CN202441277U

CN202441277U - Hydraulic sleeve centering device

Info

Publication number: CN202441277U
Application number: CN2012200514923U
Authority: CN
Inventors: 李加庆; 王宽; 熊敏敏; 孙喆
Original assignee: Dongying Jianyuan Trade & Industry Co Ltd
Current assignee: Dongying Jianyuan Trade & Industry Co Ltd
Priority date: 2012-02-09
Filing date: 2012-02-09
Publication date: 2012-09-19
Anticipated expiration: 2022-02-09

Abstract

The utility model relates to a hydraulic sleeve centering device. A piston is sleeved outside a main body and is connected with the main body through a constant pressure pin, an upper sealing ring and a lower sealing ring are arranged between the main body and the piston, the main body is provided with a reducing shoulder between the upper sealing ring and the lower sealing ring, the piston is also provided with a reducing shoulder between the upper sealing ring and the lower sealing ring so as to be matched with the main body for sealing, the main body is provided with buckle teeth, the inner wall of the piston is provided with a lock ring, the lock ring can be buckled with the buckle teeth on the main body, an expansion centering cylinder is sleeved outside the piston and is milled with a plurality of open slots, a cone is fixed on the inner wall of the expansion centering cylinder, the upper part of the cone is provided with an inner tapered hole, the lower part of the piston is arranged in the inner tapered hole of the cone, a spacer sleeve is connected with the lower part of the main body, and the expansion centering cylinder is seated on the spacer sleeve. When hydraulic pressure is increased in a sleeve, the piston is pushed by the hydraulic pressure to move downwards, the expansion centering cylinder expands to contact with the inner wall of a shaft under effects of the cone so that the sleeve connected with the expansion centering cylinder is not centered in the shaft, and thus the shaft cementing quality can be ensured.

Description

The hydraulic pressure casing stabbing board

Technical field

The utility model relates to the device that a kind of oil drilling completion is used, and is a kind of hydraulic pressure casing stabbing board.

Background technology

Oil drilling will be lowered to sleeve pipe in pit shaft, in the annular space between pit shaft and the sleeve pipe, inject cement then, in the annular space between pit shaft and the sleeve pipe, injects cement and is called well cementation; Rear sleeve can not be in the middle of the pit shaft in the pit shaft because well depth, sleeve pipe are lowered to, and makes the annular space between its pit shaft and the sleeve pipe inhomogeneous; Make its well cementation back cement sheath skewness; Can not guarantee cementing quality, the production of the well that influence is bored causes heavy economic losses.

Summary of the invention

The purpose of the utility model provides a kind of hydraulic pressure casing stabbing board, prevents that sleeve pipe is not placed in the middle in pit shaft, guarantees cementing quality, makes ability ordinary production after the well operation of being bored.

The purpose of the utility model be achieved in that comprise main body, level pressure pin, lock ring, piston, go up sealing ring, lower seal, cone, expansion set upright tube, interstage sleeve, and linked hole is arranged on the main body, piston bush is contained in outside the main body; Piston is connected on the main body by the level pressure pin, and last sealing ring, lower seal are arranged between main body and the piston, and last sealing ring is on the linked hole; Lower seal is under the linked hole, and main body has the reducing shoulder between last sealing ring and lower seal, and the diameter at last sealing ring place is greater than the diameter at lower seal place; Piston has the reducing shoulder between last sealing ring and lower seal, make itself and piston can with the main body fitted seal, the snap close tooth is arranged on the main body; Lock ring is installed on piston inner wall, and lock ring can interlock with the snap close tooth on the main body, and expansion is set upright jacket casing and is contained in outside the piston; Expansion is set upright and is milled with many flutings on the tube; Cone is fixed on expansion and sets upright on the inwall, and cone top is the female cone hole, and the piston bottom is in the female cone hole of cone; Interstage sleeve is connected the bottom of main body, and expansion is set upright cylinder base on interstage sleeve.

The beneficial effect of the utility model is: when in sleeve pipe, adding hydraulic pressure, hydraulic coupling can promote descent of piston, under the taper seat effect; Expansion is set upright tube and can the expansion change be contacted with shaft in wall greatly, makes connection sleeve pipe above that not placed in the middle in pit shaft, makes the annular space between its pit shaft and the sleeve pipe even; Cement thickness is identical after injecting well cementing of cement, can guarantee cementing quality, the well that is bored is gone into operation after ability ordinary production for a long time; Therefore, the utlity model has remarkable economic efficiency.

Description of drawings

Fig. 1 is the utility model example structure half sectional view.

The specific embodiment

The following Fig. 1 that combines earlier is described further the embodiment of the utility model.

In Fig. 1: the 1st, main body, the 2nd, the level pressure pin, the 3rd, lock ring, the 4th, piston, the 5th, last sealing ring, the 7th, lower seal, the 8th, cone, the 10th, tube is set upright in expansion, and the 11st, interstage sleeve.The embodiment that is the utility model comprises main body 1, level pressure pin 2, lock ring 3, piston 4, goes up sealing ring 5, lower seal 7, cone 8, expands and set upright tube 10, interstage sleeve 11, and linked hole 6 is arranged on the main body 1, and piston 4 is sleeved on outside the main body 1; Piston 4 is connected on the main body 1 by level pressure pin 2, last sealing ring 5, lower seal 7 is arranged, in the present embodiment between main body 1 and the piston 4; Last sealing ring 5 is installed on main body 1 outer wall, and lower seal 7 is installed on piston 4 inwalls, makes the gap between piston 4 and the main body 1 obtain sealing; Last sealing ring 5 is on the linked hole 6, and lower seal 7 is under the linked hole 6, and main body 1 has the reducing shoulder between last sealing ring 5 and lower seal 7; The diameter at last sealing ring 5 places is greater than the diameter at lower seal 7 places, and piston 4 has the reducing shoulder between last sealing ring 5 and lower seal 7, make itself and piston 4 can with main body 1 fitted seal; The snap close tooth is arranged on the main body 1, lock ring 3 is installed on piston 4 inwalls, lock ring 3 can interlock with the snap close tooth on the main body 1; Expansion is set upright tube 10 and is sleeved on outside the piston 4, and expansion is set upright and is milled with many flutings 9 on the tube 10, and cone 8 is fixed on expansion and sets upright on tube 10 inwalls; Cone 8 tops are the female cone hole; Piston 4 bottoms are in the female cone hole of cone 8, and interstage sleeve 11 is connected the bottom (being threaded) of main body 1, the expansion set upright the tube 10 on interstage sleeve 11.Piston 4 bottoms are outer cone, and the outer cone of piston 4 bottoms is in the female cone hole of cone 8.

The utility model is beaten hydraulic pressure when needing well cementation after in pit shaft under the sleeve pipe in sleeve pipe, pressure is from linked hole 6 entering; Make the reducing shoulder pressurized of piston 4 produce thrust down, thereby cut off level pressure pin 2, the piston 4 descending cones 8 that push away; Under the effect in cone 8 female cone holes, piston 4 produces radial component and makes cone 8 radius vector displacements, sets upright on the tube 10 because cone 8 is fixed on expansion; Make expansion set upright the fluting of tube 10 and the outside bulging of rib between the fluting, the big back of outer deformation contacts with shaft in wall, cover is in control sets upright; Well cementation back cement thickness is even, guarantees that well cementation is qualified.

Piston 4 drives lock ring 3 when descending descending together; After the piston 4 descending end, lock ring 3 can interlock with the snap close tooth on the main body 1, and the snap close tooth on the main body 1 is unidirectional tooth; After snap close tooth on lock ring 3 and the main body 1 interlocks; Piston 4 can not rollback, and expansion is set upright the fluting of tube 10 and can not regained with the rib between slotting, and the utility model can work to set upright sleeve pipe all the time.

The quantity of cone 8 equates with rib quantity, cone 8 of welding on each rib.It is one that cone 8 is set upright tube 10 with expansion, also can be processed into composite member.

Claims

1. a hydraulic pressure casing stabbing board comprises main body (1), level pressure pin (2), lock ring (3), piston (4), goes up sealing ring (5), lower seal (7), cone (8), expands and set upright tube (10), an interstage sleeve (11), it is characterized in that: linked hole (6) is arranged on the main body (1); Piston (4) is sleeved on outside the main body (1), and piston (4) is connected on the main body (1) by level pressure pin (2), and last sealing ring (5), lower seal (7) are arranged between main body (1) and the piston (4); Last sealing ring (5) is on the linked hole (6), and lower seal (7) is under the linked hole (6), and main body (1) has the reducing shoulder between last sealing ring (5) and lower seal (7); The diameter that the diameter that last sealing ring (5) is located is located greater than lower seal (7), piston (4) has the reducing shoulder between last sealing ring (5) and lower seal (7), make itself and piston (4) can with main body (1) fitted seal; Main body has the snap close tooth on (1); On piston (4) inwall, lock ring (3) is installed, lock ring (3) can interlock with the snap close tooth on the main body (1), and expansion is set upright tube (10) and is sleeved on outside the piston (4); Expansion is set upright on the tube (10) and is milled with many flutings (9); Cone (8) is fixed on expansion and sets upright on tube (10) inwall, and cone (8) top is the female cone hole, and piston (4) bottom is in the female cone hole of cone (8); Interstage sleeve (11) is connected the bottom of main body (1), and expansion is set upright tube (10) seat on interstage sleeve (11).

2. hydraulic pressure casing stabbing board according to claim 1 is characterized in that: piston (4) bottom is an outer cone, and the outer cone of piston (4) bottom is in the female cone hole of cone (8).