CN213016269U

CN213016269U - Wellhead fluid director

Info

Publication number: CN213016269U
Application number: CN202021683947.4U
Authority: CN
Inventors: 王建生
Original assignee: Beijing Fangyuan Tiandi Oil And Gas Technology Co ltd
Current assignee: Beijing Fangyuan Tiandi Oil And Gas Technology Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-04-20
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses a wellhead fluid director, which comprises a shell and an annular rubber cylinder; the shell is an annular frame body with double-layer side walls; the drill pipe is used for being installed at a wellhead and enabling a drill pipe to penetrate through the central through hole; the inner side wall of the shell is provided with a circumferential annular notch which is communicated with a liquid cavity formed by the double-layer side wall of the shell; the outer side wall of the shell is provided with a water inlet and a water outlet; the annular rubber cylinder is fixed with the annular notch in a sealing way and is communicated with the liquid cavity; the annular rubber cylinder protrudes from the inner side wall of the shell to the mounting axis of the drill rod. The utility model discloses a water injection pump makes annular packing element inflation to the liquid intracavity injection high pressure water of casing, and the annular packing element of inflation holds the drilling rod tightly and seal housing central authorities through-hole forms the confined annular space, when needing to open, the delivery port drainage, annular packing element self shrink opens the annular space, realizes that the drilling tool normally rises, establishes positive and negative circulation, fluid water conservancy diversion to prevent that the shallow layer fluid from spilling over the kick and the blowout phenomenon that cause suddenly, realize that the well drilling normally goes on.

Description

Wellhead fluid director

Technical Field

The utility model relates to a technical field is adopted to the coal bed gas exploitation, and more specifically the well head divertor that says so relates to a sealed water conservancy diversion and prevent shallow layer fluid well kick and blowout to drilling rod and annular space when being used for coal bed gas well drilling.

Background

Coal bed gas exploitation is realized by drilling a vertical well and a horizontal well, in order to realize normal drilling of a coal bed gas well, establish opening and closing of a wellhead annulus to realize normal circulation of drilling fluid and prevent potential safety hazards caused by overflow or blowout of underground shallow fluid, a wellhead blowout preventer (BOP) is usually installed at a wellhead. The wellhead blowout preventer for drilling the conventional oil and gas well has the disadvantages of complex manufacturing process, large and heavy structure and difficult installation and operation. Coal bed gas wells are typically drilled into shallow wells and the formations encountered are typically at relatively low pressures, up to only a few tenths of a mpa, and the use of wellhead blowout preventers for conventional oil and gas drilling is a very uneconomical method. In order to overcome the shortcoming of the well head preventer that conventional oil gas well used is used at present in the coal bed gas well drilling, the utility model provides a manufacturing process is simple, simple structure, installation convenient to use, and the well head divertor of coal bed gas well drilling can be satisfied to the low price, and is just more urgent to the exploitation demand of coal bed gas.

Therefore, how to provide a wellhead deflector which is easy to control the drill rod to be taken and put and prevents the injection is a problem which needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a well head divertor aims at solving above-mentioned technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a wellhead flow diverter, comprising: a shell and an annular rubber cylinder;

the shell is an annular frame body with double layers of side walls; the drill pipe is used for being installed at a wellhead and enabling a drill pipe to penetrate through the central through hole; the inner side wall of the shell is provided with a circumferential annular notch which is communicated with a liquid cavity formed by the double-layer side wall of the shell; the outer side wall of the shell is provided with a water inlet and a water outlet;

the annular rubber cylinder is fixed with the annular notch in a sealing way and is communicated with the liquid cavity; the annular rubber cylinder protrudes from the inner side wall of the shell to the installation axis of the drill rod.

Through the technical scheme, the utility model discloses a water injection pump pours into the water under high pressure into to the liquid intracavity of casing and makes annular packing element inflation, the annular packing element of inflation holds the drilling rod tightly and seals casing central authorities through-hole forms the confined annular space, when needing to open, the delivery port drainage, annular packing element self shrink opens the annular space, just so can realize that the drilling tool normally plays down, establish positive and negative circulation, the fluid water conservancy diversion, and prevent that the shallow fluid from spilling over the kick and the blowout phenomenon that cause suddenly, play the well head and prevent spouting the effect, realize well drilling normal clear.

Preferably, in the above wellhead diverter, the housing includes an upper housing and a lower housing; the upper shell comprises an upper flange plate and an annular upper inner side wall which is vertically protruded downwards from the inner ring of the upper flange plate; the lower shell comprises a lower flange disc, an annular lower inner side wall which is vertically and upwards protruded at an inner ring of the lower flange disc, and an annular outer side wall which is protruded between the inner ring and an outer ring of the lower flange disc; the top end of the annular outer side wall is detachably connected with the upper flange plate, and the annular upper inner side wall and the annular lower inner side wall are correspondingly formed into the annular notch; the water inlet and the water outlet are formed in the annular outer side wall. Through the prefabricated molding and the detachable connection of the upper shell and the lower shell, the shell can be quickly manufactured, and the annular rubber cylinder can be conveniently and quickly replaced.

Preferably, in the wellhead diverter, the lower flange is fastened and connected with the wellhead by bolts. The connection is simple, quick, stable and reliable.

Preferably, in the wellhead flow guider, the top end of the annular outer side wall is fixedly connected with the upper flange plate through a screw thread. The fixation is simple, convenient and reliable.

Preferably, in the wellhead fluid director, the water inlet is provided with a water inlet valve; and the water outlet is provided with a water outlet valve. The control of water inlet and outlet is convenient.

Preferably, in the wellhead fluid director, the annular rubber sleeve comprises a mounting part and an expansion part; the mounting part is fixedly attached to the inner wall of the liquid cavity and avoids the water inlet and the water outlet; the inflation portion is annular structure, and the cross-section is the U type, and with installation department sealing connection forms an organic whole, and follows annular notch to the liquid chamber outside protrusion. The installation of the annular rubber cylinder is easy, and the sealing performance and the connection stability of the annular rubber cylinder can be improved.

Known via foretell technical scheme, compare with prior art, the utility model discloses a well head divertor has following beneficial effect:

1. the annular rubber sleeve is expanded by injecting high-pressure water into the liquid cavity of the shell through the water injection pump, the expanded annular rubber sleeve tightly holds the drill rod and seals the central through hole of the shell to form a closed annular space, when the annular rubber sleeve needs to be opened, a water outlet valve is opened for draining water, the annular rubber sleeve shrinks by itself to open the annular space, so that the drilling tool can be normally started, positive and negative circulation and fluid diversion are established, and the phenomenon of kick and blowout caused by sudden overflow of shallow fluid is prevented, the effect of preventing the wellhead blowout is achieved, and normal drilling is realized.

2. The utility model provides a divertor has played the effect of preventer simultaneously, has simplified the complicated structure of current preventer, and the result of use is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a structural sectional view of the present invention;

fig. 2 is a structural sectional view of the upper housing provided by the present invention;

fig. 3 is a structural sectional view of the lower housing provided by the present invention;

fig. 4 is a structural sectional view of the ring-shaped rubber cylinder provided by the present invention.

Wherein:

1-a shell;

11-an upper shell;

111-an upper flange;

112-annular upper inner side wall;

12-a lower housing;

121-lower flange;

122-annular lower inner side wall;

123-an annular outer side wall;

1231-water inlet;

1232-water outlet;

13-an annular notch;

14-a liquid chamber;

2-a ring-shaped rubber cylinder;

21-a mounting portion;

22-an expansion part;

3-well head;

4-a drill pipe;

5-bolt;

6-a water inlet valve;

7-water outlet valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the embodiment of the present invention discloses a wellhead fluid director, including: a shell 1 and an annular rubber cylinder 2;

the shell 1 is an annular frame body with double-layer side walls; and is intended to be mounted on the wellhead 3 and to have the drill rod 4 pass through its central through hole; the inner side wall of the shell 1 is provided with a circumferential annular notch 13, and the annular notch 13 is communicated with a liquid cavity 14 formed by the double-layer side wall of the shell 1; the outer side wall of the shell 1 is provided with a water inlet 1231 and a water outlet 1232;

the annular rubber cylinder 2 is fixed with the annular notch 13 in a sealing way and is communicated with the liquid cavity 14; the annular rubber cylinder 2 protrudes from the inner side wall of the shell 1 to the installation axis of the drill rod 4.

In order to further optimize the above technical solution, the housing 1 comprises an upper housing 11 and a lower housing 12; the upper shell 11 comprises an upper flange 111 and an annular upper inner side wall 112, wherein the inner ring of the upper flange 111 is downwards vertically convex; the lower shell 12 comprises a lower flange 121, an annular lower inner side wall 122 which is vertically and upwards protruded at the inner ring of the lower flange 121, and an annular outer side wall 123 which is protruded between the inner ring and the outer ring of the lower flange 121; the top end of the annular outer side wall 123 is detachably connected and fixed with the upper flange 111, and the annular upper inner side wall 112 and the annular lower inner side wall 122 correspondingly form an annular notch 13; the water inlet 1231 and the water outlet 1232 are opened on the annular outer side wall 123.

In order to further optimize the technical scheme, the lower flange 121 is tightly connected with the wellhead 3 through bolts 5.

In order to further optimize the technical scheme, the top end of the annular outer side wall 123 is fixedly connected with the upper flange 111 through screw threads.

In order to further optimize the technical scheme, a water inlet valve 6 is arranged at the water inlet 1231; the water outlet 1232 is provided with a water outlet valve 7.

In order to further optimize the technical scheme, the annular rubber cylinder 2 comprises an installation part 21 and an expansion part 22; the mounting part 21 is attached and fixed on the inner wall of the liquid cavity 14 and avoids the water inlet 1231 and the water outlet 1232; the expansion part 22 has an annular structure and a U-shaped cross section, is integrally connected to the mounting part 21 in a sealing manner, and protrudes from the annular notch 13 to the outside of the liquid chamber 14.

The utility model discloses a use method does:

it is fixed with well head 3 that will descend flange 121 to pass through bolt 5, at this moment, do not pour into liquid into in the liquid chamber 14 of casing 1, transfer drilling rod 4, transfer and accomplish the back, it makes annular packing element 2 inflation to pour into high pressure water into the liquid chamber 14 of casing 1 through the water injection pump, the annular space that the annular packing element 2 of inflation hugs closely drilling rod 4 and sealed casing 1 central through hole formation, when needing to open, open outlet valve 7 drainage, annular packing element 2 self shrink opens the annular space, just so can realize drilling rod 4 and normally play down, establish positive and negative circulation, fluid water conservancy diversion, and prevent that shallow layer fluid from spilling over the kick and the blowout phenomenon that cause suddenly, play the well head and prevent spouting the effect, realize the well drilling and normally go on.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wellhead deflector, comprising: a shell (1) and an annular rubber cylinder (2);

the shell (1) is an annular frame body with double-layer side walls; and is used for being installed at the well head (3) and enabling the drill rod (4) to pass through the central through hole; the inner side wall of the shell (1) is provided with a circumferential annular notch (13), and the annular notch (13) is communicated with a liquid cavity (14) formed by the double-layer side wall of the shell (1); the outer side wall of the shell (1) is provided with a water inlet (1231) and a water outlet (1232);

the annular rubber cylinder (2) is fixed with the annular notch (13) in a sealing way and is communicated with the liquid cavity (14); the annular rubber cylinder (2) protrudes from the inner side wall of the shell (1) to the mounting axis of the drill rod (4).

2. A wellhead deflector according to claim 1, characterised in that said casing (1) comprises an upper casing (11) and a lower casing (12); the upper shell (11) comprises an upper flange (111) and an annular upper inner side wall (112) which is vertically protruded downwards on the inner ring of the upper flange (111); the lower shell (12) comprises a lower flange plate (121), an annular lower inner side wall (122) protruding upwards vertically at the inner ring of the lower flange plate (121), and an annular outer side wall (123) protruding between the inner ring and the outer ring of the lower flange plate (121); the top end of the annular outer side wall (123) is detachably connected with the upper flange (111), and the annular upper inner side wall (112) and the annular lower inner side wall (122) are correspondingly formed into the annular notch (13); the water inlet (1231) and the water outlet (1232) are formed in the annular outer side wall (123).

3. A wellhead deflector according to claim 2, characterised in that the lower flange (121) is fastened to the wellhead (3) by means of bolts (5).

4. A wellhead fluid director as claimed in claim 2, wherein the top end of said annular outer side wall (123) is screwed to said upper flange (111).

5. A wellhead deflector according to any of claims 1-4, characterized in that the inlet (1231) is fitted with an inlet valve (6); and a water outlet valve (7) is arranged at the water outlet (1232).

6. A wellhead deflector according to claim 4, characterised in that said annular rubber sleeve (2) comprises a mounting portion (21) and an expansion portion (22); the mounting part (21) is fixedly attached to the inner wall of the liquid cavity (14) and avoids the water inlet (1231) and the water outlet (1232); the expansion part (22) is of an annular structure, the cross section of the expansion part is U-shaped, the expansion part and the installation part (21) are connected in a sealing mode to form a whole, and the expansion part protrudes from the annular notch (13) to the outer side of the liquid cavity (14).