CN102536133A

CN102536133A - Hydraulic casing pipe centering device

Info

Publication number: CN102536133A
Application number: CN201210035980XA
Authority: CN
Inventors: 李之桐; 王行国; 李仁朴; 王宽; 熊敏敏
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: 2012-07-04
Anticipated expiration: 2032-02-09
Also published as: CN102536133B

Abstract

Disclosed is a hydraulic casing pipe centering device. A piston is sleeved outside a main body and connected onto the main body via a constant-pressure pin, an upper sealing ring and a lower sealing ring are disposed between the main body and the piston, a reducing circular bead is disposed on the main body between the upper sealing ring and the lower sealing ring, another reducing circular bead is arranged on the piston between the upper sealing ring and the lower sealing ring, the reducing circular bead and the piston can be fittingly sealed with the main body, lock catch threads are arranged on the main body, a lock ring is mounted on the inner wall of the piston and can be fastened with the lock catch threads on the main body, an expanding centering barrel is sleeved outside the piston, a plurality of grooves are milled on the expanding centering barrel, a cone is fixed on the inner wall of the expanding centering barrel, an inner conical hole is arranged on the upper portion of the cone, the lower portion of the piston is located in the inner conical hole of the cone, a retaining sleeve is connected to the lower portion of the main body, the expanding centering barrel is seated on the retaining sleeve, when hydraulic pressure is added in a casing pipe, hydraulic force can push the piston to move downwards, the expanding centering barrel can expand to contact with the inner wall of a shaft under effects of a conical surface, so that the casing pipe connected onto the expanding centering barrel is not located at the center in the shaft, and well cementation quality can be guaranteed.

Description

The hydraulic pressure casing stabbing board

Technical field

The present invention relates to the device that a kind of oil drilling completion is used, 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 this invention is to provide a kind of hydraulic pressure casing stabbing board, prevent that sleeve pipe is not placed in the middle in pit shaft, guarantee cementing quality, make ability ordinary production after the well operation of being bored.

The objective of the invention is to realize like this: 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 that 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 invention has the beneficial effects as follows: 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 present invention has remarkable economic efficiency.

Description of drawings

Fig. 1 is an embodiment of the invention structure half sectional view.

The specific embodiment

The following Fig. 1 that combines earlier is described further embodiments of the invention.

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.Be that embodiments of the invention comprise main body 1, level pressure pin 2, lock ring 3, piston 4, go up sealing ring 5, lower seal 7, cone 8, expand and set upright tube 10, interstage sleeve 11, linked hole 6 is arranged on the main body 1, 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 present invention beats 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 present invention 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).