CN115749729A

CN115749729A - Releasable logging bridle

Info

Publication number: CN115749729A
Application number: CN202211395551.3A
Authority: CN
Inventors: 滕启鹏; 董哲; 汪力
Original assignee: ANSHAN SHENKUO MACHINERY MANUFACTURING CO LTD
Current assignee: ANSHAN SHENKUO MACHINERY MANUFACTURING CO LTD
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-03-07

Abstract

The invention relates to a releasable logging bridle, which comprises a shell, wherein one end in the shell is provided with a sealed short-circuit joint, the other end in the shell is provided with a torpedo, the torpedo and the shell are sealed through a movable sleeve, the inner side of the torpedo is connected with a tension rod, the tension rod is connected with a release mechanism, the release mechanism comprises a motor, an output shaft of the motor is sequentially connected with a torque limiter, a backstop and a lead screw, the lead screw is provided with a nut, a limit sleeve is sleeved outside the nut, the end part of the lead screw is rotatably connected with the limit sleeve through a bearing, the limit sleeve is sleeved on the end of the tension rod, a locking sleeve is arranged outside the limit sleeve, the nut is fixedly connected with the locking sleeve through a key sheet, a fixed sleeve is arranged outside the locking sleeve, when the motor is started, the lead screw rotates, the locking sleeve moves towards the side of the motor, the limit of the locking sleeve on the limit sleeve is released, and the positioning limit of the limit sleeve on the tension rod is released. The invention can release the torpedo and avoid the risk of breaking or damaging the expensive cable connected with the torpedo.

Description

Releasable logging bridle

Technical Field

The invention relates to the technical field of well logging, in particular to a device for connecting a petroleum well logging instrument and a well logging cable.

Background

The logging bridle is a cable connector for connecting a logging winch cable and a logging instrument, the bridles used in all large oil fields at present are all purely mechanical bridles, namely conventional bridles with tension rods, the limitation of rated breaking force of the tension rods cannot meet the use of complex underground environment when the instrument is stuck, if the underground instrument is stuck once, a great force is applied to the cable to break the tension rods, certain damage can be caused to the cable, the service life of the cable is influenced, potential safety hazards and economic loss are brought, accidents of cable breaking can be caused, and if the cable is broken, great troubles are caused to subsequent fishing operation.

Disclosure of Invention

The invention aims to solve the technical problem of providing a releasable logging bridle which can release a torpedo and avoid the breakage or damage of a cable connected with the torpedo.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a can release well logging bridle, which comprises an outer shell, one end in the shell is equipped with sealed short circuit joint, the other end in the shell is equipped with the torpedo, it is sealed through the loop between torpedo and the shell, the inboard pull rod of connecting of torpedo, the pull rod is connected with release mechanism, release mechanism includes the motor, the output shaft of motor connects gradually the moment of torsion limiter, the backstop, the lead screw, be equipped with the nut on the lead screw, the stop collar is established to nut outside cover, the tip of lead screw passes through the bearing and is connected with the stop collar rotation, the stop collar is used for the end of centre gripping pull rod, the stop collar outside is equipped with the lock sleeve, the nut passes through key piece fixed connection with the lock sleeve, the lock sleeve outside is equipped with fixed cover, when the motor starts, make the lead screw rotatory, the lock sleeve moves to the motor side, remove the restriction of lock sleeve to the stop collar, remove the location restriction of stop collar to the pull rod.

The shell comprises a first shell and a second shell, a sealing shell is connected between the first shell and the second shell, the front end and the rear end of the sealing shell are respectively sleeved with the first shell and the second shell, the front end of the sealing shell is connected with a positioning sleeve in a propping mode, and the positioning sleeve is connected with the first shell through a screw.

The limiting sleeve comprises a flange and a clamping barrel, the flange is fixedly connected with the clamping barrel, the flange is fixedly connected with a sealing shell of the shell, the clamping barrel comprises a clamping portion, a necking portion and a supporting portion, a plurality of narrow slits are uniformly distributed on the circumferences of the clamping portion and the necking portion, open holes are formed in end points of the narrow slits, and key grooves used for sliding key pieces are formed in a barrel body of the supporting portion.

The non-return device comprises a non-return device shell, a non-return device connecting shaft I, a non-return device connecting shaft II, a friction block and a spring, wherein the non-return device connecting shaft I and the non-return device connecting shaft II are buckled with each other, the friction block is arranged between the non-return device connecting shaft I and the non-return device connecting shaft II, grooves are respectively formed in the non-return device connecting shaft II and the friction block, the spring is placed in the grooves, and the non-return device connecting shaft I and the non-return device connecting shaft II after combination are connected with the non-return device shell through a bearing.

The outer end of the torpedo is provided with a protective cap, and the protective cap is clamped with one end of the first shell of the shell.

The motor is electrically connected with the ground control room in a communication way.

And silicone grease is filled in a sealing cavity formed by the shell and the loop.

Compared with the prior art, the invention has the beneficial effects that:

the invention has the function of automatically releasing the torpedo, avoids the risk of breaking or damaging an expensive cable connected with the torpedo, and also avoids the influence on fishing operation after the cable is broken. The device has double insurance, and the release mechanism makes the torpedo break away from smoothly. In addition, the tension bar is still used, and the torpedo can still be separated by breaking the tension bar under the condition that the release mechanism fails.

The shell sealed by the loop is filled with silicone grease, after the well is placed, the underground water enters the shell, the pressure of the silicone grease and the underground water is balanced, and internal elements are protected to be intact and usable.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a schematic structural view of the stop collar.

Fig. 4 is a structural plan view of the stop collar.

Fig. 5 is a schematic view of the structure of the backstop.

Fig. 6 is a sectional view of the ratchet.

FIG. 7 is a schematic view of the first ratchet connecting shaft and the second ratchet connecting shaft.

In the figure: the device comprises a shell 1, a sealing short-circuit joint 2, a torpedo 3, a loop 4, a tension rod 5, a motor 6, a torque limiter 7, a backstop 8, a lead screw 9, a nut 10, a limiting sleeve 11, a key sheet 12, a locking sleeve 13, a fixing sleeve 14, a first shell 15, a second shell 16, a sealing shell 17, a positioning sleeve 18, a protective cap 19, a flange 20, a clamping cylinder 21, a narrow gap 22, a key groove 23, a backstop shell 24, a backstop connecting shaft I25, a backstop connecting shaft II 26, a friction block 27, a spring 28 and a groove 29.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a releasable logging bridle comprises a housing 1, wherein a sealed short-circuit joint 2 is arranged at one end in the housing 1, the housing 1 comprises a first housing 15 and a second housing 16, a sealed housing 17 is connected between the first housing 15 and the second housing 16, the front end and the rear end of the sealed housing 17 are respectively sleeved with the first housing 15 and the second housing 16, the front end of the sealed housing 1 is abutted with a positioning sleeve 18, and the positioning sleeve is connected with the first housing 15 through a screw.

The other end in the shell 1 is provided with a torpedo 3, and the outer side of the torpedo 3 is provided with a protective cap 19. The protective cap 19 is clamped with one end of the first shell 15.

The torpedo 3 is sealed with the shell through a loop 4, the inner side of the torpedo 3 is connected with a tension rod 5, and the tension rod 5 is connected with a release mechanism.

The releasing mechanism comprises a motor 6, an output shaft of the motor 6 is sequentially connected with a torque limiter 7, a backstop 8 and a lead screw 9, a nut 10 is arranged on the lead screw 9, a limiting sleeve 11 is sleeved outside the nut 10, the end part of the lead screw 9 is rotatably connected with the limiting sleeve 11 through a bearing, a locking sleeve 13 is arranged outside the limiting sleeve 11, and the nut 10 and the locking sleeve 13 are fixedly connected through a key sheet 12.

The stop collar 11 includes flange 20, a clamp 21, flange 20 and a clamp 21 fixed connection, flange 20 and sealed shell 17 fixed connection, a clamp 21 includes clamping part A, throat B and supporting part C, be equipped with in the clamping part A with 5 head assorted chambeies of tension bar, a plurality of slots 22 of equipartition on the circumference of clamping part A and throat B, the extreme point department of slot 22 is equipped with the trompil, be equipped with on supporting part C's the barrel and be used for the gliding keyway 23 of bonding pad 12. The locking sleeve 13 is connected with the periphery of the end part of the limiting sleeve 11 in a sliding mode. The locking sleeve 13 is externally provided with a fixed sleeve 14. The locking sleeve 13 is able to slide inside the housing of the fixing sleeve 14. The motor 6 is electrically connected with the ground control room in a communication way.

The backstop 8 comprises a backstop shell 24, a backstop connecting shaft I25, a backstop connecting shaft II 26, a friction block 27 and a spring 28, the end parts of the backstop connecting shaft I25 and the backstop connecting shaft II 26 are buckled with each other, the friction block 27 is arranged between the backstop connecting shaft I25 and the backstop connecting shaft II 26, grooves 29 are respectively formed in the backstop connecting shaft II 26 and the friction block 27, the spring 28 is placed in the grooves 29, and the combined backstop connecting shaft I25 and the backstop connecting shaft II 26 are connected with the backstop shell 24 through bearings.

And silicone grease is filled in a sealed cavity formed by the shell 1 and the loop 4.

The working process of the device is as follows:

the tension bar is initially clamped in the limiting sleeve, when a logging instrument connected with the releasable logging bridle meets a jam, the ground control room starts a motor in the releasable logging bridle, the motor enables a screw rod to rotate, a locking sleeve connected with a nut is driven to move towards the motor side, the limitation of the locking sleeve on the limiting sleeve is removed, a clamping barrel of the limiting sleeve has elasticity, the clamping barrel expands after the limitation is removed, the positioning limitation of the limiting sleeve on the tension bar is removed, and the tension bar is separated from the limiting sleeve under the action of external force so as to achieve the purpose of releasing the tension bar.

The device has double insurance and a releasing mechanism, so that the torpedo can be smoothly separated. In addition, the tension bar is still used, and the torpedo can still be separated by breaking the tension bar under the condition that the release mechanism fails.

The bridle not only continues to adopt the structure of the tension rod, but also adds a release mechanism on the original structure, thereby playing the double insurance of special complex well conditions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a can release well logging bridle, which comprises an outer shell, one end in the shell is equipped with sealed short circuit joint, the other end in the shell is equipped with the torpedo, it is sealed through the loop between torpedo and the shell, the inboard pull rod of connecting of torpedo, the pull rod is connected with release mechanism, release mechanism includes the motor, the output shaft of motor connects gradually the moment of torsion limiter, the backstop, the lead screw, be equipped with the nut on the lead screw, the stop collar is established to nut outside cover, the tip of lead screw passes through the bearing and is connected with the stop collar rotation, the stop collar is used for the end of centre gripping pull rod, the stop collar outside is equipped with the lock sleeve, the nut passes through key piece fixed connection with the lock sleeve, the lock sleeve outside is equipped with fixed cover, when the motor starts, make the lead screw rotatory, the lock sleeve moves to the motor side, remove the restriction of lock sleeve to the stop collar, remove the location restriction of stop collar to the pull rod.

2. The releasable logging headstall as claimed in claim 1, wherein the housing comprises a first housing and a second housing, a sealing shell is connected between the first housing and the second housing, the front end and the rear end of the sealing shell are respectively sleeved with the first housing and the second housing, the front end of the sealing shell is abutted with a positioning sleeve, and the positioning sleeve is connected with the first housing through a screw.

3. The releasable logging bridle according to claim 1, wherein the stop collar comprises a flange and a clamping cylinder, the flange is fixedly connected with the sealing shell of the housing, the clamping cylinder comprises a clamping portion, a necking portion and a supporting portion, a plurality of narrow slits are uniformly distributed on the circumferences of the clamping portion and the necking portion, the end points of the narrow slits are provided with openings, and a key groove for sliding the key sheet is formed in the cylinder body of the supporting portion.

4. The releasable logging headstall according to claim 1, wherein the backstop comprises a backstop housing, a first backstop connecting shaft, a second backstop connecting shaft, a friction block and a spring, the first backstop connecting shaft and the second backstop connecting shaft are fastened with each other, the friction block is arranged between the first backstop connecting shaft and the second backstop connecting shaft, grooves are respectively arranged on the second backstop connecting shaft and the friction block, the spring is placed in the grooves, and the first combined backstop connecting shaft and the second backstop connecting shaft are connected with the backstop housing through bearings.

5. The releasable logging bridle of claim 1, wherein the external end of the torpedo is provided with a protective cap, and the protective cap is clamped with one end of the first shell of the housing.

6. The releasable logging headstall of claim 1 wherein the motor is in communication electrical communication with a surface control room.

7. The releasable logging headstall of claim 1 wherein the sealed cavity formed by the housing and the loop is filled with silicone grease.