RU2630933C1 - Method and device for lifting and lowering core receiving tubes - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: method for extracting and lowering core receiving tubes includes lifting with a winch device for lowering and extracting the core receiving tubes onto the rotor table, mounting the upper part of the core receiving tube cap and lifting it to extract completely the upper section of core receiving assembly, separating the upper and lower sections of the core receiving tube by a device for cutting and holding the core, securing its lower part on the device for extracting and lowering the core receiving tubes by a lower mechanical grip, lowering the device with core receiving tube and the core attached thereto to the receiving bridges and detaching the device for cutting and holding the core and the cap of the core receiving tube. Prior complete extraction of the core receiving tube from the core receiving assembly, the cap is placed in the upper mechanical grip and a turnable plate is closed with a locking pin of the upper mechanical grip. Separation of the upper and lower sections of the core receiving tube is performed by the device for cutting and holding the core after fixing its lower part on the device for extracting and lowering the core receiving tubes by the lower mechanical grip.

EFFECT: simplified extraction of the core receiving pipe with the core from the core receiving assembly and lowering to receiving bridges without bending the core tube and destructing the core, increased safety.

2 cl, 5 dwg

Description

The proposed group of inventions relates to the oil industry, namely to an auxiliary tool for drilling wells with coring.

A known method of extracting core pipes with core from a core sample, in which a grip is installed on the upper part of the upper section of the core receiver, containing an eye with an opening for connection to a lifting mechanism, the hook of the auxiliary winch is connected to the hole of the capture eye, the core receiver is lifted until the upper section is completely removed from the core collection shell, divide the upper and lower sections of the core receiver with a device for cutting and holding the core, lower the upper section of the core receiver and foster bridges (RF patent №2570690, E 21 B 25/00, publ. 10.12.2015, №34 BI).

The disadvantage of this method is the deflection of the core receiver pipe that occurs during the descent and, as a result, the destruction of the core inside. These negative consequences significantly complicate further comprehensive core research. In order to avoid deflection of the core receiver pipe, it is supported in the middle part. But this does not completely solve the problem of deflection of the pipe and is an unsafe technique for working personnel.

Closest to the claimed method in the group of inventions, the technical essence is the method implemented in the device for extracting and lowering the core receiving pipes, in which using the first auxiliary winch from the receiving bridges they lift the device, install it on the floor of the derrick, install on the top of the core receiving pipe cap with a hole for the hook of the auxiliary winch and a clamp with two protrusions for the grooves of the frame plates, with the help of the second auxiliary winch, raise the core collection pipe to the full To extract the upper section from the coring shell, the upper and lower sections of the core pipes are separated by a device for cutting and holding the core, the upper section of the core pipe is inserted into the device until the protrusions of the core pipe pipe clamp are connected to the grooves on the frame plates, the bottom of the core pipe is fixed to the device, and the lower a device with a fixed core receiver pipe to the receiving bridges (Core Lay Down Cradle, http://www.corpro-group,com/service-offering/core-processing/core-lay-down-cradle/).

The disadvantage is that it is necessary to equip the rig with two auxiliary winches, the complexity and insecurity during the work, the increase in the time of extraction of core pipes from the core projectile.

A device is known for extracting core-receiving pipes with a core from a coring shell, containing a section of the coring shell in the form of a pipe, an upper cap for connecting to the upper part of the coring pipe and securing the hook of the auxiliary winch, a lower cap connected to the section of the casing by means of a thread (Zakupki.bashneft. com / resources / files / 0256 / Prilozhenie_11_Tehnicheskie_trebovaniya_k_otboru_kerna0001.xlsx.).

The disadvantages of this device are the large weight of the device, fixing the core receiver pipe only in the upper part, and not along the entire length, therefore, the core is not protected from destruction, the need to disconnect the shell section of the shell from the rest of the core sample, as a result, the resource of threaded joints of the core sample is reduced , insecurity during the work, the inconvenience of removing core pipes with core from the device on the receiving bridges and subsequent sawing into segments of a given length.

The closest device of the same purpose in the group of inventions is a device containing a frame with four supports, rollers mounted in the frame, a lower platform with two wheels rotating each on its own axis, two plates with grooves for the protrusions of the core receiver pipe clamp, the lower end is fastened The core receiver pipe is produced with a lashing strap (Core Lay Down Cradle, http://www.corpro-group.com/service-offering/core-processing/core-lay-down-cradle/).

The disadvantage is that the method of lowering the core receiving pipe using this device is time-consuming and unsafe, requires at least two workers. Another drawback is the mandatory technical equipment of the rig with two auxiliary winches.

EFFECT: simplification of the process of extracting a core-receiving pipe with a core from a core pickup and lowering to receiving bridges, preventing bending of the core-receiving pipe and core destruction, as well as improving safety during operation of the device.

This single technical result in the implementation of the group of inventions on the object-method is achieved by the fact that the method of extracting and lowering the core-receiving pipes includes winding the device for lowering and removing core-receiving pipes on the rotor table, installing the cap on the upper part of the core-receiving pipe and raising it to full extracting the upper section from the core sample, separation of the upper and lower sections of the core pipe by a device for cutting and holding the core, fixing its lower part to the devices for lowering and retrieving core-receiving pipes with a lower mechanical gripper, lowering the device with a fixed core-receiving pipe with a core to the receiving bridges and disconnecting the cutting and holding device for the core and the core-receiving cap, according to the invention, prior to completely removing the upper section of the core-receiving pipe from the core pickup, the upper cap is planted mechanical grip and close the turntable with a locking finger of the upper mechanical grip, while the separation of the upper and lower sections a core-receiving pipe by a device for cutting and holding a core is made after fixing its lower part to a device for lowering and removing core-receiving pipes by a lower mechanical gripper.

This single technical result in the implementation of the group of inventions on the object device is achieved by the fact that the device for extracting and lowering the core receiving pipes contains a frame with supports, at least six supporting rollers, according to the invention, an upper mechanical catch is pivotally mounted in the upper part of the frame for mounting the upper the end of the core-receiving pipe, the lower part of the frame contains a lower mechanical gripper for securing the lower end of the core-receiving pipe and a guide rigidly fixed to the rear side frames, with wheels mounted on it with the possibility of rotation and a removable safety limiter, the upper mechanical gripper case is made with an internal bore under the hood and contains rigidly fixed strips with holes for hanging the frame, a rotating swivel plate with a locking finger, while the surface of the supporting rollers, contacting with the core-receiving pipe, made in the form of two truncated cones and a cylinder for centering and maintaining core-receiving pipes of different sizes, while on the supports on the lower side there are plates with curved edges to facilitate the movement of the device along the gutter and receiving bridges.

The claimed group of inventions meets the requirement of unity of invention, because a group of diverse inventions forms a single inventive concept, moreover, one of the claimed objects of the group, a device for extracting and lowering core pipes, is designed to implement another declared object of the group - a method for extracting and lowering core pipes, while both objects are aimed at solving the same problem with obtaining a single technical result.

In FIG. 1 shows a General view of the inventive device; in FIG. 2 - upper mechanical grip; in FIG. 3 - the position of the device at which the cap is mounted on the core-receiving pipe, the device is lifted from the receiving bridges to the rotor table, the upper end of the core-receiving pipe is fixed by mechanical gripping of the device; in FIG. 4 - the position of the device at which the device is lifted together with the core receiver pipe above the rotor, the lower end of the core receiver pipe is fixed to the device, the sections of core receiver pipes are divided by a core cutting and holding device, the safety limiter is installed on the guide; in FIG. 5 - the position of the device at which the device is rotated 180 degrees, lowering the device with the core receiver pipe to the receiving bridges.

A device for extracting and lowering core-receiving pipes contains a frame 1 made of two channels rigidly fixed to each other or a wide-shelf I-beam, four supports 2 made of pipe sections of a rectangular profile or two channels rigidly connected to each other. The supports 2 are fixed by means of a welded joint to the frame 1, the upper mechanical gripper 3 for securing the upper end of the core-receiving pipe, made with the possibility of rotation on the axis 4 installed in the upper part of the frame 1, the swivel 5, mounted on the axis 6 in the upper part of the frame 1, for hooking the auxiliary winch (not shown) and preventing twisting of the auxiliary winch cable. Along the entire length of the frame 1, six supporting rollers 7 made of a polymer composite material are installed by axes along the entire length of the axle to uniformly support the core-receiving pipe when descending to the receiving bridges and easily moving the core-receiving pipe to the cutting saw for cutting into segments of a given length. The surface of the supporting rollers 7 in contact with the core-receiving pipe is made in the form of two truncated cones and a cylinder for centering and supporting core-receiving pipes of different sizes. To the supports 2 from the bottom side by means of a welded joint, plates 8 of sheet metal with curved edges are installed to facilitate the movement of the device along the gutter and receiving bridges. The lower part of the frame 1 contains a lower mechanical gripper 9 for securing the lower end of the core receiver pipe and a guide 10. The guide 10 is made of a channel and is rigidly fixed to the rear side of the frame 1, two wheels 11 are mounted for rotation on the end of the guide 10 to facilitate movement of the device along the gutter and receiving bridges. The design of the frame 1 allows you to perform operations on the separation of the core at the junction of the sections of the core receiving device by cutting and holding the core. The upper mechanical gripper 3 comprises a housing 12 with an internal bore 13 under the cap 14 of the core receiving pipe, two rigidly fixed strips 15 with holes 16 for hanging on the axis 4 of the frame 1, a rotary bar 18 rotating on the axis 17, and a locking pin 19 installed in the rotary bar 18 through threading. A hole (not shown) is made in the housing 12 for the locking finger 19. The locking finger 19 fixes the pivot plate 18 in the closed position. The upper 3 and lower 9 mechanical grips reliably press the core collection pipe to the supporting rollers 7. To fix the upper end of the core collection pipe in the upper mechanical capture 3, a cap 14 of the core collection pipe with a bore under the upper mechanical capture 3 is installed on the core collection pipe 3 by thread.

The proposed method for extracting and lowering core receiving pipes is as follows.

When disassembling the coring shell 20, as shown in FIG. 3, a cap 14 was installed on the upper part of the core-receiving pipe 21. A device for extracting and lowering the core-receiving pipes was lifted from the receiving bridges 22 onto the rotor table using an auxiliary winch (not shown). After that, it was deployed by the supporting rollers 7 and the upper mechanical gripper 3 towards the rotor and core sample 20. During the descent of the device down the chute 23, as shown in FIG. 3, the cap 14 of the core-receiving pipe was brought into the upper mechanical gripper 3, the pivot plate 18 was closed and fixed with a locking finger 19. After that, the device was lifted up until the section of the core-receiving pipe completely left the shell body, as shown in FIG. 4. The lower part of the core receiver pipe was fixed with a lower mechanical gripper 9 and the core was separated at the junction of the core receiver section using a core cutting and holding device 24, which remains attached to the lower end of the core receiver pipe to prevent core from falling out of the core receiver pipe. A safety stop 25 was installed on the guide 10, the device was deployed with a core-receiving pipe towards the receiving bridges and the device was lowered onto the receiving bridges 22, as shown in FIG. 5. The device for cutting and holding the core 22, the safety limiter 25 and the cap 14 of the core receiving pipe were disconnected. Supporting rollers 7 make it easy to move the core collection pipe towards the cutting saw when cutting core collection pipes into segments of a given length.

The invention ensures the safety of the core inside the core receiving pipes when disassembling the core sample and lowering the core receiving pipes with the core to the receiving bridges, as well as improving safety during operation. The manufacture of the device does not require complex and special technological equipment.

Claims (2)

1. A method for extracting and lowering core-receiving pipes, including lifting with a winch a device for lowering and removing core-receiving pipes on the rotor table, installing a cap on the upper part of the core-receiving pipe and raising it to completely remove the upper section from the core pick-up, separating the upper and lower sections of the core-receiving pipes with a device for cutting and holding the core, fixing its lower part to the device for extracting and lowering the core pipes with a lower mechanical gripper, lowering the device with the fixed ke with a receiving pipe with a core to the receiving bridges and disconnecting the cutting and holding device for the core and the hood of the core receiving pipe, characterized in that prior to the complete removal of the upper section of the core receiving pipe from the core sampling shell, the cap is inserted into the upper mechanical gripper and the pivot plate is closed with a locking finger of the upper mechanical gripper, while the separation of the upper and lower sections of the core pipe by the device for cutting and holding the core is performed after fixing its lower h STI on the device to extract and lowering the core tube of the lower mechanical grip. 2. A device for extracting and lowering core-receiving pipes, containing a frame with supports, at least six supporting rollers, characterized in that the upper part of the frame is pivotally mounted upper mechanical gripper for attaching the upper end of the core-receiving pipe, the lower part of the frame contains a lower mechanical gripper for fixing the lower end of the core-receiving pipe and a guide rigidly fixed to the rear side of the frame, with wheels mounted on it with the possibility of rotation and a removable safety limiter, housing The mechanical gripper is made with an internal bore under the cap and contains rigidly fixed strips with holes for hanging the frame, a rotating swivel plate with a locking finger, while the surface of the supporting rollers in contact with the core receiving pipe is made in the form of two truncated cones and a cylinder for centering and maintaining core-receiving pipes of different sizes, with plates with bent edges mounted on supports on the underside to facilitate movement of the device along the gutter and receiving nym bridges.

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