CN2767645Y

CN2767645Y - Filling pile positioning tool for horizontal well

Info

Publication number: CN2767645Y
Application number: CN 200420116546
Authority: CN
Inventors: 胡国强; 杨道平; 宁世品
Original assignee: Drilling Technology Research Institute of Xinjiang Petroleum Administration
Current assignee: Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Priority date: 2004-11-22
Filing date: 2004-11-22
Publication date: 2006-03-29
Anticipated expiration: 2014-11-22

Abstract

The utility model relates to a drilling completion well operation tool of an oil-gas field, particularly a filling pile positioning tool for a horizontal well. The filling pile positioning tool for a horizontal well is mainly composed of a body, a valve seat push rod, a pin shaft, a clamping block, a baffle ring, a self locking ring, a guide shoe head, etc., wherein a plurality of grooves which are symmetrically distributed along the center are arranged on the body. The clamping block is arranged in a groove in the body by the pin shaft and the baffle ring is fixed on the body by screws, wherein the baffle ring is used for the axial spacing of the self-locking ring. The valve seat push rod and the guide shoe head are connected and fixed together through threads, and a single-flow assembly is arranged in the valve seat push rod. In the process of downwards loading a pipe column, the single-flow assembly in a clamping block assembly is used to achieve the problem of automatic grouting in the process of downwards loading the pipe column. When a filling pipe column is downwards loaded to a preset position, a pump is opened and pressure is restrained on the ground, and thus the clamping block is spread out. After the pipe column is lifted to a position above a positioning joint, the pipe column is downwards loaded once more, and the variation of hanging load is used for judging whether positioning is successful. In addition, the utility model can also be used as a positioning mechanism of other underground construction.

Description

A kind of horizontal well filling tubing string orientation tool

Technical field

The utility model relates to the instrument that uses in the oilfield drilling completion practice, especially a kind of horizontal well filling tubing string orientation tool.

Background technology

In the horizontal well completion operation of sectional control, when carrying out the packing job step by step of external packer of pipe, at first to realize the location, down-hole of whole filling tubing string, and can guarantee that tubing string can carry out circulation well cleanup behind the location, and can guarantee the automatic grouting of tubing string in transferring process.

Summary of the invention

The purpose of this utility model is to provide a kind of horizontal well filling tubing string orientation tool.

The utility model mainly is made up of body 1, valve seat push rod 2, bearing pin 9, fixture block 10, baffle ring 14, self-locking ring 16, guide shoe head 18 etc., several grooves that are symmetrically distributed along the center on the body 1, bearing pin 9 is installed in fixture block 10 in the groove in the body 1, screw 13 is fixed on baffle ring 14 on the body 1, the axial limiting that is used for self-locking ring 16, valve seat push rod 2 and guide shoe head 18 are fixed together by thread connection, the single current assembly is positioned at valve seat push rod 2, and nearly single current assembly lower end correspondence position all has radial direction through hole as fluid course on valve seat push rod 2 and the body 1.The end that leaf spring 11, leaf spring 11 are housed between fixture block 10 and the body 1 is fixed on the body 2 with lower end, the other end that screw 12 is fixed on fixture block 10; Also design has baffle ring 15, screw 17 to be fixed on the guide shoe head 18 on guide shoe head 18, and baffle ring 15 covers parts such as the bottom of fixture block 10 and baffle ring 14, and can endwisely slip; The single current assembly is made up of valve seat push rod 2, O RunddichtringO 3, Pressure Block 4, shear pin 5, compression spring 6, valve rod 7, sealing ring 8, valve seat push rod 2 usefulness shear pins 5 are fixed and are gone up in place, valve seat push rod 2 adopts with Pressure Block 4 fixedlys connected, and on valve seat push rod 2, have liquid flow hole, at Pressure Block 4 and valve rod 7 the compression spring is housed.

The utility model structure is comparatively simple, be easy to terrestrial operation judges, transfer in the process at tubing string, utilize the single current assembly to realize that tubing string transfers the automatic grouting in the process, when the filling tubing string arrives the precalculated position down, ground turn on pump, the pressure of spraining are opened fixture block, and the upper lifting pipe post is behind the above position of landing nipple, transfer tubing string once more, utilize the variable quantity of displacement and suspending weight to judge whether to locate successfully.In addition, this mechanism also can be used as the detent mechanism of other down-hole constructions.

Description of drawings

Fig. 1 is the utility model schematic diagram

Fig. 2 is the A-A sectional view of Fig. 1

Fig. 3 is the B-B sectional view of Fig. 1

Specific embodiments

Below in conjunction with accompanying drawing 1 and accompanying drawing 2, the utility model is described in more detail for accompanying drawing 3.

Before the well cementation tubing string was gone into well, the landing nipple that will match with this instrument was installed in the position suitable apart from external packer of pipe, and the landing nipple inner chamber has an annular table terrace, can be stuck on the ring-shaped step after opening with fixture block 10.The utility model is installed in the filling tubing string bottom, transfers in the process at tubing string, and liquid stream enters tubing string inside by the liquid flow hole that leaves on body 1 and valve seat push rod 2, promotes valve rod 7, and the compression spring makes valve rod 7 push rod 2 of lifting off a seat, and realizes automatic grouting.When tubing string arrives the precalculated position down, ground turn on pump, the pressure of spraining, the fluid course of valve rod 7 and valve seat push rod 2 will be closed this moment, under the effect of hydraulic coupling, cut off shear pin 5, promote single current assembly, baffle ring 15 and guide shoe head 18 and move down.Fixture block 10 ejects, and the circulation port of body 1 exposes, and sets up circulation, and pawl mechanism on the valve seat push rod 2 and self-locking ring 16 lockings prevent 2 travelling backwards of valve seat push rod at this moment.

Claims

1, a kind of horizontal well filling tubing string orientation tool, mainly by body (1), valve seat push rod (2), bearing pin (9), fixture block (10), baffle ring (14), self-locking ring (16), guide shoe head compositions such as (18), body (1) is gone up several grooves that is symmetrically distributed along the center, bearing pin (9) is installed in fixture block (10) in the interior groove of body (1), screw (13) is fixed on baffle ring (14) on the body (1), the axial limiting that is used for self-locking ring (16), valve seat push rod (2) and guide shoe head (18) are fixed together by thread connection, the single current assembly is positioned at valve seat push rod (2), valve seat push rod (2) and body (1) are gone up nearly single current assembly lower end correspondence position and are all had radial direction through hole as fluid course, it is characterized in that:

A., the end that leaf spring (11), leaf spring (11) are housed between fixture block (10) and the body (1) is fixed on the body (2) with lower end, the other end that screw (12) is fixed on fixture block (10);

B. also designing on guide shoe head (18) has baffle ring (15), screw (17) to be fixed on the guide shoe head (18), and baffle ring (15) covers the bottom and the baffle ring parts such as (14) of fixture block (10), and can endwisely slip;

C. the single current assembly is made up of valve seat push rod (2), O RunddichtringO (3), Pressure Block (4), shear pin (5), compression spring (6), valve rod (7), sealing ring (8), valve seat push rod (2) is gone up in place with shear pin (5) is fixing, valve seat push rod (2) adopts with Pressure Block (4) fixedlys connected, and on valve seat push rod (2), have liquid flow hole, at Pressure Block (4) and valve rod (7) the compression spring is housed.