Gas extraction pump rubber

Abstract

This document describes apparatus, systems, and methods for using pump rubber in degassing pumps. In some examples, one or more embodiments include a first quantity of material forming the inner surface of the pump rubber and a second quantity of material forming the outer surface of the pump rubber. The pump rubber may be configured as a hollow, elongated cylinder. The first quantity of material may be configured to provide abrasion resistance to wear from drilling fluid passing through the pump rubber, as well as resistance to thermal and chemical stresses from the drilling fluid passing through the pump rubber. The second quantity of material may be configured to provide fatigue resistance during compression and decompression of the pump rubber.

Description

Cross-reference paragraphs

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 616,920, filed January 2, 2024, entitled “MUTI-LAYERED RUBBER FOR GASEXTRACTOR PUMP,” the disclosure of which is incorporated herein by reference. Background Technology

[0002] Wellbores can be drilled into surface locations or the seabed for various exploration or extraction purposes. For example, wellbores can be drilled to obtain fluids such as liquid and / or gaseous hydrocarbons stored in underground formations and to extract fluids from the formations. Wellbores used for producing or extracting fluids can be casing around the wellbore walls. Various drilling methods can be used, depending in part on the characteristics of the formations through which the wellbore passes.

[0003] The drilling system may use one or more drill collars to provide weight on the drill bit, which are located in a bottom hole assembly near the drill bit. The bottom hole assembly may also include communication devices to transmit information about the drill bit and other downhole parameters to a receiving device located above the drill bit. Attached Figure Description

[0004] Figure 1 This is an example schematic representation of a drilling system according to one or more embodiments of this disclosure.

[0005] Figure 2 This is a perspective view of an example degasser pump assembly used in a drilling system according to one or more embodiments of this disclosure.

[0006] Figure 3 This is a perspective view of an example of pump rubber used with a degasser pump according to one or more embodiments of this disclosure.

[0007] Figure 4 This is a perspective view of an example of the inner layer of a pump rubber used with a degasser pump according to one or more embodiments of this disclosure.

[0008] Figure 5 This is a perspective view of an example of the outer layer of a pump rubber used with a degasser pump according to one or more embodiments of this disclosure.

[0009] Figure 6 This is a perspective cross-sectional view of an example of forming pump rubber in a mold for use with a degassing pump according to one or more embodiments of the present disclosure. Detailed Implementation

[0010] Drilling operations targeting fluids such as liquid and / or gaseous hydrocarbons can utilize a drilling system to drill through a wellbore to locate such fluids. During such drilling operations, gases may be entrained in the drilling fluid. These gases can be transported from the wellbore to the surface via the drilling fluid. In some examples, such gases can be removed for sampling. However, the presence of such gases in the drilling fluid can cause a decrease in hydrostatic pressure within the drilling system.

[0011] Sampling and / or other removal of this gas can be performed using a degasser. As used herein, a degasser can be a device for removing entrained gases from drilling fluid. Drilling fluid can be supplied to the degasser via a degasser probe. As used herein, a degasser probe can be a device for delivering drilling fluid to the degasser. For example, the degasser probe can utilize a degasser pump to generate negative pressure to deliver drilling fluid to the degasser (e.g., via suction).

[0012] During drilling operations, the drill bit may drill into surface formations to locate and / or obtain the aforementioned fluids. In some examples, the drilling fluid may be delivered to a degasser via a degasser pump. The degasser pump may be a peristaltic pump, which includes pump rubber within the degasser pump body. The pump rubber may be a conduit for delivering the drilling fluid through the degasser pump to the degasser. As part of the pumping process, the pump rubber may be compressed and decompressed by several rollers within the degasser pump. Therefore, due to the compression and decompression cycles, the pump rubber may fatigue and potentially fail.

[0013] Furthermore, the pump rubber may be subjected to chemical stress, thermal stress, and / or abrasion from the drilling fluid passing through it. Due to the chemical and / or thermal stress and abrasion from the drilling fluid, the pump rubber may wear down and potentially fail. Previous methods used a single material to form the pump rubber. However, because the pump rubber undergoes fatigue and / or abrasion due to the compression and decompression cycles of the degassing pump rollers, as well as chemical and / or thermal stress from the drilling fluid, and abrasion, a single material may not provide resistance to the chemical and / or thermal stress from the drilling fluid, and abrasion, due to the compression and decompression cycles. Embodiments of this disclosure may include a pump rubber formed from a first quantity of materials and a second quantity of materials. The first quantity of materials may be configured to provide abrasion resistance and resistance to chemical and / or thermal stress to resist abrasion caused by the drilling fluid passing through the pump rubber. The second quantity of materials may be configured to provide fatigue resistance during the compression and decompression of the pump rubber.

[0014] In the following description, numerous details are set forth to provide an understanding of some embodiments of this disclosure. It should be understood that the following disclosure provides many different embodiments or examples for implementing various features of the various embodiments. Specific examples of components and arrangements are described below to simplify this disclosure. These are merely examples and are not intended to be limiting. However, those skilled in the art will understand that the system and / or methods can be practiced without these details, and many variations or modifications can be made to the described embodiments. This description is not restrictive but merely made to describe the general principles of implementation. The scope of the described implementations should be determined with reference to the published claims.

[0015] As used herein, the terms “connect,” “connection,” “connected,” “in connection with,” and “connecting” are used to mean “directly connected to” or “connected to” via one or more elements; and the term “set” is used to mean “one element” or “more than one element.” Furthermore, the terms “linked,” “connected,” “linked together,” and “connected with” are used to indicate “directly linked together” or “linked together via one or more elements.” As used herein, the terms “upper” and “lower,” “upper part” and “lower part,” “top” and “bottom,” and other similar terms indicating relative position with respect to a given point or element are used to more clearly describe some element. Typically, these terms refer to a reference point on the ground from which drilling operations begin, with the total depth as the lowest point, where the well (e.g., wellbore, borehole) is vertical, horizontal, or inclined relative to the ground.

[0016] The degree language used herein (such as the terms “approximately,” “about,” “substantially,” and “basically” as used herein) refers to a value, quantity, or characteristic that is close to the stated value, quantity, or characteristic while still performing the desired function or achieving the desired result. For example, the terms “approximately,” “about,” “substantially,” and “basically” can refer to a quantity that differs from the stated quantity by less than 10%, less than 5%, less than 1%, less than 0.1%, and / or less than 0.01%. As another example, in some embodiments, the terms “substantially parallel” and “substantially parallel” or “substantially perpendicular” and “substantially perpendicular” refer to a value, quantity, or characteristic that differs from perfect parallelism or perpendicularity by less than or equal to 15 degrees, 10 degrees, 5 degrees, 3 degrees, 1 degree, or 0.1 degrees, respectively.

[0017] These embodiments are described in sufficient detail to enable one or more embodiments of this disclosure to be practiced by a person skilled in the art. It should be understood that other embodiments may be utilized, and process, electrical, and / or structural changes may be made without departing from the scope of this disclosure.

[0018] It should be understood that elements shown in the various embodiments herein may be added, exchanged, combined, and / or deleted to provide several additional embodiments of this disclosure. The scale and relative size of the elements provided in the accompanying drawings are intended to illustrate embodiments of this disclosure and should not be considered limiting.

[0019] The figures in this document follow a numbering convention, where the first digit or more correspond to the figure number, and the remaining digits identify the elements or parts in the figure. Similar elements or parts between different figures can be identified by using similar digits. For example, 111 can be referenced... Figure 1 Component "11" in the text, and similar components can be found in the text. Figure 2 It is cited as 211.

[0020] The word “one” or “several” as used in this article can refer to one or more such things, while “multiple” can refer to more than one such thing. For example, “several parts” can refer to one or more parts, while “multiple parts” can refer to more than one part.

[0021] Figure 1 This is an example schematic representation of a drilling system 100 according to one or more embodiments of the present disclosure. The drilling system 100 includes a drilling rig 103 for rotating a drilling tool assembly 104 that extends downward into a wellbore 102. The drilling tool assembly 104 may include a drill string 105, a bottom hole assembly 106, and a drill bit 110 attached to the downhole end of the drill string 105.

[0022] The drill string 105 may include several joints of the drill pipe 108 connected end-to-end via a tool joint 109. The drill string 105 transmits drilling fluid through a central bore and transmits rotational power from the drilling rig 103 to the bottom borehole assembly 106. In some embodiments, the drill string 105 may also include additional components such as sub sections, pup joints, etc. The drill pipe 108 provides a hydraulic passage through which drilling fluid is pumped from the surface. The drilling fluid exits through nozzles, orifices, or other orifices of selected size in the drill bit 110 to cool the drill bit 110 and its cutting structures, and to remove drill cuttings from the wellbore when it is drilled.

[0023] The bottom hole assembly 106 may include the drill bit 110 or other components. Example bottom hole assembly 106 may include additional or other components (e.g., connected between the drill string 105 and the drill bit 110). Examples of additional components for the bottom hole assembly 106 include degassing probes, drill collars, stabilizers, measurement-while-drilling (“MWD”) tools, logging-while-drilling (“LWD”) tools, rotary steerable system (“RSS”) tools, sensors, downhole motors, steerable tools, downhole reamers, casing shoes, hydraulic disconnect joints, slappers, vibration or damping tools, other components, and / or combinations thereof.

[0024] Generally, drilling system 100 may include other drilling components and accessories, such as specialized valves (e.g., kerb plugs, blowout preventers, and safety valves). Additional components included in drilling system 100 may be considered part of drilling tool assembly 104, drill string 105, or bottom hole assembly 106, depending on their location within drilling system 100.

[0025] The drill bit 110 in the bottom borehole assembly 106 can be any type of drill bit suitable for eroding downhole materials. For example, drill bit 110 can be a drill bit suitable for drilling surface formation 101. An exemplary type of drill bit for drilling surface formation is a fixed-cutting or scraper bit. In other embodiments, drill bit 110 can be a milling shoe for removing metals, composites, elastomers, other downhole materials, and / or combinations thereof. For example, drill bit 110 can be used with a directional drilling tool to grind into casing 107 fitted onto wellbore 102. Drill bit 110 can also be a flat-end milling shoe for milling away tools, plugs, cement, other materials, and / or combinations thereof within wellbore 102. Drill cuttings or other rock cuttings formed by using the milling shoe can be lifted to the surface or allowed to fall downhole.

[0026] As described above, the bottom borehole assembly 106 may include a drill bit 111. The drill bit 111 can deliver drilling fluid to a degasser 112. The degasser 112 can remove entrained gas from the drilling fluid retrieved by the drill bit 111. The degasser 112 may include an intake head, a filter screen, and a worm gear for filtering the drilling fluid, and a degasser pump 120 for delivering the drilling fluid to the degasser 112. The degasser pump 120 may be a peristaltic pump configured to pump drilling fluid to the degasser 112.

[0027] Figure 2 This is a cross-sectional view of an example degasser pump 220 used in a drilling system according to one or more embodiments of this disclosure. Figure 2As shown, the degasser pump 220 may include a pump rubber 230 connected to a pump inlet 224 and a pump outlet 222. The pump rubber 230 may be a conduit for allowing drilling fluid and drill cuttings from the formation rock to pass through the degasser pump 220. Drilling fluid may enter the degasser pump 220 through the pump inlet 224 and exit the degasser pump 220 through the pump outlet 222.

[0028] The degasser pump 220 may include a rotor 226 and several rollers 228-1, 228-2 and 228-3 attached to the rotor 226. Figure 2 Pump 220 is shown with three rollers, but embodiments may include any number of rollers. Rotor 226 may be powered and configured to rotate on its central axis, causing several rollers 228-1, 228-2, and 228-3 to rotate and contact pump rubber 230. The rollers 228-1, 228-2, and 228-3 may be configured to contact pump rubber 230, wherein pump rubber 230 is bent within degassing pump 220. As the rollers rotate about the central axis of rotor 226, the rollers 228-1, 228-2, and 228-3 may compress and decompress pump rubber 230 to allow drilling fluid to enter degassing pump 220 through pump inlet 224, pass through pump rubber 230, and exit degassing pump 220 at a constant flow rate through pump outlet 222.

[0029] As part of the pumping process, the pump rubber 230 can be compressed and decompressed by rollers 228-1, 228-2, and 228-3 in the degassing pump as the rollers are rotated in a circular motion by rotor 226. Therefore, the pump rubber 230 may fatigue and potentially fail due to the compression and decompression cycle. Furthermore, the pump rubber 230 may be subjected to chemical stress, thermal stress, and / or abrasion from the drilling fluid passing through it. Due to the chemical and / or thermal stress and abrasion from the drilling fluid, the pump rubber 230 may wear down and potentially fail. The pump rubber 230 can be formed from a first quantity of materials and a second quantity of materials. The first quantity of materials may be exposed to drill cuttings and drilling fluid on the inner surface of the pump rubber 230 and may be configured to provide resistance to abrasion and / or fatigue, as well as resistance to chemical and / or thermal stress, to resist abrasion caused by drill cuttings and drilling fluid passing through the pump rubber 230. A second quantity of material may be contacted by several rollers 228-1, 228-2 and 228-3 of the pump rubber 230 for compression and decompression, and the outer layer of the pump rubber 230 may be configured to provide fatigue resistance and structural strength when the pump rubber 230 is compressed and decompressed by the rollers 228-1, 228-2 and 228-3.

[0030] The pump rubber 230 can be configured to bend at an angle of approximately 60 degrees within the degassing pump 220. Where the pump rubber 230 is bent within the degassing pump 220, it can be under tension and compression. A first quantity of materials and a second quantity of materials forming the pump rubber 230 can be configured to provide fatigue resistance to the pump rubber 230 when it is compressed and decompressed by several rollers 228-1, 228-2, and 228-3 under tension and compression.

[0031] Figure 3 This is a perspective view of an example of a pump rubber used with a degasser pump according to one or more embodiments of the present disclosure. The pump rubber 330 may include an inner layer 338 and an outer layer 336 formed as a hollow, elongated cylinder. The hollow, elongated cylinder may include a first opening 332 and a second opening 334, the first opening being configured to attach to an inlet of the degasser pump and the second opening being configured to attach to an outlet of the degasser pump.

[0032] The inner layer 338 of the pump rubber 330 may be formed of a first quantity of materials. The first quantity of materials may include a first material that provides resistance to abrasion from drill cuttings in the drilling fluid passing through the pump rubber 330. The first material may include glass, Kevlar, aramid, polyester, and other types of materials. The first quantity of materials may also include a second material that provides resistance to fatigue wear caused by the compression and decompression of the pump rubber 330 as drilling fluid is pumped through it. The second material may include nitrile, hydrogenated nitrile butadiene rubber (HNBR), and / or neoprene rubber, and other types of materials.

[0033] The outer layer 336 of the pump rubber 330 may be formed of a second quantity of materials. This second quantity of materials can provide resistance to fatigue wear caused by the compression and decompression of the pump rubber 330 as drilling fluid is pumped through it. The second quantity of materials may include nitrile rubber, hydrogenated nitrile butadiene rubber (HNBR), and / or chloroprene rubber, as well as other types of materials.

[0034] The pump rubber 330 may include an inner surface 340 that defines an opening through which drilling fluid passes. The inner surface 340 is part of an inner layer 338 formed of a first amount of material. The inner surface 340 formed of the first amount can provide resistance to abrasion and chemical and / or thermal stresses caused by the drilling fluid contacting the inner surface when it passes through the pump rubber.

[0035] The pump rubber 330 may include an outer surface 342. The outer surface may be formed of a second quantity of material that provides resistance to wear caused by the compression and decompression of the pump rubber 330 by the rollers attached to the rotor. The outer surface 342 formed of the second quantity of material also provides resistance to wear caused by the rollers passing over the outer surface 342 of the pump rubber during compression and decompression of the pump rubber 330.

[0036] Figure 4 This is a perspective view of an example of an inner layer of a pump rubber used with a degasser pump according to one or more embodiments of the present disclosure. The inner layer 438 of the pump rubber may be formed of a first quantity of materials. The first quantity of materials may include a first material 444, which provides resistance to abrasion from drilling fluid passing through the pump rubber. The first material 444 may include glass, Kevlar, aramid, polyester, and other types of materials. The first material 444 may be a woven fabric and / or have openings formed between the strands of the first material 444. The first quantity of materials may include a second material 446, which provides resistance to fatigue wear caused by compression and decompression of the pump rubber when drilling fluid is pumped through it. The second material 446 may include nitrile, hydrogenated nitrile butadiene rubber (HNBR), and / or neoprene rubber, and other types of materials. The second material 446 may be formed in the openings between portions of the first material 444. The combination of the first material 444 and the second material 446 can provide resistance to wear, chemical stress, and thermal stress from the inner surface 440 of the pump rubber in contact with drilling fluid, as well as resistance to wear caused by fatigue due to compression and decompression of the pump rubber.

[0037] Figure 5 This is a perspective view of an example of the outer layer of a pump rubber used with a degasser pump according to one or more embodiments of the present disclosure. The outer layer 536 of the pump rubber may be formed of a second quantity of material 548. The second quantity of material 548 can provide resistance to fatigue wear caused by the compression and decompression of the pump rubber when drilling fluid is pumped through the pump rubber 330. The second quantity of material 548 may include nitrile, hydrogenated nitrile butadiene rubber (HNBR) and / or neoprene rubber, as well as other types of materials.

[0038] An outer layer 536 may be formed on the inner layer. The outer layer 536 provides additional resistance to fatigue wear caused by compression and decompression of the pump rubber, as well as wear resistance to rollers that contact the outer layer 536 when the pump rubber is compressed and decompressed. The outer surface 542 of the outer layer 536 may be formed of a second quantity of material, which provides resistance to wear caused by the compression and decompression of the pump rubber 330 by rollers attached to the rotor. The outer surface 542 of the outer layer 536 formed of the second quantity of material also provides resistance to wear caused by the rollers passing over the outer surface 542 of the pump rubber when the rollers compress and decompress the pump rubber 330.

[0039] Figure 6 This is a perspective cross-sectional view of an example of forming pump rubber in a mold for use with a degassing pump according to one or more embodiments of the present disclosure.

[0040] Forming the pump rubber 630 may include forming an inner layer 638 by forming a first material of the inner layer 638 to a specific thickness (e.g., an inner diameter dimension), forming a second material in an opening between portions of the first material, and forming an outer layer 636 on the first and second materials of the inner layer 638. The outer layer 636 may be formed to an outer diameter dimension. The second material of the inner layer 638 and the outer layer 636 may then be cured to bond the inner layer 638 and the outer layer 636 together.

[0041] Forming pump rubber 630 may include forming an inner layer 638 by forming a first material of the inner layer 638 to a specific thickness, and forming an outer layer 636 on the first and second materials of the inner layer 638. The inner layer 638 may be formed on a mandrel. The inner layer 638 may be placed in a mold 650, and the outer layer 636 may be formed on the inner layer 638 in the mold 650. The outer layer 636 may then be cured to bond the inner layer 638 and the outer layer 636 together.

[0042] The pump rubber 630 may include a first material forming an inner layer 638 and a first material forming an outer layer 636. A second material is added to the first material of the inner layer 630, and the inner layer 638 is cured to the outer layer 636.

[0043] While specific embodiments have been illustrated and described herein, those skilled in the art will understand that any configuration intended to implement the same technology may be used in place of the specific embodiments shown. This disclosure is intended to cover any and all changes or variations of the various embodiments of this disclosure.

[0044] It should be understood that the above description is illustrative and not restrictive. Those skilled in the art will readily appreciate, upon reviewing the above description, combinations of the above embodiments and other embodiments not specifically described herein.

[0045] The scope of the various embodiments of this disclosure includes any other application using the above-described structures and methods. Therefore, the scope of the various embodiments of this disclosure should be determined with reference to the appended claims and all their equivalents.

[0046] In the detailed embodiments described above, various features are combined in the example embodiments shown in the drawings for the purpose of simplifying this disclosure. This approach of the disclosure should not be construed as reflecting an intention to claim more features than are expressly stated in each claim.

[0047] Conversely, as reflected in the appended claims, the subject matter of the invention lies in fewer features than all the features of a single disclosed embodiment. Therefore, all the appended claims are hereby incorporated into the detailed description, wherein each claim can be considered a separate embodiment.

Claims

1. A degassing pump rubber, comprising: A first quantity of material forming the inner surface of the pump rubber; as well as A second quantity of material forming the outer surface of the pump rubber; The pump rubber is configured as a hollow, elongated cylinder, and the first quantity of materials and the second quantity of materials form the pump rubber.

2. The degasser pump rubber of claim 1, wherein the first quantity of material comprises hydrogenated nitrile butadiene rubber (HNBR) reinforced with Kevlar.

3. The degasser pump rubber of claim 1, wherein the second quantity of material comprises HNBR.

4. The degasser pump rubber of claim 1, wherein the first quantity of material is configured to provide abrasion resistance to wear from drilling fluid passing through the pump rubber.

5. The degasser pump rubber of claim 1, wherein the first quantity of material is configured to provide resistance to wear caused by thermal and chemical stresses from drilling fluid passing through the pump rubber.

6. The degasser pump rubber of claim 1, wherein the second quantity of material is configured to provide fatigue resistance during compression and decompression of the pump rubber.

7. The degasser pump rubber of claim 6, wherein the first quantity of material is also configured to provide fatigue resistance during compression and decompression of the pump rubber.

8. A degasser pump, comprising: The first opening of the pump rubber connected to the inlet of the degasser pump; A second opening in the pump rubber connected to the outlet of the degasser pump; as well as A plurality of rollers configured to compress and decompress the pump rubber as the rotor rotates about an axis. The pump rubber comprises an inner layer having a first quantity of material and an outer layer having a second quantity of material.

9. The degasser pump of claim 8, wherein the first quantity of material is configured to provide abrasion resistance to drilling fluid passing through the pump rubber via the degasser pump.

10. The degasser pump of claim 8, wherein the second quantity of material is configured to provide fatigue resistance to the plurality of rollers configured to compress and decompress the pump rubber.

11. The degasser pump of claim 8, wherein the pump rubber is configured to bend at an angle of approximately 60 degrees within the degasser pump and is configured to compress and bend at an angle, thereby providing tension and compression at the points where the pump rubber is bent.

12. The degasser pump of claim 11, wherein where the pump rubber is bent within the degasser pump, the pump rubber is under tension and compression.

13. The degasser pump of claim 12, wherein the first quantity of materials and the second quantity of materials are configured to provide fatigue resistance to the pump rubber when the pump rubber is compressed and decompressed by the plurality of rollers under tension and compression.

14. A method for forming pump rubber, comprising: The first material is formed on the main shaft; A first portion of the second material is formed in the opening between portions of the first material; as well as A second portion of the second material is formed on the first portion of the first material and the first portion of the second material.

15. The method of claim 14, wherein the first portion forming the first material and the first portion forming the second material form the inner layer of the pump rubber.

16. The method of claim 14, wherein the second portion forming the second material forms the outer layer of the pump rubber.

17. The method of claim 14, further comprising, after forming the second portion of the second material, curing the first portion of the second material and the first portion of the second material.

18. The method of claim 14, further comprising placing the first material and the first portion of the second material in a mold, and forming the second portion of the second material in the mold.

19. The method of claim 14, wherein forming the first material comprises forming a fabric into the pump rubber as a hollow, elongated cylinder with an inner diameter dimension thereof.

20. The method of claim 19, wherein the second portion of forming the second material comprises forming an elastomeric material to the outer diameter dimension of the pump rubber.

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