Intubate well cementing valve
Technical field
The utility model relates to a kind of bushing pipe sealing circulation cementing unit applied in oil-water well bushing pipe secondary well shaft fixing technology, is specifically related to one
intubate well cementing valve.
Background technology
Oil field, Eastern China generally enters middle and advanced stage exploitation, and particularly some old wells covers damage serious, and is much multistage, multiple spot cover damage, causes very large difficulty to the exploitation in oil field.Bushing pipe secondary well shaft fixing technology is a kind of effective ways, particularly multistage casing damaged well of administering casing damaged well, combines often carry out the comprehensive regulation with the shutoff of oil-water-layer.In prior art, the well cementation of most bushing pipe secondary all adopts hydraulic suspension hanging device complementary sleeves float shoe to realize bushing pipe to give up and deliver and well cementation object, and this device exists the shortcomings such as complex structure, cost is high, complicated operation, reliability are low.
Summary of the invention
The utility model object is development replacement liquid gland pipe hanger, meets the requirement of bushing pipe secondary well shaft fixing technology, provide a kind of "
intubate well cementing valve ", this well cementing valvereasonable in design, reliability is high, good airproof performance, and after can not only effectively preventing from cementing the well, cement paste backflow, removes the later stage from and sweep plug flow chart, and significantly shorten construction period, reduces construction cost.
To achieve these goals, the utility model is achieved through the following technical solutions: main technical scheme is, a kind of
intubate well cementing valve, comprises intubate and well cementing valve, described well cementing valve primarily of well cementing valve body,sliding sleeve and level pressure ball seat parts
composition.
described well cementing valve body is primarily of being threaded successively and be the top connection of hollow structure, center tap and lower contact composition.
describedsliding sleeve can be arranged on by axial slip
top connection and center tap binding site withbetween sleeve base,
pass throughsliding sleeve shear pin with
well cementing valve body is affixed.
describedlevel pressure ball seat parts are arranged on
in the inner chamber of lower contact, be placed in intubate andthe same shaft centre line position of sliding sleeve.
described intubate coordinates with sliding sleevearrange,
described intubatebottom is set to undergauge ledge structure, to be formed
intubateundergauge section,
intubate is topped bar and intubate is got out of a predicament or an embarrassing situation.
preferably, at described sliding sleeveupper-end part of driving installed to be structure as a whole with sliding sleeve and with
intubateundergauge segment length
suitable annularpawl spring, sliding sleeve upper position be respectively equipped with
it is corresponding that intubate is topped bar and intubate is got out of a predicament or an embarrassing situationsliding sleeve
top bar andsliding sleeve is got out of a predicament or an embarrassing situation, and sliding sleeve is provided with the sliding sleeve leakage hole matching to realize the state that opens or closes with valve body leakage hole, is respectively embedded with twice sliding sleeve O-ring seals at the two ends up and down of valve body leakage hole.
preferably, described inlevel pressure ball seat parts primarily of level pressure ball seat and steel ball composition, level pressure ball seat by ball seat shear pin with
lower contact connects,the cylindrical of level pressure ball seat is embedded with ball seat O-ring seals.
preferably, in described intubatebe provided with inner via hole, intubate cylindrical be at least embedded with one intubate O-ring seals, be placed in
intubatethe upper end position of undergauge section.
preferably, bylevel pressure ball seat and sleeve base form valve cavity jointly,
the upper end inner wall position of lower contact be provided with respectively withthe fluid course that valve body leakage hole and valve cavity communicate.
preferably, well cementing valve body is respectively by top connectionwith
lower contactbe threaded with sleeve pipe and sawtooth screen casing, the upper end of intubate is connected with tubing round thread by intubate internal thread.
The utility model compared with prior art tool has the following advantages:
1, the utility model reasonable in design, reliability is high, good airproof performance, and after can not only effectively preventing from cementing the well, cement paste backflow, removes the later stage from and sweep plug flow chart, and significantly shorten construction period, reduces construction cost.
2, because being all embedded with O-ring seals on intubate cylindrical, on the two ends up and down of valve body leakage hole and the cylindrical of level pressure ball seat, guarantee effectively to realize sealing circulation for slurry cementing technology object.
3, because being provided with level pressure ball seat parts, before construction, intubate sealing can be verified, safe and reliable.
4, originally
well cementing valve meetsthe instructions for use of all size bushing pipe secondary well shaft fixing technology.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
in figure: 1, intubate, 11,intubate internal thread
, 12,intubate O-ring seals
, 13, intubate undergauge section, 14, intubate tops bar, 15, intubate gets out of a predicament or an embarrassing situation, 2, well cementing valve body, 21, top connection, 22, center tap, 23, lower contact, 24,valve body leakage hole
, 25,fluid course
, 26,valve cavity
, 27,sawtooth screen casing
, 3,sliding sleeve
, 31, annularpawl spring
, 32,sliding sleeve
top bar, 33,sliding sleeve is got out of a predicament or an embarrassing situation
, 34,sliding sleeve leakage hole
, 35,sliding sleeve O-ring seals
, 36,sleeve base
, 37,sliding sleeve shear pin
, 4,level pressure ball seat
, 41,steel ball
, 42,ball seat O-ring seals
, 43,ball seat shear pin.
Detailed description of the invention
Below by non-limiting example, set forth the utility model further, understand the utility model.
Embodiment
As shown in Figure 1, a kind of
intubate well cementing valve, comprises intubate and well cementing valve, described well cementing valve primarily of well cementing valve body,sliding sleeve and level pressure ball seat parts
composition.
described well cementing valve body is primarily of being threaded successively and be the top connection of hollow structure, center tap and lower contact composition.
describedsliding sleeve can be arranged on by axial slip
the groove that top connection and center tap binding site are formed withbetween sleeve base,
pass throughsliding sleeve shear pin with
well cementing valve body is affixed.
describedlevel pressure ball seat parts are arranged on
in the inner chamber of lower contact, be placed in intubate andthe same shaft centre line position of sliding sleeve.
described intubate coordinates with sliding sleevearrange,
described intubatebottom is set to undergauge ledge structure, to be formed
intubateundergauge section,
intubate is topped bar and intubate is got out of a predicament or an embarrassing situation.
at described sliding sleeveupper-end part of driving installed to be structure as a whole with sliding sleeve and with
intubateundergauge segment length
suitable annularpawl spring, sliding sleeve upper position be respectively equipped with
it is corresponding that intubate is topped bar and intubate is got out of a predicament or an embarrassing situationsliding sleeve
top bar andsliding sleeve is got out of a predicament or an embarrassing situation, and sliding sleeve is provided with the sliding sleeve leakage hole matching to realize the state that opens or closes with valve body leakage hole, is respectively embedded with twice sliding sleeve O-ring seals at the two ends up and down of valve body leakage hole.Realize sealing with sliding sleeve outer wall.
describedlevel pressure ball seat parts primarily of level pressure ball seat and steel ball composition, level pressure ball seat by ball seat shear pin with
lower contact connects,the cylindrical of level pressure ball seat is embedded with ball seat O-ring seals, is formed with valve cavity and seal.
in described intubatebe provided with inner via hole, intubate cylindrical be embedded with 8 road intubate O-ring seals, realize sealing with sliding sleeve inwall, be placed in
intubatethe upper end position of undergauge section.
bylevel pressure ball seat and sleeve base form valve cavity jointly,
the upper end inner wall position of lower contact be provided with respectively withthe fluid course that valve body leakage hole and valve cavity communicate.
well cementing valve body is respectively by top connectionwith
lower contactbe threaded with sleeve pipe and sawtooth screen casing, the upper end of intubate is connected with tubing round thread by intubate internal thread.
The external diameter of sliding sleeve is 116mm, and intubate inner via hole diameter is 50mm; Returning slotting sealing load is 35Mpa, and level pressure ball seat is opened under 12-14Mpa pressure.
Further illustrate this intubate below
the use procedure of well cementing valve:
1) intubate is inserted sliding sleeve,
intubate is got out of a predicament or an embarrassing situationact on sliding sleeve get out of a predicament or an embarrassing situation promote sliding sleeve move down until cut off sliding sleeve shear pin, now set on sliding sleeve sliding sleeve leakage hole coincide with valve body leakage hole and is communicated with, open circulation canal thus, just suppressing 12-14Mpa and cutting off ball seat shear pin and can carry out circulation cement slurry cementing;
2) when circulation cement slurry cementing terminates, intubate extracted by upper lifting pipe post,
intubate is topped bar and is acted onsliding sleeve is topped bar and is passed through
annularpawl spring drive sliding sleeve moves until
annularpawl spring is given prominence to position and is entered
intubatein undergauge section, now set on sliding sleeve sliding sleeve leakage hole and valve body leakage hole are thrown off, and realize circulation canal and close, and stop cement paste backflow;
3) continue upper lifting pipe post, extract intubate anti-flushing well, wash out superfluous water mud, complete whole well shaft fixing technology.
In sum, the utility model reasonable in design, reliability is high, good airproof performance, and after can not only effectively preventing from cementing the well, cement paste backflow, removes the later stage from and sweep plug flow chart, and significantly shorten construction period, reduces construction cost.