One kind is exempted to be buckled to rotary tail running tool and method
Technical field
Exempt to be buckled to rotary tail running tool and side the present invention relates to natural gas exploration and development field more particularly to one kind
Method.
Background technique
Drilling liner cementing can save oil/gas well development cost, save social resources.For this purpose, people have invented " extension hanger "
(201510956001.8), " a kind of oil/gas well extension hanger " (201820244595.9), " buckling type tail with slips
The liner hanger tools such as hanger " (201711030338.1) are used to carry out the drilling liner cementing operation of oil/gas well.But these are sent out
Bright all to there is identical defect: structure is complicated for tool, and production and processing is at high cost, and machining accuracy is difficult to be guaranteed, and performance is not
Stablize, high pressure circulation is difficult to set up during setting of casing, is hampered during setting of casing, blocks and tail pipe cannot be rotated, sitting
It needs to be buckled to the disadvantages of giving up operation after extension.
Summary of the invention
Exempt to be buckled to rotary tail running tool the purpose of the present invention is to provide one kind, to solve to exist in the prior art
Foregoing problems.
To achieve the goals above, The technical solution adopted by the invention is as follows:
One kind is exempted to be buckled to rotary tail running tool, and the tool includes central tube and tail pipe connecting cylinder, and the tail pipe connects
Connect cylinder is nested on the central tube by connecting ball device;
The connection ball device includes the mandril that the tail pipe connecting cylinder is arranged in, in connected ball and centrally disposed pipe
The ball seat in portion,
In a first state, the connected ball is mounted among the ball seat and the mandril;
In the second state, the ball seat and the mobile deviation connected ball of the mandril.
Preferably, in the first state, the ball seat is mounted on inside central tube by ball seat pin.
Preferably, the mandril is fixed by jogger hole, and the ball seat pin is fixed by pin hole, and the connected ball is set
It sets in connecting hole.
Preferably, the jogger hole and the connecting hole are 6.
Preferably, the tail pipe connecting cylinder includes shear pin, rubber plug body, rubber plug, rubber plug skeleton and rubber plug seat, the glue
Cock body is connected through a screw thread with the rubber plug seat, and rubber plug is cased on the rubber plug body and is fixed to be formed by the rubber plug seat
The tail pipe rubber plug of one entirety;The tail pipe rubber plug is fixed on the lower inside of tail pipe connecting cylinder by shear pin.
Preferably, block head is installed on the shear pin, between the rubber plug and rubber plug of the tail pipe rubber plug, rubber plug with
Pressure ring is installed, for compressing rubber plug between rubber plug body.
Preferably, it is machined with drill rod thread on the inside of the central tube upper end and outside is machined with a recess step and can be used for now
Field connection drilling tool.
Preferably, jogger hole top and lower part are connect on the outside of central tube, on the inside of central tube on the inside of the tail pipe connecting cylinder
Pacify respectively on the outside of hole top and lower part and ball seat, on the outside of mandril and on the inside of jogger hole inside, pin hole between block head outside
Equipped with sealing ring.
Exempt to be buckled to rotary tail feeding method it is a further object to provide one kind, comprising the following steps:
S1 will exempt from back-off rotary tail running tool and be connected on solid completion tubular string, and decentralization is to bottom hole location and is bored
Well liquid cycle operation;
S2 puts into ball of giving up after completing cycle operation, builds the pressure, make to pipe string after ball of giving up drops down onto ball seat position
The upper and lower section of ball seat forms pressure difference and ball seat is cut off cutting;
S3, the ball of giving up are moved down simultaneously with ball seat, are dropped down onto rubber plug seat, then above propose central tube reality by well head
Existing tail pipe is sent into process.
Preferably, during tripping in, it can be rotated at any time by turntable in case of exceptional circumstances and drive tail pipe rotation or carry out
Cycle operation.
The beneficial effects of the present invention are:
Tail can safely and smoothly be realized by exempting from back-off rotary tail running tool and method, the invention the present invention provides one kind
Pipe setting of casing guarantees that drilling liner cementing operation is gone on smoothly, and tail pipe string, which is lowered into well head pitching behind shaft bottom and builds the pressure, gives up, it is ensured that rotation
Turn tail pipe and exempt to be buckled to and can smoothly be sent into, implementation method is reliable;Simple structure design is easy to process simultaneously, reduces production system
Cause this.
Detailed description of the invention
Fig. 1 is the front view structure half-section diagram of the embodiment of the present invention;
Fig. 2 be pitching of the embodiment of the present invention build the pressure ball seat cut off cut after front view structure half-section diagram;
Fig. 3 is the front view structure half-section diagram after the embodiment of the present invention is given up;
Fig. 4 is the details enlarged drawing that ball device is connected in Fig. 1;
Fig. 5 is the details enlarged drawing that ball device is connected in Fig. 3;
Fig. 6 is the details enlarged drawing of tail pipe connecting cylinder lower part;
1-central tube, 2-tail pipe connecting cylinders, 3-mandrils, 4-connected balls, 5-ball seats are cut off, 6-ball seats, and 7-block
Head, 8-shear pins, 9-springs, 10-rubber plug bodies, 11-rubber plugs, 12-rubber plug skeletons, 13-pressure rings, 14-fixed spiral shells
Nail, 15-rubber plug seats, 16- give up ball, 17- connected ball pedestal.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to
Limit the present invention.
Attached drawing involved in embodiment is semi-cutaway, and top half is sectional view, and lower half portion is outside drawing.
Embodiment 1
Exempt to be buckled to rotary tail running tool the present embodiment provides one kind, by central tube, tail pipe connecting cylinder, mandril, connection
Ball, connected ball pedestal, ball seat, ball seat pin, composition;Tail pipe connecting cylinder middle and lower part is evenly distributed in 6 jogger holes, lower circumference
It is evenly equipped with 4 pin holes;Central tube lower circumferential is evenly equipped with 6 connecting holes;Tail pipe connecting cylinder is using on jogger hole and central tube
Connecting hole be connected and fixed by connected ball and mandril;It is equipped with connected ball corresponding position by shear pin on the inside of central tube
Ball seat accepts the connected ball pedestal of connected ball, in a first state, as shown in Figure 1, ball containing one between connected ball and ball seat
Seat is corresponding with connection ball position, in the second state, as shown in Fig. 2, built the pressure after ball of giving up is put by well head, ball seat
Pressure difference is formed between upper-lower section, and ball seat is cut off interruption by the pressure difference, so that give up ball and ball seat moves downwardly together,
It drops down onto rubber plug seat, connected ball does not have supporting point at this time, and toward central tube medial movement, active force disappears between connected ball and mandril
It loses, central tube is above mentioned by well head and realizes operation of giving up, as shown in Fig. 3.
The rotary tail running tool of exempting to be buckled to provided in the present embodiment further includes shear pin, rubber plug body, rubber plug, rubber plug
Skeleton and rubber plug seat are cased with glue on the rubber plug body as shown in fig. 6, the rubber plug body is connected through a screw thread with the rubber plug seat
It fills in and is fixed the tail pipe rubber plug to form an entirety by the rubber plug seat;The tail pipe rubber plug is fixed by shear pin
In the lower inside of tail pipe connecting cylinder.Block head is installed on the shear pin, the rubber plug and rubber plug of the tail pipe rubber plug it
Between, between rubber plug and rubber plug body pressure ring is installed, for compressing rubber plug.
It is machined with drill rod thread on the inside of central tube upper end described in the present embodiment and outside is machined with a recess step and can be used
Drilling tool is connected on site, and jogger hole top and lower part are connect on the outside of central tube, on the inside of central tube on the inside of the tail pipe connecting cylinder
Pacify respectively on the outside of hole top and lower part and ball seat, on the outside of mandril and on the inside of jogger hole inside, pin hole between block head outside
Equipped with sealing ring.
In addition, rubber plug body is connected through a screw thread with rubber plug seat, it is cased with rubber plug on rubber plug body and is fixed by rubber plug seat
Form the tail pipe rubber plug an of entirety;Tail pipe rubber plug is fixed on the lower inside of tail pipe connecting cylinder by shear pin.
Embodiment 2
The present embodiment provides a kind of rotary tail running tools of exempting to be buckled to using in embodiment 1 to consolidate tail pipe feeding shaft bottom
The use of well operates, comprising the following steps:
Tool documented in embodiment 1 is connected on solid completion tubular string, is transferred by design requirement to bottom hole location,
During tripping in, such as be hampered, block complex situations can at any time by turntable rotate drive tail pipe rotation or carry out cycle operation, when
Tail pipe string smoothly carries out circulation of drilling fluid operation behind shaft bottom;Ball of giving up is put into well head after completion cycle operation, wait give up
Ball builds the pressure to pipe string after dropping down onto ball seat position, so that the upper and lower section of ball seat is formed pressure difference to which ball seat is cut off cutting, makes to lose
Handball is moved down with ball seat, is dropped down onto rubber plug seat as shown in Fig. 2, then above mention central tube by well head and realize operation of giving up
As shown in Fig. 3;Central tube is returned after operation of giving up is smooth and is inserted in tail pipe connecting cylinder, and carries out cementing operation,
Drilling rod rubber plug is discharged in well head after cementing, and is completed for slurry, bruising operation is again stepped up central tube after bruising,
When central tube is mentioned to 2-5m outside tail pipe connecting cylinder, bell mouth operation is rinsed to tail pipe connecting cylinder, finally above mentions drilling tool,
Central tube is proposed into well head;Complete the operation of tail pipe cementing well.
By using above-mentioned technical proposal disclosed by the invention, following beneficial effect has been obtained:
Tail can safely and smoothly be realized by exempting from back-off rotary tail running tool and method, the invention the present invention provides one kind
Pipe setting of casing guarantees that drilling liner cementing operation is gone on smoothly, and tail pipe string, which is lowered into well head pitching behind shaft bottom and builds the pressure, gives up, it is ensured that rotation
Turn tail pipe and exempt to be buckled to and can smoothly be sent into, implementation method is reliable;Simple structure design is easy to process simultaneously, reduces production system
Cause this.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
Depending on protection scope of the present invention.