CN202392109U - Two-stage seal structure for dynamic seal of underground dynamic drilling tool - Google Patents
Two-stage seal structure for dynamic seal of underground dynamic drilling tool Download PDFInfo
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- CN202392109U CN202392109U CN 201120462687 CN201120462687U CN202392109U CN 202392109 U CN202392109 U CN 202392109U CN 201120462687 CN201120462687 CN 201120462687 CN 201120462687 U CN201120462687 U CN 201120462687U CN 202392109 U CN202392109 U CN 202392109U
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- plunger
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Abstract
The utility model discloses a two-stage seal structure for a dynamic seal of an underground dynamic drilling tool, wherein the two-stage seal structure for the dynamic seal of the underground dynamic drilling tool comprises a plunger, a plunger cylinder, a balanced plunger and a cap, wherein the plunger is cylindrical; a cylinder at the top of the plunger is provided with an outer thread; two first-stage annular seal grooves are formed on a cylinder at the lower part of the plunger; a balanced plunger cavity is formed at the center of the plunger; a low-pressure oil hole vertical to the axial direction of the cylinder is formed on the lower part of the balanced plunger cavity; the balanced plunger is hub-shaped cylindrical; the middle part of the balanced plunger cavity is provided with a second-stage annular seal groove; a blind hole is formed at the center of the balanced plunger cavity; the plunger is in threaded connection with the cap through the outer thread at the top; the plunger is installed in the plunger cylinder; the sealing between the high-pressure oil in the plunger cylinder and the low-pressure oil in the balanced plunger cavity is realized through installing an upper-layer seal structure in the first-stage annular seal groove at the upper layer and installing a lower-layer seal structure and a retainer ring in the first-stage annular seal groove at the lower layer; the balanced plunger is installed in the balanced plunger cavity; the balanced plunger cavity is filled with low-pressure oil; and the sealing between the low-pressure oil in the balanced plunger cavity and the external mud is realized for the balanced plunger and the balanced plunger cavity through a seal structure installed in the second-stage annular seal groove.
Description
Technical field
The utility model relates to and a kind ofly is used for the mud motor motive sealing and uses the two-stage sealing configuration, belongs to Instrument technology field under the oil well.
Background technique
The rotary steerable drilling technology is a new drilling technology that rises in order to adapt to modern complex structural well and saving petroleum exploration and development cost needs; The rotary steering system carries out steerable drilling under the condition of drill string full rotation; It is more smooth to have well track, and the advantage that extended distance is bigger is to guaranteeing the well track quality; Improve bit speed and efficient, it is all significant to satisfy the demand of boring complex structural well.Rotary steerable tool is the core drive performance element of rotary steering system, and the suitable lateral force through rotary steerable tool in the drilling process forms desirable well track, finally reaches the purpose of drillng operation.
The working principle of rotary steerable tool has two kinds of pushing type and sensing formulas; The pushing type guiding instrument contacts the reaction force that produces through steering tool power performance element with the borehole wall change bit heading; And the formula of sensing steering tool utilizes the bending of drilling tool mandrel that bit heading is changed; No matter be pushing type or sensing formula steering tool, final purpose all is the target spot that makes the bit heading expectation.
The general motive sealing of adopting nonmetal refractory seal structure to realize plunger of existing down-hole equipment power output plunger, one side is a system high pressure hydraulic oil during sealing configuration work, an other side is a mud; As shown in Figure 1, comprise plunger 4 and plunger case 6, between plunger 4 and plunger case 6, adopt two sealing configurations 17; Outside mud and high pressure oil 5 are separated, and under the higher motion conditions of system's output pressure ratio, the sealing load class requirement is than higher; Than higher, the wearing and tearing of sealing configuration are very fast to the system structure design required precision, cause the leakage of seal arrangement easily; In a single day mud get into oil hydraulic circuit, will produce fatal destruction to system.
The model utility content
The technology of the utility model is dealt with problems and is: overcome the deficiency of existing technology, providing a kind of can effectively increase the reliability of system's dynamic seal apparatus and the two-stage sealing configuration is used in the mud motor motive sealing that is used in life-span.
The technical solution of the utility model is: a kind ofly be used for the mud motor motive sealing and use the two-stage sealing configuration; Comprise plunger, plunger case, balance plunger and block; Wherein said plunger is cylindrical, top cylinder threading, two first order annular seal grooves of lower cylindrical processing; Processing balance plunger chamber, center; The processing of the bottom in balance plunger chamber perpendicular to cylinder axis to the low pressure oilhole, the filling low pressure oil balance plunger chamber in, described balance plunger is that wheel hub shape is cylindrical; The middle part is a second level annular seal groove; The center processing blind hole, plunger is threaded with block through tip male thread, and plunger is installed in the plunger case; Through the upper strata sealing configuration being installed in the first order annular seal groove on upper strata and lower floor's sealing configuration being installed in the first order annular seal groove of lower floor and back-up ring is realized high pressure oil and the sealing between the low pressure oil in the balance plunger chamber in the plunger case; Balance plunger is installed in the balance plunger chamber, and the low pressure oilhole of the low pressure oil in the balance plunger chamber through the bottom gets into two first order annular seal grooves, and balance plunger and balance plunger chamber are through being installed in low pressure oil and the sealing between the outside mud in the sealing configuration realization balance plunger chamber in the annular seal groove of the second level.
Described low pressure oil is consistent with the pressure of outside mud.
Described upper strata sealing configuration adopts Glais ring or ladder envelope sealing configuration.
Described lower floor sealing configuration and sealing configuration adopt fluororubber O-type seal ring, Glais ring or ladder envelope sealing configuration.
Leave annular clearance between described block and the balance plunger, outside mud gets into annular clearance, realizes the pressure balance function.
The utility model compared with prior art has following advantage:
(1) the utility model is through adopting the two-stage sealing configuration to rotary steerable tool power output plunger case; High pressure oil area and extraneous mud are isolated through the low pressure oil district; Carry out the seal arrangement design between high pressure oil area and low pressure oil district, low pressure oil district and the mud pressure then respectively, can reliably realize the motive sealing function of plunger assembly;
(2) the utility model is provided with the pressure balance plunger on hydraulic oil output cylinder; The pressure balance plunger can compensate the low pressure oil change in volume that the high pressure oil area leakage causes because pressure and temperature variation reach automatically, can effectively increase the reliability and the life-span of system's dynamic seal apparatus;
(3) the utility model is applicable to the pushing type rotary steerable tool, is exclusively used in the steering tool power performance element that relies on airtight hydraulic oil.
Description of drawings
Fig. 1 is the existing structure schematic representation;
Fig. 2 is the utility model overall structure schematic representation;
Fig. 3 is the utility model piston structure schematic representation;
Fig. 4 is the utility model balance plunger structural representation.
Embodiment
Just combine accompanying drawing that the utility model is done further introduction below.
The utility model mesohigh oil directly do not realize and mud between sealing function; But at first and between the airtight low pressure oil seal, be called first order sealing, seal between low pressure oil district and the mud then; Be called second level sealing, promptly the utility model has adopted the two-stage sealing; For first order sealing, the working medium of seal arrangement both sides is cleaner, and seal arrangement is played certain lubrication; The second level is sealed into the low pressure motive sealing, and promptly the pressure of seal arrangement both sides equates the motive sealing under the situation basically, has reduced the design difficulty of seal arrangement, realizes easily on the engineering.
The utility model is as shown in Figure 2; Comprise plunger 4, upper strata sealing configuration 3, lower floor's sealing configuration 16, plunger case 6, balance plunger 2, sealing configuration 1 and block a shot 10; With seal arrangement 1, upper strata sealing configuration 3, lower floor's sealing configuration 16, be contained on balance plunger 2 and the plunger 4; Plunger 4 is installed in the plunger case 6, setting pressure balance plunger 2 after the filling low pressure oil in the balance plunger chamber 7 of plunger 4, will block a shot 10 internal threads and plunger 4 outside threads are tightened.
Leave annular clearance 17 between block 10 and the balance plunger 2, outside mud gets into annular clearance 17, realizes the pressure balance function, and low pressure oil is consistent with the pressure of outside mud.
The seal arrangement 1 of the utility model is isolated low pressure oil and extraneous mud in system's inner high voltage oil 5, the balance plunger chamber 7 with upper strata, lower floor's sealing configuration 3,16 fully; There are two hydraulic channels and mud pressure to seal owing to balance plunger 2 in the practical work process; The one, through upper strata seal arrangement 3; Other one is seal arrangement 1; According to pressure balance principle be prone to know low pressure oil pressure all the time with the mud pressure balance, upper strata seal arrangement 3 and seal arrangement 1 have become one almost near the low pressure motive sealing of zero pressure like this, Seal Design realizes easily.
10 upper surfaces of blocking a shot are the plunger assembly clutch end; Be connected through the screw thread installation with plunger 4, plunger 2 thrust are in the eccentric pushing block of rotary steerable tool, and eccentric pushing block contacts with the borehole wall; Rely on reaction force to realize the adjustment of lateral force, and then realize the guide function of rotary steerable tool.
The unspecified part of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (5)
1. one kind is used for the mud motor motive sealing and uses the two-stage sealing configuration; It is characterized in that: comprise plunger (4), plunger case (6), balance plunger (2) and block (10); Wherein said plunger (4) is cylindrical; Top cylinder threading (11); Lower cylindrical processing two first order annular seal grooves (12,15), processing balance plunger chamber (7), center, the bottom processing of balance plunger chamber (7) perpendicular to cylinder axis to low pressure oilhole (9); Fill low pressure oil in the balance plunger chamber (7); Described balance plunger (2) is that wheel hub shape is cylindrical, and the middle part is second level annular seal groove (13), center processing blind hole (14); Plunger (4) is threaded with block (10) through tip male thread; Plunger (4) is installed in the plunger case (6), and through upper strata sealing configuration (3) being installed in the first order annular seal groove (12) on upper strata and high pressure oil (5) and the sealing between the low pressure oil in balance plunger chamber (7) in lower floor's sealing configuration (16) and back-up ring (8) the realization plunger case (6) being installed in the first order annular seal groove (15) of lower floor, balance plunger (2) is installed in the balance plunger chamber (7); Low pressure oil in the balance plunger chamber (7) gets into two first order annular seal grooves (12,15) through the low pressure oilhole (9) of bottom, and balance plunger (2) and balance plunger chamber (7) are through being installed in low pressure oil and the sealing between the outside mud in sealing configuration (1) the realization balance plunger chamber (7) in the second level annular seal groove (13).
2. according to claim 1ly a kind ofly be used for the mud motor motive sealing and use the two-stage sealing configuration, it is characterized in that: described low pressure oil is consistent with the pressure of outside mud.
3. according to claim 1ly a kind ofly be used for the mud motor motive sealing and use the two-stage sealing configuration, it is characterized in that: described upper strata sealing configuration (3) adopts Glais ring or ladder envelope sealing configuration.
4. according to claim 1ly a kind ofly be used for the mud motor motive sealing and use the two-stage sealing configuration, it is characterized in that: described lower floor sealing configuration (16) and sealing configuration (1) adopt fluororubber O-type seal ring, Glais ring or ladder envelope sealing configuration.
5. according to claim 1ly a kind ofly be used for the mud motor motive sealing and use the two-stage sealing configuration; It is characterized in that: leave annular clearance (17) between described block (10) and the balance plunger (2); Outside mud gets into annular clearance (17), realizes the pressure balance function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120462687 CN202392109U (en) | 2011-11-21 | 2011-11-21 | Two-stage seal structure for dynamic seal of underground dynamic drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120462687 CN202392109U (en) | 2011-11-21 | 2011-11-21 | Two-stage seal structure for dynamic seal of underground dynamic drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202392109U true CN202392109U (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120462687 Expired - Lifetime CN202392109U (en) | 2011-11-21 | 2011-11-21 | Two-stage seal structure for dynamic seal of underground dynamic drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202392109U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505704A (en) * | 2012-09-10 | 2014-03-12 | Aquamarine Power Ltd | Passive lubricant pressure control for cylinder seal |
| CN109707315A (en) * | 2019-03-12 | 2019-05-03 | 张成功 | A kind of bearing of drilling well speedup power tamping machine |
| CN114909596A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity type gas storage structure convenient to construction |
-
2011
- 2011-11-21 CN CN 201120462687 patent/CN202392109U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2505704A (en) * | 2012-09-10 | 2014-03-12 | Aquamarine Power Ltd | Passive lubricant pressure control for cylinder seal |
| CN109707315A (en) * | 2019-03-12 | 2019-05-03 | 张成功 | A kind of bearing of drilling well speedup power tamping machine |
| CN109707315B (en) * | 2019-03-12 | 2024-04-16 | 东营华来智能科技有限公司 | Bearing for drilling speed-increasing dynamic compactor |
| CN114909596A (en) * | 2022-06-23 | 2022-08-16 | 西安热工研究院有限公司 | Gravity type gas storage structure convenient to construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |
|
| CX01 | Expiry of patent term |