CN215485913U

CN215485913U - A new type of flexible drilling tool for ultra-short radius

Info

Publication number: CN215485913U
Application number: CN202121172810.7U
Authority: CN
Inventors: 谢威; 鄢红江; 曹纪元
Original assignee: Guiyang Zhengshan Petroleum Technology Co ltd
Current assignee: Guiyang Zhengshan Petroleum Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-01-11
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a novel flexible drilling tool for ultra-short radius, which comprises an elastic retaining ring, a ball key, a sealing seat, an upper joint, a first seal, a washer, a spline cylinder, a spring, a second seal, and a lower The joint; the top of the spline cylinder is inserted with an upper joint, the bottom is connected to a sealing seat, a lower joint is sleeved on the outer side of the bottom of the sealing seat, the bottom of the spline cylinder is threadedly connected to the lower joint, the bottom of the lower joint is provided with female threads, the upper joint, the sealing seat and the lower joint are There is a through water hole in the joint, an elastic retaining ring is arranged at the connection gap between the top of the joint and the spline cylinder, a ball key is installed at the bottom of the upper joint, a seal is installed in the connection gap between the upper joint and the sealing seat, and the sealing seat and the lower joint are installed. A spring is installed at the joint connection, a washer is installed on the outside of the spring, and a second seal is installed at the connection gap between the sealing seat and the lower joint. The utility model effectively solves the problems of small modeling radius, long period, high cost, and uncontrollable drilling tools entering the target layer or the reforming layer of the conventional window-opening oblique drilling tools used for the reconstruction of old wells.

Description

Novel flexible drilling tool for ultra-short radius

Technical Field

The utility model relates to the field of petroleum drilling, in particular to a novel flexible drilling tool for an ultra-short radius.

Background

After long-term water injection development of domestic old oil fields, the oil field enters a high water cut period, the heterogeneity in an oil layer is enhanced, the oil-water viscosity ratio is high, the water injection efficiency is low, the ineffective water circulation is serious, and the long-term water injection development also causes the change of physical parameters such as the temperature and the pressure of the oil layer. In order to relieve the contradiction of storage and production unbalance, improve the injection and production relation and improve the residual oil utilization degree, a well pattern is often subjected to new well drilling encryption or old well sidetracking. Compared with the new well drilling, the old well sidetracking utilizes the original shaft to directionally drill to the position of the residual oil, the drilling period is short, the operation cost is low, the oil drainage area of a single well can be effectively increased, and the yield of the single well is further improved.

However, the conventional sidetracking drilling technology can not realize the drilling operation with the borehole curvature larger than 10 degrees/m and the deflecting radius smaller than 3m, and the cost is too high because long-section ineffective deflecting drilling is needed for drilling the target layer position. The hydraulic jet sidetracking technology represented by high-pressure water jet utilizes a mode of water jet impact rock breaking to drill. The aperture is 30-50mm, the penetration distance is 50-100m, but sidetracking orientation is inaccurate, the flow guiding capability is limited, and the effective communication distance is insufficient.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the technical defects and provide a novel flexible drilling tool for ultra-short radius.

In order to solve the problems, the technical scheme of the utility model is as follows: a novel flexible drilling tool for ultra-short radius comprises an elastic retainer ring, a ball head key, a sealing seat, an upper joint, a first sealing element, a gasket, a spline cylinder, a spring, a second sealing element and a lower joint;

the utility model discloses a sealing device, including spline section of thick bamboo, top connection, sealing seat, upper joint, sealing seat bottom, lower clutch, spline section of thick bamboo bottom threaded connection, lower clutch, female screw thread, top connection, sealing seat and lower clutch, spline section of thick bamboo top is inserted and is established the top connection, the top connection top is equipped with the external screw thread, and the bottom is the bulb structure, and connects the sealing seat, the outside cover of sealing seat bottom establishes the lower clutch, spline section of thick bamboo bottom threaded connection is on the lower clutch, the lower clutch bottom is equipped with female screw thread, be equipped with the eye hole that runs through in top connection, sealing seat and the lower clutch, top connection gap department is equipped with circlip, top connection bottom installation bulb key, top connection and sealing seat connection gap installation sealing member one, sealing seat and lower clutch junction installation spring, spring outside installation packing ring, sealing seat and lower clutch connection gap department installation sealing member two.

Further, the ball head key circular arc section is abutted to the inner wall of the spline cylinder.

Furthermore, the top of the sealing seat is of a ball head structure matched with the bottom of the upper joint.

Further, the bottom of the inner wall of the spline cylinder and the top of the lower connector are provided with adaptive threads.

Further, the spring sets up horizontally, and one end butt seal receptacle, the other end butt packing ring.

Further, the two sealing members are two in total.

Compared with the prior art, the utility model has the advantages that: the utility model effectively solves the problems that the conventional windowing modeling inclined drilling tool for old well reconstruction has small modeling radius, long period and high cost, and the drilling tool enters a target layer or a reconstruction layer uncontrollably.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a configuration diagram of the present invention.

Fig. 3 is a structural view of the spline cylinder.

As shown in the figure: 1. circlip, 2, bulb key, 3, seal receptacle, 4, top connection, 5, sealing member one, 6, packing ring, 7, spline section of thick bamboo, 8, spring, 9, sealing member two, 10, lower clutch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, a novel flexible drilling tool for ultra-short radius comprises a circlip 1, a ball key 2, a sealing seat 3, an upper joint 4, a first sealing element 5, a gasket 6, a spline cylinder 7, a spring 8, a second sealing element 9 and a lower joint 10;

7 tops of spline section of thick bamboo are inserted and are established

top connection

4, 4 tops of top connection are equipped with the external screw thread, and the bottom is the bulb structure, and connects

seal receptacle

3, 3 bottom outside covers of seal receptacle establish

lower clutch

10, 7 bottom threaded connection of spline section of thick bamboo are on lower clutch 10, lower clutch 10 bottom is equipped with female screw, be equipped with the water hole that runs through in top connection 4, seal receptacle 3 and the

lower clutch

10, 4 tops of top connection and 7 joint departments of spline section of thick bamboo are equipped with

circlip

1, 4 bottom installation bulb keys 2 of top connection,

top connection

4 and 3 joint installation sealing member of seal receptacle 5,

seal receptacle

3 and 10 joint installation spring 8 of lower clutch 10 junction, 8 outside installation packing ring 6 of spring,

seal receptacle

3 and 10 joint department installation sealing member two 9 of lower clutch 10 joint.

The arc section of the ball head key 2 is abutted against the inner wall of the spline cylinder 7.

The top of the sealing seat 3 is of a ball head structure matched with the bottom of the upper joint 4.

And the bottom of the inner wall of the spline cylinder 7 and the top of the lower joint 10 are provided with adaptive threads.

The spring 8 is horizontally arranged, one end of the spring is connected with the sealing seat 3 in an abutting mode, and the other end of the spring is connected with the gasket 6 in an abutting mode.

The second sealing member 9 has two sealing members.

In specific use, the ball head key 2 is circumferentially limited and does not limit the rotation of the upper joint 4, so that the upper joint 4 can freely rotate 360 degrees around the axis head of the flexible drilling tool and can move 6 degrees in a single side, a water hole is designed in the middle, a water hole circulating channel is provided, the flexible drilling tools with different quantities can be connected according to the drilling depth, the flexible drilling tools are combined with other tools (a drill bit, a flexible drilling tool (MWD (measurement while drilling) and a drill rod) to perform old well reconstruction and horizontal well side drilling, the single-section rotation angle can reach 6 degrees, the modeling radius angle is high, and the sealing pressure is high.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A novel flexible drilling tool for ultrashort radius is characterized in that: the ball joint sealing device comprises an elastic retainer ring (1), a ball head key (2), a sealing seat (3), an upper joint (4), a first sealing piece (5), a gasket (6), a spline cylinder (7), a spring (8), a second sealing piece (9) and a lower joint (10);

the top of the spline cylinder (7) is inserted with an upper joint (4), the top of the upper joint (4) is provided with an external thread, the bottom of the spline cylinder is of a ball head structure and is connected with a sealing seat (3), the outer side of the bottom of the sealing seat (3) is sleeved with a lower joint (10), the bottom of the spline cylinder (7) is in threaded connection with the lower joint (10), the bottom of the lower joint (10) is provided with female threads, penetrating water hole holes are formed in the upper joint (4), the sealing seat (3) and the lower joint (10), an elastic retainer ring (1) is arranged at the joint gap between the top of the upper joint (4) and the spline cylinder (7), a ball head key (2) is arranged at the bottom of the upper joint (4), a sealing piece I (5) is arranged at the joint gap between the upper joint (4) and the sealing seat (3), a spring (8) is arranged at the joint of the sealing seat (3) and the lower joint (10), and a gasket (6) is arranged at the outer side of the spring (8), and a second sealing element (9) is arranged at the joint gap between the sealing seat (3) and the lower joint (10).

2. The novel ultra short radius flexible drill as claimed in claim 1, wherein: the circular arc section of the ball head key (2) is abutted against the inner wall of the spline cylinder (7).

3. The novel ultra short radius flexible drill as claimed in claim 1, wherein: the top of the sealing seat (3) is of a ball head structure matched with the bottom of the upper joint (4).

4. The novel ultra short radius flexible drill as claimed in claim 1, wherein: and adaptive threads are arranged at the bottom of the inner wall of the spline cylinder (7) and the top of the lower joint (10).

5. The novel ultra short radius flexible drill as claimed in claim 1, wherein: the spring (8) is horizontally arranged, one end of the spring is connected with the sealing seat (3) in an abutting mode, and the other end of the spring is connected with the gasket (6) in an abutting mode.

6. The novel ultra short radius flexible drill as claimed in claim 1, wherein: the second sealing element (9) has two sealing elements.