Three-section type underwater cable passing mechanism for underground electric submersible pump
阅读说明:本技术 三段式井下电潜泵水下电缆穿越机构 (Three-section type underwater cable passing mechanism for underground electric submersible pump ) 是由 张鹏举 涂林枫 于 2019-11-26 设计创作,主要内容包括:本发明涉及一种三段式井下电潜泵水下电缆穿越机构,三段式井下电潜泵电缆穿越机构的触点数量至少为三芯,包括:底部湿式插头,底部湿式插头固定在水下采油设备上;穿越电缆,穿越电缆包括下部湿式插座和上部湿式插头,下部湿式插座的尾部与上部湿式插头的尾部通过软管密封连接,软管内充满绝缘油,下部湿式插座与底部湿式插头密封连接;ROV操作湿式插座,ROV操作湿式插座与上部湿式插头密封连接。(The invention relates to a three-section underground electric submersible pump underwater cable traversing mechanism, the number of contacts of the three-section underground electric submersible pump cable traversing mechanism is at least three cores, and the three-section underground electric submersible pump underwater cable traversing mechanism comprises: the bottom wet plug is fixed on the underwater oil extraction equipment; the through cable comprises a lower wet socket and an upper wet plug, the tail of the lower wet socket is hermetically connected with the tail of the upper wet plug through a hose, the hose is filled with insulating oil, and the lower wet socket is hermetically connected with the bottom wet plug; an ROV-operated wet socket sealingly connected with the upper wet plug.)
1. The utility model provides a syllogic downhole electrical submersible pump cable crossing mechanism under water which characterized in that, the contact quantity of syllogic downhole electrical submersible pump cable crossing mechanism is three cores at least, includes:
the bottom wet plug is fixedly arranged on the underwater oil extraction equipment and is connected with the electric submersible pump through an armored cable;
the through cable comprises a lower wet socket and an upper wet plug, the tail of the lower wet socket is hermetically connected with the tail of the upper wet plug through a hose, the hose is filled with insulating oil, and the lower wet socket is hermetically connected with the bottom wet plug;
an ROV-operated wet socket sealingly connected with the upper wet plug.
2. The underwater cable traversing mechanism of the three-section type downhole electric submersible pump according to claim 1, wherein the bottom wet plug comprises an outer sleeve with a water-proof membrane covered on the inner wall and a bottom wet plug body abutting against one end of the outer sleeve, the bottom wet plug body is in threaded connection with the underwater oil production equipment through a guide mechanism, the bottom wet plug body is in sealed connection with the guide mechanism, a bottom pin in sealed fit is axially inserted in the center of the bottom wet plug body, and one end of the bottom pin inserted in the bottom wet plug body is connected with the armored cable;
the bottom wet plug further comprises a cable fixing frame arranged in the waterproof film, one end of the cable fixing frame is buckled on the bottom wet plug body, and the other end of the cable fixing frame is buckled on a cable protection device used for isolating armored cables.
3. The underwater cable traversing mechanism of the three-section type underground electric submersible pump according to claim 2, wherein the cable protection device comprises a cable locking cavity and a cable clamping body, the cable locking cavity is sleeved outside an armored cable and is sleeved with the outer sleeve, and a cable gland is sleeved at the inner side end of the cable locking cavity, which enters the outer sleeve; the outer side end of the cable locking cavity, which is exposed out of the outer sleeve, is in threaded connection with one end of the cable clamping body, and a cable clamping ring is clamped at the outer side end of the cable locking cavity.
4. The underwater cable traversing mechanism of the three-section type underground electric submersible pump according to claim 3, wherein an armored cable snap ring is clamped on the inner side of the other end of the cable clamping body, a clamping body locking nut is screwed on the cable clamping body in a radial direction in a penetrating manner, and the clamping body locking nut is abutted to the armored cable snap ring after penetrating through the cable clamping body.
5. The mechanism of claim 2, wherein the lower wet socket comprises a lower socket body, an outer water-separating sleeve and an inner water-separating sleeve which are coaxially arranged are arranged in the lower socket body, and blocking pieces are arranged at two ends of the outer water-separating sleeve; a second pressure balance cavity filled with insulating oil is formed among the external water-separating sleeve, the blocking pieces at two ends and the internal water-separating sleeve, one end of the internal water-separating sleeve is hermetically connected with the blocking piece far away from the rear end of the lower socket body, a lower thimble axially penetrates through the blocking piece at the front end of the external water-separating sleeve, the lower thimble penetrates through the blocking piece at the front end into the internal water-separating sleeve, the lower thimble is respectively connected with the blocking piece and the internal water-separating sleeve in a sliding and sealing manner, a conductive element assembled with the lower thimble in a sliding manner is arranged in the internal water-separating sleeve, the lower thimble is pushed into the conductive element after the bottom contact pin is abutted against the lower thimble, and the other end of the conductive element passes through the internal water-separating sleeve and then is connected with the armored cable; the tail part of the lower socket body is hermetically connected with a lower hose fixing support used for fixing a hose.
6. The underwater cable crossing mechanism of the three-section type downhole electric submersible pump according to claim 5, wherein the lower hose fixing support is hermetically connected with the tail of the lower socket body through a sealing sleeve, the hose fixing support comprises a hose connector, one end of the hose connector is hermetically connected with the sealing sleeve, the hose is sleeved outside the hose connector, a cable locking sleeve is arranged outside the portion, connected with the hose connector, of the hose, the cable locking sleeve is connected with the hose connector through a locking ring, and the locking ring is in threaded connection with the hose connector.
7. The underwater cable traversing mechanism for the three-section type underground electric submersible pump according to claim 1 or 5, wherein the upper wet plug comprises an upper plug body, one end of the upper plug body, which is far away from the lower wet socket, is inserted with an upper contact pin, the upper contact pin is hermetically connected with the upper plug body, and the other end of the upper plug body is hermetically connected with an upper hose fixing frame.
8. The underwater cable traversing mechanism for the three-section type underground electric submersible pump according to claim 7, wherein the upper plug body is hermetically connected with the upper hose fixing frame through an upper sealing sleeve, the upper hose fixing frame comprises an upper hose joint, the hose is sleeved outside the upper hose joint, an upper cable locking sleeve is covered on the periphery of the part of the hose connected with the hose joint, and an upper locking ring is sleeved on the periphery of the position where the upper cable locking sleeve is connected with the upper hose joint.
9. The underwater cable traversing mechanism of the three-section type downhole electric submersible pump according to claim 1, wherein the ROV operation wet socket comprises a front shell adjacent to the upper wet plug and a tail shell screwed with the front shell, an ROV socket body is arranged in the front shell, an ROV external water-proof sleeve and an ROV internal water-proof sleeve which are coaxially arranged are arranged in the ROV socket body, a sealing element is arranged on the ROV external water-proof sleeve close to the front end of the upper wet plug, an ROV thimble assembled with the upper thimble is arranged in the ROV internal water-proof sleeve in a sliding and penetrating manner, one end of the ROV thimble penetrates through the sealing element to assemble the upper thimble, and the other end of the ROV thimble is connected with the ROV conductive element;
an ROV operating handle is arranged on the tail shell, and an armored cable is connected with the ROV conductive element through the tail shell.
10. The mechanism of claim 9, wherein the ROV conductive element comprises an ROV plug conductive rod, the ROV plug conductive rod is slidably connected to the ROV thimble, and an ROV conductive rod sealing sleeve is sealed outside the ROV plug conductive rod; an ROV spring is arranged in the ROV plug conducting rod.
Technical Field
The invention relates to a cable traversing mechanism, in particular to a three-section type underwater cable traversing mechanism of an underground electric submersible pump.
Background
During the exploitation process of offshore oil fields, old oil fields or low-pressure oil fields, because the pressure of oil and gas reservoirs is too low, an underwater electric submersible pump is required to be used for oil exploitation operation. The cable of the electric submersible pump is a channel for connecting a motor and a ground control system and transmitting a power link and PSI/PHD signals, is a special oil well cable with oil resistance, salt water resistance and chemical substance corrosion resistance, and works between oil casings.
The cable crossing device is a device which is arranged on an oil production wellhead of an electric submersible pump and used for penetrating through an oil pipe hanger and an upper flange and connecting the electric submersible pump with an underground power supply. The cable crossing device changes the traditional cable crossing mode and has the characteristics of good safety, high sealing performance, convenience in operation and the like. However, at present, the cable penetrator on the wellhead of the offshore oil field electric submersible pump in China is complex to install and maintain, and the development requirement of the automation level can not be met.
Disclosure of Invention
The invention mainly aims to provide a three-section type underwater cable traversing mechanism of an underground electric submersible pump, which utilizes an underwater operation robot ROV to realize underwater automatic installation and greatly improves the reliability and the assembly and maintenance efficiency of an underwater wet-type electric connector.
In order to achieve the above object, the present invention provides a three-section type downhole electrical submersible pump underwater cable traversing mechanism, the number of contacts of the three-section type downhole electrical submersible pump cable traversing mechanism is at least three cores, and the three-section type downhole electrical submersible pump underwater cable traversing mechanism comprises: the bottom wet plug is fixedly arranged on the underwater oil extraction equipment and is connected with the electric submersible pump through an armored cable; the through cable comprises a lower wet socket and an upper wet plug, the tail of the lower wet socket is hermetically connected with the tail of the upper wet plug through a hose, the hose is filled with insulating oil, and the lower wet socket is hermetically connected with the bottom wet plug; an ROV-operated wet socket sealingly connected with the upper wet plug.
Preferably, the bottom wet plug comprises an outer sleeve with a water-proof film covered on the inner wall and a bottom wet plug body abutting against one end of the outer sleeve, the bottom wet plug body is in threaded connection with the underwater oil extraction equipment through a guide mechanism and is in sealed connection with the guide mechanism, a bottom contact pin in sealed fit is axially inserted in the center of the bottom wet plug body, and one end of the bottom contact pin inserted into the bottom wet plug body is connected with the armored cable; the bottom wet plug further comprises a cable fixing frame arranged in the waterproof film, one end of the cable fixing frame is buckled on the bottom wet plug body, and the other end of the cable fixing frame is buckled on a cable protection device used for isolating the armored cable.
Preferably, the cable protection device comprises a cable locking cavity and a cable clamping body, the cable locking cavity is sleeved outside the armored cable and is sleeved with the outer sleeve, and a cable gland is sleeved at the inner side end of the cable locking cavity, which enters the outer sleeve; the outer side end of the cable locking cavity, which is exposed out of the outer sleeve, is in threaded connection with one end of the cable clamping body, and a cable clamping ring is clamped at the outer side end of the cable locking cavity.
Further preferably, the inner side of the other end of the cable clamping body is clamped with an armored cable snap ring, the cable clamping body is radially penetrated and screwed with a clamping body locking nut, and the clamping body locking nut penetrates through the cable clamping body and then abuts against the armored cable snap ring.
Further preferably, the lower wet socket comprises a lower socket body, an external water-separating sleeve and an internal water-separating sleeve which are coaxially arranged are arranged in the lower socket body, and blocking pieces are arranged at two ends of the external water-separating sleeve; a second pressure balance cavity filled with insulating oil is formed among the external water-separating sleeve, the plugging pieces at two ends and the internal water-separating sleeve, one end of the internal water-separating sleeve is hermetically connected with the plugging piece far away from the rear end of the lower socket body, a lower thimble axially penetrates through the plugging piece at the front end of the external water-separating sleeve, the lower thimble penetrates through the plugging piece at the front end into the internal water-separating sleeve, the lower thimble is respectively connected with the plugging piece and the internal water-separating sleeve in a sliding and sealing manner, a conductive element assembled with the lower thimble in a sliding manner is arranged in the internal water-separating sleeve, a bottom contact pin is abutted against the lower thimble and then pushed into the conductive element, and the other end of the conductive element passes through the internal water-separating sleeve and then is connected with an armored cable; the tail part of the lower socket body is hermetically connected with a lower hose fixing support used for fixing a hose.
Still further preferably, the lower hose fixing bracket is hermetically connected with the tail part of the lower socket body through a sealing sleeve, the hose fixing bracket comprises a hose connector, one end of the hose connector is hermetically connected with the sealing sleeve, the hose is sleeved outside the hose connector, a cable locking sleeve is arranged outside the part of the hose connected with the hose connector, the cable locking sleeve is connected with the hose connector through a locking ring, and the locking ring is in threaded connection with the hose connector.
Preferably, the upper portion wet plug includes an upper portion plug body, and the one end that lower part wet socket was kept away from to upper portion plug body alternates upper portion contact pin, and upper portion contact pin and upper portion plug body sealing connection, the other end and the upper portion hose mount sealing connection of upper portion plug body.
Preferably, the upper plug body is hermetically connected with an upper hose fixing frame through an upper sealing sleeve, the upper hose fixing frame comprises an upper hose connector, the hose is sleeved outside the upper hose connector, an upper cable locking sleeve is covered on the periphery of the part of the hose connected with the hose connector, and an upper locking ring is sleeved on the periphery of the position where the upper cable locking sleeve is connected with the upper hose connector.
Preferably, the ROV operation wet socket comprises a front shell adjacent to the upper wet plug and a tail shell screwed with the front shell, an ROV socket body is arranged in the front shell, an ROV external water-proof sleeve and an ROV internal water-proof sleeve which are coaxially arranged are arranged in the ROV socket body, a sealing piece is arranged at the position, close to the front end of the upper wet plug, of the ROV external water-proof sleeve, an ROV thimble assembled with the upper contact pin is arranged in the ROV internal water-proof sleeve in a sliding penetrating mode, one end of the ROV thimble penetrates through the sealing piece to be assembled with the upper contact pin, and the other end of the ROV thimble is connected with the ROV; an ROV operating handle is arranged on the tail shell, and the armored cable is connected with the ROV conductive element through the tail shell.
Preferably, the ROV conductive element comprises an ROV plug conductive rod, the ROV plug conductive rod is connected with the ROV thimble in a sliding manner, and an ROV conductive rod sealing sleeve is sealed outside the ROV plug conductive rod; an ROV spring is arranged in the ROV plug conducting rod.
The invention has the beneficial effects that:
according to the invention, the bottom wet plug is arranged on the oil extraction equipment, and then the bottom wet plug and the ROV operation wet socket are connected by using the through cable, so that the condition that the ROV operation wet socket is directly plugged with the bottom wet plug is avoided, the operation is simple, and the installation is convenient.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a cross-sectional view of a bottom wet plug of a three-section downhole electrical submersible pump cable traversing mechanism of the present invention;
FIG. 2 is a cross-sectional view of the lower wet socket of the crossing cable of the three-section type downhole electrical submersible pump underwater cable crossing mechanism of the present invention;
FIG. 3 is a cross-sectional view of the upper wet plug of the crossing cable of the three-section type downhole electrical submersible pump underwater cable crossing mechanism of the present invention;
FIG. 4 is a partial cross-sectional view of an ROV operated wet socket of the three-section downhole electrical submersible pump subsea cable traversing mechanism of the present invention;
FIG. 5 is a schematic view of the combination of the bottom wet plug and the lower wet socket of the underwater cable traversing mechanism of the three-section type downhole electric submersible pump according to the present invention;
FIG. 6 is a schematic overall structure diagram of a traversing cable of the three-section type underground electric submersible pump underwater cable traversing mechanism.
Description of the reference numerals
10. A hose; 20. an armored cable; 30. an underwater oil recovery device;
40. a guide mechanism; 50. a Christmas tree top device body;
100. a bottom wet plug;
102. a cable gland; 103. A seal sleeve fixing ring;
104. a water-barrier film; 105. A cable locking cavity; 106. Locking the nut;
107. an outer sleeve locking ring; 108. A cable clamping nut; 109. A cable snap ring;
110. a cable clamping body; 111. A cable-armored snap ring; 112. Clamping the body lock nut;
113. an outer sleeve; 114. A cable fixing frame; 115. A bottom wet plug body;
116. a seal screw; 117. Inserting a pin at the bottom; 118. A bottom O-shaped sealing ring;
119. a bottom pressure balance hole; 120. a first pressure balance chamber;
200. a lower wet socket;
201. the lower V-shaped front part is sealed; 202. A lower thimble; 203. A lower guide pin;
204. an external water-separating jacket; 205. A lower socket body; 206. A plug conductive rod;
207. a conductive rod sealing sleeve; 208. A spring guide rod;
210. a lower seal cartridge; 211. A lower locking ring;
212. a lower cable locking sleeve; 214. A lower retainer ring; 215. A lower seal screw;
219. a lower spring; 220. An internal water-separating jacket;
221. a lower pressure balance hole; 222. a hose connector;
230. a blocking member; 231. a second pressure balance chamber;
300. an upper wet plug;
302. an upper locking ring; 303. An upper hose fitting;
304. a sealing sleeve locking ring; 305. An upper first O-ring seal;
306. an upper seal cartridge; 307. An upper second O-ring seal; 308. An upper plug body;
309. inserting a pin O-shaped sealing ring; 310. An upper pin is inserted; 311. An upper seal screw;
312. an upper cable locking sleeve;
400. an ROV-operated wet socket;
401. v-shaped front sealing; 402. An ROV thimble; 403. An ROV guide pin;
404. an ROV socket body; 405. An ROV outer water-blocking jacket; 406. An ROV internal water-blocking jacket;
407. a ROV conducting rod sealing sleeve; 408. An ROV spring guide; 409. an ROV plug conductive rod;
410. a front housing; 411. A tail housing; 412. An ROV operating handle;
414. an ROV spring; 415. ROV pressure balance port.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The embodiment provides a three-section type underground electric submersible pump underwater cable traversing mechanism, the number of contacts of the three-section type underground electric submersible pump cable traversing mechanism is at least three cores, and the three-section type underground electric submersible pump underwater cable traversing mechanism comprises a bottom
Specifically, as shown in fig. 1, the bottom
In addition, in this embodiment, the water-stop film 104, the cable locking cavity 105, the bottom wet plug body 115, the bottom contact pin 117 (the bottom contact pin 117 and the bottom wet plug body are hermetically connected by the bottom O-ring 118), and the cable sealing boot 102 together form a first pressure balance cavity 120, the first
As shown in fig. 2, the lower
In the present embodiment, during the mating process between the bottom
In the present embodiment, as shown in fig. 3, the upper
As shown in fig. 4, the ROV-operated wet socket 400 includes a front housing 410 and a rear housing 411 adjacent to the upper
In this embodiment, the process of mating the upper
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.
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