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Remote control variable-diameter stabilizer controlled by clutch

A clutch control and stabilizer technology, which is applied in the field of downhole tools and remote control variable diameter stabilizers, can solve the problems of difficult processing, complex curved surfaces on the cam, and large force on the cam pin.

Pending Publication Date: 2021-09-07
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The curved surface on the internal control cam of the variable diameter of the stabilizer is complex and difficult to process;
[0004] (2) The cam pin bears a large force and is easily deformed, which leads to poor reliability of the variable diameter control
However, the driving mechanism part still adopts a spring-driven structure, and the controllability is low in actual use.

Method used

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  • Remote control variable-diameter stabilizer controlled by clutch
  • Remote control variable-diameter stabilizer controlled by clutch
  • Remote control variable-diameter stabilizer controlled by clutch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Refer to attached figure 1 , a remote control variable diameter stabilizer controlled by a clutch, comprising a main body 1, a mandrel arranged in the main body 1, a reset spring 3, an inclined block 5, The drive mechanism, and a plurality of centralizing pistons 6 radially distributed on the wall of the body 1; wherein, each centralizing piston 6 forms an axial sliding limit fit with the inclined surface on the corresponding inclined block 5, and the mandrel is formed by the upper core Shaft 2 and lower mandrel 7 are sealed and connected up and down to form a central pipe column. The outer boss on the top of upper mandrel 2 forms an axial sliding seal fit with the inner wall of body 1. The return spring 3 is arranged on the ring below the outer boss of upper mandrel 2. In the cavity, the lower end of the return spring 3 is relatively fixedly connected to the body 1, the slanting block 5 is fixedly connected to the outer wall of the upper mandrel 2 below the return spri...

Embodiment 2

[0051] On the basis of embodiment 1, further include:

[0052] Between the lower end of the lower mandrel 7 and the body 1, a balance piston 20 and a differential pressure piston 22 are sequentially installed from top to bottom, and a radially penetrating pipe wall is provided on the tube wall of the body 1 between the balance piston 20 and the differential pressure piston 22. Annulus hole 21 .

[0053] The body 1 at the lower end of the lower mandrel 7 is provided with a signal body 23 , the outer diameter of the signal body 23 is smaller than the inner diameter of the lower mandrel 7 , and the lower mandrel 7 traps the signal body 23 when the lower mandrel 7 goes down for a long stroke.

[0054] An upper thrust bearing 8 is installed between the top of the driving cam 9 and the lower mandrel 7, an intermediate thrust bearing 14 is installed between the bottom of the driving cam 9 and the upper fitting body 17, and between the upper fitting body 17 and the lock nut 16 Lower ...

Embodiment 3

[0062] Refer to attached figure 1 , the clutch-controlled remote variable diameter stabilizer includes a body 1, the lower end of the body 1 is connected to the lower joint 24, and the upper end of the body 1 and the lower end of the lower joint 24 are respectively connected to the drill string above and below. The body 1 is built with an upper mandrel 2 and a lower mandrel 7, and the upper mandrel 2 and the lower mandrel 7 are fixedly connected from top to bottom, and the inner cavity of the upper mandrel 2 and the lower mandrel 7 is a drilling fluid channel. A signal body 23 is disposed between the lower end of the lower mandrel 7 and the lower joint 24 . A return spring 3 is arranged on the upper mandrel 2, the upper end of the return spring 3 is limited by the convex step at the top of the upper mandrel 2, and the lower end of the return spring 3 is a spring seat 4, which forms a limit fit with the body 1. Inside the body 1 below the spring seat 4, a slanting block 5 is p...

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Abstract

The invention discloses a remote control variable-diameter stabilizer controlled by a clutch. The remote control variable-diameter stabilizer comprises a body, a mandrel, a reset spring, an inclined block, a driving mechanism and a plurality of centralizing pistons. The reset spring, the inclined block and the driving mechanism are sequentially arranged in an annular cavity of the mandrel and the body from top to bottom, and the centralizing pistons are arranged on the wall of the body and distributed in the radial direction. Each centralizing piston is in axial sliding limiting fit with the inclined face of the corresponding inclined block, the mandrel is a hollow tubular column formed by vertically connecting an upper mandrel and a lower mandrel in a sealed mode, and the driving mechanism is a stroke mechanism controlled by a one-way clutch and comprises a driving cam, the one-way clutch, a cam pin, an upper embedding body, a lower embedding body and a limiting pin. The remote control variable-diameter stabilizer controlled by the clutch is matched with a switch drilling pump to achieve working state switching of the variable-diameter stabilizer, multiple times of transposition is achieved, the driving cam is not provided with a complex curve surface, the cam pin only drives the upper embedding body to rotate in the circumferential direction, circumferential rotation only overcomes friction torque, stress is small, deformation is small, and an outer diameter state of the variable-diameter stabilizer is monitored through pump pressure of the ground drilling pump.

Description

technical field [0001] The invention belongs to the field of drilling engineering equipment, and relates to a downhole tool for drilling, in particular to a clutch-controlled remote control variable-diameter stabilizer used in drilling operations for directional wells, horizontal wells and extended-reach wells in the petroleum industry. Background technique [0002] In the drilling process of directional wells, horizontal wells and extended-reach wells, in order to ensure that the actual drilling trajectory meets the requirements of the designed wellbore trajectory, one of the methods is to use the remote variable diameter stabilizer controlled by the switch drilling pump, but it is now developed This type of variable diameter stabilizer has the following problems: [0003] (1) The curved surface on the internal control cam of the variable diameter of the stabilizer is complex and difficult to process; [0004] (2) The cam pin bears a large force and is easily deformed, whi...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B17/10
CPCE21B7/04E21B7/046E21B17/1078
Inventor 周志刚周延军赵洪山曲刚王安庆李东升李春光夏文安
Owner SINOPEC SSC
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