CN108204208B - Tubing head reducing joint for pump detection operation of oil pumping well - Google Patents
Tubing head reducing joint for pump detection operation of oil pumping well Download PDFInfo
- Publication number
- CN108204208B CN108204208B CN201611171523.8A CN201611171523A CN108204208B CN 108204208 B CN108204208 B CN 108204208B CN 201611171523 A CN201611171523 A CN 201611171523A CN 108204208 B CN108204208 B CN 108204208B
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- hole
- pump
- tubing head
- oil
- head
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Abstract
The invention discloses a tubing head reducing joint for pump inspection operation of an oil pumping well, belonging to the field of oil exploitation. The oil pipe head reducing joint comprises: a body (1) having a hollow structure; a clamp head (2) which is connected with the upper end part of the body (1) and has a hollow structure; a flange (3) connected to the lower end of the body (1); a wax scraper (4) is connected in the inner cavity of the upper end part of the body (1), and the inner diameter of the wax scraper (4) is slightly larger than the outer diameter of the sucker rod string; a coil pipe (5) is connected in the inner cavity of the lower end part of the body (1); a nozzle (6) which is connected to the inner side (501) of the coil pipe in a penetrating manner; a first through hole (7) is formed in the lower end portion of the body (1), and the coil pipe (5) is in through connection with the lower end portion of the body (1) through the first through hole (7). The reducing joint of the oil pipe head provided by the invention can prevent crude oil from being scattered on the well site ground, thereby avoiding energy waste and environmental pollution and reducing the occurrence of safety accidents.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to a tubing head reducing joint for pump inspection operation of an oil pumping well.
Background
With the rapid development of socioeconomic performance, the demand for petroleum is also increasing. The pump inspection operation of the oil pumping machine well is a conventional maintenance operation in the oil extraction process, and the pump inspection operation of the oil pumping machine well needs to be carried out regularly because the condition that the wax deposition of the underground pump is serious and the piston pipe rod is broken and separated can occur in the oil extraction process.
Currently, the pump inspection method is to wash the well with a well-flushing fluid and then flush the sucker rod string. In particular, pump testing requires the use of specialized equipment to sequentially raise the rod string to the surface and to flush it with a boiler car before it is re-lowered into the well to remove wax and oil from the rod string.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
when the pump inspection operation of the pumping unit is carried out, crude oil is taken out of a shaft along with a pumping rod string, so that the crude oil falls to the ground, the natural environment is polluted, the fallen crude oil cannot be reused, and resources are wasted; constructors work in a wet and slippery oil-gas environment, the safety coefficient is low, and injury accidents such as slipping, falling off hands, steam scalding and the like are easy to occur; oil gas volatilizes in natural environment, has potential safety hazard problems such as ignition, explosion, etc.
Disclosure of Invention
In order to solve the problem that crude oil is brought out of a shaft along with a sucker rod string in the prior art, the embodiment of the invention provides a tubing head reducing joint for pump detection of a pumping unit well. The technical scheme is as follows:
provided is a tubing head reducing joint of a pump for oil pumping unit well inspection, comprising:
a body having a hollow structure;
the hoop head is connected with the upper end part of the body and has a hollow structure;
a flange connected to the lower end of the body;
the inner cavity of the upper end part of the body is connected with a wax scraper, and the inner diameter of the wax scraper is slightly larger than the outer diameter of the sucker rod string;
a coil pipe is connected in the inner cavity of the lower end part of the body;
the nozzle is communicated with the inner side of the coil pipe;
the lower end of the body is provided with a first through hole, and the coil pipe is communicated with the lower end of the body through the first through hole.
Preferably, a plurality of second through holes are provided along a radial direction of an upper end portion of the body;
and a spring is embedded in the second through hole and is in contact with the outer wall of the wax scraper in a compressed state.
Preferably, the upper end of the body is provided with a stepped hole, the aperture of the first part of the stepped hole is slightly larger than that of the second part of the stepped hole, and the aperture of the second part of the stepped hole is larger than that of the third part of the stepped hole.
Preferably, the tubing head reducer for oil pumping unit well pump inspection operation further comprises a flange with a hollow structure, and the flange is embedded in the first part of the stepped hole.
Preferably, the wax scraper is embedded in the second part of the stepped hole, and the wax scraper is made of hard wear-resistant rubber material in a crown shape.
Preferably, an annular groove is arranged on the inner side of the lower end part of the body, and the coil pipe is clamped in the annular groove;
the inner side of the lower end part of the body is connected with a plurality of bolts, and the upper surfaces of the bolts are in contact with the lower surface of the coil pipe;
the hollow structure of the body is in an inverted funnel shape.
Preferably, a third through hole is formed in the inner side of the coil pipe, and the nozzle is in threaded connection with the inner side of the coil pipe through the third through hole.
Preferably, the inner diameter of the upper end part of the clamp head is smaller than that of the lower end part of the clamp head, the upper surface of the upper end part of the clamp head is provided with a first steel ring groove, and the lower end part of the clamp head is provided with an internal thread;
the upper end of the body is provided with external threads, and the lower surface of the flange is provided with a second steel ring groove.
Preferably, the tubing head reducing joint for pump inspection operation of the oil pumping unit further comprises:
the liquid quick connector is connected with the lower end part of the body through the right end part of the first through hole;
the quick control valve is connected with the right end part of the liquid quick connector;
and the high-temperature high-pressure pipeline is connected with the quick control valve.
Preferably, the first through hole is provided with internal threads, one end of the coil pipe is in threaded connection with the lower end of the body through the left end of the first through hole, and the liquid quick connector is in threaded connection with the lower end of the body through the right end of the first through hole.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the coil pipe is communicated with the lower end part of the body and the nozzle is communicated with the coil pipe, so that high-pressure high-temperature steam enters the reducing joint of the oil pipe, and further the high-pressure high-temperature steam is sprayed to the surface of the upwards-pulled sucker rod string, and the surface of the sucker rod string is preliminarily sprayed and cleaned with wax; further, through set up the wax scraper at the upper end of body, strike off and directly wash and follow the crude oil that the sucker rod string went upward by high-pressure high temperature steam, realize wasing comprehensively and paraffin removal to the surface of sucker rod string, make crude oil fall into in the well along the surface of sucker rod string, avoided crude oil to spill on the well site is subaerial, had both avoided energy waste and environmental pollution like this, reduced the emergence of incident again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a tubing head reducer for pump testing operations in an oil well pump;
FIG. 2 is a schematic structural diagram of a body according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a Glan provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a wax scraper provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a top view of a tubing head reducer for pump testing operations in a direction A-A of an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a clamp according to an embodiment of the present invention.
Wherein the reference numerals in the drawings are explained as follows:
1, a body;
2, a clamp head, 201, an upper end part of the clamp head, 202, a lower end part of the clamp head, and 203, a first steel ring groove;
3, a flange 301 and a second steel ring groove;
4 wax scraper, 401 upper end of wax scraper, 402 lower end of wax scraper;
5 coils, 501 inside of coils;
6, a nozzle;
7 a first through hole;
8 a second through hole;
9, a spring;
10, 1001, 1002, 1003, or;
11, glan;
12 annular grooves;
13, bolts;
14 a third via hole;
15 liquid quick-connection;
16 a fast control valve;
17 high temperature high pressure pipeline.
Detailed Description
Before further detailed description of the embodiments of the present invention, it is to be noted that the tubing head reducer for pump inspection in the embodiments of the present invention is not a tubing head reducer frequently used by those skilled in the art, and the tubing head reducer in the prior art is a connecting component between a large cross joint and a main production valve in a production tree of an oil pumping well, and is made of cast steel material, and generally, according to different conditions such as pressure bearing (25 to 70MPa), use (water injection well, oil production well), functional requirements (land use, marine use), and the like of the production tree, the diameter is generally changed from 180 to 350mm to 65mm, and the height is generally 150 to 200mm, and only functions of connection conversion and suspension sealing.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a tubing head reducing joint for pump detection operation of an oil pumping well, as shown in figure 1, the tubing head reducing joint comprises: a body 1 having a hollow structure; a clamp head 2 having a hollow structure connected to an upper end of the body 1; a flange 3 connected to the lower end of the body 1;
further, a wax scraper 4 is connected in the inner cavity of the upper end part of the body 1, and the inner diameter of the wax scraper 4 is slightly larger than the outer diameter of the sucker rod string; a coil pipe 5 is connected in the inner cavity of the lower end part of the body 1; a nozzle 6 which is connected to the inner side 501 of the coil pipe; the lower end of the body 1 is provided with a first through hole 7, and the coil pipe 5 is communicated with the lower end of the body 1 through the first through hole 7.
When the oil pipe head reducing joint is used for carrying out pump detection operation on an oil pumping well, the clamp head 2 is connected with a main valve of a Christmas tree and the flange 3 is connected with a large four-way of the Christmas tree; then high-temperature high-pressure steam firstly enters the tubing head reducing joint through a first through hole 7 at the lower end part of the body 1, and then is sprayed out from a nozzle 6 at high pressure through a coil pipe 5, and is directly sprayed onto the surface of the sucker rod string which is being pulled upwards, so that crude oil carried on the sucker rod string is instantly melted by the high-temperature high-pressure steam, and the melted crude oil, wax and other substances flow into a well along the surface of the sucker rod string and the inner wall of the tubing head under the action of gravity; when the sucker rod ascends until entering the inside of the paraffin scraper 4, crude oil which is not directly sprayed by high-temperature high-pressure steam on the surface of the sucker rod string can be further scraped off by the paraffin scraper 4, and the scraped crude oil flows into the well along the surface of the sucker rod string and the inner wall of the tubing head, so that the sucker rod string is washed and paraffin-removed, and crude oil is prevented from scattering on the ground of a well site.
According to the embodiment of the invention, the coil pipe 5 is in through connection with the lower end part of the body 1, and the nozzle 6 is in through connection with the coil pipe 5, so that high-temperature high-pressure steam enters the reducing joint of the oil pipe, and further the high-temperature high-pressure steam is sprayed to the surface of the sucker rod string which is being lifted upwards, and the primary spray-washing and paraffin removal of the surface of the sucker rod string are realized; further, through set up wax scraper 4 at the upper end of body 1, strike off and directly spout and wash and follow the crude oil that the sucker rod string went upward by high temperature high pressure, realize wasing comprehensively and paraffin removal to the surface of sucker rod string, make crude oil fall into in the well along the surface of sucker rod string, avoided crude oil to spill on the well site is subaerial, had both avoided energy waste and environmental pollution like this, reduced the emergence of incident again.
The sucker rod string can swing left and right during the rising process, so that the sucker rod string excessively presses one side of the wax scraper 4, and the wax scraper 4 is abraded, therefore, as shown in fig. 1, a plurality of second through holes 8 are preferably arranged along the radial direction of the upper end part of the body 1 in the embodiment of the invention; further, a spring 9 is embedded in the second through hole 8, and the spring 9 is in contact with the outer wall of the wax scraper 4 in a compressed state. The spring 9 is embedded in the second through hole 8, and the spring 9 is in contact with the outer wall of the wax scraper 4 in a compressed state, so that radial thrust can be generated on the wax scraper 4, an oil pumping rod string is prevented from excessively extruding one side of the wax scraper 4, and the service life of the wax scraper 4 is prolonged; in addition, the wax scraper 4 can be in close contact with the sucker rod strings with different outer diameters, so that the removal rate of the wax scraper 4 to crude oil and wax on the surface of the sucker rod string is improved, high-temperature steam is prevented from flowing upwards, the utilization rate of thermal efficiency is improved, and safety accidents such as steam scald are avoided. The spring 9 can be a spring with a diameter of 3-5 mm, and the diameter of the spring 9 is not specifically limited in the embodiment of the invention.
In the embodiment of the present invention, the position of the second through hole 8 is not specifically limited, and the second through hole 8 is preferably provided at the upper end of the body 1 according to the specific situation of the sucker rod string: a plurality of second through holes 8 evenly distributed on the body 1 in the circumferential direction constitute one set, and a plurality of sets are provided in the axial direction of the upper end of the body 1. The second through hole 8 is arranged in such a way that the sucker rod string can be uniformly subjected to radial thrust generated by the spring 9.
In actual operation, if the lifting speed of sucker rod string is too fast or wax scraper 4 and sucker rod string laminating are too inseparable, the condition that wax scraper 4 rises along with the sucker rod string can appear to weaken wax scraper 4 and to the effect of scraping of the material such as crude oil, wax on sucker rod string surface, so the oil pipe head reducing joint of pump operation is examined to the beam-pumping unit well still including glan 11 that has hollow structure, and it is connected with the upper end of body 1, and the concrete connection mode is: as shown in fig. 2, a step hole 10 is first provided on the inner side of the upper end of the body 1, the aperture of a first part 1001 of the step hole is slightly larger than the aperture of a second part 1002 of the step hole, and the aperture of the second part 1002 of the step hole is larger than the aperture of a third part 1003 of the step hole; the glad 11 is then inserted into the first portion 1001 of the stepped bore and the wax scraper 4 is inserted into the second portion 1002 of the stepped bore. Therefore, it can be seen that the glan 11 is placed above the wax scraper 4, which not only limits the wax scraper 4, but also helps to seal the wax scraper 4, so as to prevent high-temperature and high-pressure steam from escaping from the gap between the upper end of the body 1 and the wax scraper 4. Wherein, the gram 11 is a hollow cylinder made of stainless steel material, and the structure thereof is shown in fig. 3.
Further, in order to prevent the high-temperature and high-pressure steam from escaping from the gap between the upper end of the body 1 and the wax scraper 4, the wax scraper 4 is formed in a crown shape, and as shown in fig. 4, the outer diameter of the upper end 401 of the wax scraper is larger than the outer diameter of the lower end 402 of the wax scraper, and the inner diameter of the upper end 401 of the wax scraper is the same as the inner diameter of the lower end 402 of the wax scraper. The embodiment of the invention does not specifically limit the size of the outer diameter of the upper end part 401 of the wax scraper and the outer diameter of the lower end part 402 of the wax scraper, and only needs to ensure that the outer wall of the upper end part 401 of the wax scraper is attached to the inner wall of the upper end part of the body 1 in a state that the wax scraper 4 is tightly attached to the sucker rod string. The wax scraper 4 is preferably made of hard wear-resistant rubber material, because the hard wear-resistant rubber material not only has long service life, but also avoids the abrasion to the surface of the sucker rod string.
In the above-mentioned embodiment, the coil 5 is connected to the inner side of the lower end of the body 1, so that the high-temperature and high-pressure steam sequentially passes through the body 1 and the coil 5 and enters the nozzle 6, wherein there are various ways of connecting the coil 5 to the inner side of the lower end of the body 1, for example, the coil 5 is connected to the inside of the body 1 by welding, but the welding is not favorable for replacing the coil 5, so the embodiment of the present invention adopts a bolt connection method for fixing, as shown in fig. 1, specifically: an annular groove 12 is arranged on the inner side of the lower end part of the body 1, and the coil pipe 5 is clamped in the annular groove 12; a plurality of bolts 13 are connected to the lower end of the body 1, and the upper surfaces of the bolts 13 are brought into contact with the lower surface of the coil 5. Through the connection mode, the coil pipe 5 can be fixed, and the coil pipe 5 is convenient to replace. Wherein, the shape of the coil 5 can be arranged into a circular ring structure to clamp the coil 5 into the annular groove 12; the material of the coil 5 may be stainless steel or brass, and the specific choice of which material is used in the embodiments of the present invention is not limited. Further, in order to more firmly fix the coil 5 into the annular groove 12, as shown in fig. 1, the hollow structure of the body 1 is shaped into an inverted funnel. The inner diameter of the lower end part of the body 1 is continuously reduced from bottom to top along the axial direction of the body 1, so that the coil pipe 5 cannot move upwards along the axial direction of the body 1; further, since the bolt 13 is provided below the coil 5, the coil 5 cannot move downward along the central axis direction of the main body 1.
The number of the annular grooves 12 provided at the lower end of the body 1 is not particularly limited in the embodiment of the present invention, and for example, a plurality of annular grooves 12 such as 1, 2, or 3 may be provided at the inner side of the lower end of the body 1 in the axial direction of the body 1. The coil pipes 5 clamped in each annular groove 12 can be connected in parallel or in series, and in order to reduce the time for installing the coil pipes 5, the invention adopts a parallel connection mode, namely, a plurality of first through holes 7 corresponding to each coil pipe 5 are arranged at the lower end part of the body 1, so that each coil pipe 5 is communicated with the body 1 through the corresponding first through holes 7, and thus, a plurality of steam pipes are prevented from being installed at the inner side of the lower end part of the body 1 and are connected with the adjacent coil pipes 5 in series.
After the coiled tubing 5 is firmly fixed, the nozzle 6 connected to the coiled tubing 5 can effectively spray the crude oil and wax from the sucker rod string, wherein the connection mode of the nozzle 6 and the coiled tubing 5 is various, and as shown in fig. 5, the connection mode adopted by the embodiment of the invention is as follows: a third through hole 14 is provided in the inner side 501 of the coil and the nozzle 6 is screwed to the inner side 501 of the coil through the third through hole 14. The nozzle 6 is connected with the inner side 501 of the coil pipe in a threaded connection mode, so that the nozzle 6 can be conveniently mounted and dismounted, and time and labor are saved. The number and the aperture size of the third through holes 14 are not specifically limited in the embodiment of the present invention, for example, 4 to 6 third through holes 14 (i.e., threaded holes) with an aperture of 0.5 to 3mm are uniformly arranged on the inner side 501 of the coil pipe in the embodiment of the present invention; likewise, the shape of the nozzle 6 is not limited in the embodiment of the present invention, and the internal shape of the nozzle 6 in the embodiment of the present invention is preferably set to be conical for the purpose of pressurization and emission reduction.
As shown in fig. 6, further, the inner diameter of the upper end portion 201 of the clip head is smaller than the inner diameter of the lower end portion 202 of the clip head, and the upper surface of the upper end portion 201 of the clip head has a first steel ring groove 203 and the lower end portion 202 of the clip head has an internal thread. By reducing the inner diameter of the upper end portion 201 of the clip head, the upper surface of the flange 11 can be prevented from being pushed out to the outside of the clip head 2, that is, the flange 11 can be restrained. The upper end part 201 of the clamp head is in clamp connection with the Christmas tree master control valve, and as the two steel bodies are connected, a first steel ring groove 203 is formed in the upper surface of the upper end part 201 of the clamp head, and then a steel ring is placed in the first steel ring groove 203 to achieve the effect of sealing connection; the lower end 202 of the clamp head is connected with the upper end of the body 1, and the embodiment of the invention adopts a threaded connection mode, specifically, the lower end 202 of the clamp head is provided with an internal thread.
As shown in fig. 1, an upper end of the body 1 is provided with an external thread, and a lower surface of the flange 3 is provided with a second steel ring groove 301. Specifically, an external thread is arranged at the upper end part of the body 1, so that the lower end part 202 of the clamp head is in connection threaded connection with the upper end part of the body 1; the body 1 is connected with the big four-way of the Christmas tree through the flange 3 by bolts, and two steel bodies are connected, so that a second steel ring groove 301 is formed in the lower surface of the flange 3, and then the steel ring is placed in the second steel ring groove 301 to achieve the effect of sealing connection.
In production operation, high-temperature and high-pressure steam is provided by a steam generator or a boiler car, and the high-pressure steam is conveyed into the oil pipe head reducing joint through a pipeline. Therefore, the tubing head reducing joint for pump detection operation of the oil pumping well further comprises: a liquid quick coupling 15 connected to the lower end of the body 1 through the right end of the first through hole 7; a quick control valve 16 connected to the right end of the liquid quick connector 15; a high temperature and high pressure line 17 connected to the quick control valve 16. The high-temperature high-pressure steam can be provided for the inside of the reducing joint of the oil pipe head by connecting the liquid quick joint 15 with the body 1 and connecting the high-temperature high-pressure pipeline 17 with a steam generator or a boiler car; in addition, by connecting the quick control valve 16 with the liquid quick connector 15, safe operation is facilitated.
The liquid quick connector 15 may be connected to the lower end of the body 1 through the right end of the first through hole 7 in various ways, and preferably, the first through hole 7 according to the embodiment of the present invention has an internal thread so that the liquid quick connector 15 is screwed to the lower end of the body 1 through the right end of the first through hole 7. Further, carry out the spiral shell mosquito with the left end of the one end of coil pipe 5 through first through-hole 7 and body 1 and be connected, wherein the concrete shape of coil pipe 5 can set up as: the coil pipe 5 has a bent portion and a non-bent portion, wherein an extension line of the non-bent portion passes through a center of the bent portion, and the non-bent portion has an external thread, and can be directly inserted into the first through hole 7 to be screw-coupled with the body 1. Mode through threaded connection is connected coil pipe 5 and liquid quick-operation joint 15 with body 1 respectively through first through-hole 7, can make high temperature high pressure steam flow into to coil pipe 5 in by liquid quick-operation joint 15, the installation and the dismantlement of coil pipe 5 and liquid quick-operation joint 15 of also being convenient for. It should be noted that the hydraulic quick connector 15, the quick valve 16, and the high-temperature and high-pressure pipeline 17 are high-temperature and high-pressure resistant components, and are universal standard components, which can achieve quick connection and quick control, so the embodiment of the present invention does not describe the three components in detail.
The use of the tubing head reducer will be described in detail below.
Step 1: and (6) assembling. The tubing head reducing joint needs to be assembled first. The nozzle 6 is connected with the coil pipe 5 in sequence, then is arranged in the annular groove 12 of the body 1, and is fixed in the annular groove 12 on the inner side of the body 1 by a bolt 13; one end of the coil pipe 5 is connected with the left end part of the first through hole 7, and the left end part of the first through hole 7 is connected with the hydraulic quick joint 15; the clamp head 2 is dismounted to take out the Glan 11, the wax scraper 4 is placed in the second part 1002 of the step hole at the upper end of the body 1, the Glan 11 is placed in the first part 1001 of the step hole, and then the clamp head 2 and the body 1 are connected; connecting a high-temperature high-pressure pipeline 17 with a quick control valve 16, and then connecting the high-temperature high-pressure pipeline 17 with a remote steam generator (or boiler car); and (3) closing the quick control valve 16, starting the boiler car to test the pressure, stopping the pump for 10min, and opening the quick control valve 16 to release the pressure for later use if the pressure is not reduced to be qualified.
Step 2: and (6) checking. Before the tubing head reducing joint is used, the condition of a wellhead Christmas tree to be constructed needs to be checked. The clamp head 2 can be connected with a Christmas tree main production valve in a clamp connection mode, a steel ring is used for sealing the Christmas tree main production valve, the clamp head 2 can bear the high pressure of 25PMa, and a sucker rod string can be guided to pass through a tubing head reducing joint for pump checking operation; the flange 3 is connected with the large four-way of the Christmas tree in a bolt connection mode, a steel ring is used for sealing the large four-way of the Christmas tree, and the flange 3 can bear the high pressure of 25PMa and guide the sucker rod string to enter a tubing head reducing joint for pump checking operation; the inner cavity of the body 1 is concentric and communicated with the big four-way of the Christmas tree of the original well and the general production valve of the Christmas tree, and can bear the high pressure of 25MPa and the high temperature of not less than 135 ℃.
And step 3: and (6) mounting. And installing the tubing head reducing joint on the large four-way joint of the Christmas tree. Firstly, disassembling a flange bolt on the large four-way of the Christmas tree, taking away the upper part of the Christmas tree, wiping the upper plane of the large four-way of the Christmas tree and a steel ring groove, and then putting a steel ring; then installing the tubing head reducing joint on the big four-way of the Christmas tree, and connecting and fastening the flange 3 and a flange on the big four-way of the Christmas tree by using a bolt; cleaning a steel ring groove at the upper end part of the clamp head 2, placing a qualified steel ring, and connecting and fastening the clamp head 2 and a Christmas tree general production valve (or a sucker rod blowout preventer) by using a clamp; and finally, the quick control valve 16 is in threaded connection with the other end of the hydraulic quick connector 15, a steam generator (or a boiler car) is started for preheating, and steam is boosted for later use.
And 4, step 4: and (6) paraffin removal. Starting to lift the sucker rod string, opening the quick control valve 16 to enable steam to enter the tubing head reducing joint for pump checking operation, and spraying the steam from the nozzle 6 through the coil pipe 5 to directly spray the steam onto the sucker rod string body which is lifted upwards; crude oil and wax which are not directly sprayed and run upwards along with the sucker rod string encounter the wax scraper 4, are scraped off by the oil scraping rubber of the wax scraper 4 and continuously flow into the well along the sucker rod body and the inner wall of the tubing head. Meanwhile, the melted crude oil flows into the well along the sucker rod body and the inner wall of the tubing head, so that the temperature in the well gradually rises, the time for cleaning and melting the crude oil at a well mouth is shortened, the pulling-out work of the sucker rod string is not influenced by the process method, and the underground operation work is normally carried out.
And 5: and (5) shutting down. When the piston pull rod is pulled to a wellhead, the paraffin removal operation is stopped, the steam generator (or a boiler car) is stopped, an output valve of the steam generator (or the boiler car) is closed, then a quick control valve 16 of the reducing joint of the oil pipe head is closed, and the steam generator (or the boiler car) is emptied. After the pressure is reduced to zero, a clamp connected between the clamp head 2 and a production valve (or a sucker rod blowout preventer) of the Christmas tree is removed, and a flange bolt connected between a flange 3 and a big four-way joint of the Christmas tree is removed; and finally, the reducing joint of the tubing head is disassembled, and the pull rod and the deep-well pump piston are pulled out.
Step 6: and (5) ending. After the reducing joint of the oil pipe head is used, all connecting accessories are disassembled, the screw threads of the nozzle 6, the coil pipe 5 and all connecting pieces are checked, and after the oil is completely determined, the oil is coated for protection and then the oil is recovered for standby.
And respectively carrying out pumping unit well pump detection operation on the well A and the well B according to the description of the using method of the tubing head reducing joint.
Wherein, the implementation condition of the well A is as follows: the well A is an oil pumping well with severe wax precipitation, the well depth is 2868m, a phi 38mm tubular pump is put in, the pump hanging depth is 2308 m, the rod column structure is 19mm (outer diameter) x 1308m (length) +22mm (outer diameter) x 1100m (length), the daily liquid yield is 22 tons, the water content is 22 percent, the wax content of crude oil is 18.9 percent, and the condensation point of the crude oil is 55 ℃. When a pump is detected in the prior art, a well is generally back-washed by using 30 parts of active water (1 part is 1 cubic meter), and the oil pipe does not return liquid; the thickness of wax deposition is generally 8-15 mm when the sucker rod string is pulled out for inspection, the volume of the carried crude oil is about 1.2 square, the crude oil and sewage are sprayed on a Christmas tree and a well site, the environment is seriously polluted, and operation workers still work in a wet and slippery oil-gas environment for a long time, so that safety accidents such as slipping, falling off the hands and the like easily occur; the wax on the sucker rod string is sprayed and washed on the ground by using a boiler car, the time of 27-30 hours is needed in winter, and a large amount of manpower and resources are consumed.
When the tubing head reducing joint provided by the embodiment of the invention is used for carrying out pumping unit pump detection operation on the well A, the pumping rod string is lifted and carried for 8 hours in the process, no pollutants such as crude oil, wax, sewage and the like are brought out of a well mouth, an oil production tree and the ground are clean and have no crude oil, and the environment and equipment have no pollution; no injury accidents occur; before the pump is put down, the pumping rod column is not sprayed and washed by a boiler car. The pumping-up speed of the pump is about 40 pumping-up rods per hour, which is equivalent to the normal pumping-up speed, but the time for spraying and washing the pumping-up rod column by a ground boiler car is saved by 24 hours, the service time of the boiler car is saved by about 19 hours, and the investment is saved by about 4000 yuan; the crude oil of 1.2 sides is prevented from being taken out of a wellhead to become the ground oil, the income is increased by 3000 yuan, the labor and other expenses are saved by 6000 yuan, and the direct economic benefit is at least 13000 yuan. The benefits of the safety and environmental protection aspects are not easy to estimate.
Wherein, the implementation condition of the well B is as follows: the well B is a pumping well with thick oil, the well depth is 3123m, a phi 44mm tubular pump is put in, the pump hanging depth is 1820 m, the rod column structure is 19mm multiplied by 900m +22mm multiplied by 920m, the daily liquid yield is 35 tons, and the water content is 18%. When a pump is detected before, 30 parts of active water is adopted for backwashing, liquid does not return from a well mouth, thick crude oil is adhered to a sucker rod string, the amount of the brought crude oil is about 0.7 part, and the crude oil is sprinkled over the well mouth and a well site, so that the environment is seriously polluted, and workers still work in a wet and slippery oil-gas environment for a long time, and safety accidents such as slipping, falling off and the like easily occur; the method is characterized in that a boiler car is used for spraying and washing wax and thick oil on a sucker rod string on the ground, the time is 8-15 hours, and a large amount of manpower and resources are consumed.
When the tubing head reducing joint provided by the embodiment of the invention is used for carrying out pump detection operation on a B well, the speed of lifting a sucker rod by a pump detection at this time is about 40 rods/hour and is slightly higher than the normal speed of lifting the sucker rod, meanwhile, the time of spraying and washing the sucker rod string by a ground boiler car is saved by about 15 hours, the service time of the boiler car is saved by about 10 hours, and the investment is saved by about 2200 yuan; the crude oil with the volume of 0.7 is prevented from being taken out of the wellhead to become the ground oil, the income is increased by about 2000 yuan, the labor and other expenses are saved by 4000 yuan, and the direct economic benefit is at least 8200 yuan. The benefits of the safety and environmental protection aspects are not easy to estimate.
By adopting the tubing head reducing joint provided by the embodiment of the invention to carry out pump inspection operation on the well A and the well B, the embodiment of the invention has better direct economic benefit, the single well can shorten the paraffin removal time by more than 10 hours, the crude oil waste of more than 0.7 square per well is avoided, and the direct economic benefit of the single well is 8200-13000 yuan.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A tubing head reducer for pump testing operations in an oil well, the tubing head reducer comprising:
a body (1) having a hollow structure;
a clamp head (2) which is connected with the upper end part of the body (1) and has a hollow structure;
a flange (3) connected to the lower end of the body (1);
it is characterized in that the preparation method is characterized in that,
a wax scraper (4) is connected in the inner cavity of the upper end part of the body (1), and the inner diameter of the wax scraper (4) is slightly larger than the outer diameter of the sucker rod string;
a coil pipe (5) is connected in the inner cavity of the lower end part of the body (1);
a nozzle (6) which is connected to the inner side (501) of the coil pipe in a penetrating manner;
a first through hole (7) is formed in the lower end of the body (1), and the coil pipe (5) is communicated with the lower end of the body (1) through the first through hole (7);
a step hole (10) is formed in the upper end of the body (1), the aperture of a first part (1001) of the step hole is slightly larger than that of a second part (1002) of the step hole, and the aperture of the second part (1002) of the step hole is larger than that of a third part (1003) of the step hole;
the tubing head reducing joint for the oil pumping well pump inspection operation further comprises a flange (11) with a hollow structure, and the flange (11) is embedded in the first part (1001) of the stepped hole.
2. Tubing head reducer for oil-well pump-testing operations according to claim 1, characterized in that a plurality of second through holes (8) are provided radially along the upper end of the body (1);
a spring (9) is embedded in the second through hole (8), and the spring (9) is in contact with the outer wall of the wax scraper (4) in a compressed state.
3. Tubing head reducer for rod-pumped well pump-testing operations according to claim 1, characterized in that said wax scraper (4) is embedded in said second portion (1002) of said stepped bore, and said wax scraper (4) is a hard wear-resistant rubber material in the form of a crown.
4. The tubing head reducer for pump inspection work of an oil pumping well according to claim 1, characterized in that an annular groove (12) is provided inside the lower end of the body (1), and the coiled tube (5) is clamped in the annular groove (12);
a plurality of bolts (13) are connected to the inner side of the lower end part of the body (1), and the upper surfaces of the bolts (13) are in contact with the lower surface of the coil pipe (5);
the hollow structure of the body (1) is in an inverted funnel shape.
5. Tubing head reducer for pump-rod-pumped well-pump-testing operation according to claim 1, characterized in that a third through-hole (14) is provided in the inner side (501) of the coiled tubing, and the nozzle (6) is screwed to the inner side (501) of the coiled tubing through the third through-hole (14).
6. The tubing head reducer joint for pump-checking operation of an oil pumping well according to claim 1, wherein the inner diameter of the upper end portion (201) of the collar head is smaller than the inner diameter of the lower end portion (202) of the collar head, and the upper surface of the upper end portion (201) of the collar head has a first steel ring groove (203), and the lower end portion (202) of the collar head has an internal thread;
the upper end of the body (1) is provided with an external thread, and the lower surface of the flange (3) is provided with a second steel ring groove (301).
7. The tubing head sub of claim 6, further comprising:
a liquid quick joint (15) connected with the lower end part of the body (1) through the right end part of the first through hole (7);
a quick control valve (16) connected with the right end part of the liquid quick connector (15);
and a high-temperature high-pressure pipeline (17) connected with the rapid control valve (16).
8. The tubing head reducer joint for pump-checking operation of oil pumping unit well according to claim 7, wherein the first through hole (7) is internally threaded, and one end of the coiled tube (5) is in threaded connection with the lower end of the body (1) through the left end of the first through hole (7), and the liquid quick joint (15) is in threaded connection with the lower end of the body (1) through the right end of the first through hole (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611171523.8A CN108204208B (en) | 2016-12-17 | 2016-12-17 | Tubing head reducing joint for pump detection operation of oil pumping well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611171523.8A CN108204208B (en) | 2016-12-17 | 2016-12-17 | Tubing head reducing joint for pump detection operation of oil pumping well |
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| CN108204208A CN108204208A (en) | 2018-06-26 |
| CN108204208B true CN108204208B (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611171523.8A Active CN108204208B (en) | 2016-12-17 | 2016-12-17 | Tubing head reducing joint for pump detection operation of oil pumping well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111395996A (en) * | 2020-05-06 | 2020-07-10 | 中国石油天然气集团有限公司 | Gas-water dual-purpose oil-gas well drill rod mud scraper device and using method thereof |
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| CN2054824U (en) * | 1989-09-09 | 1990-03-21 | 周世贤 | Oil scraping sparging-proof device of sucker rod |
| CN2697313Y (en) * | 2004-04-24 | 2005-05-04 | 林本立 | Wax and oil scraper for borehole pipe |
| CN202810794U (en) * | 2012-10-09 | 2013-03-20 | 王凤玉 | Graded type reducing sucker rod sucker pipe wax scraper |
| CN203114248U (en) * | 2013-04-01 | 2013-08-07 | 王帅伟 | Safe and environment-friendly wellhead paraffin removing and recycling apparatus |
| CN205370511U (en) * | 2016-01-20 | 2016-07-06 | 胡国龙 | Sucker rod anticreep paraffin removal device |
| CN205532493U (en) * | 2016-04-20 | 2016-08-31 | 扬州睿德石油机械有限公司 | Sucker rod wax scraping device |
| CN206376757U (en) * | 2016-12-17 | 2017-08-04 | 中国石油天然气股份有限公司 | The tubing head reducing joint of rod-pumped well pump detection and workover |
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2016
- 2016-12-17 CN CN201611171523.8A patent/CN108204208B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054824U (en) * | 1989-09-09 | 1990-03-21 | 周世贤 | Oil scraping sparging-proof device of sucker rod |
| CN2697313Y (en) * | 2004-04-24 | 2005-05-04 | 林本立 | Wax and oil scraper for borehole pipe |
| CN202810794U (en) * | 2012-10-09 | 2013-03-20 | 王凤玉 | Graded type reducing sucker rod sucker pipe wax scraper |
| CN203114248U (en) * | 2013-04-01 | 2013-08-07 | 王帅伟 | Safe and environment-friendly wellhead paraffin removing and recycling apparatus |
| CN205370511U (en) * | 2016-01-20 | 2016-07-06 | 胡国龙 | Sucker rod anticreep paraffin removal device |
| CN205532493U (en) * | 2016-04-20 | 2016-08-31 | 扬州睿德石油机械有限公司 | Sucker rod wax scraping device |
| CN206376757U (en) * | 2016-12-17 | 2017-08-04 | 中国石油天然气股份有限公司 | The tubing head reducing joint of rod-pumped well pump detection and workover |
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| CN108204208A (en) | 2018-06-26 |
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