CN212406645U

CN212406645U - Wellhead packing installation device

Info

Publication number: CN212406645U
Application number: CN202020520401.0U
Authority: CN
Inventors: 秦华; 秦泽菲
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-01-26
Anticipated expiration: 2030-04-10

Abstract

The utility model relates to a wellhead packing installation device, which comprises a gland, a polished rod perforation, a press ring and an internal thread which are sequentially distributed on the gland from top to bottom, wherein the press ring is fixedly arranged in the gland; the side wall of the gland is provided with a packing perforation; the outer side wall of the gland is fixedly provided with a plurality of shift levers, the shift levers and the gland form a steering wheel structure which can rotate around an axis, the steering wheel structure is connected with a transmission piece which is in abutting fit with the shift levers, the transmission piece is hinged with a push rod, the push rod is also connected with a pushing oil cylinder, and the two sides of the transmission piece respectively abut against and are stopped on the push rod and the shift lever which is positioned in front of the two adjacent shift levers when the pushing oil cylinder extends out, and the transmission piece is turned over on the push rod to movably overlap the shift lever which is positioned in back of the two adjacent shift; the pushing oil cylinder is connected with a control oil way for controlling the reciprocating expansion of the piston. Need not to rely on the manpower to accomplish the packing and change, labour saving and time saving.

Description

Wellhead packing installation device

Technical Field

The utility model belongs to oil recovery well head equipment field especially designs a well head packing installation device.

Background

At present, the effect of beam-pumping unit polished rod sealing is: the polish rod is sealed in a locking way by pressing the wear-resistant disk root, so that pressurized oil, gas and water in the oil well are prevented from overflowing out of a well head along with the reciprocating motion of the polish rod. Because the polished rod is in the rigidity oppression state all the time, when the motion of packing breaks away from the oil well axis, will form the hole of not uniform size between packing and sucker rod, and along with the continuous expansion in these holes, the hole link up the inside and outside condition of well head appears very easily, leads to the fluid that the plunger lifted to flow out from this hole, appears the oil leak problem, and serious person can lead to the blowout to take place, causes very big potential safety hazard to well head staff. In the face of the problem that the polished rod seal of the pumping unit is frequently seriously abraded, the packing used for the polished rod seal is frequently replaced in a manual mode, so that the problems that the labor intensity of well head workers is high and the packing is not replaced timely are caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a well head packing installation device to solve the problem that well head packing installation among the prior art is changed and is wasted time and energy, intensity of labour is big.

In order to solve the problem, the utility model relates to a well head packing installation device adopts following technical scheme:

the wellhead packing mounting device comprises a gland which is used for rotating and sleeved on a wellhead position of a shaft, a polished rod perforation, a pressure ring and an internal thread which are sequentially distributed on the gland from top to bottom, the polished rod perforation is positioned at the center of the top of the gland, the pressure ring is fixedly arranged in the gland, the diameter of an inner hole is equal to that of the polished rod perforation, and the end surface of a lower ring of the pressure ring is a spiral surface of one circle; the side wall of the gland is provided with a packing perforation positioned at the thinnest part of the pressure ring; the outer side wall of the gland is fixedly provided with a plurality of shifting rods which are uniformly distributed in the circumferential direction, the shifting rods and the gland form a steering wheel structure which can rotate around an axis, the steering wheel structure is connected with a transmission piece which is in abutting fit with the shifting rods, the transmission piece is hinged with a push rod which is arranged above or below the shifting rods in a staggered mode, the push rod is also coaxially connected with a pushing oil cylinder which is positioned at one end far away from the push rod, and the two sides of the transmission piece are respectively abutted and stopped on the push rod and the shifting rod which is in front of the push rod and two adjacent shifting rods when the pushing oil cylinder extends out, and the push rod is turned over and movably lapped on; the pushing oil cylinder is connected with a control oil way for controlling the reciprocating expansion of the piston.

Furthermore, the pushing oil cylinder is a one-way acting working cylinder, the control oil path comprises an oil inlet one-way valve and a plunger pump which are sequentially connected with an oil inlet of the rodless cavity, and the plunger pump is provided with a driving structure which is connected to the polished rod in a propping manner and pumps oil to the pushing oil cylinder when the polished rod descends; defining a point A close to one end of the piston rod extending out and a point B close to the other end on the side wall of the pushing oil cylinder; the oil outlet of the rodless cavity is connected with a first stroke controller, a manually controllable high-voltage control switch and a second stroke controller which are connected in parallel, the first stroke controller and the second stroke controller are respectively provided with an opening control end for controlling the conduction of the first stroke controller and a closing control end for controlling the closing of the first stroke controller, the opening control end of the first stroke controller is connected with a point A, the closing control end of the first stroke controller is connected with a point B, the opening control end of the second stroke controller is connected with the output end of the manually controllable high-voltage control switch, the closing control end of the second stroke controller is connected with a point A, and the oil outlet of the first stroke controller and the oil outlet of the second stroke controller are connected with an.

Further, well head packing installation device still includes the extrusion ring of placing in the annular space between pit shaft and the polished rod, and the extrusion ring has domatic upwards.

The utility model has the advantages as follows: the top pushes away hydro-cylinder simulation rudder hand and rotates the steering wheel structure, and the steering wheel structure utilizes the clamping ring to impress the packing of filling in the gland between pit shaft and the polished rod, realizes adding the packing in the automatic well head, need not to rely on the manpower to accomplish the packing and change labour saving and time saving.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described as follows:

fig. 1 is a schematic structural diagram of an actuator according to an embodiment of the wellhead packing mounting device of the present invention;

FIG. 2 is a schematic view of a control system of the wellhead packing installation;

FIG. 3 is a schematic view of the pressure ring of FIG. 1;

fig. 4 is a first state diagram of the control system driving the executing structure to act in the wellhead packing mounting device of the present invention;

fig. 5 is a second state diagram of the control system driving the executing structure to act in the wellhead packing mounting device of the present invention;

fig. 6 is a third state diagram of the control system driving the executing structure to act in the wellhead packing mounting device of the present invention;

fig. 7 is a fourth state diagram of the control system driving the executing structure to act in the wellhead packing mounting device of the present invention;

description of reference numerals: 1-pressing a cover; 2-a wellbore; 3, pressing a ring; 4-perforating a packing; 5-a deflector rod; 6-a bearing; 7-pushing oil cylinder; 8-pumping check valve; 9-a plunger pump; 10-pumping check valve; 11-a filter; 12-an oil inlet tank; 13-a first stroke controller; 14-a second stroke controller; 15-an oil drain valve; 16-an oil return tank; 17-a manually controllable high-voltage control switch; an 18-oil ring; 19-a polish rod; 20-an extrusion ring; 21-a support ring; 22-a transmission member; 23-a push rod; a-a deflector rod A; b-a deflector rod B.

Detailed Description

In order to make the technical purpose, technical solution and advantageous effects of the present invention clearer, the technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

The utility model relates to a wellhead packing installation device's embodiment, as shown in fig. 1 to 7, wellhead packing installation device mainly comprises actuating mechanism and control system two parts. The control system provides a power source to the actuator which is responsible for automatically installing the softer durometer packing into the annulus between the polish rod 19 and the wellbore 2.

As shown in fig. 1 and 3, the schematic structural diagram of the actuating mechanism of the wellhead packing installation device is installed at a wellhead position of a wellbore 2, and includes a gland 1 for rotating and being sleeved on the wellhead position of the wellbore 2, the gland 1 is provided with a polish rod perforation, a press ring 3 and internal threads which are sequentially distributed from top to bottom, wherein the polish rod perforation is located at a top center position of the gland 1, a polish rod 19 is inserted into the polish rod perforation, the press ring 3 is fixedly arranged in the gland 1 and has an equal diameter with the polish rod perforation, as shown in fig. 3, a lower ring end face of the press ring 3 is a spiral face of one turn; a packing perforation 4 positioned at the thinnest part of the compression ring 3 is arranged on the side wall of the gland 1; six deflector rods 5 which are uniformly distributed in the circumferential direction are fixedly arranged on the outer wall of the gland 1, and the deflector rods 5 and the gland 1 form a steering wheel structure which can rotate around an axis; the above-mentioned packing through-hole 4 extends tangentially along the inner bore of the gland 1. The gland 1 is rotatably connected with the shaft 2 through a bearing 6, the bearing 6 is positioned below the turning edge of the shaft 2, and a stopping step positioned on the inner wall of the gland 1 is arranged above the turning edge.

Specifically, for the flange, in this embodiment, the shaft 2 includes an oil pipe and an oil ring 18 fixedly sleeved on the upper end of the oil pipe, the oil ring 18 forms the flange of the shaft 2, and a support ring 21 is further fixed inside the lower end of the gland 1, the support ring 21 has an external thread for being in threaded connection with the internal thread of the gland 1, so as to clamp a bearing between the oil ring 18 and the support ring 21, thereby ensuring the rotating assembly between the gland 1 and the shaft 2 and avoiding the problem that the gland 1 and the shaft 2 are disengaged in the up-down direction.

Meanwhile, in order to guide the packing pressed into the annular space between the shaft 2 and the polished rod 19, a pressing ring 20 is arranged in the annular space between the shaft 2 and the polished rod 19, and the pressing ring 20 is provided with an upward slope.

As shown in fig. 4 to 7, corresponding to the control system of the above-mentioned actuator, the control system is connected to a push rod 23 disposed above the shift lever 5 in a staggered manner, one end of the push rod 23 is connected to a transmission member 22 in abutting engagement with the shift lever 5, the other end of the push rod 23 is connected to the ejection cylinder 7 of the control system, the transmission member 22 is in a rod-like structure, and one end of the transmission member is in a cam structure, and the cam structure is rotatably disposed at the corresponding end of the transmission member 22 and can swing and turn up. The other end of the transmission member 22 extends downward due to its own weight and extends below the plane where the shift lever 5 is located, and meanwhile, the transmission member 22 is hinged to the push rod 23 through a cam structure, and when the transmission member 22 is in a vertically downward state, the transmission member 22 and the push rod 23 are at a limit position, that is, the transmission member 22 does not swing to the push rod 23 continuously.

For two adjacent shift levers 5, a shift lever a is defined in front, and a shift lever B is defined in back, during actual operation, when the pushing cylinder 7 extends, the transmission member 22 abuts against and is stopped on the shift lever a and the push rod 23 respectively at two sides, and pushes the shift lever a to swing around the axis of the gland 1, when a set angle is reached, the pushing cylinder 7 retracts, and when the push rod 23 retracts, due to the hinge joint of the transmission member 22 and the push rod 23, when the transmission member 22 passes through the shift lever B, the upper end of the transmission member 22 swings around the push rod 23, the lower end of the transmission member 22 is turned up and movably lapped on the shift lever B due to the blocking of the shift lever B, and finally the transmission member is moved out of the shift lever B and is placed on the back side of the shift lever B due to. The pushing oil cylinder 7 is connected with a control oil path for controlling the reciprocating expansion of the piston. The pushing oil cylinder 7 is a one-way acting working cylinder.

As shown in fig. 2, the control oil path includes a pumping check valve 8, a plunger pump 9, a pumping check valve 10, a filter 11 and an oil inlet tank 12 which are sequentially connected to an oil inlet of the rodless cavity, and the plunger pump 9 is provided with a driving structure for being connected to the polish rod 19 in a propping manner and pumping oil to the propping oil cylinder 7 when the polish rod 19 descends. The side wall of the pushing oil cylinder is provided with a point A close to one end of the piston rod extending out and a point B close to the other end. The oil outlet of the rodless cavity is connected with a first stroke controller 13, a manual controllable high-voltage control switch 17 and a second stroke controller 14 which are connected in parallel, wherein the manual controllable high-voltage control switch 17 is mainly used for guaranteeing the maximum thrust of the push rod, namely guaranteeing the tightest degree of the packing after being compressed finally, and the hydraulic pressure is manually adjusted so as to adjust the pressure of the whole oil way. The first stroke controller 13 and the second stroke controller 14 are two-position two-way reversing valves. The first stroke controller 13 and the second stroke controller 14 each have an on control end for controlling the conduction thereof and an off control end for controlling the closing thereof, the on control end of the first stroke controller 13 is connected to a point a, the off control end is connected to a point B, and the on control end of the second stroke controller 14 is connected to the output end of the manually controllable high voltage control switch 17, and the off control end is connected to a point a. The branch of the second stroke controller 14 is also connected with an oil drain valve 15 positioned at the downstream of the second stroke controller, and the oil drain valve 15 is also a manually-controlled high-pressure control switch and mainly used for adjusting the minimum power for pushing the packing to start to operate. The drain valve 15 and the outlet of the first stroke controller 13 converge and are connected to a return tank 16.

The specific working process of the device is as follows: before a worker installs the packing into the shaft 2, the gland 1 is separated from the shaft 2, the bearing 6 and the support ring 21 are firstly sleeved on the outer side of the shaft 2 from bottom to top, then after the shaft 2 is installed, the extrusion ring 20 is sleeved on the outer side of the polished rod, then the compression ring 3 is fixed inside the gland 1, the worker penetrates one end of the packing into the gland 1 from the outer side of the gland 1 through the packing through hole 4, then the worker winds the packing on the polished rod 19 for several circles, fixes the packing on the polished rod, then sleeves the gland 1 on the outer side of the shaft 2 from top to bottom, after a stopping step of the gland 1 is attached to a turned edge of the shaft 2, the support ring 21 is upwards screwed from the lower side and matched with an internal thread of the gland, finally, the gland 1 and the shaft 2 are prevented from top to bottom and are assembled in a rotating mode, and. Then the control oil circuit begins work, drive push rod 23 and stretch out, the in-process that push rod 23 stretches out, driving medium 22 is because spacing and becomes fixed angle with push rod 23, and the lower extreme top of driving medium 22 pushes away driving lever 5 and around the circumference swing of gland 1, driving lever 5 swings and then drives gland 1 and rotate, gland 1 pivoted in-process, because the setting of clamping ring 3, the packing can be attached to the lower extreme helicoid removal of clamping ring 3, and continue downward action, and in gland 1 pivoted in-process, bring the packing into in the annular space gradually, finally establish packing whole body pressure in the annular space.

In the embodiment, the packing of the device does not need to be replaced frequently, and the sealing in the annular space is ensured after the packing with a certain length is led into the annular space. After polished rod 19 long-time up-and-down motion and wearing and tearing packing to certain degree, packing wearing and tearing lead to the space to have certain gap, under the effect of the minimum thrust of oil pressure of control circuit, can continue to promote push rod 23 and move forward, and then continue to promote the swing of driving lever 5, gland 1 rotates, can be with the interpolation of packing continuation to the annular space in.

Due to the arrangement of the extrusion ring 20, the worn packing can be continuously extruded and worn, the size of the worn packing is reduced, even the worn packing is worn, the service life is prolonged, and a new packing is continuously added.

That is to say, adopt this device not only can guarantee the compactness of the first packing of packing, can also realize receiving the wearing and tearing back at the packing, can the continuation add new packing to the annular space to guarantee that leakproofness and whole work in the annular space are smooth and easy.

It should be noted that each packing generally has 1-2m, and when adding a new packing, if the length of the previous packing is not enough, the manual work can be directly connected with another packing at the tail part of the previous packing, and the device only needs a worker to perform initial packing loading work and subsequent inspection work. And more manpower is not required.

Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating but not limiting the technical solution of the present invention, and any equivalent replacement and modification or partial replacement which do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. The wellhead packing mounting device is characterized by comprising a gland which is used for rotating and sleeved on a wellhead position of a shaft, a polish rod perforation, a pressure ring and an internal thread are sequentially distributed on the gland from top to bottom, the polish rod perforation is positioned at the center of the top of the gland, the pressure ring is fixedly arranged in the gland, the inner hole and the polish rod perforation have the same diameter, and the lower ring end surface of the pressure ring is a spiral surface with one turn; the side wall of the gland is provided with a packing perforation positioned at the thinnest part of the pressure ring; the outer side wall of the gland is fixedly provided with a plurality of shifting rods which are uniformly distributed in the circumferential direction, the shifting rods and the gland form a steering wheel structure which can rotate around an axis, the steering wheel structure is connected with a transmission piece which is in abutting fit with the shifting rods, the transmission piece is hinged with a push rod which is arranged above or below the shifting rods in a staggered mode, the push rod is also coaxially connected with a pushing oil cylinder which is positioned at one end far away from the push rod, and the two sides of the transmission piece are respectively abutted and stopped on the push rod and the shifting rod which is in front of the push rod and two adjacent shifting rods when the pushing oil cylinder extends out, and the push rod is turned over and movably lapped on; the pushing oil cylinder is connected with a control oil way for controlling the reciprocating expansion of the piston.

2. The wellhead packing installation device according to claim 1, further comprising a squeeze ring disposed in an annulus between the wellbore and the polish rod, the squeeze ring having an upwardly facing ramp surface.