CN111456660A

CN111456660A - Balanced type full-bore high-pressure control valve

Info

Publication number: CN111456660A
Application number: CN202010292825.0A
Authority: CN
Inventors: 顾国才; 李�浩; 杨传还; 董玉涛
Original assignee: Yancheng Dagang Petroleum Tools Factory Co ltd
Current assignee: Yancheng Dagang Petroleum Tools Factory Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-07-28

Abstract

The invention discloses a balanced type full-bore high-pressure control valve, which comprises: the valve body the upper end of valve body is provided with inlet channel the lower extreme of valve body is provided with outlet channel from last gland nut, sealed ball seat and the foraminiferous ball seat down having set gradually in the valve body between inlet channel and the outlet channel the lower extreme of foraminiferous ball seat is provided with the spring groove the spring inslot is provided with the pressure spring rather than mutually supporting, pressure spring's upper end and foraminiferous ball seat down offset, pressure spring's lower extreme and valve body offset be provided with the sealed spheroid rather than mutually supporting between sealed ball seat and the foraminiferous ball seat be provided with the connecting channel who communicates each other with inlet channel and outlet channel in the sealed spheroid the bilateral symmetry of sealed spheroid is provided with switch knob.

Description

Balanced type full-bore high-pressure control valve

Technical Field

The invention relates to well control equipment, in particular to a balanced type full-bore high-pressure control valve.

Background

The control valve is a key part of a well control device, is one of blowout prevention tools in a well, and is mainly used as a manual control valve in a drilling circulation system to control the passing of liquid or objects in the circulation process. The internal diameter is inconsistent about current control valve latus rectum spheroid, and the axiality is lower, takes place to block up or liquid deposit siltation leads to the spheroid to open when object passes through in the liquid, simultaneously, can not guarantee under high temperature high pressure that the control valve can open or close fast at any time, and the inefficacy leads to the blowout accident under emergency easily, and the safety coefficient is poor, can not guarantee the pollution of equipment and personnel's safety and environment.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the balance type full-bore high-pressure control valve with high safety coefficient is provided.

In order to solve the technical problems, the invention adopts the technical scheme that: full latus rectum high pressure control valve of balanced type includes: the valve body, the upper end of valve body is provided with inlet channel the lower extreme of valve body is provided with outlet channel the valve body between inlet channel and outlet channel from last gland nut, sealed ball seat and foraminiferous ball seat down having set gradually in the valve body, the lower extreme of foraminiferous ball seat is provided with the spring groove the spring inslot is provided with the pressure spring rather than mutually supporting, pressure spring's upper end and foraminiferous ball seat counterbalance down, pressure spring's lower extreme and valve body counterbalance, be provided with the sealed spheroid rather than mutually supporting between sealed ball seat and the foraminiferous ball seat, be provided with the connecting channel who communicates each other with inlet channel and outlet channel in the sealed spheroid, the bilateral symmetry of sealed spheroid is provided with the switch knob, the switch knob rotates respectively and sets up on the valve body, switch knob, Be provided with balanced chamber respectively between sealed ball seat, foraminiferous ball seat and the sealed spheroid on the bilateral symmetry of foraminiferous ball seat down is provided with balanced through-hole, the upper end and the balanced chamber of balanced through-hole communicate each other, the lower extreme and the exit channel of balanced through-hole communicate each other switch knob stretches out one of valve body and serves and be provided with the knob spanner respectively switch knob stretches out one of valve body and serves and still is provided with 90 degrees rotary grooves respectively switch knob stretches out one of valve body is last be provided with the stopper of mutually supporting with 90 degrees rotary grooves switch knob and valve body on the sealed ball seat and valve body, be provided with the sealed pad of high temperature resistant between switch knob and the valve body respectively.

The invention has the advantages that: the balanced type full-path high-pressure control valve has the advantages that balanced type opening is realized (on one hand, the ball body is guaranteed to be opened or closed under the condition of pressure balance, on the other hand, the ball body is forcibly opened or closed by utilizing the double wrench in a balanced manner, the problem that the ball body cannot be opened under the condition of high pressure, even if the ball body and the valve body are forcibly opened, safety accidents can be caused due to the fact that the ball body and the valve body can be damaged, and the effect of emergency control cannot be achieved is solved), a full-path channel is formed (namely, the left inner diameter and the right inner diameter of the full-path ball body are consistent, the coaxiality is high, the phenomenon that the ball body cannot be opened due to blocking or deposition of circulating liquid sediment when objects in circulating liquid pass through the circulating liquid is avoided, and a good self-protection effect is achieved on the ball body and the full-path channel), high-pressure resistance and pressure, Spacing accuracy (by the outside stopper of valve body with switch knob 90 degrees rotary groove mutually support spacing, ensure that sealed spheroid becomes 90 degrees rotations in the valve body, the switch promptly, and there is obvious "open" or "close" direction mark outside the valve body), sealed safe (all sealed pad of passageway all adopt high temperature seal pad, elasticity is strong, sealed effectual, high temperature resistant high pressure resistant) etc. characteristics, its is small, light in weight, compact structure, convenient operation is nimble, reduce intensity of labour, improved work efficiency greatly, factor of safety is high.

Drawings

FIG. 1 is a schematic diagram of the closed state of the balanced full-bore high pressure control valve of the present invention.

Fig. 2 is a schematic top enlarged view of the switch knob shown in fig. 1.

FIG. 3 is a schematic structural diagram of the open state of the balanced full-bore high pressure control valve of the present invention.

Fig. 4 is a schematic top enlarged view of the switch knob in fig. 3.

In the figure: 1. the valve body, 2, inlet channel, 3, outlet channel, 4, gland nut, 5, sealed ball seat, 6, foraminiferous ball seat down, 7, spring groove, 8, pressure spring, 9, sealed spheroid, 10, interface channel, 11, switch knob, 12, balanced chamber, 13, balanced through-hole, 14, knob spanner, 15, 90 degree rotation grooves, 16, stopper.

Detailed Description

The details of the present invention are described below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, 3, and 4, the balanced full-bore high-pressure control valve includes: the valve comprises a valve body 1, an inlet channel 2 is arranged at the upper end of the valve body 1, an outlet channel 3 is arranged at the lower end of the valve body 1, a compression nut 4, a sealing upper ball seat 5 and a lower ball seat 6 are sequentially arranged in the valve body 1 between the inlet channel 2 and the outlet channel 3 from top to bottom, a spring groove 7 is arranged at the lower end of the lower ball seat 6, a compression spring 8 matched with the spring groove 7 is arranged in the spring groove 7, the upper end of the compression spring 8 is abutted against the lower ball seat 6, the lower end of the compression spring 8 is abutted against the valve body 1, a sealing ball body 9 matched with the sealing upper ball seat 5 and the lower ball seat 6 is arranged between the sealing upper ball seat 5 and the lower ball seat 6, a connecting channel 10 communicated with the inlet channel 2 and the outlet channel 3 is arranged in the sealing ball body 9, and switch knobs 11 are symmetrically arranged at two sides of the, switch knob 11 rotates respectively and sets up on valve body 1 switch knob 11, sealed ball seat 5, foraminiferous lower ball seat 6 and sealed spheroid 9 between be provided with balanced chamber 12 respectively foraminiferous the bilateral symmetry of foraminiferous lower ball seat 6 is provided with balanced through-hole 13, the upper end and the balanced chamber 12 of balanced through-hole 13 communicate each other, the lower extreme and the exit channel 3 of balanced through-hole 13 communicate each other switch knob 11 stretches out one of valve body 1 and serves and be provided with knob spanner 14 respectively switch knob 11 stretches out one of valve body 1 and serves and still is provided with 90 degrees swivelling chute 15 respectively switch knob 11 is provided with the stopper 16 of mutually supporting with 90 degrees swivelling chute 15 on the valve body 1 it seals up to be provided with high temperature resistant sealed pad respectively between ball seat 5 and the valve body 1, between switch knob 11 and the valve body 1.

When the manual pressure control valve is installed, the upper end and the lower end of the valve body 1 are connected to an oil pipe, the inlet channel 2 is connected with the oil pipe upwards, the outlet channel is connected with the oil pipe downwards, the manual pressure control valve is mainly used in a drilling circulation system and used for controlling liquid or objects to pass in the circulation process, the manual pressure control valve is used for controlling the underground pressure of the oil pipe in operation, the compression spring 8 is placed into the spring groove 7, the lower ball seat 6 with the hole, the sealing ball body 9 and the upper ball seat 5 are sequentially placed into the valve body 1 from top to bottom, and finally the compression nut 4 is locked in the valve body 1 in a threaded mode and is adjustable in tightness, the tightness between the compression nut 4 and the compression spring 8 ensures that the whole sealing effect of the valve body is guaranteed, meanwhile, the safety of the ball body is guaranteed to be opened, and two.

When the underground circulation control valve works, when the sealing ball body 9 is in an open state, circulation liquid is injected from an upper oil pipe during normal operation, the circulation liquid enters the valve body 1 through the inlet channel 2, and then sequentially passes through the compression nut 4, the sealing upper ball seat 5, the connecting channel 10 in the sealing ball body 9, the lower ball seat 6 with holes and the outlet channel 3, the circulation liquid is immediately stopped from being injected when the pressure at the bottom of a well is too high, the switch knob 11 is rapidly pulled by the two knob wrenches 14 at the same time so as to drive the sealing ball body 9 to realize 90-degree rotation (the limit is mutually matched with the 90-degree rotating groove 15 on the switch knob 11 for limiting), and the control valve is closed to ensure the temporary safety of equipment personnel. However, if the well pressure is too high, the control valve must be opened, the pressure relief pipe is connected from the upper oil pipe and is connected to the pressure relief tank, the pressure relief tank can be directly relieved, in order to ensure that the control valve can be opened safely under the condition of high pressure without damaging the sealing ball body 9, the perforated lower ball seat 6 is specially designed, the pressure enters the switch knob 11, the sealing upper ball seat 5, the balance cavity 12 between the perforated lower ball seat 6 and the sealing ball body 9 from the balance through holes 13 at two sides of the perforated lower ball seat 6 respectively, at the moment, the pressure in the balance cavity 12 is balanced with the pressure in the valve body channel, no pressure difference exists, the sealing ball body 9 has certain protection effect and is easy to open, in order to avoid the situation that the single-side switch knob 11 is unbalanced in force, the knob groove on the ball body is damaged, and the switch emergency function is lost, the double switch knob 11 is pulled by the double-knob wrench 14 at the same time to, this ensures from many aspects that the valve body is opened safely and that the components of the valve body are not damaged.

Claims

1. Full latus rectum high pressure control valve of balanced type, its characterized in that: the method comprises the following steps: the valve body (1) is provided with an inlet channel (2) at the upper end of the valve body (1), an outlet channel (3) is arranged at the lower end of the valve body (1), a gland nut (4), a sealing upper ball seat (5) and a lower ball seat (6) are sequentially arranged in the valve body (1) between the inlet channel (2) and the outlet channel (3) from top to bottom, a spring groove (7) is arranged at the lower end of the lower ball seat (6), a gland spring (8) matched with the spring groove (7) is arranged in the spring groove (7), the upper end of the gland spring (8) is abutted against the lower ball seat (6), the lower end of the gland spring (8) is abutted against the valve body (1), a sealing ball body (9) matched with the gland spring groove is arranged between the sealing upper ball seat (5) and the lower ball seat (6), and a connecting channel (9) communicated with the inlet channel (2) and the outlet channel (3) is arranged in the sealing ball body (9) 10) Switch knobs (11) are symmetrically arranged on two sides of the sealing ball body (9), the switch knobs (11) are respectively and rotatably arranged on the valve body (1), balancing cavities (12) are respectively arranged among the switch knobs (11), the sealing upper ball seat (5), the perforated lower ball seat (6) and the sealing ball body (9), balancing through holes (13) are symmetrically arranged on two sides of the perforated lower ball seat (6), the upper ends of the balancing through holes (13) are mutually communicated with the balancing cavities (12), the lower ends of the balancing through holes (13) are mutually communicated with the outlet channel (3), knob wrenches (14) are respectively arranged at one ends of the switch knobs (11) extending out of the valve body (1), 90-degree rotating grooves (15) are respectively arranged at one ends of the switch knobs (11) extending out of the valve body (1), and limiting blocks (16) mutually matched with the 90-degree rotating grooves (15) are arranged on the valve body (1), and high-temperature-resistant sealing gaskets are respectively arranged between the upper sealing ball seat (5) and the valve body (1) and between the switch knob (11) and the valve body (1).