec- tion is to comprehensively isolate the core with a fast-hardening polymer and tear the core away from the plunger wedge holes of the casting elements.

The goal is achieved by the fact that in the core tube, comprising a housing with rock-breaking tools, a core receiving tube with a gripping head, core breaking elements and a chamber with an insulating core,. peripheral submersible kana / shmi and propellant connected to the core tube. core receiver (coarse is made with radial channels in the lower part, and core breaking elements are made in the form of plunger located in the radial channels of the core receiver pipe communicating with the underwater channels, while the scaffold is installed in the case above the core receiver and made in the form of a pair the pistons connected by a pipeline with a bypass channel, having a saddle for the discharge valve and a radial outlet between the pistons, and the body space between the displacer and the core receiver tube is filled with liquid in the volume The displacer is provided with a slips for connecting to the gripping head and protrudes for interacting with the overshoot .. Fig. 1 shows a projection of the drilling process, a general view, a longitudinal section (the arrows indicate the direction of fluid motion); .2, - .to; in the process of core capture; in Fig. 3 — section A-A in Fig. 1; in Fig. K, section B-B in Fig. 1.; in Fig. 5 - fragment of axonometric projection of the projectile cavity when polymer is wrapped around the core.

 The columnar shell comprises a housing

1s longitudinal underwater channels,

2d the passage of flushing fluid to the bottom of the well, communicating via the outlet openings 3 to the cavity of the body i and the closures. ; On the outer surface of the outer pipe 1 between the channels 2, along the cylinder-forming parts, there are also underwater channels-tanks 5 for curing 5

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reagent 6, blocked at both ends by caps 7 and communicated by the outlet openings 8 with the cavity of the chamber

. Ca 1, made to the nickname of the holes 3 by a certain amount, depending on the size of the container between the head 9 of the core receiver tube 10 and the lower piston 11 of the displacer. The displacer also includes the upper piston 12 and the perforated pipeline 13 connecting them with the bypass channel 1 having a seat 15 under the discharge valve 16. The apertures 3 are located between the pistons 11 and 12. The upper piston 12 of the displacer has an annular gripping head 17 for interaction with the overshot, and the lower piston 11 - the slips 18 for connection with the gripping head 19 at the upper end of the adapter 20 of the core receiver tube 10. The adapter 20 has a recess 21 in which the channels 22 are open from the cavity of the core receiver tube 10,

5 provided with a check valve 23. The cavity of the undercut 21 communicates with the annulus by the openings 2k in the housing 1 between the underwater channels

2 and 5.. -, -, i about i. :

Top covers 7 channels 5 with -. Screws by rods 25 for holding J pistons 2b below holes 8. In the lower radial holes connecting the cavities of the channels 5 with the cavity of the outer pipe 1 between the lower end of the core straight pipe 10 with the upper end of the column bit 27, the armature-J wedge elements 2 are placed in as channels with channels 29 on the side surfaces. Core lifter pipe 10 is enclosed in an elastic sleeve 30, on its inner surface is made, inclined helical grooves-31. Extrude 5 stop-stop in the extreme upper position with shear pin 32 and its pistons 11 and 12 and adapter 20 j are fitted with sealing rings 33 i In the cavity of the core receiver, 10

0: place the sleeve 3 of the wound paper (figure 5). In the free areas outside the housing 1 between the channels 2 above the channels 5, the blades 35 are attached to turbulize the ascending

from the current of the washing liquid and improvement of the cleaning conditions of the bottom, In the tank. m @ w ith with the adapter 20 of the core receiver tube 10 and the piston 11 accommodates a predetermined flush volume.

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petroleum based liquids 36 for squeezing reagent 6 out of channels, 5. The column projectile is operated as follows. . .: ..-; ...

Before lowering the projectile into the well, well, from the channels 5, the upper ones are removed: both the lower covers 7 and the rubber pistons 26, and the tear elements 28 are sunk into the channels 5 until they stop. Then the lower covers 7 are fixed and fixed with pins, and in The sheath / capacity of channel 5 is filled with a reagent (for example, Haysel-OH TA 1, which is a hydrophilic hardening polymer), where the pistons 26 are then lowered and the top covers 7 with rods 25, which are also fixed with pins, are inserted. .. Then into the body cavity .1 equipped with a coring bit 27 is set core tube 10 in the elastic sleeve 30 with adapter 20 and sleeve 3 in its cavity against the stop with the bottom end of the protruding ends of the rivets 28. Non-hardening drilling fluid 36 is poured into the resulting container in housing 1 (for example, PHO or IER, or another reagent to create, for example, a three component mixture).

Due to the seal 33, the solution is securely held in the container. After that, the displacer in the form of two pistons 11 and 12 is lowered into the cavity of the outer pipe 1 and secured with a shear pin 32. The column device thus assembled is lowered into the well on the drill string. The rotation of the projectile is carried out by a rotor or a downhole motor. In the latter case, it is necessary to provide a pocket between the engine and the projectile to accommodate the ball valve 16.

When drilling, the flushing fluid (through the central channel in displace 25

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le, the holes in the perforated pipe 13, the holes 3 in the housing 1 and the longitudinal underwater channels 2

 enters the face, clearing it from I sludge and carrying it along the annular pro

: to the surface surface, to which f are located outside of the body: 1 turbulators 35. Part of the flow of washing fluid from the bottom enters the cavity of the core tube 10, helping to improve the conditions for forming and moving the core in the pipe 10. From the cavity of the pipe 10 this

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part of the fluid flow, the valve 23, through the channels 22 in the adapter 20 and the holes 2 in the housing 1. is released into the annulus, mixing. with the main stream. :. . .

After the end of the drilling of a certain interval of ekv; azhin, the ball valve 16 is lowered into the extension of the drill pipe (in the case of using a booster engine, the valve is pushed out of the pocket), which sits in the saddle 15 of the upper piston 12 displacer. . ...; ..; -.,. The subsequent pumping of the washing liquid cuts the pin .32 and the displacer moves down, displaces the solution 36 through the holes 8 into the channels 5. The pressure of the solution 36 displaces the pistons 26, creating pressure in the cavity of the channels and this penetrates the core 28 into the cavity of the core tube 10, division core from / for. Reagent 6 is then squeezed into the cavity of the core receiver tube 10 through channels 29 in the tearing elements 28, enveloping the glass core from all sides, creating an impermeable shell. Then the screen is removed to the surface. On the surface of the cavity of the housing 1, the displacer and the core receiver tube 10 are removed by hooking the protrusion 17 on the upper piston 12 of the propellant, which is connected to the gripping head 19 of the core receiver adapter 20 by means of a clamp 18. The core is extracted from the core receiver 10 along with the sleeve 3, which prevents the core from connecting to the walls of the pipe 10. After this, the core drilling cycle is repeated.

The use of the proposed device will make it possible to increase the yield of core 5 due to its all - round isolation by a fast - hardening polymer placed in the underwater channels, from the influence of the destructive effect of the washing liquid upon prolonged core extraction on the surface.

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F o rm u l a i z o b r e n i l

1 "A coring device, comprising a housing with rock-breaking tools, a core receiving tube with a gripping head, core breaking elements and a chamber with an insulating core composition,

communicating with a core-receiver tube, peripheral underwater channels, and a propellant, characterized in that, in order to increase reliability, a core-receiver tube is performed. The yen is with radial channels in the lower part, and the core elements are made in the form of plungers spaced in the radial channels of the core tube, which communicate. with underwater channels, with the propellant yctanoBfleH in the case above the core tube and run as a pair

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pistons connected by a pipeline with a saddle under / a relief valve and bypass channels between the pistons, and the case space between the displacer and the core receiver pipe is filled with a liquid in a volume equal to the total volume of the underwater channels.

2. A snapshot of pop. 1, characterized in that the displacer is provided with a slips for connection with a gripping head and a protrusion for interacting with the overshot.

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FIG. 2

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Claims (2)

Claim 1. Column projectile, containing ¹ body with a rock cutting tool, a core receiving pipe with a gripping head, core cutting elements and a chamber with an insulating core composition installed in the body, 7 1752924 communicating with a core receiving pipe, peripheral underwater channels,. and a displacer, characterized in that, in order to increase reliability, the core receiving pipe is made. the yen with radial canals in the lower part, and the yernorva + spruce’s elements are made in the form of plungers placed in core channels with radial channels. pipes connected. with underwater channels, with the displacer installed in the housing above the volume in core-type pairs of pipes and made in f * 2 ¹ / / About b / 4 / I / 2 Μ l £ of pistons connected by a pipeline to the seat under the / relief valve and bypass channels between the pistons, and r 5 the housing space between the displacer and the core receiving pipe is filled. but liquid in a volume equal to the total volume of the underwater channels. <2. The projectile according to π.1, is unique in that the displacer · is equipped with a slip for connecting to the gripping head and a protrusion for interacting with the overshot. 9 L 15 // A·