阅读说明：本技术 双向液压阻力式随钻震击器 (Bidirectional hydraulic resistance type drilling jar ) 是由 侯立东 于 2019-12-26 设计创作，主要内容包括：本发明的双向液压阻力式随钻震击器涉及钻具附件领域,上部花键外筒的下端螺扣连接了敲击锤外筒,敲击锤外筒下端螺扣配合连接活塞外筒,活塞外筒的下端螺扣连接钻具下接头；钻具上接头的下端延伸成一体地连接芯轴管,芯轴管下部的继续缩径延伸相继穿过敲击锤外筒、活塞外筒和内径收缩相互间隙配合的芯轴管下端的扶正套管；在敲击锤外筒中的两端的连接头处设有上敲击肩台和下敲击肩台、在该段的环形空间中的芯轴管上固定有敲击锤,活塞外筒段中的芯轴管上固定有活塞。在卡钻时根据需要对钻具施加上提力予以上击或对钻具施加下压力给与下击,双向液压阻力式随钻震击器具有更多的震击次数,可以在地面根据需要随时调整震击力以及延时震击等优势。(The invention discloses a bidirectional hydraulic resistance type drilling jar, which relates to the field of drilling tool accessories, wherein the lower end of an upper spline outer cylinder is in threaded connection with a knocking hammer outer cylinder; the lower end of the upper joint of the drilling tool extends to be integrally connected with a core shaft tube, and the lower part of the core shaft tube continues to reduce in diameter and extend to sequentially pass through the outer cylinder of the knocking hammer, the outer cylinder of the piston and a centering sleeve at the lower end of the core shaft tube with the inner diameter shrunk and mutually clearance-matched; an upper knocking shoulder and a lower knocking shoulder are arranged at the connecting heads at two ends in the outer cylinder of the knocking hammer, the knocking hammer is fixed on a core shaft tube in an annular space of the section, and a piston is fixed on the core shaft tube in the outer cylinder section of the piston. When the drill is stuck, the drilling tool is exerted with upward force or downward force according to the requirement, the bidirectional hydraulic resistance type drilling jar has more jarring times, and the jar force can be adjusted at any time on the ground according to the requirement, the jar is delayed, and the like.)

1. The bidirectional hydraulic resistance type drilling jar comprises a drilling tool upper joint (1), a driving core shaft tube (2), a knocking hammer (3), a piston (4) and a sleeved driven knocking hammer outer tube (7), and is characterized in that the lower end of a spline outer tube (6) at the upper part is in threaded connection with the knocking hammer outer tube (7), the lower end of the knocking hammer outer tube (7) is in threaded fit with a piston outer tube (8), and the lower end of the piston outer tube (8) is in threaded connection with a drilling tool lower joint (9); the lower end of an upper joint (1) of the drilling tool extends to be integrally connected with a core shaft tube (2), the outer diameter of the core shaft tube (2) and the inner diameter of a spline outer cylinder (6) are sleeved and overlapped in a clearance fit mode, a gland (10) in threaded fit and an inner disk root ring embedded in the gland are arranged at the upper opening of the spline outer cylinder (6) to seal and tightly clamp the periphery of the core shaft tube (2), and the lower part of the core shaft tube (2) continuously reduces in diameter and extends to sequentially pass through a knocking outer cylinder (7), a piston outer cylinder (8) and a centering sleeve (12) at the lower end of the core shaft tube (2) with the inner diameter shrinkage and mutual clearance fit; an upper knocking shoulder (13) and a lower knocking shoulder (14) are arranged at the connecting heads at the two ends in the knocking hammer outer cylinder (7), a columnar knocking hammer (3) is fixed on a core shaft tube (2) in the annular space of the section, a piston (4) is fixed on the core shaft tube (2) in the piston outer cylinder (8) section, the periphery of the piston (4) is in clearance fit with the inner ring of the piston outer cylinder (8), and a longitudinal oil guide through hole (17) is formed in the piston (4); a pressure transmission through hole (18) is arranged on the pipe wall at the tail part of the spline outer cylinder (6), a first oil injection hole (19) is arranged on the pipe wall at the tail part of the knocking hammer outer cylinder (7), and a second oil injection hole (20) is arranged on the pipe wall at the tail part of the piston outer cylinder (8).

2. The bi-directional hydraulic resistance-type drilling jar as recited in claim 1, wherein the rapping hammer (3) is fixed on the mandrel pipe (2) and runs upward in the inner annular space of the outer cylinder (7) of the rapping hammer to the upper rapping shoulder (13) and runs downward to the lower rapping shoulder (14).

3. The bi-directional hydraulic resistance-type drilling jar as claimed in claim 1 or 2, wherein the drilling tool upper joint (1), the mandrel pipe (2), the piston (4) and the knocking hammer (3) form an active operation jar structure.

4. The bi-directional hydraulic resistance type drilling jar as claimed in claim 1, 2 or 3, wherein the passive operation jar structure is formed by the spline outer cylinder (6) and its gland (10), the hammer outer cylinder (7), the piston outer cylinder (8), the centralizing sleeve (12) and the drill tool lower joint (9).

Technical Field

The invention relates to the field of drilling tool accessories, in particular to a bidirectional hydraulic resistance type drilling jar.

Background

Along with the increase of the number of horizontal wells and extended reach wells, sticking caused by various complex factors is more common, and when sticking occurs, the first stuck-releasing scheme is to shock the drilling tool. The traditional mechanical drilling jar utilizes a mechanical friction principle, a locking mechanism adopts a group of ribbed slips, the release of the slips is controlled by the deformation of an elastic sleeve under the action of pressure, but the jar threshold value is fixed, the lifting force is not easily transmitted to the jar when the well inclination is large, the service life of the well is short, and the failure rate of a mechanical structure is high. The hydraulic jar uses the damping action of hydraulic oil flowing in a small flow passage as a locking mechanism, and uses the release caused by the sudden change of the flow passage to strike in the jar, so as to form vibration in a drill string.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a bidirectional hydraulic resistance type drilling jar.

The bidirectional hydraulic resistance type drilling jar comprises a drilling tool upper joint, an integrally extended driving core shaft tube, a knocking hammer, a piston and a sleeved driven knocking hammer outer cylinder, wherein the lower end of a spline outer cylinder at the upper part is in threaded connection with the knocking hammer outer cylinder; the lower end of an upper joint of the drilling tool extends to be integrally connected with a core shaft tube, the outer diameter of the core shaft tube is sleeved and overlapped with the inner diameter of a spline outer tube in a clearance fit manner, a gland in threaded fit and an inner packing ring embedded in the gland are arranged at the upper opening of the spline outer tube to seal and tighten the periphery of the core shaft tube, and the lower part of the core shaft tube continues to reduce the diameter and extend to sequentially pass through a striking hammer outer tube, a piston outer tube and a centering sleeve at the lower end of the core shaft tube with the inner diameter shrinkage in clearance fit; an upper knocking shoulder and a lower knocking shoulder are arranged at the joints at two ends in the outer cylinder of the knocking hammer, a columnar knocking hammer is fixed on a core shaft pipe in an annular space of the section, a piston is fixed on the core shaft pipe in the outer cylinder section of the piston, the periphery of the piston is in clearance fit with an inner ring of the outer cylinder of the piston, and the piston is provided with a longitudinal oil guide through hole; the pipe wall of the tail part of the spline outer cylinder is provided with a pressure transmission through hole, the pipe wall of the tail part of the knocking hammer outer cylinder is provided with a first oil injection hole, and the pipe wall of the tail part of the piston outer cylinder is provided with a second oil injection hole.

As a further improvement of the invention, the knocking hammer is fixedly arranged on the mandrel pipe, and runs upwards in the inner ring space of the outer cylinder of the knocking hammer to knock on the upper knocking shoulder and runs downwards to knock on the lower knocking shoulder.

As a further improvement of the invention, the drilling tool upper joint, the mandrel pipe, the piston and the knocking hammer form an active operation jarring structure.

As a further improvement of the invention, a passive operation jarring structure is formed by the spline outer cylinder and a gland thereof, the outer cylinder of the knocking hammer, the outer cylinder of the piston, the centralizing sleeve and the lower joint of the drilling tool.

The two-way hydraulic resistance type drilling jar is reasonable in structural design and economical and practical, is connected to a bottom drilling tool assembly in a drilling process, and exerts upward force on the drilling tool or downward force on the drilling tool and downward impact on the drilling tool according to needs during drilling clamping.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the upper structure of the present invention;

FIG. 3 is a schematic view of the lower structure of the present invention.

Detailed Description

As shown in fig. 1-3, the bi-directional hydraulic resistance type drilling jar of the present invention comprises a drilling tool upper joint 1, an integrally extended driving mandrel pipe 2, a knocking hammer 3, a piston 4, and a sleeved driven knocking hammer outer cylinder 7; the lower end of the spline outer cylinder 6 at the upper part is connected with a knocking hammer outer cylinder 7 in a threaded manner, the lower end of the knocking hammer outer cylinder 7 is connected with a piston outer cylinder 8 in a threaded manner, and the lower end of the piston outer cylinder 8 is connected with a drilling tool lower joint 9 in a threaded manner.

The lower end of an upper connector 1 of a drilling tool extends to be integrally connected with a core shaft tube 2, the outer diameter of the core shaft tube 2 and the inner diameter of a spline outer tube 6 are sleeved and overlapped in a clearance fit mode, a gland 10 in a screw-thread fit mode and an inner disk root ring embedded in the gland 10 are arranged at the upper opening of the spline outer tube 6 to tightly seal the periphery of the core shaft tube 2 in a sealing mode so as to ensure that the spline outer tube 6 and the core shaft tube 2 do not rotate relatively and can transmit torque, a pressure transmission through hole 18 is arranged on the tube wall of the tail portion of the spline outer tube 6, the pressure transmission through hole 18 keeps the balance of the air pressure inside a tool and the air pressure of an inner well ring, the lower portion of the core shaft tube 2 continues to reduce in diameter and extend to sequentially penetrate through the reducing portion at the lower end of the spline outer tube 6, a knocking hammer outer tube 7, a piston outer tube 8 and a centering sleeve.

An upper knocking shoulder 13 and a lower knocking shoulder 14 are arranged at the connecting heads at two ends in the knocking hammer outer cylinder 7, a columnar knocking hammer 3 is fixed on the core shaft tube 2 in the annular space of the section, a slight gap is reserved between the outer diameter of the knocking hammer 3 and the inner wall of the knocking hammer outer cylinder 7 to allow the knocking hammer to move freely, the knocking hammer 3 runs upwards to knock against the upper knocking shoulder 13 and runs downwards to knock against the lower knocking shoulder 14 in the inner annular space of the knocking hammer outer cylinder 7, a first oil injection hole 19 is formed in the tube wall of the tail part of the knocking hammer outer cylinder 7, and the reduced diameter part at the lower end of the knocking hammer outer cylinder 7 is in close contact with the core shaft tube 2 to form metal seal; a piston 4 is fixed on a mandrel tube 2 in the section of the piston outer cylinder 8, the middle part of the inner wall of the piston outer cylinder 8 where the piston 4 is located is reduced in diameter, two ends are expanded in diameter, the periphery of the piston 4 is in clearance fit with the inner ring of the piston outer cylinder 8, a longitudinal oil guide through hole 17 is formed in the piston 4, the oil guide through hole 17 is extremely fine and allows hydraulic oil to pass through at extremely low flow, and a second oil injection hole 20 is formed in the tube wall at the tail part of the piston outer cylinder 8; the straight section at the tail end of the mandrel pipe 2 is in close contact with the inner wall of the righting sleeve 12 to form metal seal; the closed space formed by the knocking hammer 3 and the knocking hammer outer cylinder 7 and the closed space formed by the piston 4 and the piston outer cylinder 8 are filled with hydraulic oil, and the hydraulic oil is injected before the tool goes into the well through a first oil injection hole 19 and a second oil injection hole 20 respectively.

The mandrel pipe 2 is formed by special tool steel integrated turning and milling, so that the working stability is ensured while the tool strength is ensured.

The device comprises an active operation jarring structure consisting of a drilling tool upper joint 1, a mandrel pipe 2, a piston 4 and a knocking hammer 3; the passive operation jarring structure is formed by a spline outer cylinder 6 and a gland 10 thereof, a knocking hammer outer cylinder 7, a piston outer cylinder 8, a centralizing sleeve 12 and a drilling tool lower joint 9.

When the device is used, an upper drilling tool is connected with a female buckle on a drilling tool upper joint 1, a lower drilling tool is connected with a male buckle on a drilling tool lower joint 9, a spline outer cylinder 6, a knocking hammer outer cylinder 7, a piston outer cylinder 8, a righting sleeve 12 and a core shaft tube 2 are all in a hollow tubular shape, and during drilling, drilling fluid enters a tool from a liquid inlet of the drilling tool upper joint 1 and leaves the tool from a liquid outlet of the drilling tool lower joint 9.

When the impact is needed, the device is firstly positioned at the middle position, namely the piston 4 is positioned at the central position of the piston outer cylinder 8; when the upward impact is needed, the drilling tool is lifted, the drilling tool is connected with the core shaft tube 2, so that the piston 4 moves upwards along with the upward movement, hydraulic oil can only flow from the upper part to the lower part through the oil guide through holes 17, the upward movement of the core shaft tube 2 is blocked, the drilling tool at the upper part is in a stretching state, when the piston 4 moves upwards to the inner wall expanding position of the outer piston barrel 8, the channel of the hydraulic oil is suddenly opened, the upward movement resistance of the core shaft tube 2 disappears, under the tension action of the drilling tool at the upper part, the core shaft tube 2 rapidly moves upwards until the impact hammer 3 collides with the tail end reducing end surface of the outer spline barrel 6, namely the upper impact shoulder 13, the upward impact is generated, then the drilling tool is slowly pressed downwards to reset the piston 4, namely the drilling tool is positioned at the center position; when the drilling tool needs to be knocked down, the drilling tool is pressed down, the drilling tool is connected with the core shaft tube 2, the piston 4 moves down along with the drilling tool, hydraulic oil can only flow to the upper part from the lower part through the oil guide through hole 17, the core shaft tube 2 is blocked to move down, the drilling tool at the upper part is in a compression state, when the piston 4 moves down to the inner wall expanding position of the outer cylinder 8 of the piston, the channel of the hydraulic oil is suddenly opened, the resistance of the core shaft tube 2 moving down disappears, under the pressure action of the drilling tool at the upper part, the core shaft tube 2 moves down rapidly until the knocking hammer 3 collides with the tail end reducing end face of the outer cylinder 7 of the knocking hammer, namely the lower knocking shoulder 14, a down stroke is generated, then the drilling tool is lifted up slowly to reset the piston 4, even if the drilling.